On Fri, 26 Mar 2021 10:59:23 +0100, Peter White <peter.wh...@posteo.net> wrote:
>You can use ffprobe to find the keyframe timestamps: > >ffprobe -select_streams V:0 -show_frames -skip_frame nokey -show_entries >frame=best_effort_timestamp_time 2021-03-25ToastmastersClubAvond.mp4 > Interesting, I have wondered about why my ffmpeg cut engine does not give me clean cuts... I tested your command ona typical video file and found thta the output looks basically like this: [FRAME] best_effort_timestamp_time=3900.000000 [/FRAME] [FRAME] best_effort_timestamp_time=3905.000000 [/FRAME] [FRAME] best_effort_timestamp_time=3910.000000 [/FRAME] [FRAME] best_effort_timestamp_time=3915.000000 [/FRAME] It seems like there are "frames" at every 5 seconds. So on such videos is it impossible to cut say from time 2603 to 3401 and get a video of length 798 seconds? What does ffmpeg do? Does it skip to the closest frame border or does it include both the starting and ending frame so giving a video time of 805 seconds? Switching from the copy handler to something else makes ffmpeg work a lot harder and processing time goes from 5 seconds to 30 minutes or so.... -- Bo Berglund Developer in Sweden _______________________________________________ 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".
