Opened 17 years ago
Closed 17 years ago
Last modified 17 years ago
#2006 closed defect (duplicate)
Mythbackend stops recording 02:21 after programme start (DVB)
| Reported by: | anonymous | Owned by: | danielk |
|---|---|---|---|
| Priority: | minor | Milestone: | 0.20 |
| Component: | dvb | Version: | head |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description
I don't know if this is a dupe of #1872 (http://svn.mythtv.org/trac/ticket/1872) but "DVBSM(1)::RemovePIDFilter(0x1ffb)" does not appear in the log.
Using SVN, recording BBC Radio 7 (1708) in the UK. All programs stop recording 2mins and 21 secs after programme start This also affects live TV, the stream will stop 2mins and 21 secs after the start of a radio programme (nb not 2:21 after starting LiveTV but 2:21 after programme transition). This makes me think it's something in the stream.
- Log 1 - recording 03:30 to 04:00 on Radio 7 (fails)
- Log 2 - recording 01:15 to 01:45 on BBC 4 (TV channel on same multiplex) (succeeds) and 01:30 to 02:00 on Radio 7 (fails)
Any more information I can add?
Attachments (6)
Change History (13)
Changed 17 years ago by
| Attachment: | mythbackend.failed_1708_0330to0400.log added |
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Changed 17 years ago by
| Attachment: | mythbackend.failed_1708_0130to0200.suceeded_1009_0115to0145.log.gz added |
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Log 2
comment:1 Changed 17 years ago by
Definitely something in the stream 'Start recording 2 mins early' has produced a 4:28 recording. The status screen shows the tuner to still be in use, but if I watch the recording (it's not finished yet), the length is a constant 4:28
comment:2 Changed 17 years ago by
| Component: | mythtv → dvb |
|---|---|
| Milestone: | → 0.20 |
| Owner: | changed from Isaac Richards to danielk |
| Version: | → head |
comment:3 Changed 17 years ago by
Anon, can you attach a log w/"-v record" with the attached patch applied?
It looks like AdjustFilters?() never finishes it's job. The debugging patch should narrow down where it gets stuck.
Changed 17 years ago by
| Attachment: | mythbackend.failed-1200to1230-1708.log.gz added |
|---|
comment:4 Changed 17 years ago by
Thanks for the response - logfile is attached, trying to record BBC7 12:00 to 12:30 today. It's left a 2:21 recording as usual. The file's quite big as it's full of: AddTSPacket: Out of sync!!! Need to wait for next payloadStart
Which started appearing last night - possibly another case of #1888 as I'm also getting the 'Guide data until 2037-12-06 13:23' bug
comment:5 Changed 17 years ago by
| Resolution: | → duplicate |
|---|---|
| Status: | new → closed |
Changed 17 years ago by
| Attachment: | bbc7.patch.txt added |
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comment:6 Changed 17 years ago by
I've looked at this and the attached patch seems to work for me. I've made several recordings now off BBC7.
It seems that this problem only occurs with BBC7 and is something to do with them sending a new PMT at the beginning of each programme. The major bug was a deadlock that can occur if the dummy video thread is in the process of writing when AdjustFilters? is called. The thread acquires _pid_lock whenever it writes a packet but AdjustFilters? holds this lock. That means that StopDummyVideo? may not complete. Moving the call to before AdjustFilters? takes the lock fixes this.
There were two other things that I've included in this patch: both very minor. It seems that sometimes the frontend stops at the beginning of a programme when listening to live radio and I suspect that this is related to the new PMT and restarting the dummy video thread. The two changes I've made seem to improve this. Also I noticed when I played the test recordings of BBC7 that the logo and programme information weren't being displayed. My previous patch to fix a bug in the interactive TV had inadvertently turned off MHEG in recordings. This fixes that.
David.
Log 1