Doom9's Forum - View Single Post - Bug report: Xvid quant 1+trellis is broken!

Ark · 16th November 2004, 20:42

I too experienced some blockiness on some encodes.
I don't know if it's CQM-related or Trellis/B-VHQ-related though...
I've done 2 full test encodings of Matrix, with same XviD settings, using EQM_V3LR for one and EQM_V3ULR for the other.

Xvid settings was:

2-pass
AQ/GMC/B-Frames default values
MSP6/VHQ4/B-VHQ/Chroma Motion
Trellis
Respect VBV buffer unchecked

The ULR one showed some blockiness only on scenechanges (I-frames), while LR was perfect.

Just to have another example...

EDIT: the blockiness happens on ALL scenechanges with ULR, so P and B frames after every I-frame are affected by a side-effect, being these based on a bad I-frame...

16th November 2004, 20:42	#16 \| Link
Ark Aikidoka Join Date: Nov 2003 Location: Italy Posts: 216	I too experienced some blockiness on some encodes. I don't know if it's CQM-related or Trellis/B-VHQ-related though... I've done 2 full test encodings of Matrix, with same XviD settings, using EQM_V3LR for one and EQM_V3ULR for the other. Xvid settings was: 2-pass AQ/GMC/B-Frames default values MSP6/VHQ4/B-VHQ/Chroma Motion Trellis Respect VBV buffer unchecked The ULR one showed some blockiness only on scenechanges (I-frames), while LR was perfect. Just to have another example... EDIT: the blockiness happens on ALL scenechanges with ULR, so P and B frames after every I-frame are affected by a side-effect, being these based on a bad I-frame... Attached Images __________________ Xvid fan ;) Last edited by Ark; 16th November 2004 at 21:32.