Opened 16 years ago
Closed 15 years ago
#5989 closed defect (fixed)
Dvd playback problem - PCM DVD unsupported sample depth
| Reported by: | Owned by: | skamithi | |
|---|---|---|---|
| Priority: | major | Milestone: | 0.22 |
| Component: | MythTV - DVD Playback | Version: | head |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description (last modified by )
The Biography channel Barack Obama DVD does not play. The frontend log is flooded with error messages.
Attachments (5)
Change History (21)
Changed 16 years ago by
| Attachment: | frontendlog.zip added |
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comment:1 Changed 16 years ago by
Checked playback with a different DVD, all is fine. Running trunk 19252. Have to return this DVD to the library, so I hope the logs are enough.
comment:2 Changed 16 years ago by
| Description: | modified (diff) |
|---|---|
| Status: | new → infoneeded_new |
error from wstewart's log is:
2008-12-07 19:25:49.828 [pcm_dvd @ 0xb6fefbd0]PCM DVD unsupported sample depth 2008-12-07 19:25:49.828 [pcm_dvd @ 0xb6fefbd0]invalid PCM packet
Assigning the case to janneg. I have a stripped dvd that produces the same error and will provide a link to the stripped dvd soon. Problem appears after latest ffmpeg resync.
comment:3 Changed 16 years ago by
| Status: | infoneeded_new → new |
|---|---|
| Summary: | Dvd playback problem - Bio Barack Obama → Dvd playback problem - PCM DVD unsupported sample depth |
comment:4 Changed 16 years ago by
| Owner: | changed from Isaac Richards to Janne Grunau |
|---|---|
| Status: | new → assigned |
comment:5 Changed 16 years ago by
Chopped DVD can be found at http://38.114.169.249/pcm_dvd_failure_dvd.tar.bz2
When you start the dvd, select "DVD Menu" from the OSD, to get to the DVD Menu, then select "play movie". Problem is visible then.
This chopped dvd was provided to me by Otto Kolsi, a long time ago.
comment:6 Changed 16 years ago by
this issue may be related to a discussion on ffmpeg thread . no patch has been applied. will test the discussed patches and see which one works.
comment:7 Changed 16 years ago by
comment:8 Changed 16 years ago by
| Owner: | changed from Janne Grunau to skamithi |
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taking over this ticket. now that the codec_type is been reported properly. i see what the problem is.
comment:10 Changed 15 years ago by
the problem is that a new PCM format was introduced in ffmpeg, PCM_DVD. on some dvds, this PCM format is seen in the first dvd cell but no where else. mythtv is currently not able to switch to the PCM_S16E format that is used by the rest of the dvd, so incorrectly decodes PCM_S16E audio as PCM_DVD audio. It doesn't detect the change from pcm_dvd to pcm_s16e as a stream change, so doesn't close the codec and restart the codec using the pcm_s16e format.
The latest ffmpeg sync should help somewhat with this problem, on some dvds, as the pcm_dvd code in ffmpeg was fixed to better handle audio that should be using pcm_dvd format. and i was waiting for this to happen before i look further into a fix for this issue.
Right now i cannot look into this issue.
if someone wants to take a stab at this problem and wants some tips on where to start, email me and i can offer my 2c on the matter.
comment:11 Changed 15 years ago by
| Milestone: | unknown → 0.22 |
|---|---|
| Priority: | minor → major |
This needs to be fixed before 0.22 is released. hopefully will get some time to fix this in sept if no one provides a fix before then.
comment:12 Changed 15 years ago by
| Component: | mythtv → MythTV - DVD Playback |
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Changed 15 years ago by
| Attachment: | change_dvd_pcm_audio_type.diff added |
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change dvd audio type from pcm_dvd to pcm_s16BE if its startcode is a0..what it was before the latest ffmpeg resync
comment:13 Changed 15 years ago by
| Severity: | medium → high |
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bhuffman, and wstewart. please test the latest patch attached to this ticket. it fixed the problem on my test dvd. if it works for you i'll get it committed asap. still not sure why this change occurred in ffmpeg. Need to investigate..
Changed 15 years ago by
| Attachment: | move_addaudiodata_from_IMPORTANT_TO_PLAYBACK.diff added |
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logging of the addaudiodata error messages can really slow things esp in dvd menus. moving it to playback error class makes playback much smoother.
comment:14 Changed 15 years ago by
| Severity: | high → medium |
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Changed 15 years ago by
| Attachment: | proper_fix_in_pcm.c.diff added |
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after reading ffmpeg alias, looks like code was changed to support LPCM. found what looks to be atypo int he code that is causing this problem. attached fix
comment:15 Changed 15 years ago by
comment:16 Changed 15 years ago by
| Resolution: | → fixed |
|---|---|
| Status: | assigned → closed |
(In [21901]) Closes #5989. move AddAudioData? error notification from IMPORTANT to PLAYBACK. makes dvd menu audio playback less jumpy during transitions.
frontend log; zipped cause trac wouldn't accept raw file