Jonathan Black wrote:
> John,
>
> Yes, ivtvctl -q 0 fixes the problem everytime. But it does cause the
> audio to skip for a second, so the cron job wouldn't go over well.
>
> I would like to see your script. I will most likely have to edit it some
> because I plan on having an option for my parents to record shows
> through the RCA as well if I need. I'll figure it out though. Your
> script should help me figure out where I have to edit code at and such.
>
> Thanks. I appreciate it.
>
> Jonathan
>
Jonathan,
OK, I'm really NOT a programmer, so forgive the hackiness of this.
Sounds like you and I have pretty much the same symptoms, so maybe this
will help.
Basically, what I did was to turn on all the debug messages and used
that to deduce what code was running whenever a recording began. I then
inserted a single line of code that invokes a shell script at the
beginning of that function.
Below is the segment of the program file tv_rec.cpp that includes the
three lines I added. In my case, with mythtv 0.19-fixes from about a
month ago, this begins on line 609 of that file.
My changes begin and end with a line like VERBOSE(VB_RECORD, "JBJBJB:...)
Following the tv_rec.cpp changes is the shell script I run. Most of the
stuff in the shell script is unnecessary -- it's just left over from
when I was doing some testing to verify that I was running the right
script at the right time. Also, I'm not sure whether the sleep 15 is
necessary, but I wanted to make sure the recording had actually begun.
In my case, I always start recording 90 seconds early anyway, so this is
not a problem.
========= tv_rec.cpp segment ===========
void TVRec::StartedRecording(ProgramInfo *curRec)
{
if (!curRec)
return;
VERBOSE(VB_RECORD, "JBJBJB: Begin Record Hack");
system("sh /space1/scripts/mythtv/prerecord &");
VERBOSE(VB_RECORD, "JBJBJB: End Record Hack");
curRec->StartedRecording(rbFilePrefix, rbFileExt);
VERBOSE(VB_RECORD, LOC + "StartedRecording("<<curRec<<") fn("
<<curRec->GetFileName()<<")");
======== shell script (e.g., /space1/scripts/mythtv/prerecord, in my
case) =========
#!/bin/sh
echo "Begin prerecord script (v0.2)..." >> /var/log/mythtv/prerecord.log
/bin/date >> /var/log/mythtv/prerecord.log
sleep 15
/usr/local/bin/ivtvctl --device=/dev/video0 -q0 >>
/var/log/mythtv/prerecord.log
echo "End prerecord script" >> /var/log/mythtv/prerecord.log
/bin/date >> /var/log/mythtv/prerecord.log
Let me know if this works for you. I'll try to answer any questions,
but my C++, Mythtv source, and ivtv knowledge are still pretty basic.
The good news is that this seems to work for me. I've had 3 or 4 cases
where I've had a recording start out with tinny audio, then, about 15
seconds into it, the ivtvctl script kicks in and it magically fixes the
problem.
Cheers,
john
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