Hi Bill, Just fixed this in SVN trunk, see https://trac.pjsip.org/repos/ticket/1769. Thank you for the report. BR, nanang On Mon, May 19, 2014 at 11:15 PM, Bill Gardner <billg at wavearts.com> wrote: > I'd like to report a bug in how PJSIP 2.2 allocates H264 video decode > buffer. I discovered the issue when connecting to another endpoint sending > 4CIF format video (704x576), using H264. This resulted in no video decoding > and the following repeated errors in log: > > 10:02:34.142 vstdec0298F6EC Error: not enough buffer for decoded frame > (supplied=589824, required=608256) > 10:02:34.169 vstdec0298F6EC codec decode() error: Size is too short > (PJ_ETOOSMALL) [err:70019] > > PJSIP uses the largest possible frame supported by the H264 profile level > which also has 3/2 aspect ratio, in multiples of 16 pixels (the H264 > macroblock size). See function find_highest_res() in vid_codec_util.c. So > at level 3.0 PJSIP allocates a 768x512 frame, exactly 3/2 aspect ratio. > PJSIP can resize dynamically, but only to smaller frame sizes. So when 4CIF > comes in at 704x576 (which is a slightly larger image but still supported > by level 3.0) PJSIP can't decode the video and emits error messages. > Fortunately an easy workaround is to set the profile level to 3.1 and then > PJSIP allocates a pretty huge frame for decoding. > > It seems the proper fix is to allocate a frame buffer large enough to hold > the maximum number of macroblocks for the profile level, without concern > for accurate aspect ratio. I realize now that 4CIF is 1620 macroblocks > which is the maximum for profile level 3.0, and 704x576 is the closest to > 3/2 ratio you can get using 1620 macroblocks. So maybe these max sizes need > to be baked in? > > Bill > > > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140604/5fc1f9c9/attachment.html>
