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My video (.mkv) thumbnails are green (or monochromatic)?



The 2019 Stack Overflow Developer Survey Results Are InGreen Thumbnails in Ubuntu Gnome 17.04How do I enable the “Universe” repository?How do I enable the “multiverse” repository?How to edit files in a terminal with nano?What's a good back-up strategy for 1 desktop PC?Refresh thumbnails in nautilusHow do I install the ubuntu-restricted-extras package?Way to make video-thumbnails generate from VLC instead of Totem?MD5 hash for ubuntu .iso (14.04 through 18.10)No mp3 thumbnail (album art cover) when using ffmpegthumbnailer, in Ubuntu Gnome 17.04Can't play .MKV filesCan't generate thumbnails in NautilusHow can I instruct Nautilus to pre-generate thumbnails?MKV Video files are not paying properly.WMV files not playing anymore with VLC nor with Video application in 14.04Can't generate thumbnails from some mkv filesMkv thumbnails are not generating at allGreen Thumbnails in Ubuntu Gnome 17.04No mp3 thumbnail (album art cover) when using ffmpegthumbnailer, in Ubuntu Gnome 17.04Ubuntu 18.04 iPhone thumbnails



.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








5















When I installed Ubuntu Gnome 17.04 thumbnails for .mkv were not showing up at all, Then it automatically got fixed, now it's generating the Thumbnails but as weird as it may sound, they're all green (or purple or pink but they are all monochromatic for sure). files are not affected by this only the thumbnails. other video file formats are okay as well, .mp4 .flv, just the .mkv's are affected.



I've no idea where should I start to fix this.



Screenshot



affected .mkv files



screenshot2



not affected .mp4 files










share|improve this question
























  • It happens sometime for some reason that I don't know of. Try changing the default media player for the .mkv files to some other application (like vlc). And clear the thumbnail cache. It worked for me.

    – Kameshwaran
    Apr 24 '17 at 9:08






  • 1





    @SumeetDeshmukh Check the files in /usr/share/thumbnailers/ to see which thumbnailer is responsible for x-matroska. I use xfce which uses ffmpegthumbnailer by default. Here is (a bit older) example how to use ffmpegthumbnailer with Nautilus. I think your problem with the thumbnailer you actually use is a bug and you should report it to the developers.

    – mook765
    Apr 24 '17 at 11:40






  • 1





    @SumeetDeshmukh Check the link I mentioned.

    – mook765
    Apr 24 '17 at 11:46






  • 1





    Please edit the output of grep matroska /usr/share/thumbnailers/totem.thumbnailer into your post. It would also be helpful to know what codecs are in use for the files that present the discolored thumbnails and the files that don't. mediainfo can provide this.

    – Elder Geek
    Apr 24 '17 at 14:25







  • 2





    Instead of just saying "Doesn't work" - it would be helpful if you posted all the details that were included in the previous question. The same people are bound to ask for the same troubleshooting output to help solve your problem.

    – RobotHumans
    Apr 29 '17 at 8:47

















5















When I installed Ubuntu Gnome 17.04 thumbnails for .mkv were not showing up at all, Then it automatically got fixed, now it's generating the Thumbnails but as weird as it may sound, they're all green (or purple or pink but they are all monochromatic for sure). files are not affected by this only the thumbnails. other video file formats are okay as well, .mp4 .flv, just the .mkv's are affected.



I've no idea where should I start to fix this.



Screenshot



affected .mkv files



screenshot2



not affected .mp4 files










share|improve this question
























  • It happens sometime for some reason that I don't know of. Try changing the default media player for the .mkv files to some other application (like vlc). And clear the thumbnail cache. It worked for me.

    – Kameshwaran
    Apr 24 '17 at 9:08






  • 1





    @SumeetDeshmukh Check the files in /usr/share/thumbnailers/ to see which thumbnailer is responsible for x-matroska. I use xfce which uses ffmpegthumbnailer by default. Here is (a bit older) example how to use ffmpegthumbnailer with Nautilus. I think your problem with the thumbnailer you actually use is a bug and you should report it to the developers.

    – mook765
    Apr 24 '17 at 11:40






  • 1





    @SumeetDeshmukh Check the link I mentioned.

    – mook765
    Apr 24 '17 at 11:46






  • 1





    Please edit the output of grep matroska /usr/share/thumbnailers/totem.thumbnailer into your post. It would also be helpful to know what codecs are in use for the files that present the discolored thumbnails and the files that don't. mediainfo can provide this.

    – Elder Geek
    Apr 24 '17 at 14:25







  • 2





    Instead of just saying "Doesn't work" - it would be helpful if you posted all the details that were included in the previous question. The same people are bound to ask for the same troubleshooting output to help solve your problem.

    – RobotHumans
    Apr 29 '17 at 8:47













5












5








5


0






When I installed Ubuntu Gnome 17.04 thumbnails for .mkv were not showing up at all, Then it automatically got fixed, now it's generating the Thumbnails but as weird as it may sound, they're all green (or purple or pink but they are all monochromatic for sure). files are not affected by this only the thumbnails. other video file formats are okay as well, .mp4 .flv, just the .mkv's are affected.



I've no idea where should I start to fix this.



Screenshot



affected .mkv files



screenshot2



not affected .mp4 files










share|improve this question
















When I installed Ubuntu Gnome 17.04 thumbnails for .mkv were not showing up at all, Then it automatically got fixed, now it's generating the Thumbnails but as weird as it may sound, they're all green (or purple or pink but they are all monochromatic for sure). files are not affected by this only the thumbnails. other video file formats are okay as well, .mp4 .flv, just the .mkv's are affected.



I've no idea where should I start to fix this.



Screenshot



affected .mkv files



screenshot2



not affected .mp4 files







nautilus thumbnails mkv






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited May 21 '17 at 15:23







Sumeet Deshmukh

















asked Apr 22 '17 at 3:26









Sumeet DeshmukhSumeet Deshmukh

4,48663272




4,48663272












  • It happens sometime for some reason that I don't know of. Try changing the default media player for the .mkv files to some other application (like vlc). And clear the thumbnail cache. It worked for me.

    – Kameshwaran
    Apr 24 '17 at 9:08






  • 1





    @SumeetDeshmukh Check the files in /usr/share/thumbnailers/ to see which thumbnailer is responsible for x-matroska. I use xfce which uses ffmpegthumbnailer by default. Here is (a bit older) example how to use ffmpegthumbnailer with Nautilus. I think your problem with the thumbnailer you actually use is a bug and you should report it to the developers.

    – mook765
    Apr 24 '17 at 11:40






  • 1





    @SumeetDeshmukh Check the link I mentioned.

    – mook765
    Apr 24 '17 at 11:46






  • 1





    Please edit the output of grep matroska /usr/share/thumbnailers/totem.thumbnailer into your post. It would also be helpful to know what codecs are in use for the files that present the discolored thumbnails and the files that don't. mediainfo can provide this.

    – Elder Geek
    Apr 24 '17 at 14:25







  • 2





    Instead of just saying "Doesn't work" - it would be helpful if you posted all the details that were included in the previous question. The same people are bound to ask for the same troubleshooting output to help solve your problem.

    – RobotHumans
    Apr 29 '17 at 8:47

















  • It happens sometime for some reason that I don't know of. Try changing the default media player for the .mkv files to some other application (like vlc). And clear the thumbnail cache. It worked for me.

    – Kameshwaran
    Apr 24 '17 at 9:08






  • 1





    @SumeetDeshmukh Check the files in /usr/share/thumbnailers/ to see which thumbnailer is responsible for x-matroska. I use xfce which uses ffmpegthumbnailer by default. Here is (a bit older) example how to use ffmpegthumbnailer with Nautilus. I think your problem with the thumbnailer you actually use is a bug and you should report it to the developers.

    – mook765
    Apr 24 '17 at 11:40






  • 1





    @SumeetDeshmukh Check the link I mentioned.

    – mook765
    Apr 24 '17 at 11:46






  • 1





    Please edit the output of grep matroska /usr/share/thumbnailers/totem.thumbnailer into your post. It would also be helpful to know what codecs are in use for the files that present the discolored thumbnails and the files that don't. mediainfo can provide this.

    – Elder Geek
    Apr 24 '17 at 14:25







  • 2





    Instead of just saying "Doesn't work" - it would be helpful if you posted all the details that were included in the previous question. The same people are bound to ask for the same troubleshooting output to help solve your problem.

    – RobotHumans
    Apr 29 '17 at 8:47
















It happens sometime for some reason that I don't know of. Try changing the default media player for the .mkv files to some other application (like vlc). And clear the thumbnail cache. It worked for me.

– Kameshwaran
Apr 24 '17 at 9:08





It happens sometime for some reason that I don't know of. Try changing the default media player for the .mkv files to some other application (like vlc). And clear the thumbnail cache. It worked for me.

– Kameshwaran
Apr 24 '17 at 9:08




1




1





@SumeetDeshmukh Check the files in /usr/share/thumbnailers/ to see which thumbnailer is responsible for x-matroska. I use xfce which uses ffmpegthumbnailer by default. Here is (a bit older) example how to use ffmpegthumbnailer with Nautilus. I think your problem with the thumbnailer you actually use is a bug and you should report it to the developers.

– mook765
Apr 24 '17 at 11:40





@SumeetDeshmukh Check the files in /usr/share/thumbnailers/ to see which thumbnailer is responsible for x-matroska. I use xfce which uses ffmpegthumbnailer by default. Here is (a bit older) example how to use ffmpegthumbnailer with Nautilus. I think your problem with the thumbnailer you actually use is a bug and you should report it to the developers.

– mook765
Apr 24 '17 at 11:40




1




1





@SumeetDeshmukh Check the link I mentioned.

– mook765
Apr 24 '17 at 11:46





@SumeetDeshmukh Check the link I mentioned.

– mook765
Apr 24 '17 at 11:46




1




1





Please edit the output of grep matroska /usr/share/thumbnailers/totem.thumbnailer into your post. It would also be helpful to know what codecs are in use for the files that present the discolored thumbnails and the files that don't. mediainfo can provide this.

– Elder Geek
Apr 24 '17 at 14:25






Please edit the output of grep matroska /usr/share/thumbnailers/totem.thumbnailer into your post. It would also be helpful to know what codecs are in use for the files that present the discolored thumbnails and the files that don't. mediainfo can provide this.

– Elder Geek
Apr 24 '17 at 14:25





2




2





Instead of just saying "Doesn't work" - it would be helpful if you posted all the details that were included in the previous question. The same people are bound to ask for the same troubleshooting output to help solve your problem.

– RobotHumans
Apr 29 '17 at 8:47





Instead of just saying "Doesn't work" - it would be helpful if you posted all the details that were included in the previous question. The same people are bound to ask for the same troubleshooting output to help solve your problem.

– RobotHumans
Apr 29 '17 at 8:47










3 Answers
3






active

oldest

votes


















7














This answer is based on Another answer posted by Elder Geek, this just makes it easy for new users to execute



Original Work




For 17.04



Enable Multiverse and Universe repositories



Open the software and updates app and select multiverse and universe repositories



software and update screenshot



and run the following command after enabling them



sudo apt-get update


Install ubuntu-restricted-extras



sudo apt-get install ubuntu-restricted-extras


This command should do it, You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement, How do I install the ubuntu-restricted extras package? (for more details)



You don't need to install ubuntu-restricted-extras if you've already installed media drivers while installing ubuntu



Install ffmpeg



sudo apt-get install ffmpeg ffmpegthumbnailer


These commands will install ffmpeg, after that delete all the existing thumbnails. by doing



rm -r ~/.cache/thumbnails


Change the job of creating thumbnails from Totem to ffmpeg



sudo nano /usr/share/thumbnailers/totem.thumbnailer


a text file will open up, replace all the text inside it with the following



[Thumbnailer Entry]
TryExec=ffmpegthumbnailer
Exec=ffmpegthumbnailer -s %s -i %i -o %o -c png -f -t 10
MimeType=application/mxf;application/ogg;application/ram;application/sdp;application/vnd.ms-wpl;application/vnd.rn-realmedia;application/x-extension-m4a;application/x-extension-mp4;application/x-flash-video;application/x-matroska;application/x-netshow-channel;application/x-ogg;application/x-quicktimeplayer;application/x-shorten;image/vnd.rn-realpix;image/x-pict;misc/ultravox;text/x-google-video-pointer;video/3gpp;video/dv;video/fli;video/flv;video/mp2t;video/mp4;video/mp4v-es;video/mpeg;video/msvideo;video/ogg;video/quicktime;video/vivo;video/vnd.divx;video/vnd.rn-realvideo;video/vnd.vivo;video/webm;video/x-anim;video/x-avi;video/x-flc;video/x-fli;video/x-flic;video/x-flv;video/x-m4v;video/x-matroska;video/x-mpeg;video/x-ms-asf;video/x-ms-asx;video/x-msvideo;video/x-ms-wm;video/x-ms-wmv;video/x-ms-wmx;video/x-ms-wvx;video/x-nsv;video/x-ogm+ogg;video/x-theora+ogg;video/x-totem-stream;audio/x-pn-realaudio;audio/3gpp;audio/ac3;audio/AMR;audio/AMR-WB;audio/basic;audio/midi;audio/mp2;audio/mp4;audio/mpeg;audio/ogg;audio/prs.sid;audio/vnd.rn-realaudio;audio/x-aiff;audio/x-ape;audio/x-flac;audio/x-gsm;audio/x-it;audio/x-m4a;audio/x-matroska;audio/x-mod;audio/x-mp3;audio/x-mpeg;audio/x-ms-asf;audio/x-ms-asx;audio/x-ms-wax;audio/x-ms-wma;audio/x-musepack;audio/x-pn-aiff;audio/x-pn-au;audio/x-pn-wav;audio/x-pn-windows-acm;audio/x-realaudio;audio/x-real-audio;audio/x-sbc;audio/x-speex;audio/x-tta;audio/x-wav;audio/x-wavpack;audio/x-vorbis;audio/x-vorbis+ogg;audio/x-xm;application/x-flac;


To save updated file in Nano press Ctrl + X and then type y and enter. How to edit files in a terminal with nano?



You can use other text editing apps to edit /usr/share/thumbnailers/totem.thumbnailer file if you're not comfortable using nano



and the restart nautilus



nautilus -q


Clear all the thumbnails again and check if you're problem is solved



rm -r ~/.cache/thumbnails


The command above will clear all the thumbnails again, go check them, they will not be monochromatic now'




If you're losing Mp3/flac thumbnails after doing this, then try this approach instead






share|improve this answer




















  • 1





    Already reversed the vote and requested the merge this morning.

    – RobotHumans
    Apr 30 '17 at 15:01


















4





+50









Based on the results of our testing, I believe that the issue is totem generation of thumbnails for nautilus when utilizing the HEVC codec. As I recall, totem utilizes gstreamer plugins for this task. While I would normally expect the installation of the ubuntu-restricted-extras package to resolve most codec issues, in this case it appears that's not true. It seems that the the x265 HEVC support isn't included. There are a couple of options, I can suggest.



Edit: After testing on 17.04 live media created from ubuntu-17.04-desktop-amd64.iso today (after confirming that the downloaded iso was uncorrupted by checking the hash)I can confirm that the following approach produces the desired results of appropriately colored thumbnails.



Enable both the multiverse and universe repositories via Software & Updates on the Ubuntu Software Tab by checking the aforementioned boxes. Install ubuntu-restricted-extras via either the software center or CLI with sudo apt update && sudo apt install ubuntu-restricted-extras You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement. Then all the requisite packages will be downlowded and installed. Close Nautilus if it's open and then refresh your thumbnails with rm -r ~/.cache/thumbnails



The options below may have some value in certain situations so I'll leave them as is.




A) Install the libavcodec-extra57 package and all it's dependencies. This package contains the ffmpeg library with additional de/encoders for audio/video codecs. I believe the critical dependency here is the libx265-110 library that the aforementioned libavcodec-extra57 package relies on for HEVC encoding/decoding.



You can install the libavcodec-extra57 package after first completing the instrucions at How do I enable the "Universe" repository? and then installing the package either through the software center or via the command line with sudo apt-get update && sudo apt-get install libavcodec-extra57



If this by itself doesn't resolve the issue, you can add the step of changing to a different thumb nailer using one of the options described in Way to make video-thumbnails generate from VLC instead of Totem?



B) If that doesn't do the trick, utilize the libde265 package also in the Universe repository. I had good results with this package on 14.04 (I had to install it via PPA back then) It looks like I'm still using it successfully under 16.04 (likely an upgrade rather than a clean install.



dpkg -l libde265
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===========================-==================-==================-===========================================================
ii libde265:amd64 1.0.2-1ppa1~trusty amd64 Open H.265 video codec implementation


Regardless of the approach you'll have to regenerate your thumbnails again.



Note: I always recommend backups to make it easy to revert back if changes don't have the appropriate result. It's become clear to me that many don't bother to do this any where near as often as they should.






share|improve this answer
































    0














    Just to add.. I found the root cause of this. I switched my personal encodes from h.264 to H.EVC, no green thumbnails. Switched to 10-bit H.EVC encodes, green thumbnails. ffmpeg-thumbnailer it is then...



    I'm using .mp4 container with 10-bit H.265, but I would not be surprised to find a lot of .mkv online are 10-bit encodes with a lot of the .mp4 containing more traditional 8-bit h.264 video.





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      3 Answers
      3






      active

      oldest

      votes








      3 Answers
      3






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      7














      This answer is based on Another answer posted by Elder Geek, this just makes it easy for new users to execute



      Original Work




      For 17.04



      Enable Multiverse and Universe repositories



      Open the software and updates app and select multiverse and universe repositories



      software and update screenshot



      and run the following command after enabling them



      sudo apt-get update


      Install ubuntu-restricted-extras



      sudo apt-get install ubuntu-restricted-extras


      This command should do it, You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement, How do I install the ubuntu-restricted extras package? (for more details)



      You don't need to install ubuntu-restricted-extras if you've already installed media drivers while installing ubuntu



      Install ffmpeg



      sudo apt-get install ffmpeg ffmpegthumbnailer


      These commands will install ffmpeg, after that delete all the existing thumbnails. by doing



      rm -r ~/.cache/thumbnails


      Change the job of creating thumbnails from Totem to ffmpeg



      sudo nano /usr/share/thumbnailers/totem.thumbnailer


      a text file will open up, replace all the text inside it with the following



      [Thumbnailer Entry]
      TryExec=ffmpegthumbnailer
      Exec=ffmpegthumbnailer -s %s -i %i -o %o -c png -f -t 10
      MimeType=application/mxf;application/ogg;application/ram;application/sdp;application/vnd.ms-wpl;application/vnd.rn-realmedia;application/x-extension-m4a;application/x-extension-mp4;application/x-flash-video;application/x-matroska;application/x-netshow-channel;application/x-ogg;application/x-quicktimeplayer;application/x-shorten;image/vnd.rn-realpix;image/x-pict;misc/ultravox;text/x-google-video-pointer;video/3gpp;video/dv;video/fli;video/flv;video/mp2t;video/mp4;video/mp4v-es;video/mpeg;video/msvideo;video/ogg;video/quicktime;video/vivo;video/vnd.divx;video/vnd.rn-realvideo;video/vnd.vivo;video/webm;video/x-anim;video/x-avi;video/x-flc;video/x-fli;video/x-flic;video/x-flv;video/x-m4v;video/x-matroska;video/x-mpeg;video/x-ms-asf;video/x-ms-asx;video/x-msvideo;video/x-ms-wm;video/x-ms-wmv;video/x-ms-wmx;video/x-ms-wvx;video/x-nsv;video/x-ogm+ogg;video/x-theora+ogg;video/x-totem-stream;audio/x-pn-realaudio;audio/3gpp;audio/ac3;audio/AMR;audio/AMR-WB;audio/basic;audio/midi;audio/mp2;audio/mp4;audio/mpeg;audio/ogg;audio/prs.sid;audio/vnd.rn-realaudio;audio/x-aiff;audio/x-ape;audio/x-flac;audio/x-gsm;audio/x-it;audio/x-m4a;audio/x-matroska;audio/x-mod;audio/x-mp3;audio/x-mpeg;audio/x-ms-asf;audio/x-ms-asx;audio/x-ms-wax;audio/x-ms-wma;audio/x-musepack;audio/x-pn-aiff;audio/x-pn-au;audio/x-pn-wav;audio/x-pn-windows-acm;audio/x-realaudio;audio/x-real-audio;audio/x-sbc;audio/x-speex;audio/x-tta;audio/x-wav;audio/x-wavpack;audio/x-vorbis;audio/x-vorbis+ogg;audio/x-xm;application/x-flac;


      To save updated file in Nano press Ctrl + X and then type y and enter. How to edit files in a terminal with nano?



      You can use other text editing apps to edit /usr/share/thumbnailers/totem.thumbnailer file if you're not comfortable using nano



      and the restart nautilus



      nautilus -q


      Clear all the thumbnails again and check if you're problem is solved



      rm -r ~/.cache/thumbnails


      The command above will clear all the thumbnails again, go check them, they will not be monochromatic now'




      If you're losing Mp3/flac thumbnails after doing this, then try this approach instead






      share|improve this answer




















      • 1





        Already reversed the vote and requested the merge this morning.

        – RobotHumans
        Apr 30 '17 at 15:01















      7














      This answer is based on Another answer posted by Elder Geek, this just makes it easy for new users to execute



      Original Work




      For 17.04



      Enable Multiverse and Universe repositories



      Open the software and updates app and select multiverse and universe repositories



      software and update screenshot



      and run the following command after enabling them



      sudo apt-get update


      Install ubuntu-restricted-extras



      sudo apt-get install ubuntu-restricted-extras


      This command should do it, You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement, How do I install the ubuntu-restricted extras package? (for more details)



      You don't need to install ubuntu-restricted-extras if you've already installed media drivers while installing ubuntu



      Install ffmpeg



      sudo apt-get install ffmpeg ffmpegthumbnailer


      These commands will install ffmpeg, after that delete all the existing thumbnails. by doing



      rm -r ~/.cache/thumbnails


      Change the job of creating thumbnails from Totem to ffmpeg



      sudo nano /usr/share/thumbnailers/totem.thumbnailer


      a text file will open up, replace all the text inside it with the following



      [Thumbnailer Entry]
      TryExec=ffmpegthumbnailer
      Exec=ffmpegthumbnailer -s %s -i %i -o %o -c png -f -t 10
      MimeType=application/mxf;application/ogg;application/ram;application/sdp;application/vnd.ms-wpl;application/vnd.rn-realmedia;application/x-extension-m4a;application/x-extension-mp4;application/x-flash-video;application/x-matroska;application/x-netshow-channel;application/x-ogg;application/x-quicktimeplayer;application/x-shorten;image/vnd.rn-realpix;image/x-pict;misc/ultravox;text/x-google-video-pointer;video/3gpp;video/dv;video/fli;video/flv;video/mp2t;video/mp4;video/mp4v-es;video/mpeg;video/msvideo;video/ogg;video/quicktime;video/vivo;video/vnd.divx;video/vnd.rn-realvideo;video/vnd.vivo;video/webm;video/x-anim;video/x-avi;video/x-flc;video/x-fli;video/x-flic;video/x-flv;video/x-m4v;video/x-matroska;video/x-mpeg;video/x-ms-asf;video/x-ms-asx;video/x-msvideo;video/x-ms-wm;video/x-ms-wmv;video/x-ms-wmx;video/x-ms-wvx;video/x-nsv;video/x-ogm+ogg;video/x-theora+ogg;video/x-totem-stream;audio/x-pn-realaudio;audio/3gpp;audio/ac3;audio/AMR;audio/AMR-WB;audio/basic;audio/midi;audio/mp2;audio/mp4;audio/mpeg;audio/ogg;audio/prs.sid;audio/vnd.rn-realaudio;audio/x-aiff;audio/x-ape;audio/x-flac;audio/x-gsm;audio/x-it;audio/x-m4a;audio/x-matroska;audio/x-mod;audio/x-mp3;audio/x-mpeg;audio/x-ms-asf;audio/x-ms-asx;audio/x-ms-wax;audio/x-ms-wma;audio/x-musepack;audio/x-pn-aiff;audio/x-pn-au;audio/x-pn-wav;audio/x-pn-windows-acm;audio/x-realaudio;audio/x-real-audio;audio/x-sbc;audio/x-speex;audio/x-tta;audio/x-wav;audio/x-wavpack;audio/x-vorbis;audio/x-vorbis+ogg;audio/x-xm;application/x-flac;


      To save updated file in Nano press Ctrl + X and then type y and enter. How to edit files in a terminal with nano?



      You can use other text editing apps to edit /usr/share/thumbnailers/totem.thumbnailer file if you're not comfortable using nano



      and the restart nautilus



      nautilus -q


      Clear all the thumbnails again and check if you're problem is solved



      rm -r ~/.cache/thumbnails


      The command above will clear all the thumbnails again, go check them, they will not be monochromatic now'




      If you're losing Mp3/flac thumbnails after doing this, then try this approach instead






      share|improve this answer




















      • 1





        Already reversed the vote and requested the merge this morning.

        – RobotHumans
        Apr 30 '17 at 15:01













      7












      7








      7







      This answer is based on Another answer posted by Elder Geek, this just makes it easy for new users to execute



      Original Work




      For 17.04



      Enable Multiverse and Universe repositories



      Open the software and updates app and select multiverse and universe repositories



      software and update screenshot



      and run the following command after enabling them



      sudo apt-get update


      Install ubuntu-restricted-extras



      sudo apt-get install ubuntu-restricted-extras


      This command should do it, You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement, How do I install the ubuntu-restricted extras package? (for more details)



      You don't need to install ubuntu-restricted-extras if you've already installed media drivers while installing ubuntu



      Install ffmpeg



      sudo apt-get install ffmpeg ffmpegthumbnailer


      These commands will install ffmpeg, after that delete all the existing thumbnails. by doing



      rm -r ~/.cache/thumbnails


      Change the job of creating thumbnails from Totem to ffmpeg



      sudo nano /usr/share/thumbnailers/totem.thumbnailer


      a text file will open up, replace all the text inside it with the following



      [Thumbnailer Entry]
      TryExec=ffmpegthumbnailer
      Exec=ffmpegthumbnailer -s %s -i %i -o %o -c png -f -t 10
      MimeType=application/mxf;application/ogg;application/ram;application/sdp;application/vnd.ms-wpl;application/vnd.rn-realmedia;application/x-extension-m4a;application/x-extension-mp4;application/x-flash-video;application/x-matroska;application/x-netshow-channel;application/x-ogg;application/x-quicktimeplayer;application/x-shorten;image/vnd.rn-realpix;image/x-pict;misc/ultravox;text/x-google-video-pointer;video/3gpp;video/dv;video/fli;video/flv;video/mp2t;video/mp4;video/mp4v-es;video/mpeg;video/msvideo;video/ogg;video/quicktime;video/vivo;video/vnd.divx;video/vnd.rn-realvideo;video/vnd.vivo;video/webm;video/x-anim;video/x-avi;video/x-flc;video/x-fli;video/x-flic;video/x-flv;video/x-m4v;video/x-matroska;video/x-mpeg;video/x-ms-asf;video/x-ms-asx;video/x-msvideo;video/x-ms-wm;video/x-ms-wmv;video/x-ms-wmx;video/x-ms-wvx;video/x-nsv;video/x-ogm+ogg;video/x-theora+ogg;video/x-totem-stream;audio/x-pn-realaudio;audio/3gpp;audio/ac3;audio/AMR;audio/AMR-WB;audio/basic;audio/midi;audio/mp2;audio/mp4;audio/mpeg;audio/ogg;audio/prs.sid;audio/vnd.rn-realaudio;audio/x-aiff;audio/x-ape;audio/x-flac;audio/x-gsm;audio/x-it;audio/x-m4a;audio/x-matroska;audio/x-mod;audio/x-mp3;audio/x-mpeg;audio/x-ms-asf;audio/x-ms-asx;audio/x-ms-wax;audio/x-ms-wma;audio/x-musepack;audio/x-pn-aiff;audio/x-pn-au;audio/x-pn-wav;audio/x-pn-windows-acm;audio/x-realaudio;audio/x-real-audio;audio/x-sbc;audio/x-speex;audio/x-tta;audio/x-wav;audio/x-wavpack;audio/x-vorbis;audio/x-vorbis+ogg;audio/x-xm;application/x-flac;


      To save updated file in Nano press Ctrl + X and then type y and enter. How to edit files in a terminal with nano?



      You can use other text editing apps to edit /usr/share/thumbnailers/totem.thumbnailer file if you're not comfortable using nano



      and the restart nautilus



      nautilus -q


      Clear all the thumbnails again and check if you're problem is solved



      rm -r ~/.cache/thumbnails


      The command above will clear all the thumbnails again, go check them, they will not be monochromatic now'




      If you're losing Mp3/flac thumbnails after doing this, then try this approach instead






      share|improve this answer















      This answer is based on Another answer posted by Elder Geek, this just makes it easy for new users to execute



      Original Work




      For 17.04



      Enable Multiverse and Universe repositories



      Open the software and updates app and select multiverse and universe repositories



      software and update screenshot



      and run the following command after enabling them



      sudo apt-get update


      Install ubuntu-restricted-extras



      sudo apt-get install ubuntu-restricted-extras


      This command should do it, You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement, How do I install the ubuntu-restricted extras package? (for more details)



      You don't need to install ubuntu-restricted-extras if you've already installed media drivers while installing ubuntu



      Install ffmpeg



      sudo apt-get install ffmpeg ffmpegthumbnailer


      These commands will install ffmpeg, after that delete all the existing thumbnails. by doing



      rm -r ~/.cache/thumbnails


      Change the job of creating thumbnails from Totem to ffmpeg



      sudo nano /usr/share/thumbnailers/totem.thumbnailer


      a text file will open up, replace all the text inside it with the following



      [Thumbnailer Entry]
      TryExec=ffmpegthumbnailer
      Exec=ffmpegthumbnailer -s %s -i %i -o %o -c png -f -t 10
      MimeType=application/mxf;application/ogg;application/ram;application/sdp;application/vnd.ms-wpl;application/vnd.rn-realmedia;application/x-extension-m4a;application/x-extension-mp4;application/x-flash-video;application/x-matroska;application/x-netshow-channel;application/x-ogg;application/x-quicktimeplayer;application/x-shorten;image/vnd.rn-realpix;image/x-pict;misc/ultravox;text/x-google-video-pointer;video/3gpp;video/dv;video/fli;video/flv;video/mp2t;video/mp4;video/mp4v-es;video/mpeg;video/msvideo;video/ogg;video/quicktime;video/vivo;video/vnd.divx;video/vnd.rn-realvideo;video/vnd.vivo;video/webm;video/x-anim;video/x-avi;video/x-flc;video/x-fli;video/x-flic;video/x-flv;video/x-m4v;video/x-matroska;video/x-mpeg;video/x-ms-asf;video/x-ms-asx;video/x-msvideo;video/x-ms-wm;video/x-ms-wmv;video/x-ms-wmx;video/x-ms-wvx;video/x-nsv;video/x-ogm+ogg;video/x-theora+ogg;video/x-totem-stream;audio/x-pn-realaudio;audio/3gpp;audio/ac3;audio/AMR;audio/AMR-WB;audio/basic;audio/midi;audio/mp2;audio/mp4;audio/mpeg;audio/ogg;audio/prs.sid;audio/vnd.rn-realaudio;audio/x-aiff;audio/x-ape;audio/x-flac;audio/x-gsm;audio/x-it;audio/x-m4a;audio/x-matroska;audio/x-mod;audio/x-mp3;audio/x-mpeg;audio/x-ms-asf;audio/x-ms-asx;audio/x-ms-wax;audio/x-ms-wma;audio/x-musepack;audio/x-pn-aiff;audio/x-pn-au;audio/x-pn-wav;audio/x-pn-windows-acm;audio/x-realaudio;audio/x-real-audio;audio/x-sbc;audio/x-speex;audio/x-tta;audio/x-wav;audio/x-wavpack;audio/x-vorbis;audio/x-vorbis+ogg;audio/x-xm;application/x-flac;


      To save updated file in Nano press Ctrl + X and then type y and enter. How to edit files in a terminal with nano?



      You can use other text editing apps to edit /usr/share/thumbnailers/totem.thumbnailer file if you're not comfortable using nano



      and the restart nautilus



      nautilus -q


      Clear all the thumbnails again and check if you're problem is solved



      rm -r ~/.cache/thumbnails


      The command above will clear all the thumbnails again, go check them, they will not be monochromatic now'




      If you're losing Mp3/flac thumbnails after doing this, then try this approach instead







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited Sep 28 '17 at 8:11

























      answered Apr 29 '17 at 15:12









      Sumeet DeshmukhSumeet Deshmukh

      4,48663272




      4,48663272







      • 1





        Already reversed the vote and requested the merge this morning.

        – RobotHumans
        Apr 30 '17 at 15:01












      • 1





        Already reversed the vote and requested the merge this morning.

        – RobotHumans
        Apr 30 '17 at 15:01







      1




      1





      Already reversed the vote and requested the merge this morning.

      – RobotHumans
      Apr 30 '17 at 15:01





      Already reversed the vote and requested the merge this morning.

      – RobotHumans
      Apr 30 '17 at 15:01













      4





      +50









      Based on the results of our testing, I believe that the issue is totem generation of thumbnails for nautilus when utilizing the HEVC codec. As I recall, totem utilizes gstreamer plugins for this task. While I would normally expect the installation of the ubuntu-restricted-extras package to resolve most codec issues, in this case it appears that's not true. It seems that the the x265 HEVC support isn't included. There are a couple of options, I can suggest.



      Edit: After testing on 17.04 live media created from ubuntu-17.04-desktop-amd64.iso today (after confirming that the downloaded iso was uncorrupted by checking the hash)I can confirm that the following approach produces the desired results of appropriately colored thumbnails.



      Enable both the multiverse and universe repositories via Software & Updates on the Ubuntu Software Tab by checking the aforementioned boxes. Install ubuntu-restricted-extras via either the software center or CLI with sudo apt update && sudo apt install ubuntu-restricted-extras You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement. Then all the requisite packages will be downlowded and installed. Close Nautilus if it's open and then refresh your thumbnails with rm -r ~/.cache/thumbnails



      The options below may have some value in certain situations so I'll leave them as is.




      A) Install the libavcodec-extra57 package and all it's dependencies. This package contains the ffmpeg library with additional de/encoders for audio/video codecs. I believe the critical dependency here is the libx265-110 library that the aforementioned libavcodec-extra57 package relies on for HEVC encoding/decoding.



      You can install the libavcodec-extra57 package after first completing the instrucions at How do I enable the "Universe" repository? and then installing the package either through the software center or via the command line with sudo apt-get update && sudo apt-get install libavcodec-extra57



      If this by itself doesn't resolve the issue, you can add the step of changing to a different thumb nailer using one of the options described in Way to make video-thumbnails generate from VLC instead of Totem?



      B) If that doesn't do the trick, utilize the libde265 package also in the Universe repository. I had good results with this package on 14.04 (I had to install it via PPA back then) It looks like I'm still using it successfully under 16.04 (likely an upgrade rather than a clean install.



      dpkg -l libde265
      Desired=Unknown/Install/Remove/Purge/Hold
      | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
      |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
      ||/ Name Version Architecture Description
      +++-===========================-==================-==================-===========================================================
      ii libde265:amd64 1.0.2-1ppa1~trusty amd64 Open H.265 video codec implementation


      Regardless of the approach you'll have to regenerate your thumbnails again.



      Note: I always recommend backups to make it easy to revert back if changes don't have the appropriate result. It's become clear to me that many don't bother to do this any where near as often as they should.






      share|improve this answer





























        4





        +50









        Based on the results of our testing, I believe that the issue is totem generation of thumbnails for nautilus when utilizing the HEVC codec. As I recall, totem utilizes gstreamer plugins for this task. While I would normally expect the installation of the ubuntu-restricted-extras package to resolve most codec issues, in this case it appears that's not true. It seems that the the x265 HEVC support isn't included. There are a couple of options, I can suggest.



        Edit: After testing on 17.04 live media created from ubuntu-17.04-desktop-amd64.iso today (after confirming that the downloaded iso was uncorrupted by checking the hash)I can confirm that the following approach produces the desired results of appropriately colored thumbnails.



        Enable both the multiverse and universe repositories via Software & Updates on the Ubuntu Software Tab by checking the aforementioned boxes. Install ubuntu-restricted-extras via either the software center or CLI with sudo apt update && sudo apt install ubuntu-restricted-extras You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement. Then all the requisite packages will be downlowded and installed. Close Nautilus if it's open and then refresh your thumbnails with rm -r ~/.cache/thumbnails



        The options below may have some value in certain situations so I'll leave them as is.




        A) Install the libavcodec-extra57 package and all it's dependencies. This package contains the ffmpeg library with additional de/encoders for audio/video codecs. I believe the critical dependency here is the libx265-110 library that the aforementioned libavcodec-extra57 package relies on for HEVC encoding/decoding.



        You can install the libavcodec-extra57 package after first completing the instrucions at How do I enable the "Universe" repository? and then installing the package either through the software center or via the command line with sudo apt-get update && sudo apt-get install libavcodec-extra57



        If this by itself doesn't resolve the issue, you can add the step of changing to a different thumb nailer using one of the options described in Way to make video-thumbnails generate from VLC instead of Totem?



        B) If that doesn't do the trick, utilize the libde265 package also in the Universe repository. I had good results with this package on 14.04 (I had to install it via PPA back then) It looks like I'm still using it successfully under 16.04 (likely an upgrade rather than a clean install.



        dpkg -l libde265
        Desired=Unknown/Install/Remove/Purge/Hold
        | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
        |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
        ||/ Name Version Architecture Description
        +++-===========================-==================-==================-===========================================================
        ii libde265:amd64 1.0.2-1ppa1~trusty amd64 Open H.265 video codec implementation


        Regardless of the approach you'll have to regenerate your thumbnails again.



        Note: I always recommend backups to make it easy to revert back if changes don't have the appropriate result. It's become clear to me that many don't bother to do this any where near as often as they should.






        share|improve this answer



























          4





          +50







          4





          +50



          4




          +50





          Based on the results of our testing, I believe that the issue is totem generation of thumbnails for nautilus when utilizing the HEVC codec. As I recall, totem utilizes gstreamer plugins for this task. While I would normally expect the installation of the ubuntu-restricted-extras package to resolve most codec issues, in this case it appears that's not true. It seems that the the x265 HEVC support isn't included. There are a couple of options, I can suggest.



          Edit: After testing on 17.04 live media created from ubuntu-17.04-desktop-amd64.iso today (after confirming that the downloaded iso was uncorrupted by checking the hash)I can confirm that the following approach produces the desired results of appropriately colored thumbnails.



          Enable both the multiverse and universe repositories via Software & Updates on the Ubuntu Software Tab by checking the aforementioned boxes. Install ubuntu-restricted-extras via either the software center or CLI with sudo apt update && sudo apt install ubuntu-restricted-extras You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement. Then all the requisite packages will be downlowded and installed. Close Nautilus if it's open and then refresh your thumbnails with rm -r ~/.cache/thumbnails



          The options below may have some value in certain situations so I'll leave them as is.




          A) Install the libavcodec-extra57 package and all it's dependencies. This package contains the ffmpeg library with additional de/encoders for audio/video codecs. I believe the critical dependency here is the libx265-110 library that the aforementioned libavcodec-extra57 package relies on for HEVC encoding/decoding.



          You can install the libavcodec-extra57 package after first completing the instrucions at How do I enable the "Universe" repository? and then installing the package either through the software center or via the command line with sudo apt-get update && sudo apt-get install libavcodec-extra57



          If this by itself doesn't resolve the issue, you can add the step of changing to a different thumb nailer using one of the options described in Way to make video-thumbnails generate from VLC instead of Totem?



          B) If that doesn't do the trick, utilize the libde265 package also in the Universe repository. I had good results with this package on 14.04 (I had to install it via PPA back then) It looks like I'm still using it successfully under 16.04 (likely an upgrade rather than a clean install.



          dpkg -l libde265
          Desired=Unknown/Install/Remove/Purge/Hold
          | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
          |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
          ||/ Name Version Architecture Description
          +++-===========================-==================-==================-===========================================================
          ii libde265:amd64 1.0.2-1ppa1~trusty amd64 Open H.265 video codec implementation


          Regardless of the approach you'll have to regenerate your thumbnails again.



          Note: I always recommend backups to make it easy to revert back if changes don't have the appropriate result. It's become clear to me that many don't bother to do this any where near as often as they should.






          share|improve this answer















          Based on the results of our testing, I believe that the issue is totem generation of thumbnails for nautilus when utilizing the HEVC codec. As I recall, totem utilizes gstreamer plugins for this task. While I would normally expect the installation of the ubuntu-restricted-extras package to resolve most codec issues, in this case it appears that's not true. It seems that the the x265 HEVC support isn't included. There are a couple of options, I can suggest.



          Edit: After testing on 17.04 live media created from ubuntu-17.04-desktop-amd64.iso today (after confirming that the downloaded iso was uncorrupted by checking the hash)I can confirm that the following approach produces the desired results of appropriately colored thumbnails.



          Enable both the multiverse and universe repositories via Software & Updates on the Ubuntu Software Tab by checking the aforementioned boxes. Install ubuntu-restricted-extras via either the software center or CLI with sudo apt update && sudo apt install ubuntu-restricted-extras You'll need to use the Tab key to highlight the OK button for the mscore fonts package and hit enter to accept the agreement. Then all the requisite packages will be downlowded and installed. Close Nautilus if it's open and then refresh your thumbnails with rm -r ~/.cache/thumbnails



          The options below may have some value in certain situations so I'll leave them as is.




          A) Install the libavcodec-extra57 package and all it's dependencies. This package contains the ffmpeg library with additional de/encoders for audio/video codecs. I believe the critical dependency here is the libx265-110 library that the aforementioned libavcodec-extra57 package relies on for HEVC encoding/decoding.



          You can install the libavcodec-extra57 package after first completing the instrucions at How do I enable the "Universe" repository? and then installing the package either through the software center or via the command line with sudo apt-get update && sudo apt-get install libavcodec-extra57



          If this by itself doesn't resolve the issue, you can add the step of changing to a different thumb nailer using one of the options described in Way to make video-thumbnails generate from VLC instead of Totem?



          B) If that doesn't do the trick, utilize the libde265 package also in the Universe repository. I had good results with this package on 14.04 (I had to install it via PPA back then) It looks like I'm still using it successfully under 16.04 (likely an upgrade rather than a clean install.



          dpkg -l libde265
          Desired=Unknown/Install/Remove/Purge/Hold
          | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
          |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
          ||/ Name Version Architecture Description
          +++-===========================-==================-==================-===========================================================
          ii libde265:amd64 1.0.2-1ppa1~trusty amd64 Open H.265 video codec implementation


          Regardless of the approach you'll have to regenerate your thumbnails again.



          Note: I always recommend backups to make it easy to revert back if changes don't have the appropriate result. It's become clear to me that many don't bother to do this any where near as often as they should.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Apr 28 '17 at 22:25

























          answered Apr 24 '17 at 17:52









          Elder GeekElder Geek

          27.5k1055130




          27.5k1055130





















              0














              Just to add.. I found the root cause of this. I switched my personal encodes from h.264 to H.EVC, no green thumbnails. Switched to 10-bit H.EVC encodes, green thumbnails. ffmpeg-thumbnailer it is then...



              I'm using .mp4 container with 10-bit H.265, but I would not be surprised to find a lot of .mkv online are 10-bit encodes with a lot of the .mp4 containing more traditional 8-bit h.264 video.





              share



























                0














                Just to add.. I found the root cause of this. I switched my personal encodes from h.264 to H.EVC, no green thumbnails. Switched to 10-bit H.EVC encodes, green thumbnails. ffmpeg-thumbnailer it is then...



                I'm using .mp4 container with 10-bit H.265, but I would not be surprised to find a lot of .mkv online are 10-bit encodes with a lot of the .mp4 containing more traditional 8-bit h.264 video.





                share

























                  0












                  0








                  0







                  Just to add.. I found the root cause of this. I switched my personal encodes from h.264 to H.EVC, no green thumbnails. Switched to 10-bit H.EVC encodes, green thumbnails. ffmpeg-thumbnailer it is then...



                  I'm using .mp4 container with 10-bit H.265, but I would not be surprised to find a lot of .mkv online are 10-bit encodes with a lot of the .mp4 containing more traditional 8-bit h.264 video.





                  share













                  Just to add.. I found the root cause of this. I switched my personal encodes from h.264 to H.EVC, no green thumbnails. Switched to 10-bit H.EVC encodes, green thumbnails. ffmpeg-thumbnailer it is then...



                  I'm using .mp4 container with 10-bit H.265, but I would not be surprised to find a lot of .mkv online are 10-bit encodes with a lot of the .mp4 containing more traditional 8-bit h.264 video.






                  share











                  share


                  share










                  answered 1 min ago









                  user153822user153822

                  762




                  762



























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