[Question]: QP_I not works on h264

[MemeTao]

Question 1: How to set qp_i for h264?

I set QP_I to 22, but the QP value of output frame not equal to 22:

here is my code:

set_avc_property(amf_encoder_, QP_I, 22);
amf_encoder_->Init();   // rc = AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_CBR;

and i get qp value:

  uint64_t average_qp = 0;
  pkt->GetProperty(AMF_VIDEO_ENCODER_STATISTIC_AVERAGE_QP, &average_qp);

Windows 11 && AMD Radeon RX 6950 XT.

Question 2: There are min_qp_i and max_qp_i in hevc, but not h264

[lextra2]

rc = AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_CBR

Have you tried using
AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_CONSTANT_QP

[MikhailAMD]

Yes, fixed QP is for CQP rate control method.
h264 only have AMF_VIDEO_ENCODER_MIN_QP and AMF_VIDEO_ENCODER_MAX_QP, no separation by frame type.

[MemeTao]

Thanks for replay.