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Transcoding an Input Stream

Transcoding an Input Stream

30 Jan 2020

Zixi Broadcaster offers live transcoding, enabling users to create multiple bitrate streams from a single input stream.

Supported Video and Audio formats include:

  • Video Decoding – MPEG2, H.264/AVC , H.265/HEVC

  • Video Encoding – MPEG2, H.264/AVC , H.265/HEVC

  • Audio Decoding – AAC, MPEG-1 Audio Layer I / II / III, MPEG-2 Audio Layer I / II / III, AC-3 (Dolby Digital)

  • Audio Encoding – AAC, AAC-HE (High Efficiency) and AAC-HEv2; Pass through (no encoding) – any audio codec (MPEG1/2 / AAC / AC-3, E-AC-3 (Dolby Digital Plus).

The transcoder comes with pre-set common video profiles:
1080i60 / 1080i59.94, 1080p30 / 1080p25, 720p60, 720p50 / 720p30, 576i60 / 576p25, 480i60 / 480p29.97

In order to transcode an input stream from the Inputs screen you must first configure the transcoding profiles in the Transcoder screen. For more information, see Broadcaster Transcoder section. 

To Transcode an Input Stream:

  1. In the Zixi Broadcaster Inputs page, click the desired input stream that you want to transcode.

  2. Click the 

     button on the right end of the selected row and then Transcode. The Transcode <input stream name> window with the settings of the selected input stream is displayed. 

  3. Enter the unique Stream I.D. for the new transcoded input stream.

  4. Under Stream Parameters, in the Video profile and Audio profile fields, do one of the following:

    • Select the desired Video Profile and/or Audio Profile that you have configured.

    • Select Keep original stream - if you have not configured a video or audio profile or do not want it transcoded or you want to set specific transcoding parameters for the specific stream. In this case, the video or audio input will not be transcoded.

    • Select Remove stream – you can use the transcoder to remove the video or audio track from the stream. 

  5. Fill in additional fields (see table below for additional parameters).

  6. Click OK.
    The transcoded input stream is created and appears in an embedded window labeled Transcoded sources under the original input stream from which it was created.