[vlc] VLC 0.8.6 cannot display first seconds of a H264 encoded clip streamed from Darwin

[Gun Akkor]

Hello David, and All;

I have been experiencing the same problem on a x86PC based Linux
platform running VLC version 0.8.6c while streaming UDP unicast or
multicast.

My clips were encoded using x264 library -- i can provide the command
line as well, if needed --

The debug output on the receiving VLC shows a series of the following
messages before the decoder can sync up to show the video:

> [00000392] packetizer_h264 packetizer warning: waiting for SPS
> [00000392] packetizer_h264 packetizer warning: waiting for SPS
> [00000392] packetizer_h264 packetizer warning: waiting for SPS
> [00000392] packetizer_h264 packetizer warning: waiting for SPS

I thought this may at least eliminate ffmpeg/x264, Windows XP/Linux,
Darwin and the hardware as the possible culprits. I have to agree with
David that this has to be related to the modifications to SPS/PPS support.

Regards,
Gun Akkor

David Betrand wrote:
> Hello all,
> I use VLC to play a rtsp url pointing to a H264/AAC encoded file. The 
> streaming server is Darwin. The stream was perfectly OK with VLC 
> version 0.8.5, but with all versions starting from 0.8.6 (including 
> 0.8.6c and trunk) show the same problem : the first seconds of the 
> clip are not displayed (only audio) and then (after a few secs) the 
> player is able to play the clip until the end. I suspect the player 
> to be forced to wait until the second I frame to be able to decode it 
> correctly.
> The clips are encoded with ffmpeg (i can provide the command line if 
> necessary) and hinted with MP4box. The problem is of course 
> reproducible as it occurs systematically.
> Note that when played locally, everything is fine. The problem is 
> only when the file is streamed. I also replaced Darwin with VLM and 
> the same problem occurs.
> I uploaded a sample file (h264_first_seconds_lost.3gp) on the 
> videolan ftp server under the h264_first_seconds_lost directory.
> 
> here are the details of my test environment :
> - VLC 0.8.6c
> - Windows XP SP 2
> - Darwin Streaming Server 5.5.4
> - Intel Pentium M 1.5 GHz, 512MB with ATI Mobility Radeon 9600 graphical card
> 
> As this problem seems to appear with version 0.8.6, i guess it is a 
> regression introduced with this version (I saw that h264.c was a lot 
> modified for SPS/PPS support). Any help will be appreciated.
> Thanks David
> 
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