[FFmpeg-user] rgb8

[Paul B Mahol]

On Tue, May 30, 2023 at 8:32 PM Michael Koch <astroelectronic at t-online.de>
wrote:

> Am 30.05.2023 um 20:28 schrieb Reindl Harald:
> >
> >
> > Am 30.05.23 um 20:21 schrieb Michael Koch:
> >> ffmpeg -f dshow -video_size 1280x800 -framerate 5 -pixel_format rgb8
> >> -i video="ASI178MM Camera (ZWO Design)" -f rawvideo -frames 1 -y
> >> test.raw
> >>
> >> Then I did read this file, assuming that the pixel format is gray:
> >>
> >> ffmpeg -s 1280x800 -pixel_format gray -f rawvideo -i test.raw -y
> >> gray.png
> >>
> >> The result looks correct. Is it possible to do this in one command
> >> line? I mean just tell FFmpeg that the pixel format isn't rgb8 but
> >> gray, without making any modifications to the data?
> >
> > parameters before the input file are *input params*
> >
> > so why don't you change "-pixel_format rgb8" to "-pixel_format gray"
> > in the first command line when you say it works in the second one?
>
> When reading from the camera, the pixel format must be rgb8 because this
> is the only format supported by the DirectShow driver. All other pixel
> formats give error message.
>

Yes, looks like buggy code, the rgb8 is actually gray and not color.



>
> Michael
>
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