Re: [FFmpeg-user] Is there a reason the default vsync for the mp4 muxer is not 2?
2018-05-24 7:18 GMT+02:00, André Hänsel: >>2018-05-23 16:24 GMT+02:00, André Hänsel : > I added -vsync 2 to the command line options and I got a file > that has roughly the same number of frames as the input. >>> But it is - unfortunately! - an invalid file. >>> >>> Is there a ticket/additional info about what is/can be invalid in this >>> file? >> >>I don't remember atm, sorry, git blame may help you. > > Hm, I found > https://github.com/FFmpeg/FFmpeg/commit/91360ce6 Yes, this is the relevant commit. Feel free to check the ffmbc sources (do not take patches from it though, ffmbc is not lgpl!). Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Is there a reason the default vsync for the mp4 muxer is not 2?
>2018-05-23 16:24 GMT+02:00, André Hänsel: I added -vsync 2 to the command line options and I got a file that has roughly the same number of frames as the input. >> >>> But it is - unfortunately! - an invalid file. >> >> Is there a ticket/additional info about what is/can be invalid in this file? > >I don't remember atm, sorry, git blame may help you. Hm, I found https://github.com/FFmpeg/FFmpeg/commit/91360ce61d00bb20429fb41857abebf50a5c6b1d. It says timespamps must start at 0 and that "causes sync problems" - is that about audio? I don't have any audio in my files, maybe that is why I'm not experiencing problems? >> With -enc_time_base -1 -vsync 2 my output files seem just fine. > >Do you have access to an isom stream analyzer? >If not, this discussion won't be very fruitful, sorry;-( I usually use http://mp4parser.com/, which shows hex, which I cross reference with https://developer.apple.com/library/content/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Is there a reason the default vsync for the mp4 muxer is not 2?
>> I added -vsync 2 to the command line options and I got a file >> that has roughly the same number of frames as the input. > But it is - unfortunately! - an invalid file. Is there a ticket/additional info about what is/can be invalid in this file? With -enc_time_base -1 -vsync 2 my output files seem just fine. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".