[Ffmpeg-devel] [PATCH] mjpeg a support

[Michael Niedermayer]

Hi

On Thu, Oct 05, 2006 at 11:58:36AM +0200, Baptiste Coudurier wrote:
> Michael Niedermayer wrote:
> > Hi
> > 
> > On Thu, Oct 05, 2006 at 11:16:49AM +0200, Baptiste Coudurier wrote:
> >> Hi,
> >>
> >> This patch add support for creating 'mjpeg a' bitstream to fit into mov
> >> container. Quicktime sucessfully plays streams in either 420 or 422.
> > 
> > such container specific variants of codecs should be implemented with
> > bitstream filters not by changeing the encoder
> > such a bitstream filter is needed anyway to move mjpeg between mov
> > and non-mov containers
> > 
> > [...]
> 
> Well, APPn markers are standard. It seems you can copy mjpega stream
> from mov to avi without touching it. Decoder should skip APPn marker.

avi -> mov will not work, and for mov -> avi there would be useless
stuff in the stream = waste of space


> 
> Bitstream filter anyway would have to parse mjpeg stream to look for
> markers and move whole frame to insert 8 bytes. Don't you think that is
> really bloated ?

no i think mov & mjpeg a are bloated by requireing this, furthermore as
said such a bitstream filter is needed anyway for converting between
mov and non-mov

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In the past you could go to a library and read, borrow or copy any book
Today you'd get arrested for mere telling someone where the library is