On 2021-02-27 01:45, Mark Filipak (ffmpeg) wrote:
I thought that 'fps' just changes the 'frame_rate_code' metadata.
Not at all. Read [1] for part of the story of what the `fps` video filter actually does: "Convert the video to specified constant frame rate by duplicating or dropping frames as necessary.…"
Read [2] for more of the story: "Make a new video from the frames and presentation time stamps (PTSs) of the input. The new video has a specified constant frame rate, and new PTSs. It generally keeps frames from the old video, but might repeat or drop some frames. You can choose the method for rounding from input PTS to output PTS. This affects which frames fps keeps, repeats, or drops.…"
[1] http://ffmpeg.org/ffmpeg-all.html#fps-1 [2] http://blog.jdlh.com/en/2020/04/30/ffmpeg-fps-documented/ Best regards, —Jim DeLaHunt _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
