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Thread: Stream produced from Transrate template have no video content (audio only)

  1. #1

    Default Stream produced from Transrate template have no video content (audio only)

    I am working to get a series of live streams run through the Transcoder to product multiple bitrates. For now, I am trying to use the default Transrate template.

    I followed the instructions & video tutorial and everything appears to be setup properly, however the streams produced do not display any video content. The screen remains black, but the proper audio can be heard.

    Has anyone encountered this?
    There are no odd errors in the logs, in fact the transcoder appears to be working as expected:

    2015-07-06      14:33:38        UTC     decoder-video-start     transcoder      INFO    200     999     {codec:H264, profile:Main, level:3.1, frameSize:1280x720, displaySize:1280x720, frameRate:30.0}
    2015-07-06      14:33:38        UTC     encoder-video-start     transcoder      INFO    200     999     {name:"240p", bitrate:350000, codec:H264, profile:Baseline, level:3.0, frameSize:426x240, displaySize:426x240, frameRate:30.0}
    2015-07-06      14:33:38        UTC     encoder-video-start     transcoder      INFO    200     999     {name:"160p", bitrate:200000, codec:H264, profile:Baseline, level:2.1, frameSize:284x160, displaySize:284x160, frameRate:30.0}
    2015-07-06      14:33:38        UTC     encoder-video-start     transcoder      INFO    200     999     {name:"360p", bitrate:850000, codec:H264, profile:Main, level:3.1, frameSize:640x360, displaySize:640x360, frameRate:30.0}

  2. #2

    Default

    Hi there.

    Please double check your template settings, as well as the video codec to make sure it is supported by the Wowza Transcoder for transrate.

    If everything looks good and the problem persists, please open a ticket with support by following this guide and sending requested information to support@wowza.com
    How to create a compressed zip file in Windows, OS X, and Linux

    Regards,

    Salvadore

  3. #3

    Default

    Looking at the codec details in VLC, it appears that my source videos are encoded in H.264 (MPEG-4 Part 10), but the transcoder only supports MPEG-4 Part 2? Unless in this context H.264 is synonymous MP4 Part 10?


  4. #4

    Default

    No, the video codec is not the problem here. mpeg4 part 10 = h.264, and is supported. MPEG4 Part 2 is not supported, except for decode by the Wowza Transcoder.

    I would suggest opening a ticket as described above.

    Regards,

    Salvadore

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