LiveTV Freezes Are Back on Clients

[sub]

No I meant think I have more hangs that are not related to it going to non-slip file mode. Going into non-slip mode happens after a hang.

It shouldn't ever be going to non-slip mode when watching live tv though, so we need to work out why this is happening. Being in non-slip mode is going to break other stuff like skipping in live tv etc, so we need to understand what is happening.

For a bit of background... When you start live tv, the recording service creates some shared memory and a mutex (with names derived from a hashed live tv buffer filename) . When you stop live tv or change channel, this original memory and mutex is supposed to be freed up.

When you tried viewing live tv, it tries to open the mutex and shared memory. For some reason this part seems to fail.

If you could try reproducing this non-rolling file, with HKEY_LOCAL_MACHINE\Software\npvr\LogTSWriter=1, then hopefully the c:\temp\writer-x.txt files might contain some errors like 'CreateFileMapping failed' or 'CreateMutex failed' etc.

[mvallevand]

I checked the backend and have a LogFileWriter key, can you confirm you wan LogTSWriter.

Martin

[sub]

For ATSC it's LogTSWriter.

[mvallevand]

Ok, I'll try ATSC but I haven't seen a confirmed fall back to non-slip mode anywhere but the HDPVR.

Martin

[sub]

Even before getting a log file, it might be useful if you can identify a pattern to when its rolling vs non-rolling (ie, whether those xml file descriptions are in the nrecord.log).

Is it as simple as starting the recording service, watching a channel (rolling), stopping it, then watching the same channel again (non-rolling). ie, like it's second attempt is failing because the first one isn't closing properly.

[sub]

Ok, I'll try ATSC but I haven't seen a confirmed fall back to non-slip mode anywhere but the HDPVR.

Martin

Ok, go with LogFileWriter=1 and HDPVR.

[sub]

I've just setup my development machine as a server with HDPVR, and another machine as client, and I think I just saw the same non-rolling file problem on second attempt to watch live tv.

No hang or anything yet, but I suspect this is a suspect it's going to happen if I leave it streaming live tv this way.

I'm about to stop it all and retry.

[sub]

Yep. Did exactly the same thing second time around.

For the record, digital did not have the same problem, so I suspect this is primarily a HDPVR or Analog problem.

I'm going to fire up the debugger and see whats happening.

[mvallevand]

Great, I haven't duplicated this on a simple stop.

Martin

[sub]

You should probably hold off doing anything right now. Let me look at this first.