Skip to content

vaapi: in-process RC max_qp 44→51，有上限档位能到 QP 51 硬件下限 (#33) #102

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
VallierDev merged 1 commit into from
Oct 23, 2026
+3 −1
Merged

vaapi: in-process RC max_qp 44→51，有上限档位能到 QP 51 硬件下限 (#33) #102

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 3 additions & 1 deletion c_engine/vaapi_engine.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -732,7 +732,9 @@ int vaapi_encode_frame(
rc.window_size = 1000;
rc.initial_qp = 28;
rc.min_qp = 16;
rc.max_qp = 44;
// The driver's VBR raises QP only up to max_qp; 44 blocked the capped presets from reaching
// the QP 51 hardware floor on hard content (2560x1600 testsrc2: 4.16 -> 2.60 Mbps, #33)
rc.max_qp = 51;
rc.rc_flags.bits.disable_frame_skip = 1; // a remote desktop must not drop frames silently
b.misc[b.misc_n++] = vaapi_create_misc_buffer(engine, VAEncMiscParameterTypeRateControl, &rc, sizeof(rc));

Expand Down
Loading