@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (widthPixels_ != 0) {
        output.writeInt32(1, widthPixels_);
      }
      if (heightPixels_ != 0) {
        output.writeInt32(2, heightPixels_);
      }
      if (java.lang.Double.doubleToRawLongBits(frameRate_) != 0) {
        output.writeDouble(3, frameRate_);
      }
      if (bitrateBps_ != 0) {
        output.writeInt32(4, bitrateBps_);
      }
      if (allowOpenGop_ != false) {
        output.writeBool(6, allowOpenGop_);
      }
      if (gopModeCase_ == 7) {
        output.writeInt32(7, (int) ((java.lang.Integer) gopMode_));
      }
      if (gopModeCase_ == 8) {
        output.writeMessage(8, (com.google.protobuf.Duration) gopMode_);
      }
      if (vbvSizeBits_ != 0) {
        output.writeInt32(9, vbvSizeBits_);
      }
      if (vbvFullnessBits_ != 0) {
        output.writeInt32(10, vbvFullnessBits_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(entropyCoder_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 11, entropyCoder_);
      }
      if (bPyramid_ != false) {
        output.writeBool(12, bPyramid_);
      }
      if (bFrameCount_ != 0) {
        output.writeInt32(13, bFrameCount_);
      }
      if (java.lang.Double.doubleToRawLongBits(aqStrength_) != 0) {
        output.writeDouble(14, aqStrength_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(profile_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 15, profile_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(tune_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 16, tune_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
Enforces the specified codec tune. The available options are
[FFmpeg-compatible Encode
Options](https://trac.ffmpeg.org/wiki/Encode/H.264#Tune)
Note that certain values for this field may cause the transcoder to
override other fields you set in the
[H264CodecSettings][google.cloud.video.livestream.v1.VideoStream.H264CodecSettings]
message.
</pre>

<code>string tune = 16;</code>

@return The bytes for tune.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/VideoStream.java