Chapter 3 ’Web User Graphical Interface’ — Workflow Library
310 Electra VS
-
Version 05.10
User Manual - Rev. A
Level
: select from the drop-down list the level you wish to apply:
Main, High, Auto.
Frame structure
: choose from the drop-down list the way you want
to handle interlaced streams. Possible options are:
Progressive
: the whole frame is encoded. This mode is suitable
for 720p and Web TV.
Interlace:
fields are encoded separately. This mode is suitable
for SD and 1080i.
Make sure that the
Frame structure
parameter respects the format
of the input connected to the processing component.
Display Aspect Ratio
: leave to
Auto
to compute automatically the
display aspect ratio from the input video one and take into account the
video processing you may have added (clipping, for example). If you
want to force the ratio, enter it manually in the editable list (for
instance: 16:9 and 1.33).
I period
: maximum size of the GOP.
P period
:
1
if the GOP contains no B frame
2
if a B frame is present between each P frame
3
if two B frames are present between each P frame
etc.
Adaptive GOP
: if set to false, GOPs always have the same structure.
If set to true, the scene cut detection feature is used and the GOP
structure is modified consequently. Adaptive GOP is always the best
choice regarding video quality, even for Web TV adaptive bitrates.
Coder delay
: this parameter can have 3 values:
Standard
: the coder delay is 53 frames. It gives the highest video
quality.
Short
: the coder delay is 39 frames.
Ultra-short
: the coder delay is 25 frames. There is an impact on
video quality.
Note: Decoder Delay is set to 1 second whatever the coder delay.
Closed caption
: set to Insert closed caption if you want closed
captions that are present in the incoming video stream to be collected
and integrated in output.
The adaptive mode uses more CPU than the other modes.
Consequently, you can make less MPEG-2 encodings on a machine
in this mode.
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