On 9 May 2017, at 15:21, Carl Eugen Hoyos <ceffm...@gmail.com> wrote: >> Do you not see the same behaviour? > No, unfortunately not.
Can I ask - are you playing back your encoded file on macOS in either Quicktime Player 7.x or Quicktime Player 10.x? I don’t believe you will see this unless you are using a Quicktime based decoder. > If you say audio is off by one frame, I am not the right person > to talk to because I have no idea how to reproduce. Sorry if this is not correct way to share a file, I’ll remove and re-share if asked of course: https://www.dropbox.com/s/qz5c64rk6l8415o/SyncTest24p.mov?dl=0 <https://www.dropbox.com/s/qz5c64rk6l8415o/SyncTest24p.mov?dl=0> This is a simple 2 second sync test Quicktime file (DNx115, 24fps with PCM audio) with a sync pop on the head and tail frame. If you have time, please could you try to encode this as follows and playback in a Quicktime based player. ffmpeg -i SyncTest24p.mov -c:v libx264 -pix_fmt yuv420p -movflags faststart -c:a aac -b:a 128k ffmpeg.mov - Do you hear a sync pop on the first frame of the encode when played back in Quicktime based player? - Does the tail sync pop sound on frame :23 or frame :22? > If the effect can be multiplied by encoding several times with > FFmpeg, things would of course be different: Is that the case? No, it does not get any worse by encoding it many times in a row. Many thanks for your continued help, its hugely appreciated. Mark _______________________________________________ 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".
