[Question]: Bitrate : Pre-Processing Component

[TV4ELP]

I may have missed it in the PreProcessing Doc, but what are these options for:

AMF_PP_TARGET_BITRATE

AMF_PP_ADAPTIVE_FILTER_ENABLE

The strength and quality all make sense and i understand roughly what they are doing. What relevance does the target bitrate have however? There is a default of 2000000 bit.

Follow up question, would it make sense to adjust the bitrate down for encoding with low bitrates?

Also, the Adaptive Filter, is this a scene based/black based filter or something completly different?

Thanks in advance!

[MikhailAMD]

Sorry, missed this one. Asked to update documentation.

[StevenXiao-AMD]

Please see the bold italic font answer:

The strength and quality all make sense and i understand roughly what they are doing. What relevance does the target bitrate have however? There is a default of 2000000 bit.
the target bitrate is a good indicator of how much detail should be removed from the source prior to encoding. For low-bitrate encoding, removing more fine details through pre-filtering can reduce high-frequency residuals, allowing the encoder to allocate bits more efficiently and improving perceptual quality. Conversely, at higher bitrates, little or no pre-filtering should be applied to preserve source details.

Follow up question, would it make sense to adjust the bitrate down for encoding with low bitrates?
Yes.

Also, the Adaptive Filter, is this a scene based/black based filter or something completly different?
It is an edge preserving gaussian filter.