[FFmpeg-cvslog] avcodec/nvenc: Optimize nvenc parameters
Agatha Hu
git at videolan.org
Mon Sep 14 14:38:50 CEST 2015
ffmpeg | branch: master | Agatha Hu <ahu at nvidia.com> | Fri Sep 11 11:07:10 2015 +0200| [49046580ce62956c4639d348cef6e37ef4c77a61] | committer: Timo Rothenpieler
avcodec/nvenc: Optimize nvenc parameters
Add 3 more presets: fast, medium, slow.
Improve min/max QP calculation.
Signed-off-by: Timo Rothenpieler <timo at rothenpieler.org>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=49046580ce62956c4639d348cef6e37ef4c77a61
---
libavcodec/nvenc.c | 96 +++++++++++++++++++++++++++++++++++++++-------------
1 file changed, 73 insertions(+), 23 deletions(-)
diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index 3174b01..15cf793 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -408,7 +408,7 @@ static av_cold int nvenc_check_cuda(AVCodecContext *avctx)
target_smver = 0x52;
break;
default:
- av_log(avctx, AV_LOG_FATAL, "nvenc: Unknown codec name\n");
+ av_log(avctx, AV_LOG_FATAL, "Unknown codec name\n");
goto error;
}
@@ -556,6 +556,7 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
int lossless = 0;
int res = 0;
int dw, dh;
+ int qp_inter_p;
NvencContext *ctx = avctx->priv_data;
NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
@@ -602,16 +603,25 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
nv_status = p_nvenc->nvEncOpenEncodeSessionEx(&encode_session_params, &ctx->nvencoder);
if (nv_status != NV_ENC_SUCCESS) {
ctx->nvencoder = NULL;
- av_log(avctx, AV_LOG_FATAL, "OpenEncodeSessionEx failed: 0x%x - invalid license key?\n", (int)nv_status);
+ av_log(avctx, AV_LOG_FATAL, "OpenEncodeSessionEx failed: 0x%x\n", (int)nv_status);
res = AVERROR_EXTERNAL;
goto error;
}
if (ctx->preset) {
- if (!strcmp(ctx->preset, "hp")) {
+ if (!strcmp(ctx->preset, "slow")) {
+ encoder_preset = NV_ENC_PRESET_HQ_GUID;
+ ctx->twopass = 1;
+ } else if (!strcmp(ctx->preset, "medium")) {
+ encoder_preset = NV_ENC_PRESET_HQ_GUID;
+ ctx->twopass = 0;
+ } else if (!strcmp(ctx->preset, "fast")) {
encoder_preset = NV_ENC_PRESET_HP_GUID;
+ ctx->twopass = 0;
} else if (!strcmp(ctx->preset, "hq")) {
encoder_preset = NV_ENC_PRESET_HQ_GUID;
+ } else if (!strcmp(ctx->preset, "hp")) {
+ encoder_preset = NV_ENC_PRESET_HP_GUID;
} else if (!strcmp(ctx->preset, "bd")) {
encoder_preset = NV_ENC_PRESET_BD_GUID;
} else if (!strcmp(ctx->preset, "ll")) {
@@ -632,12 +642,16 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
} else if (!strcmp(ctx->preset, "default")) {
encoder_preset = NV_ENC_PRESET_DEFAULT_GUID;
} else {
- av_log(avctx, AV_LOG_FATAL, "Preset \"%s\" is unknown! Supported presets: hp, hq, bd, ll, llhp, llhq, lossless, losslesshp, default\n", ctx->preset);
+ av_log(avctx, AV_LOG_FATAL, "Preset \"%s\" is unknown! Supported presets: slow, medium, high, hp, hq, bd, ll, llhp, llhq, lossless, losslesshp, default\n", ctx->preset);
res = AVERROR(EINVAL);
goto error;
}
}
+ if (ctx->twopass < 0) {
+ ctx->twopass = isLL;
+ }
+
switch (avctx->codec->id) {
case AV_CODEC_ID_H264:
codec = NV_ENC_CODEC_H264_GUID;
@@ -646,7 +660,7 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
codec = NV_ENC_CODEC_HEVC_GUID;
break;
default:
- av_log(avctx, AV_LOG_ERROR, "nvenc: Unknown codec name\n");
+ av_log(avctx, AV_LOG_ERROR, "Unknown codec name\n");
res = AVERROR(EINVAL);
goto error;
}
@@ -728,6 +742,8 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
switch (avctx->codec->id) {
case AV_CODEC_ID_H264:
ctx->encode_config.encodeCodecConfig.h264Config.idrPeriod = avctx->gop_size;
+ ctx->encode_config.encodeCodecConfig.h264Config.hierarchicalPFrames = 1;
+ ctx->encode_config.encodeCodecConfig.h264Config.hierarchicalBFrames = 1;
break;
case AV_CODEC_ID_H265:
ctx->encode_config.encodeCodecConfig.hevcConfig.idrPeriod = avctx->gop_size;
@@ -772,15 +788,13 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
} else if (ctx->cbr) {
if (!ctx->twopass) {
ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CBR;
- } else if (ctx->twopass == 1 || isLL) {
+ } else {
ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_2_PASS_QUALITY;
if (avctx->codec->id == AV_CODEC_ID_H264) {
ctx->encode_config.encodeCodecConfig.h264Config.adaptiveTransformMode = NV_ENC_H264_ADAPTIVE_TRANSFORM_ENABLE;
ctx->encode_config.encodeCodecConfig.h264Config.fmoMode = NV_ENC_H264_FMO_DISABLE;
}
- } else {
- ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CBR;
}
} else if (avctx->global_quality > 0) {
ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CONSTQP;
@@ -791,7 +805,7 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
avctx->qmin = -1;
avctx->qmax = -1;
} else if (avctx->qmin >= 0 && avctx->qmax >= 0) {
- if (ctx->twopass == 1) {
+ if (ctx->twopass) {
ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_2_PASS_VBR;
if (avctx->codec->id == AV_CODEC_ID_H264) {
@@ -799,19 +813,55 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
ctx->encode_config.encodeCodecConfig.h264Config.fmoMode = NV_ENC_H264_FMO_DISABLE;
}
} else {
- ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_VBR;
+ ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_VBR_MINQP;
}
ctx->encode_config.rcParams.enableMinQP = 1;
ctx->encode_config.rcParams.enableMaxQP = 1;
- ctx->encode_config.rcParams.minQP.qpInterB = avctx->qmin;
- ctx->encode_config.rcParams.minQP.qpInterP = avctx->qmin;
+ ctx->encode_config.rcParams.minQP.qpInterB = avctx->qmin; // * fabs(avctx->b_quant_factor);
+ ctx->encode_config.rcParams.minQP.qpInterP = avctx->qmin; // * fabs(avctx->i_quant_factor);
ctx->encode_config.rcParams.minQP.qpIntra = avctx->qmin;
- ctx->encode_config.rcParams.maxQP.qpInterB = avctx->qmax;
- ctx->encode_config.rcParams.maxQP.qpInterP = avctx->qmax;
+ ctx->encode_config.rcParams.maxQP.qpInterB = avctx->qmax; // / fabs(avctx->b_quant_factor);
+ ctx->encode_config.rcParams.maxQP.qpInterP = avctx->qmax; // / fabs(avctx->i_quant_factor);
ctx->encode_config.rcParams.maxQP.qpIntra = avctx->qmax;
+
+ qp_inter_p = (avctx->qmax + 3 * avctx->qmin) / 4; // biased towards Qmin
+ ctx->encode_config.rcParams.initialRCQP.qpInterP = qp_inter_p;
+
+ if (avctx->i_quant_factor != 0.0 && avctx->b_quant_factor != 0.0) {
+ ctx->encode_config.rcParams.initialRCQP.qpIntra = qp_inter_p * fabs(avctx->i_quant_factor);
+ ctx->encode_config.rcParams.initialRCQP.qpIntra += qp_inter_p * avctx->i_quant_offset;
+ ctx->encode_config.rcParams.initialRCQP.qpInterB = qp_inter_p * fabs(avctx->b_quant_factor);
+ ctx->encode_config.rcParams.initialRCQP.qpInterB += qp_inter_p * avctx->b_quant_offset;
+ } else {
+ ctx->encode_config.rcParams.initialRCQP.qpIntra = qp_inter_p;
+ ctx->encode_config.rcParams.initialRCQP.qpInterB = qp_inter_p;
+ }
+
+ ctx->encode_config.rcParams.enableInitialRCQP = 1;
+ } else {
+ if (!ctx->twopass) {
+ ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_VBR;
+ } else {
+ ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_2_PASS_VBR;
+ }
+
+ qp_inter_p = 26; // default to 26
+ ctx->encode_config.rcParams.initialRCQP.qpInterP = qp_inter_p;
+
+ if(avctx->i_quant_factor != 0.0 && avctx->b_quant_factor != 0.0) {
+ ctx->encode_config.rcParams.initialRCQP.qpIntra = qp_inter_p * fabs(avctx->i_quant_factor);
+ ctx->encode_config.rcParams.initialRCQP.qpIntra += qp_inter_p * avctx->i_quant_offset;
+ ctx->encode_config.rcParams.initialRCQP.qpInterB = qp_inter_p * fabs(avctx->b_quant_factor);
+ ctx->encode_config.rcParams.initialRCQP.qpInterB += qp_inter_p * avctx->b_quant_offset;
+ } else {
+ ctx->encode_config.rcParams.initialRCQP.qpIntra = qp_inter_p;
+ ctx->encode_config.rcParams.initialRCQP.qpInterB = qp_inter_p;
+ }
+
+ ctx->encode_config.rcParams.enableInitialRCQP = 1;
}
if (avctx->rc_buffer_size > 0)
@@ -1113,7 +1163,7 @@ static int process_output_surface(AVCodecContext *avctx, AVPacket *pkt, NvencOut
slice_mode_data = ctx->encode_config.encodeCodecConfig.hevcConfig.sliceModeData;
break;
default:
- av_log(avctx, AV_LOG_ERROR, "nvenc: Unknown codec name\n");
+ av_log(avctx, AV_LOG_ERROR, "Unknown codec name\n");
res = AVERROR(EINVAL);
goto error;
}
@@ -1135,7 +1185,7 @@ static int process_output_surface(AVCodecContext *avctx, AVPacket *pkt, NvencOut
goto error;
}
- if (res = ff_alloc_packet2(avctx, pkt, lock_params.bitstreamSizeInBytes, 0)) {
+ if (res = ff_alloc_packet2(avctx, pkt, lock_params.bitstreamSizeInBytes,0)) {
p_nvenc->nvEncUnlockBitstream(ctx->nvencoder, tmpoutsurf->output_surface);
goto error;
}
@@ -1338,7 +1388,7 @@ static int nvenc_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
pic_params.codecPicParams.hevcPicParams.sliceModeData = ctx->encode_config.encodeCodecConfig.hevcConfig.sliceModeData;
break;
default:
- av_log(avctx, AV_LOG_ERROR, "nvenc: Unknown codec name\n");
+ av_log(avctx, AV_LOG_ERROR, "Unknown codec name\n");
return AVERROR(EINVAL);
}
@@ -1415,12 +1465,12 @@ static const enum AVPixelFormat pix_fmts_nvenc[] = {
#define OFFSET(x) offsetof(NvencContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
- { "preset", "Set the encoding preset (one of hq, hp, bd, ll, llhq, llhp, default)", OFFSET(preset), AV_OPT_TYPE_STRING, { .str = "hq" }, 0, 0, VE },
+ { "preset", "Set the encoding preset (one of slow = hq 2pass, medium = hq, fast = hp, hq, hp, bd, ll, llhq, llhp, default)", OFFSET(preset), AV_OPT_TYPE_STRING, { .str = "hq" }, 0, 0, VE },
{ "profile", "Set the encoding profile (high, main or baseline)", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
{ "level", "Set the encoding level restriction (auto, 1.0, 1.0b, 1.1, 1.2, ..., 4.2, 5.0, 5.1)", OFFSET(level), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
{ "tier", "Set the encoding tier (main or high)", OFFSET(tier), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
- { "cbr", "Use cbr encoding mode", OFFSET(cbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
- { "2pass", "Use 2pass cbr encoding mode", OFFSET(twopass), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },
+ { "cbr", "Use cbr encoding mode", OFFSET(cbr), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
+ { "2pass", "Use 2pass encoding mode", OFFSET(twopass), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VE },
{ "gpu", "Selects which NVENC capable GPU to use. First GPU is 0, second is 1, and so on.", OFFSET(gpu), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "delay", "Delays frame output by the given amount of frames.", OFFSET(buffer_delay), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 0, INT_MAX, VE },
{ NULL }
@@ -1446,7 +1496,7 @@ static const AVClass nvenc_class = {
AVCodec ff_nvenc_encoder = {
.name = "nvenc",
- .long_name = NULL_IF_CONFIG_SMALL("Nvidia NVENC h264 encoder"),
+ .long_name = NULL_IF_CONFIG_SMALL("NVIDIA NVENC h264 encoder"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.priv_data_size = sizeof(NvencContext),
@@ -1471,7 +1521,7 @@ static const AVClass nvenc_h264_class = {
AVCodec ff_nvenc_h264_encoder = {
.name = "nvenc_h264",
- .long_name = NULL_IF_CONFIG_SMALL("Nvidia NVENC h264 encoder"),
+ .long_name = NULL_IF_CONFIG_SMALL("NVIDIA NVENC h264 encoder"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.priv_data_size = sizeof(NvencContext),
@@ -1495,7 +1545,7 @@ static const AVClass nvenc_hevc_class = {
AVCodec ff_nvenc_hevc_encoder = {
.name = "nvenc_hevc",
- .long_name = NULL_IF_CONFIG_SMALL("Nvidia NVENC hevc encoder"),
+ .long_name = NULL_IF_CONFIG_SMALL("NVIDIA NVENC hevc encoder"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H265,
.priv_data_size = sizeof(NvencContext),
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