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I would like to know if there are any ways to add a custom thumbnail to a .webm file using FFmpeg.

I have tried the following commands using FFmpeg version : 4.2.7-0ubuntu0.1 (tried for both .png and .jpg images):

ffmpeg -i 'input.webm' -i 'thumbnail.jpg' -map 1 -map 0 -c copy -disposition:0 attached_pic 'output.webm'

It results in an error:

[webm @ 0x557ada774f80] Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

Seems like the above command only works for .mp4 files.

Are there any workarounds for .webm files?

Suggestions for achieving the same using other tools are welcome.

Sai Chaithanya
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    Duplicate. See [this post](https://stackoverflow.com/questions/65705833/does-webm-support-cover-art) – kesh Aug 23 '22 at 14:17

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