[FFmpeg-devel] [PATCH] y41p encoder and decoder
Paul B Mahol
onemda at gmail.com
Sun Jan 1 12:28:16 CET 2012
On 12/31/11, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Paul B Mahol <onemda <at> gmail.com> writes:
>> y41p is a packed 12-bit 4:1:1 YUV format used by Brooktree.
> (Fixes issue 1123 / ticket 102)
> Just two nits:
>> + avctx->pix_fmt = PIX_FMT_YUV411P;
>> + avctx->bits_per_raw_sample = 12;
> Isn't 12 the default anyway?
>> + .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1
> Imo, this should be "Uncompressed packed YUV 4:1:1"
> (But please feel free to ignore)
> Is encoding odd widths allowed?
Mplayer with bt411 driver crashes when trying to play Y41P muxed in
avi with ffmpeg. (Even if I use -vcodec copy).
Another issue is that frame(for the only sample we have) is apparently
vertically flipped, this is related to
http://roundup.libav.org/issue2395. (Will try mentioned hack).
So probably encoder should not do vertical flip, and decoder is busted
until there is way to find out if biHeight is positive or negative.
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