[FFmpeg-user] VC3 coding

betonpfeiler betonpfeiler at googlemail.com
Tue Mar 29 16:14:01 CEST 2011

Am 29.03.2011 15:25, schrieb Tim Nicholson:
> I have had VC3 coding running happily with:-
> ffmpeg -i<infile>  -s 1920x1080 -r 25 -vcodec dnxhd -b 120Mbps -f
> rawvideo -flags +ildct out.dnx
> Which I then mxf wrap and all is good.
> After updating ffmpeg to a very recent git I modified the line to
> ffmpeg -i<infile>  -s 1920x1080 -r 25 -vcodec dnxhd -b 120M -f rawvideo
> -flags +ildct out.dnx
> To reflect the API change for bit rate.
> Which processes happily. However after mxfwrapping and inspecting in
> Avid I only get the top half of the picture...
> Since the only change had been ffmpeg, and the minor tweak to the
> command line I believe that this must be due to some internal change in
> ffmpeg. The question is what?
Have you changed your Avid Distribution?
Seems to be the known Avid-DNxHD/VC3 Issue...

See the link below for some more information:


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