-----Mensaje original----- De: [email protected] [mailto:[email protected]] En nombre de Mike Scheutzow Enviado el: sábado, 21 de agosto de 2010 14:37 Para: Libav* user questions and discussions Asunto: Re: [libav-user] RE : RE : Conversion yuvj420P to RGB24
Candice Seenyen wrote: > THanks for your input, but it actually doesn't work. I am using the latest > version of ffmpeg where YUVJ420P is deprecated, so that could be the > problem. No idea. I'll look into it. > Please don't top-post in this list. Looking at the FFmpeg source code, in pixfmt.h I see the "deprecated" comment you are talking about. But I think it is not completely accurate. PIX_FMT_YUVJ420P might be deprecated for libavcodec, but it's not deprecated for libswscale. For libavcodec, the new approach is to use PIX_FMT_YUV420P together with AVCOL_RANGE_JPEG. This change means that if you want your code to handle full-range pixels, you have to add new lines of code that check AVCodecContext->color_range, then pass the correct PIX_FMT_* value to sws_getContext(). I didn't create a test case, but looking at the source code it appears that libswscale does the right thing with PIX_FMT_YUVJ420P. Switching topics, an all green output from YUV->RGB conversion usually means that the input YUV buffer was all zeros. You should use a debugger to confirm that you see non-zero data in the input Y plane buffer. For debugging, you might also try --disable-optimizations and --disable-asm when you configure FFmpeg. This will slow down execution a lot, but might help you figure out where the problem is. -- Mike Scheutzow _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user ---------------------------------------------------------------------------- ---------------------------------------------------- Thanks a lot for your help. I've been able to solve my problem. _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
