[FFmpeg-devel] [PATCH 2/3] Optimize nvenc parameters, add 3 more presets: fast, medium, slow
Philip Langdale
philipl at overt.org
Sat Sep 12 05:18:28 CEST 2015
On Fri, 11 Sep 2015 17:32:06 +0800
Agatha Hu <ahu at nvidia.com> wrote:
> From: ahu <ahu at ubuntu.(none)>
>
> ---
> libavcodec/nvenc.c | 59
> +++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed,
> 54 insertions(+), 5 deletions(-)
>
> diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
> index 3174b01..fd90f7b 100644
> --- a/libavcodec/nvenc.c
> +++ b/libavcodec/nvenc.c
> @@ -610,8 +610,17 @@ static av_cold int
> nvenc_encode_init(AVCodecContext *avctx) if (ctx->preset) {
> if (!strcmp(ctx->preset, "hp")) {
> encoder_preset = NV_ENC_PRESET_HP_GUID;
> + } else if (!strcmp(ctx->preset, "fast")) {
> + ctx->twopass = 0;
> + encoder_preset = NV_ENC_PRESET_HQ_GUID;
Should this be HP_GUID?
Your updated help text below says fast == hp.
> } else if (!strcmp(ctx->preset, "hq")) {
> encoder_preset = NV_ENC_PRESET_HQ_GUID;
> + } else if (!strcmp(ctx->preset, "medium")) {
> + ctx->twopass = 0;
> + encoder_preset = NV_ENC_PRESET_HQ_GUID;
> + } else if (!strcmp(ctx->preset, "slow")) {
> + ctx->twopass = 1;
> + encoder_preset = NV_ENC_PRESET_HQ_GUID;
> } else if (!strcmp(ctx->preset, "bd")) {
> encoder_preset = NV_ENC_PRESET_BD_GUID;
> } else if (!strcmp(ctx->preset, "ll")) {
> @@ -632,7 +641,7 @@ 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, fast, hp, hq, bd, ll, llhp, llhq,
> lossless, losslesshp, default\n", ctx->preset); res =
> AVERROR(EINVAL); goto error; }
> @@ -710,6 +719,7 @@ static av_cold int
> nvenc_encode_init(AVCodecContext *avctx) switch (avctx->codec->id) {
> case AV_CODEC_ID_H264:
> ctx->encode_config.encodeCodecConfig.h264Config.maxNumRefFrames
> = avctx->refs;
> +
> ctx->encode_config.encodeCodecConfig.h264Config.hierarchicalPFrames =
> 1; break; case AV_CODEC_ID_H265:
> ctx->encode_config.encodeCodecConfig.hevcConfig.maxNumRefFramesInDPB
> = avctx->refs; @@ -770,7 +780,7 @@ static av_cold int
> nvenc_encode_init(AVCodecContext *avctx) avctx->qmin = -1;
> avctx->qmax = -1;
> } else if (ctx->cbr) {
> - if (!ctx->twopass) {
> + if (ctx->twopass < 1) {
> ctx->encode_config.rcParams.rateControlMode =
> NV_ENC_PARAMS_RC_CBR; } else if (ctx->twopass == 1 || isLL) {
> ctx->encode_config.rcParams.rateControlMode =
> NV_ENC_PARAMS_RC_2_PASS_QUALITY; @@ -799,7 +809,7 @@ 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;
> @@ -812,6 +822,45 @@ static av_cold int
> nvenc_encode_init(AVCodecContext *avctx)
> ctx->encode_config.rcParams.maxQP.qpInterB = avctx->qmax;
> ctx->encode_config.rcParams.maxQP.qpInterP = avctx->qmax;
> ctx->encode_config.rcParams.maxQP.qpIntra = avctx->qmax;
> +
> + {
> + uint32_t qpInterP = (avctx->qmax + 3*avctx->qmin)/4; //
> biased towards Qmin
> + ctx->encode_config.rcParams.initialRCQP.qpInterP =
> qpInterP;
> + if(avctx->i_quant_factor != 0.0 &&
> avctx->b_quant_factor != 0.0) {
> + ctx->encode_config.rcParams.initialRCQP.qpIntra =
> qpInterP * fabs(avctx->i_quant_factor);
> + ctx->encode_config.rcParams.initialRCQP.qpIntra +=
> qpInterP * (avctx->i_quant_offset);
> + ctx->encode_config.rcParams.initialRCQP.qpInterB =
> qpInterP * fabs(avctx->b_quant_factor);
> + ctx->encode_config.rcParams.initialRCQP.qpInterB +=
> qpInterP * (avctx->b_quant_offset);
> + } else {
> + ctx->encode_config.rcParams.initialRCQP.qpIntra =
> qpInterP;
> + ctx->encode_config.rcParams.initialRCQP.qpInterB =
> qpInterP;
> + }
> + }
> + ctx->encode_config.rcParams.enableInitialRCQP = 1;
> + } else {
> + if (ctx->twopass < 1) {
> + ctx->encode_config.rcParams.rateControlMode =
> NV_ENC_PARAMS_RC_VBR;
> + } else {
> + ctx->encode_config.rcParams.rateControlMode =
> NV_ENC_PARAMS_RC_2_PASS_VBR;
> + }
> +
> + {
> + uint32_t qpInterP = 26; // default to 26
> + ctx->encode_config.rcParams.initialRCQP.qpInterP =
> qpInterP; +
> + if(avctx->i_quant_factor != 0.0 &&
> avctx->b_quant_factor != 0.0) { +
> + ctx->encode_config.rcParams.initialRCQP.qpIntra =
> qpInterP * fabs(avctx->i_quant_factor);
> + ctx->encode_config.rcParams.initialRCQP.qpIntra +=
> qpInterP * (avctx->i_quant_offset); +
> + ctx->encode_config.rcParams.initialRCQP.qpInterB =
> qpInterP * fabs(avctx->b_quant_factor);
> + ctx->encode_config.rcParams.initialRCQP.qpInterB +=
> qpInterP * (avctx->b_quant_offset);
> + } else {
> + ctx->encode_config.rcParams.initialRCQP.qpIntra =
> qpInterP;
> + ctx->encode_config.rcParams.initialRCQP.qpInterB =
> qpInterP;
> + }
> + }
> + ctx->encode_config.rcParams.enableInitialRCQP = 1;
> }
>
> if (avctx->rc_buffer_size > 0)
> @@ -1415,12 +1464,12 @@ 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 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 },
> + { "2pass", "Use 2pass encoding mode", OFFSET(twopass),
> AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 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 }
Rest is fine.
--phil
More information about the ffmpeg-devel
mailing list