Encoder Options for Mpeg Files
Mpeg files are saved using either MPEG1 or MPEG2 compression.
- MPEG1 is a constant bitrate format and can produce artifacts in high action scenes. MPEG1 it natively supported in all versions of Windows so it is a good choice for maximum compatibility.
- MPEG2 is a variable bitrate format and will produce superior output for action scenes. MPEG2 it NOT natively supported by Windows and you require a third-party codec to be installed to play it. Most DVD Movie player software installs the appropriate codec into Windows.
Here you specify the bitrate the video is encoded at. The higher the value the better the quality of the picture and the less artifacts (macro blocks and blurring). For example a DVD is encoded at 9000kbps. A VCD using MPEG1 is encoded at 1152kbps. You should experiment with this. Please note that higher values result in a larger file size.
- Average bitrate is the mean bit rate, and is the main value that affects quality. Maximum bitrate should generally exceed this, but no set margin is required; the Average and Maximum bitrate can safely be the same.
- Maximum bitrate is the absolute maximum. It does not majorly affect quality but some formats have set values that must not be exceeded (e.g. 10 megabits for DVD video). Sometimes if your maximum bitrate is too low then you will get macro block effects, in which case you should increase BOTH values.
The audio is encoded using Mpeg 1 Layer 2 codec. You can specify a variety of bitrates but we normally suggest 64 (low quality, low file size) or 128 (high quality, larger file size).