public com.google.protobuf.Duration.Builder getStartTimeOffsetBuilder() {
      bitField0_ |= 0x00000001;
      onChanged();
      return getStartTimeOffsetFieldBuilder().getBuilder();
    }
<pre>
Time-offset, relative to the beginning of the video,
corresponding to the start of the segment (inclusive).
</pre>

<code>.google.protobuf.Duration start_time_offset = 1;</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1beta2/src/main/java/com/google/cloud/videointelligence/v1beta2/VideoSegment.java