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• Electron, Chromium and ffmpeg licencing confusion, how to build electron with licence compatible ffmpeg [migrated]

  12 mars 2021, par Iamisti

  Intro :
Recently I'm working on an electron based application that is free to use but also has subscription based services.
It came to my attention that ffmpeg is shipped with electron, which has GPL/LGPL licence.

  


  My quetion is :

  


  

  • Am I legally able to still distribute the application and be licence-compliant with ffmpeg without owning any proper licence to it ? I thought chromium dealt with the licencing on this topic since so many applications nowadays are shipped with using electron and chromium under the hood.

  


  • How do I compile/build electron to make it licence compatible (in case its not ?)

  


  


  I did a lot of reseearch and I found out the followings :

  


  


  • ffmpeg is shipped with chromium, they built their own version of ffmpeg and it seems they also have licence for it. Although that might be that they just push the responsibility down on the software developer/company who distributes their application with chromium.
Chromium licence for ffmpeg : https://chromium.googlesource.com/chromium/third_party/ffmpeg/+/703e920bb75053bf6b87d41d198cbbfbce3fb7ad/LICENSE

    


  


  • Apparently ffmpeg has a checklist of how to be licence compliant. Does that mean if I do all these steps, I can still distribute the application and can legally use it ? Licence checklist for ffmpeg : http://ffmpeg.org/legal.html

    


  


  • checking out some popular electron applications like Discord, Figma, Slack, etc... they ALL have ffmpeg included cause of electron when you install them. I wonder how they made it legal ? I don't see any of these checklists done on any of these popular applications.

    


  


  


  I'm know very little regarding licences, so any help would be incredibly huge help for me.

  


• Remove audio streams from a .m2ts video file

  26 janvier 2019, par Nedrozak

  I have a video which has 3 audio streams in the file. The first one is English and the other ones are in different languages. How can I get rid of these audio streams without losing the quality of the video and the English stream.
  I think ffmpeg should be used but I don’t know how to do it.

  Video

  Bit rate mode : Variable
  Overall bit rate : 38.6 Mb/s
  Chroma subsampling : 4:2:0

  Audio

  Format : DTS-HD
  Compression mode : Lossless

• QuickTime plays separate audio tracks all at once with ffmpeg generated file

  23 mai 2022, par Justin Smith

  Let's say I have four files :

  


  

  • video.mp4

  


  • english.mp4

  


  • french.mp4

  


  • spanish.mp4

  


  


  I'm using the following ffmpeg command to create a single video file with multiple audio tracks for each language :

  


  ffmpeg -i video.mp4 -i english.mp4 -i spanish.mp4 -i french.mp4 \
-map 0:v -map 1:a -map 2:a -map 3:a \
-metadata:s:a:0 language=eng -metadata:s:a:0 title="English" \
-metadata:s:a:1 language=spa -metadata:s:a:1 title="Spanish" \
-metadata:s:a:2 language=fra -metadata:s:a:2 title="French" \
-disposition:a:0 default \
-c:v copy -c:a aac output.mp4


  


  The resulting video file output.mp4 works fine in VLC, but the audio tracks play all at once in QuickTime and the separate audio channels don't appear in the Languages menu. What am I doing wrong here ?