Manual Niagara B264 Standalone Encoder (page 35 of 120) (English)

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o If you select the 1920×1080p resolution, this field will also include an option for a

frame rate of 23.98 (Film):

 Output Resolution: Select the desired output resolution. The values in this drop-down

list are a function of the Video Input Settings, the Input Resolution and the

Frame/Field Rate. Also, please note that some resolutions require additional licensing

for the encoder. If Video Input Settings is set to Manual Selection, the following

resolutions are offered:

o Same as the input (no scaling)

o ¾ scaling from the input

o Low resolutions: 480×270, 320×240, and 320×180, progressive, at half and

quarter frame rates (not available for 1080p inputs)

o HD inputs can be scaled (and re-interlaced if necessary) to SD resolution,

anamorphic (not available for 1080p inputs)

o 720p inputs can be reduced to half frame rate (typically for Internet applications),

as follows:

 1280×720p50 is converted to 1280×720p25

 1280×720p59.94 is converted to 1280×720p29.97

 1280×720p60 is converted to 1280×720p30

o 1080i, 720p and SD inputs can be converted to SD resolution, with progressive

frame rates (ideal for computer displays), as follows:

 1080i59.94, 720p59.94, and 480i59.94 are converted to 720×480p29.97

 1080i60 and 720p60 are converted to 720×480p30

 1080i50 and 720p50 are converted to 720×576p25

The conversions from HD resolutions are done using anamorphic scaling.

o 1080i, 720p and SD

inputs can be scaled to 640×360, with progressive frame

rates, as follows:

 1080i59.94 and 480i59.94 are converted to 640×360p29.97

 720p59.94 is converted to 640×360p59.94

 1080i50 and 576i50 are converted to 640×360p25

 720p50 is converted to 640×360p50

By default, SD signals have a 4:3 aspect ratio, unless they are derived from an HD source with anamorphic scaling.

The 640×360 resolution is intended for 16:9 content. Scaling SD to 640×360 should only be done if the SD signal is

anamorphic to start with, otherwise the resulting encoded signal will have an incorrect aspect ratio.

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Niagara B264 Standalone Encoder Manual

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