[Libav-user] JPEG YUV->RGB
ebersbac at hs-mittweida.de
Fri May 13 07:58:36 CEST 2011
Am 12.5.2011 16:09, schrieb Dmitriy K:
> Is there any examples of this conversion?
> I've found YUV_TO_RGB1 and YUV_TO_RGB2 in libavcodec/colorspace.h in documentation, but there is no this file in my system.
The right library is swscale, which is part of libav. For sample code
have a look at output-example.c (in the path of libav). To convert the
pixelformat first the source and destination format have to be
img_convert_ctx = sws_getContext(c->width, c->height,
sws_flags, NULL, NULL, NULL);
look at the documentation for the variables:
for every picture you have to converted the following function is used:
sws_scale(img_convert_ctx, tmp_picture->data, tmp_picture->linesize, 0,
c->height, picture->data, picture->linesize);
All things that have to do with integer variables, overflows and other
stuff are handled by the library, so it works very well.
More information about the Libav-user