H264, also known as MPEG-4 Part 10, or Advanced Video Coding (MPEG-4 AVC), is one of the most commonly used encoders. dBpoweramp writes audio as AAC.

Extension: .mp4


Compression Options

A quality slider chooses the encoding quality, or bit rate, the drop combo below the slider offers 4 types of encoding:

• Constant Bit Rate a fixed bit rate is used through out the encoding,
• Average Bit Rate like Constant Bit Rate except there is some encoding flexibility, on difficult parts a higher bit rate is used, overall though the bit rate averages out to the requested value,
• Constant Quality a desired quality achieved throughout the encoding process, by varying the bit rate, this is the recommended mode for most people.
• Lossless encodes the video without loss of quality, expect the end files to be large, test on players to ensure compatibility.

The advanced options page offers Tuning for specific video types (animation, film, etc), and a quality preset which sets how much effort goes into compressing the video.