For all you use XMpeg

Hi,I'd like two discuss with all the people that use the XMpeg about the best setting to get the best quality possible.

In this moment i use:

IDTC: Miha's x87 Reference IDTC

Filtering: Bicubic

Format: YV12

Are this the best setting? I have some doubts in YUV2 and YV12, and what are the best choice. Anyone can help me!

No, for filtering, Bessingham ( I believe) is optimal.

for the iDCT plugin, it should autodetect the best one.  Although people swear that one is better than the other, there is no conclusive evidence to support this.

be sure to use DivX 4.12 2-pass encoding.

Here is what I would do for the sound.  I have spoken with the Xmpeg author and have let them aware of the problem in the multiplexing.  Here is what it is:

when playing back your video after encoding, you may encounter 2 places in the entire movie (if its a long one) where the audio and video try to re-synch.  but, if you try to go back and make it do it again, it won't.

here is how I solved this problem:

I demux the sound into a wave file with virtualdub then go into nandub, and re-mux it.  After that, the video is perfect!!I hope that helps you.
chip

I always made the sound with graphed to Wav and then join it to video and covert them to MP3 with VirtualDub.

My question it's about the settings that give the best result possible. I don't belive that Bressenham Filtering could be better than bicubic, just on the speed!

For IDTC, are many options and i don't really know what is the best. In the test Miha's x87 Reference IDTc gives me good result, but i'd like to see other users.

Thaks anyway!

Have you tried other iDCT options?

The MMX seems to be the most popular and most successful.good luck!
chip

Yeah, i tried some, but is difficult to see the diferences between them. Beasides, i don't have many time to do experiences.

I have made a 4:3 movie with bressenham filtering and it looks very good. It's 4x times faster in my machine, but i really wan't to believe that its better thet bicubic... i have to wate some time to do some experiences....

ThanksWell, I did a movie (the already classical Matrix) with Bresseham filtering and Xmpeg MMX IDCT, and then with SSE Bicubic filtering and Miha's x87 fast IDCT, and there's some difference in sharpness ... The second method, although about 20% slower, gives sligthly greater quality.

Hi to everyone. I read some posts about guys that gets a lot fps with XMpeg program. They are proud of speak to everyone how fast they encode a DivX.
Well. I make a huge and detailed comparison with Shrek. I use a Bessingham filter and as IDCT the auto option. Result: it´s fast, very fast, and quality is OK. Then, I encoded again the film using Bicubic filter and my Athlon900 512Mb 60GbBarracuda ATA4 was working for six hours. Result: quality is GREAT. Frames are clearer, edges are sharpener...
I usually encode DivX while I am sleeping, so time is not the most important...

Thanx to all.

Mick Imoto.

I usually encode DivX while I am sleeping, so time is not the most important...I do my DivX in the same way, while i'm sleeping and the time it's not a problem for me!

I just wanna got the best quality for 2 CDs Rip! In my teste Miha's Reference IDT is the one that gives me better results. For filtering i think bicubic is the best, but its very slow...

Other thing i read in other tread is that with codec 4.12 is better option not resize and just crop, because this gives better results.

And, i think that shrek is not the best film to compare and test different options, because it's a animation film and for me, i believe that is more easy to get a good ecoding that a non-animation movie.

forums.

Anyhow, I'm gathering that the consensus is that with Xmpeg 4.2a and divx 4.12 the way to go is : Bicubic, Miha's Reference IDT , no resize, and just crop to your tastes is slower, but will produce better results.

I'm going to give these settings a shot tonight.

for being french.

Anyhow, I can get pretty decent results with my earlier settings so I may jst sit tight. Or move to GK.

The only setting that was originally posted that will make difference in picture quality is the bicubic filter. Each filter is designed for a specific duty. If you are making a movie, you should NOT be using a bicubic filter, a bicubic filter is used when your encoded frames will be larger than the original. I dont see why anyone would be encoding over 720 x 576. A Billinear filter is used if the encoded frames are going to be smaller than the original which will be the case for most all people encoding, unless you are keeping the original resolution. Billinear will give you the best quality.