public com.google.protobuf.ByteString getCodecBytes() {
      java.lang.Object ref = codec_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        codec_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
The codec for this audio stream. The default is `aac`.

Supported audio codecs:

- `aac`
</pre>

<code>string codec = 1;</code>

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