[FFmpeg-user] ffmpeg create wrong time information
Bouke / Videotoolshed
bouke at videotoolshed.com
Wed Dec 22 11:47:47 EET 2021
> On 21 Dec 2021, at 19:37, Cecil Westerhof via ffmpeg-user <ffmpeg-user at ffmpeg.org> wrote:
> Cecil Westerhof via ffmpeg-user <ffmpeg-user at ffmpeg.org> writes:
> After some experiments I solved it by putting -ss and -to behind -i
> and not forgetting to alter the between values.
> But this takes about a third more time.
> Is there be a better solution?
> I am now using:
> ffmpeg -y \
> -i input.mp4 \
> -ss 00:26:05 \
> -to 00:44:04 \
> -vf "
> drawbox=enable='between(t, 1565, 1566.6)':
> color = black :
> w = in_w :
> h = in_h :
> thickness = fill
> " \
> -acodec copy \
> -vcodec libx264 \
> -crf 23 \
> -preset veryfast \
I think you are inserting black, not overlaying (blanking) the video. Try -vf overlay.
With -ss before input, it will do a faster search, you might have to do a bit of math on the enable= range, but that will become very obvious with a small test.
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