[Ffmpeg-devel] [PATCH] mov dnxhd muxing

Michael Niedermayer michaelni
Thu Mar 22 13:32:15 CET 2007


On Wed, Mar 21, 2007 at 02:49:14PM +0100, Baptiste Coudurier wrote:
> Hi
> $subj.
> Can I use sub_id and set it to cid in dnxhd decoder ?

no as this breaks stream copy from every container with dnxhd to mov

you can set it in a dnxhd parser if you like as long as nothing breaks
by doing so compared to having the mov muxer parse the dnxhd header

> Also, avid codecs need those specific mov atoms for some codecs ffmpeg
> already supports, what would be the good way to write them ?
> Example: you can mux dv into mov using "AVdv" tag, then avid codecs will
> decode stream perfectly if those atoms are present, though quicktime
> wont decode it by default.
> Quicktime has a native decoder for dv25 so use native one, but for dv50,
>   there is no decoder. We can use Final cut one, which use his own
> codec/own tag but only useable when fcp is installed, or Avid ones which
> are freely available.
> So what muxing by default, and how to switch ? codec_tag ("stsd" tag) is
> a solution, but people will have to know which tag to use.

i dont think codec_tag should be (mis)used for this, but rather a new muxer
similar to the one for psp should be added to movenc.c

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In a rich man's house there is no place to spit but his face.
-- Diogenes of Sinope
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