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Senior Member
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這樣設定壓出來，XviD 的 quantizer 分佈
VHQ-1
引用:
Quantizers :
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I/P-Frame :
Quant 2 Used : 22 Times
Quant 3 Used : 129 Times
Quant 4 Used : 1079 Times
B-Frame :
Quant 7.00 Used : 99 Times
Quant 8.00 Used : 820 Times
Quant 6.00 Used : 12 Times
Quant 4.00 Used : 6 Times
Quant 5.00 Used : 2 Times
Average Quantizer : 5.581
Intra-Frame (Key-Frame) Quantizers
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Quant 2 Used : 12 Times, Percentage Used : 12.24%
Quant 3 Used : 36 Times, Percentage Used : 36.73%
Quant 4 Used : 50 Times, Percentage Used : 51.02%
Average I-Frames Quantizer : 3.388
Inter-Frame (P-Frame) Quantizers
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Quant 2 Used : 8 Times, Percentage Used : 0.71%
Quant 3 Used : 93 Times, Percentage Used : 8.23%
Quant 4 Used : 1029 Times, Percentage Used : 91.06%
Average P-Frames Quantizer : 3.904
B-Frames Quantizers
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Quant 7.00 Used : 99 Times, Percentage Used : 23.33%
Quant 8.00 Used : 820 Times, Percentage Used : 26.67%
Quant 6.00 Used : 12 Times, Percentage Used : 20.00%
Quant 4.00 Used : 6 Times, Percentage Used : 13.33%
Quant 5.00 Used : 2 Times, Percentage Used : 16.67%
Average B-Frames Quantizer : 7.837
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絕大部分的 P-frame 都是以 quantizer 4 壓縮，相對應地，B-frame 幾乎都是以 quantizer 8 壓縮。
由於限制的 quantizer 範圍太小的關係，上下震盪的幅度很小，幾乎快變成和用 quantizer 4 固定壓縮沒兩樣了 ^^;
VHQ-4 的 目標檔案大小設為 14110 Kbytes，quantizer 分佈
引用:
Quantizers :
------------------------------
I/P-Frame :
Quant 2 Used : 22 Times
Quant 3 Used : 226 Times
Quant 4 Used : 981 Times
B-Frame :
Quant 7.00 Used : 216 Times
Quant 8.00 Used : 696 Times
Quant 6.00 Used : 19 Times
Quant 4.00 Used : 6 Times
Quant 5.00 Used : 3 Times
Average Quantizer : 5.477
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平均 quantizer 較 VHQ-1 下降 0.134。 |