On Tue, 7 Feb 2023 22:00:35 +0300 Alexander Gribanov <[email protected]> wrote:
> Hello! > > Here is a downloaded Facebook Livestream video which I'm trying to > process: > https://drive.google.com/file/d/1mVkQbzVSzhOlQbT2mB1J2yvPFV5kl5Dq/view?usp=share_link > > I can play it correctly in MPC-HC Media Player Classic, but when I > try to add this video to Adobe Premiere 2022, there around 3:00:00 > position audio is about 40 seconds ahead of video... > > I tried to remux and re-encode this video using ffmpeg, it showed a > lot of warnings like this: > [aac @ 000001c1bfe68e40] env_facs_q 254 is invalid > > I tried different options like "-vsync cfr", "-fps_mode drop" and some > other stuff which I don't remember already, but nothing helped :( In > MPC-HC it was ok, but in Adobe Premiere still 40-seconds a/v unsync. > > I assume that the problem is with timestamps on the audio track. > > I would like to make using ffmpeg just a simple cfr video 29.97 fps / > audio 48kHz without any timestamp gaps and offsets. > > Could anybody please help me to understand how to analyze and > diagnose such problems in such videos to be sure what the exact > problem is? > > Could You please help me find the solution (i.e. options or > subcommands to ffmpeg). > > Thank You very much in advance :) Maybe re-encode it with constant framerate using 'framerate' filter? ffmpeg -i in.mp4 -vf framerate=fps=29.97 -c:a copy -c:v libx264 -b:v 800k out.mp4 _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
