From reading about the GPL I have concluded that is not possible to publish an app on the App Store using a library like ffmpeg.
Is there another library than ffmpeg for converting .flv to audio files that is not under GPL license?
In terms of speed and quality, Handbrake and FFmpeg may be about the same if you use the same output settings. Because in most cases, Handbrake uses the same encoders that FFmpeg uses. If you choose to copy and wrap streams from one container to another by using FFmpeg, the output quality can keep the original.
FFmpeg is a free and open-source software project consisting of a suite of libraries and programs for handling video, audio, and other multimedia files and streams.
why does this come up so often? there is information on the ffmpeg site explaining how to deploy ffmpeg apps on iOS and the license ramifications.
https://ffmpeg.org/trac/ffmpeg/ticket/1229
As long as you use the lgpl/gpl version of ffmpeg you should be fine.
It was more of a grey area in 2009 when I first helped port first ffmpeg apps but now there are countless apps in the appstore.
Its important that you abide by the LGPL license other than that you should be fine.
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