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avcodec/nvenc: Multi NVENC Split Frame Encoding in HEVC and AV1 

When Split frame encoding is enabled, each input frame is partitioned into
horizontal strips which are encoded independently and simultaneously by
separate NVENCs, usually resulting in increased encoding speed compared to
single NVENC encoding.

Signed-off-by: Diego Felix de Souza <ddesouza@nvidia.com>
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
This commit is contained in:
Diego Felix de Souza 2024-04-12 20:08:12 +00:00 committed by Timo Rothenpieler
parent 1c45104f74
commit 1f265aa91d
5 changed files with 28 additions and 1 deletions
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9
libavcodec/nvenc.c
View File

@ -1696,6 +1696,15 @@ FF_ENABLE_DEPRECATION_WARNINGS
if (ctx->weighted_pred == 1)
ctx->init_encode_params.enableWeightedPrediction = 1;
#ifdef NVENC_HAVE_SPLIT_FRAME_ENCODING
ctx->init_encode_params.splitEncodeMode = ctx->split_encode_mode;
if (ctx->split_encode_mode != NV_ENC_SPLIT_DISABLE_MODE) {
if (avctx->codec->id == AV_CODEC_ID_HEVC && ctx->weighted_pred == 1)
av_log(avctx, AV_LOG_WARNING, "Split encoding not supported with weighted prediction enabled.\n");
}
#endif
if (ctx->bluray_compat) {
ctx->aud = 1;
ctx->dpb_size = FFMIN(FFMAX(avctx->refs, 0), 6);

2
libavcodec/nvenc.h
View File

@ -81,6 +81,7 @@ typedef void ID3D11Device;
// SDK 12.1 compile time feature checks
#if NVENCAPI_CHECK_VERSION(12, 1)
#define NVENC_NO_DEPRECATED_RC
#define NVENC_HAVE_SPLIT_FRAME_ENCODING
#endif
// SDK 12.2 compile time feature checks
@ -280,6 +281,7 @@ typedef struct NvencContext
int tf_level;
int lookahead_level;
int unidir_b;
int split_encode_mode;
} NvencContext;
int ff_nvenc_encode_init(AVCodecContext *avctx);

8
libavcodec/nvenc_av1.c
View File

@ -157,6 +157,14 @@ static const AVOption options[] = {
{ "1", "", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_LOOKAHEAD_LEVEL_1 }, 0, 0, VE, .unit = "lookahead_level" },
{ "2", "", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_LOOKAHEAD_LEVEL_2 }, 0, 0, VE, .unit = "lookahead_level" },
{ "3", "", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_LOOKAHEAD_LEVEL_3 }, 0, 0, VE, .unit = "lookahead_level" },
#endif
#ifdef NVENC_HAVE_SPLIT_FRAME_ENCODING
{ "split_encode_mode", "Specifies the split encoding mode", OFFSET(split_encode_mode), AV_OPT_TYPE_INT, { .i64 = NV_ENC_SPLIT_AUTO_MODE }, 0, NV_ENC_SPLIT_DISABLE_MODE, VE, .unit = "split_encode_mode" },
{ "disabled", "Disabled for all configurations", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_DISABLE_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "auto", "Enabled or disabled depending on the preset and tuning info", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_AUTO_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "forced", "Enabled with number of horizontal strips selected by the driver", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_AUTO_FORCED_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "2", "Enabled with number of horizontal strips forced to 2 when number of NVENCs > 1", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_TWO_FORCED_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "3", "Enabled with number of horizontal strips forced to 3 when number of NVENCs > 2", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_THREE_FORCED_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
#endif
{ NULL }
};

8
libavcodec/nvenc_hevc.c
View File

@ -216,6 +216,14 @@ static const AVOption options[] = {
#endif
#ifdef NVENC_HAVE_UNIDIR_B
{ "unidir_b", "Enable use of unidirectional B-Frames.", OFFSET(unidir_b), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
#endif
#ifdef NVENC_HAVE_SPLIT_FRAME_ENCODING
{ "split_encode_mode", "Specifies the split encoding mode", OFFSET(split_encode_mode), AV_OPT_TYPE_INT, { .i64 = NV_ENC_SPLIT_AUTO_MODE }, 0, NV_ENC_SPLIT_DISABLE_MODE, VE, .unit = "split_encode_mode" },
{ "disabled", "Disabled for all configurations", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_DISABLE_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "auto", "Enabled or disabled depending on the preset and tuning info", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_AUTO_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "forced", "Enabled with number of horizontal strips selected by the driver", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_AUTO_FORCED_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "2", "Enabled with number of horizontal strips forced to 2 when number of NVENCs > 1", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_TWO_FORCED_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
{ "3", "Enabled with number of horizontal strips forced to 3 when number of NVENCs > 2", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_SPLIT_THREE_FORCED_MODE }, 0, 0, VE, .unit = "split_encode_mode" },
#endif
{ NULL }
};

2
libavcodec/version.h
View File

@ -30,7 +30,7 @@
#include "version_major.h"
#define LIBAVCODEC_VERSION_MINOR 5
#define LIBAVCODEC_VERSION_MICRO 102
#define LIBAVCODEC_VERSION_MICRO 103
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \