lxfdec fails to recognize 16 channels

[gerard3818]

Summary of the bug:lxf version 1 with 16 tracks created with VR are interpreted as 12 tracks audio channels, with 4 and 8 traks works fine.
How to reproduce: By exemple ffmpeg -i input.lxf -vcodec copy -acodec copy output.mxf

% ffmpeg -i input.lxf -vcodec xx -acodec xx output.xxx
ffmpeg version all the new with version 1 lxf support.
built on ...

[gerard3818]

Links to the files due to the size of them

[gerard3818]

In the example when mxf is created, has 12 channels and the mxf created is corrupted, is possible to play but has wrong video and audio timing.
All the file I sent are true native lxf version 1, you can use to test with trust.

[gerard3818]

Note: The files from  http://titan.codemill.se/~tomhar/samples/lxf/ not all are lxf version 1 native
1.lxf
100723-TAM VAN HOA-00240.lxf
F0015132.lxf
PM4617.lxf
ZB09_108_LXF_V1.lxf
F0000721.lxf
F0015132.lxf
LXF_File_1.lxf

All of them have invalid format when used in VR, 2 channels are not use in native lxf version 1.

[gerard3818]

Last Mediainfo reports badly 12 chanels too with device and trace, although find the 16 PCM channels inside in basic mode.

[cehoyos]

Is this also reproducible with current git head?

Please add complete, uncut ffmpeg console output.

[cehoyos]

Patch on mailing list.

[gerard3818]

I tested the patch and works fine with "ffmpeg -i input.lxf -vcodec copy -acodec copy output.mxf", the files created have 4,8 or 16 channels and they can be played well.
Please let me now if you need something else.
Thank you

[cehoyos]

Thank you for testing and the analysis!