[vlc-devel] Issue with PTS/DTS

[Christophe Démaret]

Hello,

I have some trouble in building an MJPEG 2000 decoder for VLC, looks 
like a time problem.
I don't have a good mjpeg2000 source that I can trust in a "normal" 
container, like AVI (Morgan looks strange).
So what I have done is this:
1) an access_demux module to put a JPEG2000 frame in a stream (using a 
kernel module because I simulate an hardware encoder but it works fine, 
i swear), then I use sout_standard to put those frames in an AVI.
2) open this AVI with VLC on another machine.

The advantage is that the images is generated by the same soft as the 
decoder used, which is JasPer.

The problem is that VLC seems to call the DecodeBlock() function over 
and over on the same packet and the DTS/PTS of the packet_t are 0 
although the dates were correcly displayed on the access_demux plug-in...

So I suppose this is not normal but first, could someone confirm ? I 
mean, I can't block_Release the block because i know it will do it again 
and the segfault :o

Could AVI be the problem ? Or is simply the sout_standard unable to 
manage the dates ? Do you know any tool to check the avi file itself 
(quite hard to read with an hex editor...) ?

I have uploaded the code and the AVI on ftp://ftp2.cdemaret.com/cdemaret/vlc
The logs from the both plugins are there too (the three empty debug 
messages are strange, they do work with the "debug logging" interface 
but not with messages...
The size of the frame is correct.

Once again, I just need help with the dates management: THIS is my 
problem here: if you have any documentation/mail/whatever to point this 
would really help.

Thanx :)

Christophe.

PS: This code is based on the work of other VLC authors, as such it is 
covered by the GPL. The final version of  this decoder will be published.

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