[FFmpeg-user] VC3 coding

Tim Nicholson tim.nicholson at bbc.co.uk
Tue Mar 29 16:17:38 CEST 2011


On 29/03/11 14:25, Tim Nicholson wrote:
> 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
> 

Interestingly removing '-flags +ildct' gives me a full frame picture,
but lacking in interlace and with ragged edges (the previous version was
interlaced correctly on the bit that was visible).

> 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?

-- 
Tim

http://www.bbc.co.uk/
This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated.
If you have received it in error, please delete it from your system.
Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately.
Please note that the BBC monitors e-mails sent or received.
Further communication will signify your consent to this.
					


More information about the ffmpeg-user mailing list