Dump hevc average frame QPs?

[Blue_MiSfit]

Is anyone aware of a tool (ideally FOSS) that can take in an HEVC bitstream and output a list of average frame QPs?

Looks like the bits and pieces you need to do this are in libav* libraries in ffmpeg, but it's not a feature yet.

[TomV]

Any HEVC decoder will know the QP values used for each slice, and for each CU. The HM reference decoder can output this info. Beamr's HEVC decoder can output slice QPs. I would imagine the open source OpenHEVC decoder from GPAC (I think this is the decoder used in FFMPEG, possibly with some patches) could dump this info also... but I have always use my own decoders, so I'm not familiar with the syntax.