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The sources consist of a 4.5 minute sequence of NTSC DV clips with two crossfades and two overlays (a 5 second fadein/fadeout *.tga title at both ends and a rotating 3D corner bug running throughout).
Settings (including some in Advanced):
7500 kbps 2-pass VBR, Quality = 100, DC=10
29.970 fps Lower field first
10 GOP = IBPBPBPBPB (Closed GOP)
Sequence headers ON
Dolby Digital 2/0 224 kbps
Bitrate Viewer shows the following (lower Quantization = better quality);
1. Pretty flat graphs save for the low Q during effects, which is good.
2. Frame rate = 29.970 fps (as set)
3. Nominal bitrate = 7500 (as set)
4. Peak bitrate = 7387 (MSPro default w/7500 nominal = 7425)
5. Minimum bitrate = 6610 (MSPro default w/7500 nominal = 5250)
6. DCT = 10 (Advanced setting preserved)
7. GOP = IBPBPBPBPB & closed (Advanced settings preserved)
8. Sequence headers = ON (Advanced settings preserved)
9. VBV buffer = 112 (as expected)
10. Average Q = 5.35 (as expected)
11. Peak Q = 6.75 (as expected)
12. Minimum Q = 4.40 (higher quality than expected)
Ran it in both Win2K SP4 and WinXP SP1 with identical results. The quality of the exported file is VERY good and it plays back smoothly.
The one oddity I see is a bitrate overshoot of the minimum bitrate setting, but this may be a blessing in disguise when it comes to marginal quality sources.
Dr. Mordrid
Settings (including some in Advanced):
7500 kbps 2-pass VBR, Quality = 100, DC=10
29.970 fps Lower field first
10 GOP = IBPBPBPBPB (Closed GOP)
Sequence headers ON
Dolby Digital 2/0 224 kbps
Bitrate Viewer shows the following (lower Quantization = better quality);
1. Pretty flat graphs save for the low Q during effects, which is good.
2. Frame rate = 29.970 fps (as set)
3. Nominal bitrate = 7500 (as set)
4. Peak bitrate = 7387 (MSPro default w/7500 nominal = 7425)
5. Minimum bitrate = 6610 (MSPro default w/7500 nominal = 5250)
6. DCT = 10 (Advanced setting preserved)
7. GOP = IBPBPBPBPB & closed (Advanced settings preserved)
8. Sequence headers = ON (Advanced settings preserved)
9. VBV buffer = 112 (as expected)
10. Average Q = 5.35 (as expected)
11. Peak Q = 6.75 (as expected)
12. Minimum Q = 4.40 (higher quality than expected)
Ran it in both Win2K SP4 and WinXP SP1 with identical results. The quality of the exported file is VERY good and it plays back smoothly.
The one oddity I see is a bitrate overshoot of the minimum bitrate setting, but this may be a blessing in disguise when it comes to marginal quality sources.
Dr. Mordrid