Double-rate deinterlacing uses the individual interlaced fields to create frames at twice the original frame rate of the video. The advantage is that for high-motion video such as sports, motion is more fluid. The disadvantage is that the quality of each frame can be a bit lower.
To turn on double-rate deinterlacing in Transcoder, add the following parameter to the Decode/Video/Parameter section of your Transcoder template:
<Parameter> <Name>deinterlaceDoubleRate</Name> <Value>1</Value> <Type>Long</Type> </Parameter>
When enabled, you'll see the following log statement:
TranscoderWorkerVideoDecoder.init[streamname]: Double rate deinterlacing is enabled for this incoming stream.