Hi,
I'll send some references and code later.
See e.g. here:
http://lists.mplayerhq.hu/pipermail/libav-user/2008-November/001618.html
and
http://lists.mplayerhq.hu/pipermail/libav-user/2008-June/000683.html
e.g.
img_convert vs swscale
---8<---
#if defined IPF_USE_SWSCALE
int err = sws_scale(ConvertToSaveCtx_,
InputFrame_->data, InputFrame_->linesize, 0, cc->height,
SaveFrame_->data, SaveFrame_->linesize);
#else
img_convert((AVPicture *)SaveFrame_, cc->pix_fmt,
(AVPicture *)InputFrame_, InputFrameFormat_,
cc->width, cc->height);
#endif
You have to create the swscale context earlier, e.g.
ConvertToSaveCtx_ = sws_getContext(ImageFormat_.getWidth(),
ImageFormat_.getHeight(), InputFrameFormat_,
ImageFormat_.getWidth(),
ImageFormat_.getHeight(), SaveFrameFormat_,
SWS_BILINEAR, NULL, NULL, NULL);
---8<---
One other thing that changed at some stage was this. The version might
have to be tuned:
#if LIBAVFORMAT_VERSION_INT > ((52<<16) + (1<<8) + 0)
url_fclose(FormatContext_->pb);
#else
url_fclose(&FormatContext_->pb);
#endif
---8<---
jp
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