ffmpegthumbnailer fails to generate audio file cover thumbnail

[danmcgoo]

Hello,

I upgraded recently from ubuntu 16.04 to ubuntu 18.04.
Previously, I used ffmpegthumbnailer to generate thumbnails for audio file covers.

Since the upgrade, ffmpegthumbnailer fails to generate those thumbnails.
I am not sure if the issue comes from ffmpegthumbnailer itself or from elsewhere.

When trying with something like this:
ffmpegthumbnailer -i audio.mp4 -o test.png
I get the following error message:
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x564e9fdf6fa0] stream 0, timescale not set
[swscaler @ 0x564e9fe7e720] deprecated pixel format used, make sure you did set range correctly
Error: decodeVideoFrame() failed: frame not finished

And the output file is empty.

Best Regards,

[dirkvdb]

Can you provide a sample that fails?

[danmcgoo]

Well, due to copyright issues I will not provide an audio file here.
However, I can tell you how to make on yourself.
You can use youtube-dl on a soundcloud url, like this:
youtube-dl "soundcould-url" --embed-thumbnail

[Coeur-Noir]

Same « problem » here on ubuntuBudgie 20.04 with Nemo 4.4.2

django@ASGARD:~$ dpkg -l | grep thumbnail
ii  ffmpegthumbnailer                     2.1.1-0.2build2                     amd64        fast and lightweight video thumbnailer
ii  libffmpegthumbnailer4v5               2.1.1-0.2build2                     amd64        shared library for ffmpegthumbnailer
ii  libgdk-pixbuf2.0-bin                  2.40.0+dfsg-3                       amd64        GDK Pixbuf library (thumbnailer)
django@ASGARD:~$

And

django@ASGARD:~$ cat /usr/share/thumbnailers/ffmpegthumbnailer.thumbnailer 
[Thumbnailer Entry]
TryExec=ffmpegthumbnailer
Exec=ffmpegthumbnailer -i %i -o %o -s %s -f
MimeType=video/jpeg;video/mp4;video/mpeg;video/quicktime;video/x-ms-asf;video/x-ms-wm;video/x-ms-wmv;video/x-msvideo;video/x-flv;video/x-matroska;video/webm;video/mp2t;audio/flac;audio/mpeg
django@ASGARD:~$ 

For reference :
https://bugs.launchpad.net/ubuntu/+source/ffmpegthumbnailer/+bug/1882471