Epiphan VGADVI Recorder - Manual (Page 76)

VGADVI Recorder User Guide 3-2 Fine-tune channel configuration
5. Click Video encoding profile to limit or include video formats that are supported. Choose one of the
following:
Value Description
Baseline Choose this option when streaming to an application that requires robustness
and cannot tolerate data loss, for example video-conferencing.
Main Choose this option for standard-definition broadcasts. This is the default.
Default Choose this option when video is viewed for broadcast and disk storage
applications, particularly for high definition television application such as Blu-ray
disk storage format and HDTV broadcast service.
Video encoding profile and preset can be set when H.264 codec is selected.
6. Check the check box for Enhanced compatibility mode (h.264 slicing for RTP) to provide operating
stability when the video and audio stream are not supported by the viewer’s equipment. When this
feature is enabled, each frame is sub divided into one or more slices. Each slice is self-contained, all
information for decoding is available within the slice. This is valuable when packet size exceeds the
maximum allowable amount. Therefore losing a slice will not impact the entire frame.
Packet slicing adds to overhead and impacts compression efficiency. A value can be set
when H.264 codec is selected.
7. Set the Rate Control mode when H.264 and MPEG4 codecs are set. The values define how strictly the
codec adheres to the specified bitrate. Choose one of the following options from the Rate control mode
drop-down menu.
Value Description
Relaxed Choose Relaxed when streaming multimedia content and there is available
bandwidth, the quality of the multimedia stream must be constant and the bit
rate can vary.
Balanced Choose Balanced when streaming multimedia content that has periods of high
and low bit rates. The target bit rate is met by averaging the bit rate.
Strong Choose Strong when streaming multimedia content when limited bandwidth is
available and a constant frame rate is required. There may be a decrease in video
quality if there is a lot of motion.
8. Click Apply.
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