@java.lang.Override
      public int getOutputChannel() {
        return outputChannel_;
      }
<pre>
Required. The zero-based index of the channel in the output audio stream.
</pre>

<code>int32 output_channel = 5 [(.google.api.field_behavior) = REQUIRED];</code>

@return The outputChannel.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/AudioStream.java