[FFmpeg-user] ffserver ignores filters

Stefano Sabatini stefasab at gmail.com
Fri Jan 20 00:02:37 CET 2012

On date Thursday 2012-01-19 09:13:42 -0800, Mike Carambat encoded:
> Using latest build of ffmpeg/ffserver recompiled for Ubuntu 10.5. 
> For some reason when I use ffmpeg to stream an mjpeg feed to a
> stream.ffm file and use -vf with any filter, the filter is ignored
> upon relay at the ffserver. The streaming feed out of ffserver is
> the original unfiltered source.

>  typing in ffserver -filters shows no filters listed, although they
>  are listed and working in ffmpeg if I write to a file.

yes, indeed ffserver never initialize filters (same for ffprobe).

> Is this correct behavior? So far, the only thing I can seemingly
> adjust at ffserver is the video size and frame rate. Is there anyway
> to get libavfilters to work with ffserver?

ffserver doesn't support filters, and yes that would be a nice
ffmpeg-user random tip #11
One minute of video silence with ffmpeg:
ffmpeg -t 60 -s qcif -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/zero \
    -y silence.mpeg

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