fcer.blogg.se - Ffmpeg options to remove dropped frames

The math behind it perfectly explained anycodings_ffmpeg in What is video timescale, timebase, or anycodings_ffmpeg timestamp in ffmpeg? not a big surprise for me, because every 6th frame was duplicate (5 good frames and 1 duplicate), so after 25 good frames there was also 5 duplicatesĮxcept the use of FRAME_RATE variable anycodings_ffmpeg the N/FRAME_RATE/TB is equal to the anycodings_ffmpeg example below from ffmpeg documentation anycodings_ffmpeg (source).The actual frame rate can be found out anycodings_ffmpeg if you open the media in.mkv in a media anycodings_ffmpeg player that lets you step one frame at anycodings_ffmpeg the time then count the steps needed to anycodings_ffmpeg advance the playback time for 1 second, anycodings_ffmpeg in my case it was 30 fps Stream #0:0: Video: h264 (Main), anycodings_ffmpeg yuvj420p(pc, bt709, progressive), anycodings_ffmpeg 1920x1080, SAR 1:1 DAR 16:9, 25 fps, 25 anycodings_ffmpeg tbr, 1k tbn, 50 tbc (default) so you have multimedia file with duplicate frames, it is good idea to make sure that the detected frame rate matches the actual oneįfprobe in.mkv will output the detected anycodings_ffmpeg FPS it may look like this.

decimate removes frames precisely, but it is useful only for periodically occurring duplicates.

it is not really supposed to work with mp4 container ( source), but I was using mkv so this limitation didn't apply on my case, but good to be aware of it.

you can tweak the detection with frac parameter, but that's extra work you may want to avoid if you can.

it uses heuristics so it may and will skip some duplicate frames.

mpdecimate is the standard recommendation I found all over SO and the internet, but I don't think it should be the first pick.

I also had this problem and Gyan's anycodings_ffmpeg excellent answer above got me started anycodings_ffmpeg but the result of it was desynchronized anycodings_ffmpeg audio so I had to explore more options: mpdecimate vs decimate filters