[Libav-user] H264 decoding problem

Ivan Ushakov ivan.ushakov at gmail.com
Sun Aug 19 09:01:34 CEST 2012


Hello.

I'm using libav for decoding h264 in my iOS application. This application
also uses Live555 for RTSP stuff.

I use following link for testing: *rtsp*://*184.72*
.239.149/vod/mp4:BigBuckBunny_175k.mov

When I get data from Live555 MediaSink I add 3 bytes (0x00 0x00 0x01) at
the beginning and trying to decode it with libav.
I got following errors:

2012-08-19 10:21:55.008 RTPlayer[333:12f03] Unknown NAL code: 28 (2350 bits)
2012-08-19 10:21:55.010 RTPlayer[333:12f03] no frame!
2012-08-19 10:21:55.108 RTPlayer[333:12f03] non-existing PPS 0 referenced
2012-08-19 10:21:55.109 RTPlayer[333:12f03] decode_slice_header error
2012-08-19 10:21:55.110 RTPlayer[333:12f03] no frame!
2012-08-19 10:21:55.110 RTPlayer[333:12f03] non-existing PPS 0 referenced
2012-08-19 10:21:55.111 RTPlayer[333:12f03] decode_slice_header error
2012-08-19 10:21:55.112 RTPlayer[333:12f03] no frame!

...

2012-08-19 10:21:56.572 RTPlayer[333:12f03] non-existing PPS 0 referenced
2012-08-19 10:21:56.572 RTPlayer[333:12f03] decode_slice_header error
2012-08-19 10:21:56.573 RTPlayer[333:12f03] Unknown NAL code: 29 (191 bits)
2012-08-19 10:21:56.574 RTPlayer[333:12f03] no frame!
2012-08-19 10:21:56.672 RTPlayer[333:12f03] non-existing PPS 0 referenced
2012-08-19 10:21:56.673 RTPlayer[333:12f03] decode_slice_header error
2012-08-19 10:21:56.674 RTPlayer[333:12f03] no frame!
2012-08-19 10:21:56.675 RTPlayer[333:12f03] non-existing PPS 0 referenced
2012-08-19 10:21:56.676 RTPlayer[333:12f03] decode_slice_header error
2012-08-19 10:21:56.677 RTPlayer[333:12f03] Partitioned H.264 support is
incomplete
2012-08-19 10:21:56.678 RTPlayer[333:12f03] non-existing PPS 0 referenced
2012-08-19 10:21:56.679 RTPlayer[333:12f03] decode_slice_header error
2012-08-19 10:21:56.679 RTPlayer[333:12f03] no frame!

And so on.

Could somebody help me with this?

Thank you
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