[FFmpeg-user] VC3 coding

Tim Nicholson tim.nicholson at bbc.co.uk
Tue Mar 29 16:21:24 CEST 2011

On 29/03/11 15:14, betonpfeiler wrote:
> 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?

No, (still running 3.1.1 for initial testing) and it used to be fine. I
know they screwed things up in 3.5/4

> Seems to be the known Avid-DNxHD/VC3 Issue...
> See the link below for some more information:
> www.avid.com/static/resources/common/documents/*DNxHD*_Compliance_Issue_To_Licensees-1.doc

leads to 'Bad Request'

Will have a poke around Avid's web site though, thanks.


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