Spyclops SPY-DVR4960 User Manual - Manual (Page 8)

8
3.3 Encode Set-up
*Note: If you have your target bitrate, but are having trouble achieving an acceptable quality video, you will have
to cut back in some aspect. The contributing factors that will lead to a higher video bitrate are the amount of
pixels (the resolution of the video), the frame rate, and the amount of motion present
• Channel: You can assign different settings to each channel (camera view). Remember after
choosing all the settings for each channel to hit “OK” and right click twice to save
• Stream: This is where you will set the settings for your main stream and sub stream. The main
stream is the stream you will see locally and can support “960H” encode format. Sub stream is
the stream you will see remotely from your phone so you wont need higher resolution, it
should be “CIF” format
• Encode Mode: Select “Video only” for encoding video, select “AV stream” for encoding video
and audio
• Bitrate mode: This will be dependant on your bandwidth and specific needs
Constant Bitrate
This is the default encoding mode, and
also the most basic. In this mode, the
bitrate will be the same for the whole file.
It means that each part of your video file
will be using the same number of bits.
The complex parts will be of a lower
quality than the easiest ones. The main
advantage is that the final files size won't
change and can be accurately predicted.
This mode is not recommended
Average Bitrate
In this mode, you choose a target bitrate
and the encoder will try to constantly
maintain an average bitrate while using
higher bitrates for the parts of your video
that need more bits. The result will be of
higher quality than CBR encoding while
the average file size will remain
predictable, so this mode is highly
recommended over CBR.
Variable Bitrate
In this mode, you choose the desired
quality on a scale going from 9 (lowest
quality/highest distortion) to 0 (highest
quality/lowest distortion). Then you
choose the optimal number of bits to
spend for each part. The advantage is that
you are able to specify the quality level
that you want to reach; the inconvenient
is that the final file size is totally
unpredictable.
• Encode format: For the main stream we recommend NTSC with 960H format
QCIF CIF HD1 WCIF D1 960H
NTSC 176 x 120 360 x 240 352 x 480 480 x 240 720 x 480 960 x 480
PAL 176 x 144 360 x 288 352 x 576 480 x 288 720 x 576 960 x 576
• Rate: In general, we recommend a bitrate of around 2 - 2.5 Mbps, which takes into account
the average worldwide broadband connections for video output