MKV: Auto audio/subtitles language selection doesn't work.

Preferred audio language and Preferred subtitles language are both ignored, when playing MKV videos.

This issue happens on both vlc-2.1 and vlc-2.0 nightlies. it works fine on VLC-2.0.0.

assigned to @typx

added Component::Demuxers label

http://forum.videolan.org/viewtopic.php?f=14&t=99059

http://git.videolan.org/?p=vlc.git;a=commit;h=a2790164362bddf5e18c1d0e577e5c7787cc1be6

This commit causes this issue.

This commit was made to be spec compliant, I need at least the track info to analyze. If tracks are disabled or forced it is a nominal behaviour, if there is a default track and enabled not default tracks then it really is a bug.

I set Preferred audio language to "jpn". When I play MKV video that has two audio languages, Japanese audio track is not selected.

The following is mkvinfo's output (I deleted seekpoints):

(MKVInfo) + EBML head
(MKVInfo) |+ Doc type: matroska
(MKVInfo) |+ Doc type version: 1
(MKVInfo) |+ Doc type read version: 1
(MKVInfo) + Segment, size 245183060
(MKVInfo) |+ Segment information
(MKVInfo) | + Muxing application: libebml-0.6.4 & libmatroska-0.6.3
(MKVInfo) | + Writing application: VirtualDubMod 1.5.10.1 (build 2439/release)
(MKVInfo) | + Segment UID: 0xe0 0x6c 0x70 0x36 0xfc 0x3d 0xfe 0x1e 0xa6 0xbc 0x53 0xde 0x71 0xf2 0x38 0x79 
(MKVInfo) | + Duration: 1371.305s (00:22:51.305)
(MKVInfo) | + Date: Sat Jul 16 08:28:06 2005 UTC

<SNIP>

(MKVInfo) |+ EbmlVoid (サイズ：2736)
(MKVInfo) |+ Segment tracks
(MKVInfo) | + A track
(MKVInfo) |  + Track number: 1 (track ID for mkvmerge & mkvextract: 0)
(MKVInfo) |  + Track UID: 913337568
(MKVInfo) |  + Track type: video
(MKVInfo) |  + MinCache: 1
(MKVInfo) |  + Codec ID: V_MS/VFW/FOURCC
(MKVInfo) |  + CodecPrivate, length 40 (FourCC: XVID, 0x44495658)
(MKVInfo) |  + Lacing flag: 0
(MKVInfo) |  + Default duration: 33.367ms (29.970 frames/fields per second for a video track)
(MKVInfo) |  + Video track
(MKVInfo) |   + Pixel width: 640
(MKVInfo) |   + Pixel height: 480
(MKVInfo) |   + Display width: 640
(MKVInfo) |   + Display height: 480
(MKVInfo) | + A track
(MKVInfo) |  + Track number: 2 (track ID for mkvmerge & mkvextract: 1)
(MKVInfo) |  + Track UID: 519978492
(MKVInfo) |  + Track type: subtitles
(MKVInfo) |  + Codec ID: S_TEXT/UTF8
(MKVInfo) |  + Lacing flag: 0
(MKVInfo) | + A track
(MKVInfo) |  + Track number: 3 (track ID for mkvmerge & mkvextract: 2)
(MKVInfo) |  + Track UID: 3730029734
(MKVInfo) |  + Track type: subtitles
(MKVInfo) |  + Codec ID: S_TEXT/UTF8
(MKVInfo) |  + Lacing flag: 0
(MKVInfo) |  + Default flag: 0
(MKVInfo) | + A track
(MKVInfo) |  + Track number: 4 (track ID for mkvmerge & mkvextract: 3)
(MKVInfo) |  + Track UID: 2033775217
(MKVInfo) |  + Track type: audio
(MKVInfo) |  + Codec ID: A_VORBIS
(MKVInfo) |  + CodecPrivate, length 3977
(MKVInfo) |  + Audio track
(MKVInfo) |   + Sampling frequency: 48000
(MKVInfo) |   + Channels: 2
(MKVInfo) | + A track
(MKVInfo) |  + Track number: 5 (track ID for mkvmerge & mkvextract: 4)
(MKVInfo) |  + Track UID: 3527517314
(MKVInfo) |  + Track type: audio
(MKVInfo) |  + Codec ID: A_VORBIS
(MKVInfo) |  + Language: jpn
(MKVInfo) |  + Default flag: 0
(MKVInfo) |  + CodecPrivate, length 3977
(MKVInfo) |  + Audio track
(MKVInfo) |   + Sampling frequency: 48000
(MKVInfo) |   + Channels: 2
(MKVInfo) |+ Cluster

And VLC log with vlc --extraintf=logger --verbose=2 --logfile=d:\tmp\vlc.log --logmode=text --file-logging http://pastebin.com/PHFT9JS4

If the track does not contain Default flag, does it mean Default flag: 1?

Nevertheless if default track is enabled, preferred language setting is ignored?

If default flag is not set then default is assumed. But you are right this is a bug default should not contradict user pref.

commit 22c24d5a Author: Denis Charmet typx@dinauz.org Date: Tue Mar 13 22:29:02 2012 +0100

MKV: Don't ignore user preferences for track selection

Fix [#6375](https://code.videolan.org/videolan/vlc/-/issues/6375)

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Original author: typx@dinauz.org

added Status::fixed label

closed

Thank you. I confirmed the issue was fixed.

changed milestone to %2.0.1

VLC (2.0.7 on Arch Linux) still/again ignores the audio user preference and plays the 'standard' audio track in matroska files. To reproduce: Take a multilanguage matroska file and change the 'standard' flag to another language with mkvpropedit. Then play the file with VLC, it will pick this language.

removed Status::fixed label

reopened

No sample. Worksforme with the previous sample.

added Status::fixed label

closed