public Builder mergeInterval(com.google.protobuf.Duration value) {
      if (intervalBuilder_ == null) {
        if (extractionStrategyCase_ == 10
            && extractionStrategy_ != com.google.protobuf.Duration.getDefaultInstance()) {
          extractionStrategy_ =
              com.google.protobuf.Duration.newBuilder(
                      (com.google.protobuf.Duration) extractionStrategy_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          extractionStrategy_ = value;
        }
        onChanged();
      } else {
        if (extractionStrategyCase_ == 10) {
          intervalBuilder_.mergeFrom(value);
        } else {
          intervalBuilder_.setMessage(value);
        }
      }
      extractionStrategyCase_ = 10;
      return this;
    }
<pre>
Starting from `0s`, create sprites at regular intervals. Specify the
interval value in seconds.
</pre>

<code>.google.protobuf.Duration interval = 10;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/SpriteSheet.java