What does these errors mean ?

[msvittal]

Hi All,
I am observing many errors when I try to transcode mpeg4 streams. I believe many people know what exactly is that error and the reason for those errors. Can some on please let me the reason and how to fix each one of them.

1. libdvbpsi error (PSI decoder): TS discontinuity (received 15, expected 0) for PID 50
2. [00000452] ts demux warning: discontinuity received 0x7 instead of 0xd (pid=32)
3. [00000481] packetizer_h264 packetizer warning: waiting for SPS/PPS
4. libdvbpsi error (PSI decoder): TS duplicate (received 0, expected 1) for PID 50
5. [00000516] avcodec decoder warning: error while decoding MB 24 4, bytestream (-8) (h264@0x8882dd0)
6. [00000516] avcodec decoder debug: concealing 805 DC, 805 AC, 805 MV errors (h264@0x8882dd0)
7. [00000438] stream_out_transcode stream out debug: drift is too high, resetting master sync
8. [00000516] avcodec decoder warning: B picture before any references, skipping
9. [00000516] avcodec decoder warning: decode_slice_header error (h264@0x8882dd0)
10. [00000516] avcodec decoder warning: no frame! (h264@0x8882dd0)
11. [00000516] avcodec decoder warning: cannot decode one frame (44 bytes)
12. [00000516] avcodec decoder warning: cabac decode of qscale diff failed at 15 7
13. [00000516] avcodec decoder warning: left block unavailable for requested intra4x4 mode -1 at 0 19
14. [00000516] avcodec decoder warning: illegal short term buffer state detected
15. [00000516] avcodec decoder warning: Missing reference picture

Thanks a lot,
Vittal

[Rémi Denis-Courmont]

You're loosing TS packets, meaning your input signal is bad.

[msvittal]

Hi Denis, Thanks for the response.

Are there any tools that I can use to findout if there are any packet drops in my network ?
Also do you know any of MPEG2-TS analyzer which can show me continuity errors (Fedora 10) ?

Thanks
Vittal