It doesn't seem like I am doing this right? Compressing AVI files.

[ccirish]

I have an Avermedia Game Capture HD. When using it to record games it records huge files. 3hrs of gameplay = 5x 4GB files. I am currently trying to compress these using VirtualDub, 64-bit. I'm appending all 5 files to one, then using these settings:

Video: Full Processing, Xvid MPEG-4 Codec (Xvid Home Profile @ 738kbps)
Audio: Full Processing, Lame MP3 (2050Gz, 64kbps ABR, Stereo)

It produces a reasonable file size, but takes 8 hours. 8 hours is like 2.5x real time.

Is there a way to accomplish this faster? Am I doing this correct?

Thanks.

[poisondeathray]

It seems very slow for a modern computer

What are the dimensions of the capture? What are you computer specs ?

[ccirish]

It seems very slow for a modern computer

What are the dimensions of the capture? What are you computer specs ?

The capture is 1080i (1920x1088 @ 59.94), my computer is not slow (i7-2600K @ 3.4GHz, 16GB ram, Twin GeForce GTX 560 Tis, SSD).


Thanks for the quick reply!

[poisondeathray]

Something is not right

What codec are you using to capture? use mediainfo if you don't know

Do you have adequate cooling (maybe CPU is throttling down) , have you monitored temps ?

If you are capturing interlaced, are you using any other filters (deinterlacing filters?) or are you encoding interlaced ? Other processing can be a bottleneck

You might do a short test with vdub 32bit and xvid 32bit, might be an issue with x64

[jman98]

Is there a reason you're using Virtual Dub to do this instead of another tool? I've recently been using Xvid4PSP and it is really fast to encode to Xvid.

[ccirish]

Something is not right

What codec are you using to capture? use mediainfo if you don't know

Do you have adequate cooling (maybe CPU is throttling down) , have you monitored temps ?

If you are capturing interlaced, are you using any other filters (deinterlacing filters?) or are you encoding interlaced ? Other processing can be a bottleneck

You might do a short test with vdub 32bit and xvid 32bit, might be an issue with x64

Capture is H264, Also CPU usage never goes over 13%

[ccirish]

Is there a reason you're using Virtual Dub to do this instead of another tool? I've recently been using Xvid4PSP and it is really fast to encode to Xvid.

No particular reason other than I used to use it back in the day...

[ccirish]

Is there a reason you're using Virtual Dub to do this instead of another tool? I've recently been using Xvid4PSP and it is really fast to encode to Xvid.

XviD4PSP is at 7.5 hours to convert as well, although it uses 75% of my CPU...

[jagabo]

Xvid doesn't scale well past 4 threads. 6 to 10 fps sounds about right for 1080i encoding on an i7. You can set it to faster settings but you'll get lower quality.

[Cornucopia]

WAIT JUST A DURN MINUTE!

You're capturing already as h.264?! At around 15Mbps?! So that is giving you ~20GB for 3 hours (180 min)?!
Those are NORMAL sizes for 1080i60 HD video!!!

What you are really wanting at the end is fairly low quality SD video (Xvid home profile at 738kbps), so why aren't you already capping in SD? Save you all this trouble.
BTW, now that h.264 is common (and you've got a pc that should be able to easily handle it), I see no reason to stick with Xvid, when you can use h.264 at the same bitrate and get better quality (or lower bitrate, same quality, or in-between).

Scott

[ccirish]

WAIT JUST A DURN MINUTE!

You're capturing already as h.264?! At around 15Mbps?! So that is giving you ~20GB for 3 hours (180 min)?!
Those are NORMAL sizes for 1080i60 HD video!!!

What you are really wanting at the end is fairly low quality SD video (Xvid home profile at 738kbps), so why aren't you already capping in SD? Save you all this trouble.
BTW, now that h.264 is common (and you've got a pc that should be able to easily handle it), I see no reason to stick with Xvid, when you can use h.264 at the same bitrate and get better quality (or lower bitrate, same quality, or in-between).

Scott

Heh to make a long story short, I need to record 8 sources at the same time, then need to send them through the network to someone who will be editing them. I bought 8 of the stand alone Avermedia Game Capture HD boxes, which will not let me change the recording size.

[Cornucopia]

Then you need to send them through the network AS IS. They're already GREATLY COMPRESSED (and already a pain to edit). Don't make it worse by dropping the resolution AND the quality down by 90% MORE!
Once you drop the quality, you can't get it back.

Scott