[Ffmpeg-devel] pixel format names in swscale
Mon Aug 14 12:37:52 CEST 2006
I am working on modifying libswscale to internally use PIX_FMT_* names,
so that the dependency on img_format.h can be removed.
To do so, I need to convert each IMGFMT_ name in an equivalent PIX_FMT_
name; it seems to me that a lot of new PIX_FMT_ names will have to be
Here is a list of the equivalences between IMGFMT_ and PIX_FMT_ I built
looking at mplayer's code: is this correct?
every IMGFMT_RGB<x> format will be converted in PIX_FMT_RGB<x>
idem for IMGFMT_BGR<x>
(this will require to introduce some PIX_FMT_RGB* and PIX_FMT_BGR*
formats that are not currently defined in libavutil)
IMGFMT_YUY2 <---> PIX_FMT_YUYV422 (new format)
IMGFMT_UYVY <---> PIX_FMT_UYVY422
IMGFMT_NV12 <---> PIX_FMT_NV12 (new format)
IMGFMT_NV21 <---> PIX_FMT_NV21 (new format)
IMGFMT_Y800 <---> PIX_FMT_GRAY8
IMGFMT_YVU9 <---> PIX_FMT_YVU410P (new format)
IMGFMT_IF09 <---> PIX_FMT_YUV410P
IMGFMT_YV12 <---> PIX_FMT_YVU420P (new format)
IMGFMT_I420 <---> PIX_FMT_YUV420P
IMGFMT_411P <---> PIX_FMT_YUV411P
IMGFMT_422P <---> PIX_FMT_YUV422P
IMGFMT_444P <---> PIX_FMT_YUV444P
Also, how can I convert IMGFMT_Y8 and IMGFMT_IYUV?
Moreover, I see that there are an IMGFMT_BGR1 and an IMGFMT_RGB1
format... If I understand the naming well, they should be "BGR, 1 bit
per pixel" and "RGB, 1 bit per pixel". But I do not understand what 1
bit per pixel represents in the RGB or BGR space (is it B/W? If yes,
what's the difference between these 2 formats?).
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