Transcode's options and actual resoltions

Wowza Streaming Engine
1

Hello!

I’m sending a RTMP stream from FMLE to Wowza with 1280x720 Resolution and 15.00 fps. I want to receive RTMP streams from Wowza with different qualities. So, I have created the transcode.xml to do it. Here it is:

<Root>
  <Transcode>
    <Description>transcode.xml</Description>
    <Encodes>
      <Encode>
        <Enable>true</Enable>
        <Name>max</Name>
        <StreamName>mp4:${SourceStreamName}_max</StreamName>
        <Video>
          <Codec>H.264</Codec>
          <Implementation>NVENC</Implementation>
          <GPUID>-1</GPUID>
          <Bitrate>921600</Bitrate>
          <FrameSize>
            <FitMode>fit-height</FitMode>
            <Width>1280</Width>
            <Height>720</Height>
          </FrameSize>
          <Profile>main</Profile>
          <KeyFrameInterval>
            <FollowSource>true</FollowSource>
          </KeyFrameInterval>
          <Parameters>
          </Parameters>
        </Video>
        <Audio>
          <Codec>AAC</Codec>
          <Bitrate>192000</Bitrate>
          <Parameters>
          </Parameters>
        </Audio>
        <Properties>
        </Properties>
      </Encode>
      <Encode>
        <Enable>true</Enable>
        <Name>high</Name>
        <StreamName>mp4:${SourceStreamName}_high</StreamName>
        <Video>
          <Codec>H.264</Codec>
          <Implementation>NVENC</Implementation>
          <GPUID>-1</GPUID>
          <Bitrate>950000</Bitrate>
          <FrameSize>
            <FitMode>fit-height</FitMode>
            <Width>854</Width>
            <Height>480</Height>
          </FrameSize>
          <Profile>main</Profile>
          <KeyFrameInterval>
            <FollowSource>true</FollowSource>
          </KeyFrameInterval>
          <Parameters>
          </Parameters>
        </Video>
        <Audio>
          <Codec>AAC</Codec>
          <Bitrate>128000</Bitrate>
          <Parameters>
          </Parameters>
        </Audio>
        <Properties>
        </Properties>
      </Encode>
      <Encode>
        <Enable>true</Enable>
        <Name>medium</Name>
        <StreamName>mp4:${SourceStreamName}_medium</StreamName>
        <Video>
          <Codec>H.264</Codec>
          <Implementation>NVENC</Implementation>
          <GPUID>-1</GPUID>
          <Bitrate>440000</Bitrate>
          <FrameSize>
            <FitMode>fit-height</FitMode>
            <Width>640</Width>
            <Height>480</Height>
          </FrameSize>
          <Profile>main</Profile>
          <KeyFrameInterval>
            <FollowSource>true</FollowSource>
          </KeyFrameInterval>
          <Parameters>
          </Parameters>
        </Video>
        <Audio>
          <Codec>AAC</Codec>
          <Bitrate>64000</Bitrate>
          <Parameters>
          </Parameters>
        </Audio>
        <Properties>
        </Properties>
      </Encode>
      <Encode>
        <Enable>true</Enable>
        <Name>low</Name>
        <StreamName>mp4:${SourceStreamName}_low</StreamName>
        <Video>
          <Codec>Disable</Codec>
          <Implementation>NVENC</Implementation>
          <GPUID>-1</GPUID>
          <Bitrate></Bitrate>
          <Profile></Profile>
          <KeyFrameInterval>
            <FollowSource>true</FollowSource>
          </KeyFrameInterval>
          <Parameters>
          </Parameters>
        </Video>
        <Audio>
          <Codec>AAC</Codec>
          <Bitrate>64000</Bitrate>
          <Parameters>
          </Parameters>
        </Audio>
        <Properties>
        </Properties>
      </Encode>
    </Encodes>
  </Transcode>
</Root>

As you can see, the max quality has 1280x720 resolution and Bitrate 921600. But If I get the max quality stream via curl, it’s not the same as transcode.xml’s max quality:

$ curl http://my.example.net/live/_definst_/test123_max/playlist.m3u8
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=1423402,CODECS="avc1.77.31",RESOLUTION=960x720
chunklist_w1743338469.m3u8

So, the actual resolution is 960x720. Why is it happening?

2

Hi,

Please open a ticket with our support team so we can troubleshoot this issue further.

When creating a ticket, our support team will need a ZIP file the following directories:

[Wowza-Install]/conf/

[Wowza-Install]/logs/

[Wowza-Install]/transcoder/

If you are not sure how to get this information please see the following tutorial.

How to create a compressed zip file in Windows, OS X, and Linux

The Wowza log file should show Wowza Streaming Engine starting and the source being published so the transcoder starts, and creates this encode.

Note that the bitrate of the stream is both audio and video which should be around 1113600 and this will vary as most encoders have a variable bitrate.

Regards,

Jason