Zixi Broadcaster offers live transcoding, enabling users to create multiple bitrate streams from a single input stream.
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- 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
- Audio Encoding – AAC only-LC, AAC only-HEv1, Opus; Pass through – any audio codec (MPEG1/2 / AAC / AC-3)
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- In the Zixi Broadcaster Inputs page, click the desired incoming stream that you want to transcode.
- Click
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.
- Enter the unique Stream I.D., which will correspond to the new transcoded input that will be added.
- Under Stream Parameters, select one of the following options in Video Profile:
- Keep original stream – the stream will not be modified.
- Remove stream – the output will not include the video channel (audio only).
- Custom profile – select one of the custom profiles that have been configured in the transcoder.
- Under Stream Parameters, select one of the following options in Audio Profile:
- Keep original stream – the stream will not be modified.
- Remove stream – the output will not include the audio channel (video only).
- Custom profile – select one of the custom profiles that have been configured in the transcoder.
- If you want to enable hardware acceleration, you have installed a GPU hardware accelerator on your transcoder you can select the Use hardware acceleration checkbox to enable acceleration.
- If you want to ensure all PIDs (process IDswhich is used to distinguish between packets containing different types of information) are passed on through the transcoder, select the Pass all PIDs checkbox. To learn more about PIDs, see Packet Identifiers (PID).
- In the Smoothing buffer field, enter the buffering time in milliseconds. The buffering helps smoothen the stream, however it will delay its transfer by the duration that is specified in this field. Default: 1500 ms.
- Select the relevant additional parameters as described below.
- 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.
Parameters Table
Parameter | Description |
|---|---|
| Enable time shift | Enables a delayed transmission of this input. |
| Maximum delay [hh:mm:ss] (for Time Shift enabled) | Specify the maximum time delay of this input. |
| Transmit as multicast | Enables transmission of this stream’s outputs as multicast. A Zixi Receiver will receive it in multicast (unless it is out of the LAN in which case it will receive as unicast). You can also force Multicast only outputs. Requires enabling Multicast Pull in the Settings. |
| Multicast-Only (for Multicast enabled) | If desired, specify multicast only outputs. |
| Enable Encryption | Encrypts the Input stream. For more information, |
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| see Encrypting an Input Stream in Zixi Broadcaster. | |
Encryption type (for Encryption enabled) | Specify the type of Encryption (AES 128/192/256). |
Encryption key (for Encryption enabled) | Click Generate to generate an encryption key. The generated encryption key must be sent to the end-user to decipher the received encoded stream. |
| Recording parameters | |
|---|---|
Max recorded file duration [hours] | Specify the maximum time allotted for recording a video stream. Default: 2 hours |
Keep recorded files for [hours] | Specify the maximum time for storing the recording. |
| Custom Path | Optionally specify a storage location for the recorded files that is relative to the root folder. This location bypasses the location specified as the root folder in the Settings > General screen. |
| File Name Template | Specify the file name pattern that Zixi will use to generate when saving the recorded content. A separate file will be generated for each recording up to the time specified in the Max recorded file duration parameter (see above). After this duration a new file will be generated. The file name pattern can include any string and up to five variables listed below. Only the %T=HH.MM.SS creation time is mandatory. You can change the order of these variables and add text as long as you maintain the legitimate structure of the file in Linux and Windows: %S=stream id - optional. %Y=year - optional %M=month - optional %D=day - optional %T=HH.MM.SS creation time - mandatory For example, the following pattern %Y_recording%T.ts will generate the following file name2017_recording15:32:35.ts. |