以下は、ビットレートが同じ場合の設定例です。”速度と画質に関わるオプション”のみ。
素材映像は720x448 @30000/1001 fps , ビットレートは900kbps、マシンはAMD-64 3400+（2400 Mhz）の64 bitモードです。それぞれの設定で計測したエンコード速度（frames per seconds）と“very high quality“ に対するPSNR の低下分（dB）も書いてあります。素材、マシン、それから開発の進捗で結果は全く変わる事もあります。
| Description | Encoding options | speed (in fps) |
Relative PSNR loss (in dB) |
|---|---|---|---|
| Very high quality | subq=6:partitions=all:8x8dct:me=umh:frameref=5:bframes=3:b_pyramid:weight_b | 6fps | 0dB |
| high quality | subq=5:8x8dct:frameref=2:bframes=3:b_pyramid:weight_b | 13fps | -0.89dB |
| Fast | subq=4:bframes=2:b_pyramid:weight_b | 17fps | -1.48dB |
The following settings are examples of different encoding option combinations that affect the speed vs quality tradeoff at the same target bitrate.
All the encoding settings were tested on a 720x448 @30000/1001 fps video sample, the target bitrate was 900kbps, and the machine was an AMD-64 3400+ at 2400 MHz in 64 bits mode. Each encoding setting features the measured encoding speed (in frames per second) and the PSNR loss (in dB) compared to the "very high quality" setting. Please understand that depending on your source, your machine type and development advancements, you may get very different results.
