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The following table summarizes the command-line options that are required to implement a CBR or VBR encoding mode for video content.
Mode | Command |
One-pass CBR | -v_mode 0, -v_bitrate, -v_buffer, v_quality |
Two-pass CBR | -v_mode 1, -v_bitrate, -v_buffer, v_quality |
Quality-based VBR (one-pass) |
-v_mode 2, -v_quality |
Bit rate-based VBR (two-pass) |
-v_mode 3, -v_bitrate |
Peak bit rate-based VBR (two-pass) |
-v_mode 4, -v_bitrate, (-v_peakbitrate and -v_peakbuffer are optional; if you do not specify values, default values are used) |
The following table summarizes the command-line options that are required to implement each CBR and VBR mode for audio content.
Mode | Command |
One-pass CBR | -a_mode 0, -a_setting |
Two-pass CBR | -a_mode 1, -a_setting |
Quality-based VBR (one-pass) |
-a_mode 2, -a_setting (the first number represents the target quality; use the format Qvalue) |
Bit rate-based VBR (two-pass) |
-a_mode 3, -a_setting |
Peak bit rate-based VBR (two-pass) |
-a_mode 4, -a_setting, (-a_peakbitrate and -a_peakbuffer are optional; if you do not specify values, default values are used) |
You can mix encoding modes in a session. For example, you can use two-pass CBR encoding for your audio and quality-based VBR encoding for your video.