[mythtv-users] SVN 8625 Firewire capture glitching while test-mpeg2 doesn't
Steve Adeff
adeffs at gmail.com
Fri Jan 20 02:07:30 UTC 2006
With Jim Westfall's help I've yet get a 0bit firewire recording, its worked
everytime. What I notice though is a lot of glitches in the capture. Sample
log output:
2006-01-19 14:46:12.625 audio waiting for space on soundcard: have 2752 need
6144
[mpeg2video @ 0x2aaaabffa4c0]MPEG motion vector out of boundary
[mpeg2video @ 0x2aaaabffa4c0]MPEG motion vector out of boundary
[mpeg2video @ 0x2aaaabffa4c0]Warning MVs not available
[mpeg2video @ 0x2aaaabffa4c0]concealing 4265 DC, 4265 AC, 4265 MV errors
2006-01-19 14:46:12.640 audio waiting for space on soundcard: have 5760 need
6144
depending on the glitch, I may receive between 4-40+ lines like this every
2minutes or so.
As an experiement, I ran a test-mpeg2 capture on the same channel (though the
channel doesn't matter), grabbed 1.8GB and played through the internal player
using MythVideo. This method results in a glitch free capture for the 17mins
of video.
For MythTV I have the Firewire port set to record via "broadcast", previously
I had it set to "p2p" as it is what worked when testing with test-mpeg2.
Here's my plugreport for the capture from test-mpeg2:
Node 2 GUID 0x000e5cfffed720aa
------------------------------
oMPR n_plugs=1, data_rate=2, bcast_channel=63
oPCR[0] online=1, bcast_connection=0, n_p2p_connections=1
channel=63, data_rate=2, overhead_id=0, payload=376
iMPR n_plugs=0, data_rate=2
So then I tried switching mythtv-setup back to a p2p connection to see if that
fixes the glitches, but it still gets the glitches and doesn't alway get a
stream.
Now I've got mythtv-setup back to broadcast and its working like it was
before, and for kicks did another test-mpeg2 capture this time on another
channel, another 1.2GB and again using the internal player I get no glitches
playing it back (verified by a search through the frontend log).
so it looks like somethings wrong with how MythTV captures via the firewire,
and I'll be happy to try and help find the problem if anyone has anything for
me to try.
--
Steve
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