[Ffmpeg-devel] Re: [PATCH] dv pixel format encoding fix

Baptiste COUDURIER baptiste.coudurier
Thu Mar 9 22:39:10 CET 2006


Michael Niedermayer wrote:
> iam not exactly sure what you propose but its probably not even remotely
> acceptable
> ok, let me explain how it should be done, but warning my knowledge about dv
> is not as good as it should be so maybe iam missing some details ...
> what dv in mov is, is a sick double layer format, its the output of the
> dv muxer put into mov, the only sane way to generate this if we really have
> to support it and IMHO it would be better if we simply say "NO" to this mess
> is to feed the seperate audio and video dv streams into the dv muxer and then
> the combined muxed dv stream into the mov muxer, how to implement this
> cleanly is not exactly obvious, one way would be to call the dv muxer from
> the mov muxer to combine the streams

It basically works the way it is atm with Quicktime player and FCP,
thanks to the fourcc I guess.

Goal here is to make ffmpeg detect colorspace correctly. I don't know
the layout of the frame out of dv encoder, but setting correctly apt
will do the trick. There is an hack for 422 colorspace already.

Is apt flag in the frame ? I guess yes, since frame size is correct DV
frame size, and since 422 colorspace if properly detected, I guess
headers are somewhat correct.

Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
SMARTJOG S.A.                                    http://www.smartjog.com
Key fingerprint                 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA
Phone: +33 1 49966312

More information about the ffmpeg-devel mailing list