public Builder clearVbvSizeBits() {
        bitField0_ = (bitField0_ & ~0x00000800);
        vbvSizeBits_ = 0;
        onChanged();
        return this;
      }
<pre>
Size of the Video Buffering Verifier (VBV) buffer in bits. Must be
greater than zero. The default is equal to `VideoStream.bitrate_bps`.
</pre>

<code>int32 vbv_size_bits = 12;</code>

@return This builder for chaining.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/VideoStream.java