@java.lang.Override
  public com.google.protobuf.ByteString getContainerBytes() {
    java.lang.Object ref = container_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      container_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<pre>
The container format. The default is `mp4`

Supported container formats:

- `ts`
- `fmp4`- the corresponding file extension is `.m4s`
- `mp4`
- `vtt`

See also:
[Supported input and output
formats](https://cloud.google.com/transcoder/docs/concepts/supported-input-and-output-formats)
</pre>

<code>string container = 3;</code>

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