Hello,
I am experimenting with hardware H.264 encoding using ffmpeg's QSV encoder. Encoding seems to work fine but I can not get quality information from the generated bitstream. pic_init_qp_minus26 is set to 0, which is expected for bitrate-controlled quality I guess and slice_qp_delta is always zero regardless of the combination of bitrate/reolution set. I tried both CBR and VBR rate control algorithms. I use SDK2017Production16.5.
How do I make QSV provide per-slice QP?
I just started working with H.264, so if the question is totally off - I'd appreciate any other pointers for measuring quality of encoded stream. Thank you