DRF too high? (And another problems)

Hi, I'm compresing an interlaced video. I want to get the best quality. I compressed the video with two pass with the xvid 1.2 codec and the custom quantization matriz eqm_v3hr.xcm (I use a bitrate of 1900Kb/s) But I obtain a video with a DRF average (Measure using DRF analyzer) too high: 3.557. DRF 2: 19% DRF 3: 14% DRF 4: 56% DRF 5: 10% If I compress the same video (I do the two pass again.), with he quantization matriz MPEG, I obtain a video with a DRF average 3'318 DRF 2: 30% DRF 3: 7% DRF 4: 63% DRF 5: 0% But the XVid status windows show me the next (It is the second pass): According to these graphic, the Ivop frames has got DRF 2, the Pvop DRF 2 and the Bvop DRF 4. How can to be diferent the values of the DRF Analyser and the Xvid windows status? How can I obtain the best image quality? Would I can reduce the % of Bvop frames? Another question, the image shows some ugly spots when its seen in a railings in fast foward. Can it be by the deinterlaces filter (TIVTC+TDeint(EDI) - slow)? Thanks very much!

It would be very helpful if you can post what settings you used for the codec. I can guess what you used for your min and max DRF settings but that's about it. It looks like you are using 2 bvops... try using 1 instead. Picture 1 shows interlace artifact. Picture 2 shows edge ringing. I am not sure if the ringing is cause by the codec or your source really looked like that...

What's this DRF stuff ? You're talking about quantizers right ? Simply set bvop quantizer offset to 1, quant. ratio to 1.0, and set encoding to "target quantizer mode", with quantizer=2. Since you are targeting quality, it's logical to choose a target quality, not bitrate (I can't make this more obvious, I'm even sounding ridiculous the way I wrote this :p). You can even set max bvops to 1 instead of 2, if that's really what you want, but the average quantizer (DRF as you call it) isn't as indicative of the quality when bvops are enabled. If what you see doesn't suit you, the next step is to try several quantizer matrices until you get the right look :)

The deinterlacer destroyed that image. Not sure why it would, can you post a short extract of that scene? (cut using dgindex or similar, not the xvid encode) That might be where the real quality problems are coming from. Might be able to recomend a filter to denoise the picture slightly too.

I can't download the test clip. Can you upload it elsewhere? ------------------------------------------------------------------ I've just tried the test clip. The fast motion is really harsh. Even mvbob() leaves some artifacts. I am trying to upload it somewhere. Sample clip: Since this is a high motion scene, i encode it at 4000kbps with V3LR.

Thanks. What can i do? Is a good idea deactivate the deinterlace filter at those frames? Can I deactivate it during any frames (At the .avs file)? Always can cut the video at 3 parts, but I prefer to not cut, because It can create "clicks" on the audio.

There is no need to split the video. If you use 2pass encodes, the difficult scenes will be allocated with more bits. Interestingly, tomsmocomp() works quite well on this clip after mpeg2source()'s deblock is applied. mvbob() works great too. tdeint() improves a bit too but it still leaves residual combs. mpeg2source("railing.d2v",cpu=4) colormatrix(d2v="railing.d2v") tomsmocomp(1,5,0) degrainMedian(mode=3) Sample: [Teegedeck's Quality Preset Level 45 at 3000kbps] ------------------------------------------------- It's strange that I fail to reproduce this result again.