[FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?
ffmpeg at me.com
ffmpeg at me.com
Fri Jun 16 11:17:10 EEST 2017
I agree with Mark here.
Followed the issue now for a while and opened a similar (not went into this deep technical level) issue some time ago.
I guess it should be marked as a bug and - if possible - should be fixed.
> Am 9. Jun 2017 um 10:44 schrieb Mark Burton <mwjburton at gmail.com>:
> I appreciate I don't fully grasp the complexities or know the full story here, but do you not think its fair to say this should be considered a major ffmpeg bug or issue? It seems clear to me, and others, that the current .mov muxer produces a file which is incompatible with Quicktime itself. AAC priming in this container does not follow as advised and that appears to be the main reason its breaks when decoded.
> Going back to changing the file manually (after using aresample and asetpts filters), I can get a file which decodes perfectly in Quicktime and VLC by just changing the single value for duration in the sound edit list to match the video track duration:
> trak - Track
> edts - Edits
> elst - Edit List
> 'segment duration’
> This file also imports perfectly into Avid Media Composer, a first. The movie header still shows an overlong duration, but that does not appear to affect playback. Its really just a hack though.
> Surely it would be preferable to have a permanent solution to this which did not require the use of multiple audio filters and manual hacks to produce a working file with AAC for Quicktime.
> Many thanks for your patience with this, I know I’ve been banging on this door for a few months, so I apologise for clogging up your inboxes. Its not my intention to be accusatory, I’m genuinely trying to help improve the tool as best I can. A re-engagement from the experts here would be hugely appreciated and I will do all I can to help.
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