GNOME Bugzilla – Bug 711497
rtpvp8pay: Compatibility issue with linphone due to always sending a picture id
Last modified: 2013-11-05 16:29:13 UTC
The RTP stream generated by GStreamer is not compatible with old decoder implementation. I noiticedthis issue with the soft phone I’m using(Linphphone), it seems its vp8 decoder with name "WebM Project VP8 Decoder v0.9.7-pl” is not compatible with your encoder (I got gstreamer-1.2.pkg, you provide us) And the only information I got was: vpx_codec_decode failed : 5 Bitstream not supported by this decoder ((null)) People develop webrtc2sip server were having the same issue, I’ve found some threads about this issue https://groups.google.com/forum/#!msg/discuss-webrtc/xCxqzxopsDM/jIKtkA_StOgJ https://groups.google.com/forum/#!topic/doubango/OH-nOn5w-ng They solved disabling extension in vp8 encoding #define TDAV_VP8_DISABLE_EXTENSION in http://doubango.googlecode.com/svn-history/r796/branches/2.0/doubango/tinyDAV/src/codecs/vpx/tdav_codec_vp8.c This is the header of the first packet I sent to the softphone 90:80:7c:10:32:00:9d:01:2a:a0:00:78:00:00:47:08:85:85:88:85:84:88… This issue is in rtpvp8pay due to the default PICTURE MODE used, it is not supported in the early version of vp8. #define DEFAULT_PICTURE_ID_MODE VP8_PAY_PICTURE_ID_7BITS I solved the issue recompiling with this default value, #define DEFAULT_PICTURE_ID_MODE VP8_PAY_NO_PICTURE_ID My suggestion is to change the default one value with VP8_PAY_NO_PICTURE_ID more conservative configuration, then let change the value programmatically.
commit 111982de2811c2c5bfb15d2d89322d9597e822c1 Author: Sebastian Dröge <sebastian@centricular.com> Date: Tue Nov 5 17:26:49 2013 +0100 rtpvp8pay: Make Picture ID mode configurable and default to no picture ID Some implementations (linphone) only support no picture at all in the stream and will fail if one is provided. https://bugzilla.gnome.org/show_bug.cgi?id=711497