I'm starting this thread based on an issue from another thread...
murf64 Wrote:... The MVP is another story. It won't play any avi's and causes the MVP to reboot. When I "remove all refs" i.e. go back to ffmpeg most of the transcoding appears to work, the exception being Youtube that's 50/50 at best.
Code:
For getting it to work with MVP, I'll start a thread for optimizing the defaults so the MVP will not crash
This thread should help tweak GB-PVR and ZProcess so that a transcode won't crash the MediaMVP...
[SIZE="1"]
It's very NTSC-centric but I can't really see why PAL should be much different an experience. I have run all of these tests using PAL settings, and it shouldn't be a problem. I'd be very interested in knowing if it works well in PAL-land...[/SIZE]
[SIZE="1"]Edit: Confirmed with all PAL aspect ratios (even 640x576, which I don't know even exists!!!)[/SIZE]
Situation
A common problem, where the MediaMVP starts to transcode a AVI on-the-fly, and then fails, and GB-PVR's MediaMVP interface crashes to the blue Hauppauge screen, happens mostly because:
ZProcess has the CPU priority set too high, and GB-PVR doesn't have enough horse power to continue keeping the MediaMVP up and running...
The ZProcess/FFmpeg/MEncoder isn't Transcoding fast enough to keep up with GB-PVR Displaying the file
In the first case, I have had a lot of success keeping the CPU Priority set to "Below Normal" because at this speed, it plays fair and well with other applications, like GB-PVR, The MediaMVP interface, and the Recording service. Even GB-PVR recording and having Comskip.exe running parallel with the recording, seems to work well on my Sempron 3100 and My Celeron D (2.8 Ghz) (My Athlon xp2100 has a bit of problem running it all with a realtime comskip running...)
In the second, I've found that tweaking the settings in ZProcess's Trans2MVP profile makes a huge difference. Another improvement is to change the amount of PrePlay Delay GB-PVR waits for Transcode before it starts the show...
The PrePlay Delay is like a running start, and means that GB-PVR is hoping to have more than x amount of the video transcoded, just so it doesn't risk running out. (crashing) Even on my very fastest machine, I have changed the PrePlay from GB-PVR's default of 5500 5.5 secs to 7000 7.0 secs. I haven't had a crash since. On my slowest machine, 10000 10.0 secs works perfectly...
ZProcesses defaults are often based on the DVD standards, but some of the values can be turned down, toi allow for more stability.
The biggest improvement can come from Dimensions. 352x240 will transcode much, much faster than the default of 720x480. (But at what cost?) I have noticed that 352x240 still shows better than a VHS tape. But with my faster machine, I'm afforded either 640x480 or 720x480. I choose the 640x480 because of the ~15% speed boost I get, and I really can't see the difference... (Very Very sharp...)
Video Bitrate is set to 6000 for the DVD Preset, but I have it set to 4000. I don't see much of a speed boost. Same as the Audio bitrate and frequencies...
But when I set my system up thusly, My transcoding goes that much quicker..
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And I get a Transcoding frame rate of about 50 with nothing else running (I lied, got the recording service, and an Idle Media MVP, but nothing taxing)
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But when I start VLC to display the currently transcoding video I get less Framerate.
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This is too low... You absolutely need 30 FPS because video plays at 29-30 frames per secs. In a perfect world this would be fine. But one little thing happens, like another program starting up, or your wife checks her email, and the framerate plummets for a second, and you lose a precious second of the Preplay buffer...
(The above example is on my dev/production computer running the XP2100+ with a gig of ram - I've always known that the framrate sucks, so I have to compromise and change my dimensions to 352x240)
Here's what I get if I lower the dimensions and run VLC...
101 fmps, CPU untaxed, 85 with VLC running...
This is why I built VLC support into Zprocess. It simulates the 'taxing' of the CPU when you try and run the MediaMVP and Transcode on the fly...
the new directory delete function with the REC key, is that supposed to delete the directory as well? when i use it it deletes all of the files in the directory, but leaves the empty directory behind.
Hi, I am very new with GB-PVR. I have a Vbox cats eye 150 setup and finally have the tv display looking good (after resorting to overlay). However now anytime I attemp to un pause the program throws an exception.
Hi, Any idea's why there are 14-programs each with 'Channel Number: 0' against them that are showing in GB-PVR Config - Channels and how to go about deleting them?. Think that they're causing problems with programs that are being recorded. Clicking on Remove Unreferenced Channels doesn't seem to be doing anything .
In the old days, now as well I guess, we can emulate TV transmitters (on tiny power) so that we can tune in videos, STBs, cameras, games etc with RF modulators and watch them on analogue TV or tuner cards.
Can we now or in the future be able to digitise, mux and RF modulate to something like DVB-T to do the same but for digital TVs and Tuner cards.
I'm wary of taking the step to a digital TV with the consequent hassle of not being able to "tune in" my ancient add-ons.
I am desperately trying to play an avi movie on my MVP. The video comes out perfect but the sound is completely distorted. I have played around with the ffmpeg settings in the config file but nothing works. The file, of course, plays just fine on the PC...
Can anyone tell me what type of app to use so I can compress my MPEG-2 recordings and put them on a dvd? I recorded the recent fight and it is over 10 gigs (almost 3 hours) at the highest setting!
I have a problem that others on the forum have posted about. When I resume from standby, the video is choppy. The solution seems to be using the wake.cmd batch file to shut down and restart GB-PVR. Problem is I can't find what commands to put in wake.cmd to do this. A little help would be appreciated.
I don't know what that is ? schould it be fixed ? or "if it isnt broken, don't repair it"
I have no idea how long this is already there. I upgraded to 99.5 around christmas.
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