[mythtv-users] Software encoders question
Harry Devine
lifter89 at comcast.net
Sat Jul 5 00:29:22 UTC 2008
Brad DerManouelian wrote:
> On Jul 3, 2008, at 1:15 PM, Harry Devine wrote:
>
>
>> I'd like to know what the difference is between the Default, LiveTV,
>> High Quality, and Low Quality software decoders is in Myth 0.21 (under
>> Utilities/Setup->Setup->TV Settings->Recording Profiles->Software
>> Encoders (v4l based). I recorded the minisode of "Rescue Me" the
>> other
>> night on FX and when I try to play it back, it looks like crap. I
>> don't
>> know how else to explain it except that the video is extremely jumpy
>> and
>> choppy, and the audio is very staticy.
>>
>> Any recording that I make using the analog portion of my pcHD5500 card
>> does this. FWIW, I use the Default profile for everything. And all
>> of
>> the recordings that I make using the Digital (DVB) portion of that
>> card
>> or my Firewire capture playback fine.
>>
>> Any ideas on what I can look at to figure out how to clean this up?
>>
>
> Try recording outside of Myth and see what your video looks like. If
> that looks like crap, you know you don't need to look at any Myth
> settings to fix it. At that point it would be something in the driver.
> a simple cat /dev/video > tempfile would work. Play it back with
> mplayer and see your results.
>
> If that looks ok, modify your default settings (since that's what you
> said you use to record) and kick up the bitrates until you see
> acceptable results.
>
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>
When I try that, I get "cat: /dev/video: Input/output error". I've also
noticed that when I try to tune a channel on the analog portion, I get
the exact same situation. Tuning to an analog station using TVTime
(which I know used to work) tunes the channel for about 1 second then
switches to a blue background with "No Signal" on it. I did a "tail -f
/var/log/messages" and saw the following in there for the analog tunes
(cx88 is the driver for my pcHD5500 card if I remember correctly):
Jul 4 20:25:26 HJDMyth kernel: cx88[0]/0: [ffff810032c2ae00/3] timeout
- dma=0x 0c7ac000
Jul 4 20:25:26 HJDMyth kernel: cx88[0]/0: [ffff810032c2a000/4] timeout
- dma=0x 21d12000
Jul 4 20:25:26 HJDMyth kernel: cx88[0]/0: [ffff810032c2a200/0] timeout
- dma=0x 23226000
Jul 4 20:25:26 HJDMyth kernel: cx88[0]/0: [ffff810032c2a600/1] timeout
- dma=0x 2335c000
Jul 4 20:25:26 HJDMyth kernel: cx88[0]/0: [ffff810032c2aa00/2] timeout
- dma=0x 22d5e000
I'm starting to think that this is a driver issue, but which one? The
v4l one? How do I find what I have and if there's an update for it?
Thanks for the help!
Harry
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