[FFmpeg-user] DVB H264 chunk transcoding => merging in MP4 => out of sync
ffmpeg at me.com
ffmpeg at me.com
Wed Mar 29 13:30:53 EEST 2017
we tested also under Chrome (v57, MacOS), Chrome Android (current Version) and Windows 10 with the new media player. We did not recognize the sync problems with the test-movie.
Conclusion: problems just under iOS and Quicktime (MacOS, Windows version of Quicktime probably too).
> Am 25.03.2017 um 14:39 schrieb ffmpeg at me.com:
> Confirmed: video still fails in Quicktime. WMP under Win 8.1 looks after quick test fine. Test under Win 10 will be done soon.
> Tested on iOS (current 10.2, iPhone 6s) the same video. Also here the same delay is visible (playback on iOS is based generally on Quicktime).
> Demo is attached (screen-record, audio source speakers of the system - not perfect but does the trick for test):
> www.keepinmind.info/download/error.mov <http://www.keepinmind.info/download/error.mov>
>> Am 24.03.2017 um 20:48 schrieb Carl Eugen Hoyos <ceffmpeg at gmail.com>:
>> 2017-03-15 13:03 GMT+01:00 <ffmpeg at me.com>:
>>> ffmpeg -f concat -safe 0 -i files.txt -y -metadata creation_time=now -c:v copy -c:a copy
>>> -fflags +genpts -movflags faststart -use_editlist 0 -f mp4 tvexport.mp4
>> I have removed the absolute paths from files.txt (you do agree they make
>> testing impossible?) and have tested the following command line:
>> $ ffmpeg -f concat -i files.txt -c copy out.mp4
>> (The other options you use seem superfluous or make little sense)
>> The output file plays fine with MPlayer, vlc and ffplay (three different
>> demuxers). Are you able to test with WMP?
>> Can you confirm that this file still fails with QT?
>> Carl Eugen
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