changing aspect ratio, GOP size and frame rate

Wowza Streaming Engine
1

Hi,

I need to change the GOP size and capped VBR of an incoming stream.

Is it possible with WOWZA? If so please let me know the configuration I need to do.

GOP

M frames

N frames

GOP mode

closed GOp

VBR

Min rate

Max rate

Thanks

Manoj

2

Hi Manoj, you will need the Wowza Transcoder for this.

You can set the bitrate and GOP, and create multiple renditions with different bitrates.

Salvadore

3

Manoj,

These settings are located in the /transcoder/templates/transrate.xml and transcode.xml files.

You can set frame size:

<FrameSize>
	<!-- letterbox, fit-width, fit-height, crop, stretch, match-source -->
	<FitMode>fit-height</FitMode>
	<Width>640</Width>
	<Height>360</Height>
	</FrameSize>

Key Frame interval:

<KeyFrameInterval>
	<FollowSource>false</FollowSource>
	<Interval>60</Interval>
	</KeyFrameInterval>

And StreamNameGroup for Variable bitrate:

<StreamNameGroups>
   <!-- Note: Play stream using stream name ngrp:[stream-name] -->
      <StreamNameGroup>
      <Name>all</Name>
      <StreamName>${SourceStreamName}_all</StreamName>
      <Members>
	<Member>
   <EncodeName>source</EncodeName>
	</Member>
	<Member>
	     <EncodeName>720p</EncodeName>
	</Member>
	<Member>
	     <EncodeName>360p</EncodeName>
	</Member>
	<Member>
	     <EncodeName>240p</EncodeName>
	</Member>
	<Member>
	    <EncodeName>160p</EncodeName>
	</Member>
	</Members>
	</StreamNameGroup>
<StreamNameGroup>

For more information you can refer to the Transcoder User Guide

Salvadore

4

Hi Salvadore,

I have the transcoder Addon too.

But I cant find documentation on how to set GOP and variable bit rates.

Could you please post me a link or a document?

Thanks

Manoj