[FFmpeg-user] grayscale video streaming in ffmpeg

Marc Elliott elliott2w1 at gmail.com
Wed Sep 12 18:43:24 CEST 2012

Ok, I get what you're saying.  I don't have to use .swf.  I can use
any type of video output.  How do you take advantaget of the -pix_fmt
flag in ffmpeg in order to specify the pixel formats GRAY8, GRAY16LE,
and GRAY16BE?  There has to be someway to implement these commands,

Thanks again for your input.

On 9/12/12, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Carl Eugen Hoyos <cehoyos <at> ag.or.at> writes:
>> Marc Elliott <elliott2w1 <at> gmail.com> writes:
>> > 3 [volta]/home/student/elliott> ffmpeg/ffmpeg -qmin 2 -qmax 31
>> > -s 320x240 -f rawvideo -flags gray -pix_fmt:output gray -an
>> > -i testvideo_1000f.raw output.swf
>> > I am fairly new to FFMPEG and I am afraid I am using either the wrong
>> > syntax or the wrong parameters in my command line. For some reason,
>> > the format of the output is yuv420p.
>> The default video codec for swf is flv1 (Sorenson Video) and
>> this codec only support yuv420p. You can try -vcodec mjpeg but
>> this seems to have problems (I don't know if they are expected).
> I fixed muxing mjpeg in swf, but that does not help with your
> original problem: There is no video codec supported in swf
> that allows to encode gray - you can only set u and v to the
> appropriate values.
> Carl Eugen
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