改: NVENC 默认 preset p6 -> p7（业主决定）

GPU ASIC 有余量，同一 cq 下每升一档体积更小；x265 保持 medium（三个 worker 并行时 CPU 是瓶颈）。两个 preset 都可由控制面用 --x265-preset / --nvenc-preset 覆盖，常量只是手跑时的回落值。
2026-10-12 23:32:00 +08:00
parent 767fa3ac08
commit 5e27edef16
1 changed files with 5 additions and 2 deletions
@@ -111,8 +111,11 @@ DECODE_CHECK = True
 CQ_NVENC = 31            # measured: min SSIM 0.989-0.994 at 43-74% of the source video bitrate
 CRF_X265 = 26            # measured: min SSIM 0.988-0.993 at 34-67% -- 10-22% smaller than NVENC
                         # at matched SSIM. crf24 = the conservative option (min 0.990-0.994, 43-84%)
-NVENC_PRESET = "p6"
-X265_PRESET = "medium"
+NVENC_PRESET = "p7"        # owner default (2026-10-12): the GPU ASIC has spare time, and each step
+# up this ladder buys size at the same CQ. Overridable per run with --nvenc-preset; the control
+# plane passes its own setting, so this constant is only the fallback for a hand-run engine.
+X265_PRESET = "medium"     # ... and the CPU is the contended resource here (three workers run side
+# by side), so the x265 default stays `medium`; --x265-preset / the dashboard can move it.
 X265_POOLS = 10          # E-cores only (affinity 0x3FF0000)
 E_CORE_MASK = 0x3FF0000
 SSIM_TARGET = 0.985      # per-frame floor vs the source window (480x270 comparison)