Option for using "High"-Priority during recording...

[ghost_zero]

Hi,

I would like to see an option (settable via options) that GBPVR-Recording-Service uses "High"-Priority during recording...
And a second one to use "High"-Priority during LiveTV...

That would be great because if e.g. I start FireFox during a video gets recording (Plextor ConvertX) the video may stutter at that time because the recording service did not have enough time for encoding audio...
And therefore "High"-Priority would be good...
Of course, those things also depneds on the CPU-Speed... but as far as I know changing Priority in C# (.net Framework at all) is not that hard... so it should not be that hard to implement... I have done this before...

[sub]

I personally think its a bad idea to start fiddling with process priorities, but I should point out there is the following setting in config.xml:

<ForceHighPriorityRecordingService>false</ForceHighPriorityRecordingService>

[robplatt]

I thought the card did all the encoding and the cpu just wrote it to the drive. and if you had a seperate drive, then if your computer hung for 1-2 seconds the buffer would write it to disk anyways.

However. I would like gbpvr to be high priority at times as well. sometimes the whole app.

[ghost_zero]

@robplatt:

The video yes... but the audio not and because to keep audio/video-synchronsation the whole video would stutter...

<ForceHighPriorityRecordingService>false</ForceHighPriorityRecordingService>

Does this only use Force-High-Priority during recording or the whole time? I don't want to have a High-Priority-Service all the time just when recording starts...

I now tested it and it is then ALWAYS on "Higher then normal" ... I would like to have it the real "High" and just during recording... I might would write an own program but it seems that I can't change the recording-service priority on-the-fly (at least not from task manager)... otherwise I would write a PreRecording-Program...

[ghost_zero]

OK I found out that it works with a C# Program to change the priority of the recording-service...

Is there a PreProcessing.bat that starts before recording starts?

I know it is possible with PVRPowerTray but that needs too much CPU-Usage and memory for just a prerecording script...

[sub]

I thought the card did all the encoding and the cpu just wrote it to the drive. and if you had a seperate drive, then if your computer hung for 1-2 seconds the buffer would write it to disk anyways.

ghost_zero's plextor device does a lot of stuff in software (audio encoding, stream muxing) so is more CPU dependent than device like PVR150 etc.

[sub]

I now tested it and it is then ALWAYS on "Higher then normal" ... I would like to have it the real "High" and just during recording... I might would write an own program but it seems that I can't change the recording-service priority on-the-fly (at least not from task manager)... otherwise I would write a PreRecording-Program...

Why? What is this going to achieve? If you leave the recording service at high priortity between recordings, then "doing nothing" at high priority isnt going to impact anything else. It seems pointless to drop it back to normal priority between recordings.

[ghost_zero]

Who says that I do nothing during recording or at least that the PC does nothing during recording?

Ah btw. who says that I do nothing during recordings? Ah you mean the Recording-Service? That is not completely right it at least needs to check if there are recordings and if when they start... that would be done with higher priority... but you are right it is not that important because the program does not much during not recording... but I still would like to have my priorities set to normal if I don't need to change them... That is more personal flavor - especially if the program might has a bug that it suddenly has a high CPU-Load, if you then have set it to high you will not be able to change it that easily or kill it... but the back-changing is not the problem.. PostProcessing.bat exists... but PreProcessing.bat?

Is there something like a PreProcessing.bat or will there come one?

[sub]

That is not completely right it at least needs to check if there are recordings and if when they start... that would be done with higher priority...

This would consume virtually 0% CPU. If it does it at high priority, its not going to impact anything else running on your machine.

That is more personal flavor - especially if the program might has a bug that it suddenly has a high CPU-Load, if you then have set it to high you will not be able to change it that easily or kill it... but the back-changing is not the problem.. PostProcessing.bat exists... but PreProcessing.bat?

Is there something like a PreProcessing.bat or will there come one?

There is a ParallelProcessing.bat which is called immediately after starting the recording. Honestly though, I would bother. It sounds like wasted effort. It'll also get complicated if you add a second capture device in the future.

[-stattik-]

GBPVR doesn't use too many cycles when you're not using it so even if it were at high priority at all times it shouldn't interfere with other processes. The only time when GBPVR at high priority would interfere with other processes would be during recording using the Plextor which is needed and when using the frontend which means you would be using other apps anyway. The EPG update could be scheduled during a time when you wouldn't be using anything.