public Builder clearCrfLevel() {
        bitField0_ = (bitField0_ & ~0x00000040);
        crfLevel_ = 0;
        onChanged();
        return this;
      }
<pre>
Target CRF level. Must be between 10 and 36, where 10 is the highest
quality and 36 is the most efficient compression. The default is 21.

**Note:** This field is not supported.
</pre>

<code>int32 crf_level = 7;</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