public Builder setFileNameBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      fileName_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
The name of the generated file. The default is `MuxStream.key` with the
extension suffix corresponding to the `MuxStream.container`.

Individual segments also have an incremental 10-digit zero-padded suffix
starting from 0 before the extension, such as `mux_stream0000000123.ts`.
</pre>

<code>string file_name = 2;</code>

@param value The bytes for fileName to set.
@return This builder for chaining.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/MuxStream.java