ffmpeg + libx264: use preset

I'm trying to encode raw movie using ffmpeg with libx264.
I use the following command:
ffmpeg -y -f rawvideo -s '3840x2160' -r 23.98 -i <my source> -pass 1 -x264-params 'bitrate=13500:fps=23.98:keyint=48:preset=veryfast:pass=1:threads=0' -vcodec libx264 -f mp4 -threads 0 <my destimation>

The problem is that I get the following error from ffmpeg:
Error parsing option 'preset = veryfast'

Does anybody know why I can't pass preset through -x264-params? I have already found that I can pass it through direct -preset:v option, but I'm still confused about -x264-params - is something broken in ffmpeg?

avtomaton

Posted 2015-06-08T09:44:13.577

Reputation: 111

Unrelated, but -video_size and -framerate should be used instead of -s and -r with the rawvideo demuxer (but I don't know if that actually makes a difference). Are you sure you want to use 23.98 instead of 24000/1001 or the alias ntsc-film? Why do you want to use -x264-params? Lastly, please show the complete console output from your command.

– llogan – 2015-06-08T17:04:54.673

Thanks for additional information.
About -s and -r - actually no difference, as I see.
About ntsc-film - thanks, simply didn't know about it.
And about -x264-params - it's mainly theoretical question now, I found a workaround with -preset:v veryfast, and now I'm simply interested why preset doesn't work in x264 params string.
Complete console output is rather long, and everything else seems OK (and the command produces correct file using default preset, as I can see - it simply ignores preset=veryfast). – avtomaton – 2015-06-08T17:45:57.233

ffmpeg + libx264: use preset

No answers