On Wed, 6 Feb 2013 18:35:03 +0100, Vittorio Giovara <[email protected]> wrote: > Hi, I'm trying to work on bug 378 ( > https://bugzilla.libav.org/show_bug.cgi?id=378) and have the h264 decoder > correctly interpret at least the right and bottom SPS cropping. > According to the documentation there coded_width and coded_height that > represent the bitstream size and width and height that represent the size > of what should be displayed. > So, as I got hinted on IRC, it should be possible to apply cropping at the > end of the decoding stage and so setting avcodeccontext width to > coded_width - right_cropping (and similarly for height). > > However if I'm to not exactly sure *where* this should be done in libav > code: if I do that in h264_decode_end() I get a correct size, but the image > is just stretched, not cropped, while if I put it in decode_slice() I > either get a corrupt image or just a full size picture or a lot of error > messages (regarding MB decoding or reinitialization). I've pasted my > current modifications with the cropping applied in h264_decode_end(). > > What I'm doing wrong? Can anyone give me a few more pointers?
Note that AVFrame also contains width and height. Those are set from the AVCodecContext values at get_buffer() time. Try modifying them as well. -- Anton Khirnov _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
