Quote:
Originally Posted by weaver4
I did several movies with XviD single pass quantizer of 3.0. When I put the latest version of DRFAnalyzer on it shows that DRF of 3 for 50.9% and DRF of 4 for 49.1% of the frames. I encoded several movies the same way with the same results.
When I encode the movie in DivX, Quantizer of 4 the DRF is 4 for all the frames.
Is this what I should be expected?
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It's probably not ideal to compare one at a certain quant and then another at a different quant.
I just did a little clip with both codecs at Q4.0 and got:
DIVX
Frame Type Statistics :
I Frames: 2.05%
P Frames: 58.94%
B Frames: 39.01%
S Frames: 0.00%
N Frames: 0.00%
(More Advanced Codecs use B and S frames)
Frame Quality Statistics :
DRF=1&2: 0 0.0%
DRF=3: 0 0.0%
DRF=4: 1408 60.0%
DRF=5: 0 0.0%
DRF=6: 933 39.8%
DRF=7: 0 0.0%
DRF=8: 2 0.1%
DRF=9: 2 0.1%
DRF>9: 0 0.0%
XVID
Frame Type Statistics :
I Frames: 1.50%
P Frames: 50.25%
B Frames: 48.25%
S Frames: 0.00%
N Frames: 0.00%
(More Advanced Codecs use B and S frames)
Frame Quality Statistics :
DRF=1&2: 0 0.0%
DRF=3: 0 0.0%
DRF=4: 1203 51.0%
DRF=5: 0 0.0%
DRF=6: 1155 49.0%
DRF=7: 0 0.0%
DRF=8: 0 0.0%
DRF=9: 0 0.0%
DRF>9: 0 0.0%
You're not going to get constant 4 because of b-frames and/or b-frame offset ratio's. Don't know why you got a constant quant with divx.... did you use avi.NET on both tests? use same settings e.t.c. for both. Both my above tests were in 'normal' mode, not HQ.