[FFmpeg-user] Unsupported codec with id 0 for input stream 1

[Zsolt]

What's the reason against "-r" as input. I was thinking of  using it with
rgb/30fps screencap sources, which are encoded to variable frame-rate
otherwise. Bad idea?


2014-03-02 19:34 GMT+01:00 Carl Eugen Hoyos <cehoyos at ag.or.at>:

> Eugene Gekhter <egekhter <at> pixcel.com> writes:
>
> > > What is "-r 16" supposed to mean?
>
> > -r 16 I thought is the avisynth equivalent of
> > ffvideosource(clip).assume_fps(16)
>
> Please don't use the input option -r.
>
> > I am attempting to have the prores file playback
> > at the correct speed, i.e. 16 fps instead of 24 fps,
> > without changing the actual number of frames in the
> > entire file
>
> Use the setpts filter:
> https://ffmpeg.org/ffmpeg-filters.html#setpts_002c-asetpts
>
> > and ultimately, without re-encoding the video, even
> > though ProRes is arguably a lossless codec, I feel
>
> ProRes is definitely not lossless.
>
> > more comfortable using the -vcodec copy command
> > whenever possible.
>
> -r (the output option) may work, I did not test.
>
> Carl Eugen
>
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