@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(codec_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, codec_);
    }
    if (widthPixels_ != 0) {
      output.writeInt32(2, widthPixels_);
    }
    if (heightPixels_ != 0) {
      output.writeInt32(3, heightPixels_);
    }
    if (java.lang.Double.doubleToRawLongBits(frameRate_) != 0) {
      output.writeDouble(4, frameRate_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The frame rate of the input video stream.
</pre>

<code>double frame_rate = 4;</code>

@return The frameRate.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/VideoFormat.java