Zip GP-SUPA004, Инструкция по эксплуатации

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Index
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Video Quality
If you set the Bitrate Control to VBR the Video Quality drop down list will become
available. From here you can set your desired video quality and the recorder will then
capture what is achievable based on the current main stream configuration.
You have 6 options when choosing the Video Quality; Lowest , Lower , Low ,
Medium , Higher and Highest .
This needs to be used hand in hand with other mainstream settings to get the best
results. For example if you set the Video Quality to Highest but have a low bitrate you
will still capture low quality footage.
Bitrate & Bitrate Mode
How you set the Bitrate Mode changes the options available when setting the
Bitrate .
If you set the Birate Mode as Predifined you can then choose one of the commonly
used pre-set bitrates from the Bitrate drop down list.
When you set the Bitrate Mode to User-defined you can manually enter a specific
bitrate into the Bitrate column.
Just remember that the bitrate is the amount of data transferred per second so a high
bitrate will produce a high quality image with a larger file size. A low bitrate will
produce a low quality image with a smaller file size.
Enabling Audio
You can enable or disable audio recording for each channel by ticking or unticking
the
Volume check box.
I Frame Interval
I Frames is a compression technique used to create smaller video files. It works by
taking one key frame called an I Frame which the recorder will then use as a
reference point. For each frame after the I Frame the recorder will only capture parts
of the image which have changed rather than capturing the entire image.
With the I Frame Interval you set how often a new I Frame is captured by setting the
number of frames between each I Frame. Setting the interval too low and the I Frame
will become ineffective as there is such a short time between each reference point.
On the other hand, if the interval is too high so much may have changed between the I
Frame and the current frame that the recorder is effectively capturing and entire new
image anyway.