Hi All,
I am trying to convert from YUV420P to RGB24 with /sws_scale/. The
source video is from an AVI file, via /avcodec_decode_video2()/. I get
a segmentation fault every time, and am at a complete loss. If anyone
can suggest anything I would be greatly appreciative. I have followed
various tutorials and looked at many different examples. I am sure it's
a simple mistake I'm making. My /sws_getContext()/ Call is as follows:
swsC = sws_getContext( pCodecCtx->width, // Source width
pCodecCtx->height, //
Source height
//pFrame->pict_type, //
Source format (maybe PIX_FMT_YUV420P)
pCodecCtx->pix_fmt, //
Source format (maybe PIX_FMT_YUV420P)
pCodecCtx->width, //
Dest width
pCodecCtx->height, //
Dest height
PIX_FMT_RGB24, //
Dest format
SWS_FAST_BILINEAR+SWS_PRINT_INFO, // Transform Type (choose from
SWS FLAGS)
NULL, NULL, NULL); //
Filters & Pointer Setup (NULL chooses defaults for last 3 options)
After checking /swsC/ this is used directly in the /sws_scale()/ call,
as follows:
sws_scale( swsC, // SwsContext
- Setup for scaling
(const uint8_t* const*) pFrame->data,
// Source frame data (cast to required type)
pFrame->linesize,
// Source frame stride
0,
// Source frame slice width (raster, so no width slicing)
pCodecCtx->height,
// Source frame slice height
nFrame->data,
// Dest frame data
nFrame->linesize);
// Dest frame stride
In the above line(s), I get the SEG fault - every time.
Any pointers (no pun intended) would be greatly received. Full Program
Listing, here: http://www.ee.ucl.ac.uk/~zceed42/gs.html
<http://www.ee.ucl.ac.uk/%7Ezceed42/gs.html>
Thanks, Regards,
George Smart.
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