@java.lang.Override
    public com.google.protobuf.ByteString getRateControlModeBytes() {
      java.lang.Object ref = rateControlMode_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        rateControlMode_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Specify the `rate_control_mode`. The default is `vbr`.

Supported rate control modes:

- `vbr` - variable bitrate
</pre>

<code>string rate_control_mode = 6;</code>

@return The bytes for rateControlMode.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/VideoStream.java