FPS rate with 3.1alpha codec

[SilverPaladin75]

I'm using an AthlonXP 1600, and getting an intolerable 16fps when I divx using the 3.1 MPEG4 low motion codec set at 100 crispness, key frame every 3 sec, and ~700 bit rate. What fps should I expect? And what settings and parameters are used to optimize and get a faster fps (I hope to get around 30)??

[khp]

Re: FPS rate with 3.1alpha codec

Originally posted by SilverPaladin75
What fps should I expect? And what settings and parameters are used to optimize and get a faster fps (I hope to get around 30)??

Encoding framerate depends heavily on the tools that you use, the compression format of the source material and what kind of filtering you use inbetween.

For DVD rips the fastest method is to use avisynth for frameserving into vdub. The easiest way to do this is to use gordianknot.

http://gknot.doom9.org/

[benderman]

16 fps is OK on an Athlon 1600. Higher framerate will include lower quality. For that you can use DivX3.11Fast or DivX4.11 with fast-encoding.

[Enchanter]

I hope to get around 30

That's a far cry from your current DVD decoding speed! You can get this kind of fps only when you're working with mpg files or the like existing on your HD. If you're really dying to get this speed, disable all of your processing filters and get a faster CPU. But then again, I doubt even the fastest CPU in the consumer market will be able to rip through the process with all the processing filters enabled.

[SilverPaladin75]

First off, thanks a lot KHP for the gnot link. Their package is great, but I'm not looking for that kind of micromanagement right now. Can you use their program (encoder) with just one pass, and in the more "automated" mode? I haven't tried yet, just thought I'd ask before giving another 5 or so hours, just in case you reply

Second, thanks for the feedback enchanter; using the gnot encoder, I actually got 25-35 fps. I don't know why I can't get those kind of rates with flaskMPEG.

[Enchanter]

I heard many saying that Flask is very slow, compared to others, though I can't find much difference anyway.

[khp]

Originally posted by SilverPaladin75
First off, thanks a lot KHP for the gnot link. Their package is great, but I'm not looking for that kind of micromanagement right now. Can you use their program (encoder) with just one pass, and in the more "automated" mode? I haven't tried yet, just thought I'd ask before giving another 5 or so hours, just in case you reply

GKnot is not really built for one pass encoding, however you can do it, after saving the avs script in GKnot you can shut down GKnot, and load the avs in virtualdub.

Originally posted by SilverPaladin75
I don't know why I can't get those kind of rates with flaskMPEG.

It's primarily because flask converts the mpeg video from the YUV colorspace to RGB, and sends that to the divx codec, the divx codec will then convert it back to YUV before compressing it. With frameserving with avisynth the video can stay in the YUV format. But you have to select 'fast recompress' in the video menu in virtualdub, otherwise vdub will also convert to RGB.

[Enchanter]

So should I disable this feature in DVD2AVI as well, when creating a project file (ie. Keep the video in YUV format)? WHat are the possible problems with doing that?

[khp]

Originally posted by Enchanter
So should I disable this feature in DVD2AVI as well, when creating a project file (ie. Keep the video in YUV format)? WHat are the possible problems with doing that?

Actually I'am not sure this has any effect when saving a project file. But quality wise there should be no difference.

[Enchanter]

That put my mind at ease. Thanks, khp.

[SilverPaladin75]

GKnot is not really built for one pass encoding

khp, what do you recommend for one pass encoding?

[khp]

Originally posted by SilverPaladin75


khp, what do you recommend for one pass encoding?

I won't recommend using one pass encoding at all, as far as I am concerned spending twice the time to gain a bit more quality is well worth it.