Audio starts cracking up at end of long recordings

[jksmurf]

I don't get time to watch movies much but now that the rugby's started again I can confirm what I thought was intially a once off.

On longer recordings of around 2 hrs, for approx. the last 1/2hr the audio starts to becomt terrible. It's still audible, just very poor quality. I don't think it's out of sync (difficult to tell in a rugby match) but 2hr movies seemed OK sync wise, it's just the recording quality cracking up badly.

It used to be OK on the previous version. Could this be related to ffmepg / comskip (I have comskip run post recording) or is there perhaps a higher network / CPU demand with 99.5?

I'm keen to troubleshoot it by turning off / on stuff or replacing ffmpeg (is the old version still available?). I use the MVP exclusively so I don't know if it happens on the PC.

k.

[sub]

Its not something I've noticed, or seen reported.

Since you mention ffmpeg, what type of file was it? Are you converting your recordings to xvid or something? If so, its probably worth testing leaving it as an MPEG file to see whether it makes any difference.

[jksmurf]

Its not something I've noticed, or seen reported. .

I know. I've been looking out for someone else with the same thing, but nearly all of my issues seem to be one-offs :-(

Since you mention ffmpeg, what type of file was it? Are you converting your recordings to xvid or something? If so, its probably worth testing leaving it as an MPEG file to see whether it makes any difference.

I only record and play MPEG2, mainly due to CPU Power and MVP usage. So it's not transcoded, I just thought maybe comskip used ffmpeg somewhere along the line.

k.

[sub]

Sorry, I'm not really sure what to suggest there.

[HtV]

Are you sure (just asking) it's a recording problem and not a playback problem? Could it be a hot mvp?:eek: . Might try increasing/decreasing audio-bitrate, see what happens. cya

[FirstTeamOPS]

I'm not at all familiar with the MVP. But are you able to play the recordings on the PC? Do they play fine there? If they do, then it's probably between the PC and the TV.

If not, though you have a 150, but my 350 throws out ALOT of heat when in use. Could there be an air flow problem in the PC case? Not getting airflow could be causing overheating and may cause your problem.

[jksmurf]

Hiya, thanks for your replies!

Could it be a hot mvp

Maybe. This is a new thing, as I wwatched a lot of 2 hr shows last year with none of these symptoms

I'm not at all familiar with the MVP. But are you able to play the recordings on the PC? Do they play fine there? If they do, then it's probably between the PC and the TV. If not, though you have a 150, but my 350 throws out A LOT of heat when in use. Could there be an air flow problem in the PC case? Not getting airflow could be causing overheating and may cause your problem.

Well I must admit I have not tried to watch 2 hrs on the PC. But they play fine for teh first 10 mins (as they do on the MVP) it's just towards the end it goes a bit whacko. I'll check the case fans. I wonder if my SPDIF mod has anything to do with this???

k.

[HtV]

If it's a recording matter the sound should go $%#@ at the same time when you play back on the computer.

[FirstTeamOPS]

Well I must admit I have not tried to watch 2 hrs on the PC. But they play fine for teh first 10 mins (as they do on the MVP) it's just towards the end it goes a bit whacko. I'll check the case fans. I wonder if my SPDIF mod has anything to do with this???

Sorry, I wasn't clear. If it was a heat issue with your 150, the cracking would appear in the recorded file on that PC as well. Your 150 is only in use when it's recording a show and not playing a show. I didn't clarify that in my previous post.

As HtV says, if it's a problem while recording, the cracking would appear in the same places in the show when you play the file from both locations (your TV and on your PC).

[jksmurf]

Sorry, I wasn't clear. If it was a heat issue with your 150, the cracking would appear in the recorded file on that PC as well. Your 150 is only in use when it's recording a show and not playing a show. I didn't clarify that in my previous post.

As HtV says, if it's a problem while recording, the cracking would appear in the same places in the show when you play the file from both locations (your TV and on your PC).

Ah ..."ding" ... I see what you mean, the recording itself was stuffed DURING RECORDING (possibly due to long term PVR150 heat build-up after recording for 2 hrs). I deleted that particular show, but I'll see if it happens again and try the last bit of the recording on the PC as well as the MVP. Thanks for the heads-up.

k.