On Tue, 8 Nov 2005, E.Chalaron wrote:
> Libquicktime is supporting 8 bit Packed YUV 4:2:2 (yuv2) in ether encoding
> and
> decoding.
It also supports 'v210' (10 bit packed 4:2:2) :)
> I have been playing a bit with yuv2lav -f q but how can I make sure that my
> frames are saved in this YUV 422 rather than 420 (PAL).
You can't at the present time.
The general "YUV" handling in the *lav* tools is incomplete,
inconsistent, or incorrect (depending what section of code one is
looking at ;)).
Some time ago I asked if there was any interest in fixing and
generalizing the "YUV" handling. The response was underwhelming
(i.e. no response at all as I recall).
What I do is use a local "work of art" called "qt2raw" that reads
a 2vuy (or yuv2) quicktime file and emits planar 4:2:2 - a yuv4mpeg2
header is then placed on the data using 'yuv4mpeg'. I also have
another little utility 'y4mtoqt' that can take YUV4MPEG2 4:2:2
data and create a 2vuy Quicktime file (no audio though - haven't gotten
that far ;)).
If there's any interest I can place those utilities in mjpegtools.
Then if others want to help complete them that'd be nice otherwise
that'll wait until I find a new supplier of copious free time :)
Cheers,
Steven Schultz
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