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

[Carl Eugen Hoyos]

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