Streams section
The following fields relate to the encoding of the video, audio, and captions streams (encodes) in the output.
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Stream settings section
For information about creating encodes, see the following sections:
Packaging of video encodes and audio-only encodes
MediaLive handles the packaging of encodes within each output as follows:
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If an output contains both video and audio (and optionally captions), the audio rendition is marked as
program audio. -
If an output doesn't contain video, the audio rendition is marked as
audio onlyand each audio encode is marked asALTERNATE_AUDIO_NOT_AUTO_SELECT.
Setting the width and height of the video
This section refers to the fields in Stream settings, Video.
You must specify values in Width and Height. The MediaPackage output group doesn't support leaving these fields blank to use the width and height from the source video.
Setting the aspect ratio of the video
This section refers to the fields in Stream settings, Video, Aspect ratio.
You must set PAR control to
SPECIFIED. The MediaPackage
output group doesn't support setting the aspect ratio of
the output to follow the source video. When you choose
SPECIFIED, you must complete
PAR numerator and PAR
denominator. You can set the
AFD fields as you want.
Setting the frame rate of the video
This section refers to the fields in Stream settings, Video, Frame rate.
You must set Framerate control to
SPECIFIED. The MediaPackage
output group doesn't support setting the frame rate of
the output to follow the source video. When you choose
SPECIFIED, you must complete
Framerate numerator and
Framerate denominator. You can
set the scan type as you want; it doesn't relate
directly to the frame rate.
Setting up for GOPs and segments
This section refers to the fields in Stream settings, Video, GOP structure.
For the video, you must set the GOP size to ensure that the output from MediaLive has a segment size that is close to the segment size that you specify in MediaPackage. MediaLive and MediaPackage work together to obtain a final segment size. The logic is as follows:
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In MediaLive you specify the GOP size and GOP size units fields.
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MediaLive calculates the GOP duration, taking into account the frame rate that you specify in the Video section of the Output page.
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In MediaPackage you specify the segment duration. You always specify a whole number. This segment duration is the desired minimum duration.
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When MediaPackage receives the video from MediaLive, it determines how much it must adjust the segment duration to fit a whole number of GOPs into the segment. The segment duration can only be adjusted up, never down. This adjusted segment duration appears in the manifest that MediaPackage produces.
Example 1
Assume that in MediaLive you set the GOP size to 60 frames. You set the frame rate to 29.97. These two values result in a GOP duration of 2.002 seconds.
Assume that in MediaPackage you set the segment duration to 6 seconds. This segment duration is the desired minimum duration.
When MediaPackage receives the video from MediaLive, it determines how much it must adjust the segment duration to fit a whole number of GOPs into the segment. In this case, the segment duration must be adjusted to 6.006 seconds (three GOPs, where each GOP is 2.002 seconds long).
Example 2
Assume that in MediaLive, you set the GOP size to 90 frames. You set the frame rate to 30. These two values result in a GOP duration of 3 seconds.
Assume that in MediaPackage you set the segment duration to 4 seconds. This segment duration is the desired minimum duration.
When MediaPackage receives the video from MediaLive, it determines how much it must adjust the segment duration to fit a whole number of GOPs into the segment. In this case, the segment duration must be adjusted to 6 seconds (two GOPs, where each GOP is 3 seconds long).
Other encode fields
For information about the fields in each type of encode, see the following sections:
