Appendix d: hints for minimizing bitrates, 4 appendix d: hints for minimizing bitrates – QVidium QVENC Encoder v17 User Manual
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User’s Manual v.17
QVidium
®
H.264 HD Video Codecs
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Copyright 2011-2015 QVidium
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Technologies, Inc.
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14.4 Appendix D: Hints for Minimizing Bitrates
Audio Notes
To minimize wasted audio overhead and minimize audio bitrates, you should set one of the
following:
1. Set the Audio Bitrate to 56 Kbps and the Sample Rate to 48 KHz. Encoding MUST be AAC
(results in 63 Kbps); or
2. Set the Audio Bitrate to 64 Kbps and the Sample Rate to 32 KHz. Any audio encoding
(results in 84 Kbps)
At low bitrates, we have found that MPEG1/Layer2 Audio Encoding sounds best.
(Note: setting MPEG1/Layer2 to 56 Kbps results in a total of 126 Kbps audio overhead.)
Low-Bitrate Encoder Settings
On the Encoder menu:
1. Click on "Default" to reset the Encoder Profile.
2. Then set the following:
On basic tab:
On Advanced Encoding tab:
Video Bit Rate: 200000
Stream Mode: Capped VBR
Video Encoding: H264
Video Filtering: On
Audio Bit Rate: 64000
Video Frame Rate: Half
Audio Encoding: MPEG1/Layer2
Video Resolution: CIF
Audio Sampling Rate: 48000