id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	mlocked
11018	Distortion of Recordings/LiveTV if EIT-Scan is processing on another capturecard	Shinck@…	Klaas de Waal	"After upgrading from MythTV 0.21 / Mythbuntu 08.10 to MythTV 0.24 / Mythbuntu 10.04 I detected distortions and artefacts in video/audio in recordings/LiveTV of my BT878/BTTV based DVB-S capturecard. After further investigations I saw that this was caused by an active EIT-Scan on my other DIBcom-3000mc based DVB-T card.
If both two cards are active I saw lots of this lines in backend-log:
{{{
  E DVBRead mpeg/pespacket.cpp:79 (AddTSPacket) AddTSPacket: Out of sync!!! Need to wait for next payloadStart PID: 0x12, continuity counter: 6 (expected 5).
}}}
So I decided to switch of EIT-Scanning of the DVB-T card and the distortions were gone (But as DVB-T and DVB-S in my setup don't based on the same Video-Source I lost EPG-Information of DVB-T and had to record or look LiveTV on the DVB-T channels to update the information).
I don't know If this was caused by mythtv or the LinuxTV-v4l/DVB driver framework but I hoped that updating to 0.25 makes things better.
As the problem wasn't gone with 0.25 I decided to write a patch that switches of the EIT-Scanning at all capture-cards if a program records or I look liveTV. 
After the last record finishes the timer eitCrawlIdleStart is set again on all cards.
With this attempt I also resolve another problem: I've setup my system to shutdown(hibernate) if it's idle and ACPI-wakeup before new recordings, but it never shutdown after a recording because a EIT-Scan on another card than the recording-card was running after the recording.

So now I provide the patch. Perhaps it could be helpful for some other people.
"	Patch - Bug Fix	closed	minor	needs_triage	MythTV - General	0.25-fixes	medium	Trac EOL	EIT		0