[FFmpeg-user] overlay filter question

Stefano Sabatini stefasab at gmail.com
Thu Aug 9 08:38:54 CEST 2012

On date Tuesday 2012-08-07 16:54:00 -0600, Roger Pack encoded:
> > [AVFilterGraph @ 0326BAE0] No such filter:
> > 'overlay=10:H-h-10,overlay=W-w-10:H-h-10'
> > Error configuring filters.
> >
> > Did I miss something?
> Appears the actual problem was that the example docs use single
> quotes, which don't work in the windows command line. Perhaps they
> could all be changed to double quotes at some point, to prevent
> confused people like myself? :)

That's tricky, indeed I think that many users use ffmpeg through the
MinGW bash shell, which supports that kind of escaping, don't know
about cmd.com.
ffmpeg-user random tip #12
One minute of video noise with ffmpeg:
ffmpeg -t 60 -s qcif -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/urandom \
    -y noise.mpeg

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