avcodec/nvenc: add initial QP value options

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

5 files changed, 35 insertions, 9 deletions

diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index fbd42f4138..d9fef525dd 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -547,16 +547,33 @@ static av_cold void set_vbr(AVCodecContext *avctx)
     }
 
     rc->enableInitialRCQP = 1;
-    rc->initialRCQP.qpInterP  = qp_inter_p;
 
-    if (avctx->i_quant_factor != 0.0 && avctx->b_quant_factor != 0.0) {
-        rc->initialRCQP.qpIntra = av_clip(
-            qp_inter_p * fabs(avctx->i_quant_factor) + avctx->i_quant_offset + 0.5, 0, 51);
-        rc->initialRCQP.qpInterB = av_clip(
-            qp_inter_p * fabs(avctx->b_quant_factor) + avctx->b_quant_offset + 0.5, 0, 51);
+    if (ctx->init_qp_p < 0) {
+        rc->initialRCQP.qpInterP  = qp_inter_p;
     } else {
-        rc->initialRCQP.qpIntra = qp_inter_p;
-        rc->initialRCQP.qpInterB = qp_inter_p;
+        rc->initialRCQP.qpInterP = ctx->init_qp_p;
+    }
+
+    if (ctx->init_qp_i < 0) {
+        if (avctx->i_quant_factor != 0.0 && avctx->b_quant_factor != 0.0) {
+            rc->initialRCQP.qpIntra = av_clip(
+                rc->initialRCQP.qpInterP * fabs(avctx->i_quant_factor) + avctx->i_quant_offset + 0.5, 0, 51);
+        } else {
+            rc->initialRCQP.qpIntra = rc->initialRCQP.qpInterP;
+        }
+    } else {
+        rc->initialRCQP.qpIntra = ctx->init_qp_i;
+    }
+
+    if (ctx->init_qp_b < 0) {
+        if (avctx->i_quant_factor != 0.0 && avctx->b_quant_factor != 0.0) {
+            rc->initialRCQP.qpInterB = av_clip(
+                rc->initialRCQP.qpInterP * fabs(avctx->b_quant_factor) + avctx->b_quant_offset + 0.5, 0, 51);
+        } else {
+            rc->initialRCQP.qpInterB = rc->initialRCQP.qpInterP;
+        }
+    } else {
+        rc->initialRCQP.qpInterB = ctx->init_qp_b;
     }
 }
 
diff --git a/libavcodec/nvenc.h b/libavcodec/nvenc.h
index ab48cf759a..cfca2efcc5 100644
--- a/libavcodec/nvenc.h
+++ b/libavcodec/nvenc.h
@@ -155,6 +155,9 @@ typedef struct NvencContext
     int quality;
     int aud;
     int bluray_compat;
+    int init_qp_p;
+    int init_qp_b;
+    int init_qp_i;
 } NvencContext;
 
 int ff_nvenc_encode_init(AVCodecContext *avctx);
diff --git a/libavcodec/nvenc_h264.c b/libavcodec/nvenc_h264.c
index 3f71204afb..b7d4004fd3 100644
--- a/libavcodec/nvenc_h264.c
+++ b/libavcodec/nvenc_h264.c
@@ -109,6 +109,9 @@ static const AVOption options[] = {
                                                             OFFSET(quality),      AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, 51, VE },
     { "aud",          "Use access unit delimiters",         OFFSET(aud),          AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
     { "bluray-compat", "Bluray compatibility workarounds",  OFFSET(bluray_compat),AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
+    { "init_qpP",     "Initial QP value for P frame",       OFFSET(init_qp_p),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
+    { "init_qpB",     "Initial QP value for B frame",       OFFSET(init_qp_b),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
+    { "init_qpI",     "Initial QP value for I frame",       OFFSET(init_qp_i),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
     { NULL }
 };
 
diff --git a/libavcodec/nvenc_hevc.c b/libavcodec/nvenc_hevc.c
index 1c97fb0e45..2804d7df5a 100644
--- a/libavcodec/nvenc_hevc.c
+++ b/libavcodec/nvenc_hevc.c
@@ -106,6 +106,9 @@ static const AVOption options[] = {
                                                             OFFSET(quality),      AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, 51, VE },
     { "aud",          "Use access unit delimiters",         OFFSET(aud),          AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
     { "bluray-compat", "Bluray compatibility workarounds",  OFFSET(bluray_compat),AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
+    { "init_qpP",     "Initial QP value for P frame",       OFFSET(init_qp_p),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
+    { "init_qpB",     "Initial QP value for B frame",       OFFSET(init_qp_b),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
+    { "init_qpI",     "Initial QP value for I frame",       OFFSET(init_qp_i),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
     { NULL }
 };
 
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 6fdc7764af..c027e6c3cb 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  57
 #define LIBAVCODEC_VERSION_MINOR  81
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \