The VideoLAN Forums

Guys,

This is my first time to post to the forums, although I'll say that the folks here are a *wealth* of knowledge - which is why I figured I'd go ahead and ask the following in hopes that someone somewhere has some thoughts. Here goes....

I've got an mpeg of unknown origin. It has a .vfs extension and when I pop it into VLC to play it, it does fine... FOR VIDEO ONLY. There is no audio, whatsoever. Not sure if this is a PID issue, or what. I used a utility called bbdmux to look at and demux the TS. When I use bbdmux to pull the audio stream out and write it to a file, I can then drag that file into VLC and *presto,* I get audio, no questions asked. So - I know that VLC can play the audio... maybe it's just confused on where to look for it by default The output from BBDMUX looks like this: (any thoughts, guys? Thanks!)

Scanning for PID's, press control-c to quit ...

File temp.vfs is an MPEG-2 Transport Stream

Found PID 0x0000, Program Association Table Stream
Found PID 0x0020, Other Stream
Found PID 0x0021, stream id 0xE0 = Video Stream 0
Found PID 0x0022, stream id 0xC0 = MPEG Audio Stream 0
Found PID 0x0024, stream id 0xBD = Private Stream 1

Summary:

MPEG Transport Packets = 736732
PID 0x0000, Program Association Table packets = 1228, total bytes = 225952
PID 0x0020, Other packets = 1228, total bytes = 225952
PID 0x0021, Video stream 0 packets = 701651, total bytes = 128052749
PID 0x0022, MPEG Audio stream 0 packets = 29409, total bytes = 4097254
PID 0x0024, Private Stream 1 packets = 437, total bytes = 79922
PID 0x0025, Other packets = 2779, total bytes = 0

The better thing to do is to run VLC with full debugs and give us those. Here is how to do:

1- Open VLC, find a View>messages menu item (CTRL+M should be faster) to open the messages window
2- At the bottom, set verbosity to 2 (maximum)
3- Media> open your file
4- Once you rich a point when audio should have come and you have not, you can copy-paste your logs from the messages window.
5- Paste it here, around "code" tags please (there is a button above)
6- hope for those full logs to contain enough informations on the problem :)


You can also use, for your own and maybe for a limited duration, TS Reader Lite. It is a Windows (limited, maybe shareware) software which can show you a tree of elementary streams in which both Audio and Video streams should be shown as attached to the same PMT which should be attached to the PAT.

Ok, here's the output from debug...

don't you forget "code" tags ?:)

doh! - told you I was new to the forums. *fixed*

Unfortunately, I can't give you more clue to fix your audio.
Logs show a normal recognition of an audio track, then weird warning (first packet for pid=34 cc=0xd) and debugs for it (emulated startcode)..

ts debug: * es pid=36 type=6 *unknown*

Hmm... Can you share the file?