On 7/22/06, <b class="gmail_sendername">John P Poet</b> <<a href="mailto:jppoet@gmail.com">jppoet@gmail.com</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I have been struggling to get *reliable" firewire communication<br>between my computer and my SA3250HD cable box. I got it working last<br>night, and scheduled a half dozen shows to record on different<br>channels, throughout the night. They all recorded just beautifully.
<br><br>Today I noticed a recording start up, and the SA3250HD trying to<br>change channels but it went to the wrong one. I stopped the recording<br>and changed the channel myself. Then I tried to capture via<br>test-mpeg2 but got a zero length file. After about 30 minutes of
<br>randomly trying things, I got the firewire to work again.... for a<br>while. A few hours later it was out of sync, again.<br><br>If I use 1394commander to reset the bus, and use plugctl to prime the<br>bus, and get the channel changed to a good one, and use test-mpeg2, I
<br>can get eventually get a valid video stream. Once test-mpeg2 is<br>working, I can start myth backup and it will work -- for a while.<br><br>I have not been able to figure out the sequence of events needed to<br>get the 1394 bus resynchronized when it looses it. Sometimes just
<br>resetting the bus is enough. Other times it seems like various<br>combinations of plugctl and test-mpeg2 are necessary.<br><br>I get the impression that people with Motorola boxes have a bit more<br>success with this, than those of us with Scientific Atlanta boxes.
<br><br>The very first time I ever successfully captured video via firewire,<br>It was after I followed Allan's directions here:<br><br><a href="http://www.gossamer-threads.com/lists/mythtv/users/209409#209409">http://www.gossamer-threads.com/lists/mythtv/users/209409#209409
</a><br><br>Unfortunately, those instructions do not work every time.<br><br>Since I cannot remember where I got it, I am attaching the version of<br>sa3250ch.c that works (most of the time) for me.<br><br>John<br><br><br>
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</a><br><br><br><br></blockquote></div><br><br>Just an idea but could you be changing to an encrypted channel that causes you to loose your connection to the cable box. I had to create a new listing and tie that listing to my firewire tuner so that firewire would only pickup recording and change to channels it could get to. Just an idea
<br><br>Allan<br>