[FFmpeg-cvslog] webm: Additional options/presets for VP8 encodes under FFmpeg
James Zern
git at videolan.org
Thu May 26 22:01:45 CEST 2011
ffmpeg | branch: master | James Zern <jzern at google.com> | Thu May 26 20:20:36 2011 +0200| [a138121bf1f952073914d493c099ebfea22ac5f7] | committer: Michael Niedermayer
webm: Additional options/presets for VP8 encodes under FFmpeg
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a138121bf1f952073914d493c099ebfea22ac5f7
---
libavcodec/libvpxenc.c | 53 ++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 49 insertions(+), 4 deletions(-)
diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index ef85b30..b55e755 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -30,6 +30,7 @@
#include "avcodec.h"
#include "libavutil/base64.h"
+#include "libavutil/opt.h"
/**
* Portion of struct vpx_codec_cx_pkt from vpx_encoder.h.
@@ -50,10 +51,45 @@ typedef struct VP8EncoderContext {
struct vpx_codec_ctx encoder;
struct vpx_image rawimg;
struct vpx_fixed_buf twopass_stats;
- unsigned long deadline; //i.e., RT/GOOD/BEST
+ int deadline; //i.e., RT/GOOD/BEST
struct FrameListData *coded_frame_list;
+
+ int cpuused;
+
+ /**
+ * VP8 specific flags, see VP8F_* below.
+ */
+ int flags;
+#define VP8F_ERROR_RESILIENT 0x00000001 ///< Enable measures appropriate for streaming over lossy links
+#define VP8F_AUTO_ALT_REF 0x00000002 ///< Enable automatic alternate reference frame generation
+
+ int arnr_max_frames;
+ int arnr_strength;
+ int arnr_type;
} VP8Context;
+#define V AV_OPT_FLAG_VIDEO_PARAM
+#define E AV_OPT_FLAG_ENCODING_PARAM
+
+static const AVOption options[]={
+{"speed", "", offsetof(VP8Context, cpuused), FF_OPT_TYPE_INT, 3, -16, 16, V|E},
+{"quality", "", offsetof(VP8Context, deadline), FF_OPT_TYPE_INT, VPX_DL_GOOD_QUALITY, INT_MIN, INT_MAX, V|E, "quality"},
+{"best", NULL, 0, FF_OPT_TYPE_CONST, VPX_DL_BEST_QUALITY, INT_MIN, INT_MAX, V|E, "quality"},
+{"good", NULL, 0, FF_OPT_TYPE_CONST, VPX_DL_GOOD_QUALITY, INT_MIN, INT_MAX, V|E, "quality"},
+{"realtime", NULL, 0, FF_OPT_TYPE_CONST, VPX_DL_REALTIME, INT_MIN, INT_MAX, V|E, "quality"},
+{"vp8flags", "", offsetof(VP8Context, flags), FF_OPT_TYPE_FLAGS, 0, 0, UINT_MAX, V|E, "flags"},
+{"error_resilient", "enable error resilience", 0, FF_OPT_TYPE_CONST, VP8F_ERROR_RESILIENT, INT_MIN, INT_MAX, V|E, "flags"},
+{"altref", "enable use of alternate reference frames (VP8/2-pass only)", 0, FF_OPT_TYPE_CONST, VP8F_AUTO_ALT_REF, INT_MIN, INT_MAX, V|E, "flags"},
+{"arnr_max_frames", "altref noise reduction max frame count", offsetof(VP8Context, arnr_max_frames), FF_OPT_TYPE_INT, 0, 0, 15, V|E},
+{"arnr_strength", "altref noise reduction filter strength", offsetof(VP8Context, arnr_strength), FF_OPT_TYPE_INT, 3, 0, 6, V|E},
+{"arnr_type", "altref noise reduction filter type", offsetof(VP8Context, arnr_type), FF_OPT_TYPE_INT, 3, 1, 3, V|E},
+{NULL}
+};
+static const AVClass class = { "libvpx", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
+
+#undef V
+#undef E
+
/** String mappings for enum vp8e_enc_control_id */
static const char *ctlidstr[] = {
[VP8E_UPD_ENTROPY] = "VP8E_UPD_ENTROPY",
@@ -205,7 +241,6 @@ static av_cold int vp8_init(AVCodecContext *avctx)
{
VP8Context *ctx = avctx->priv_data;
const struct vpx_codec_iface *iface = &vpx_codec_vp8_cx_algo;
- int cpuused = 3;
struct vpx_codec_enc_cfg enccfg;
int res;
@@ -224,6 +259,7 @@ static av_cold int vp8_init(AVCodecContext *avctx)
enccfg.g_timebase.num = avctx->time_base.num;
enccfg.g_timebase.den = avctx->time_base.den;
enccfg.g_threads = avctx->thread_count;
+ enccfg.g_lag_in_frames= FFMIN(avctx->rc_lookahead, 25); //0-25, avoids init failure
if (avctx->flags & CODEC_FLAG_PASS1)
enccfg.g_pass = VPX_RC_FIRST_PASS;
@@ -259,6 +295,7 @@ static av_cold int vp8_init(AVCodecContext *avctx)
enccfg.rc_buf_initial_sz =
avctx->rc_initial_buffer_occupancy * 1000LL / avctx->bit_rate;
enccfg.rc_buf_optimal_sz = enccfg.rc_buf_sz * 5 / 6;
+ enccfg.rc_undershoot_pct = round(avctx->rc_buffer_aggressivity * 100);
//_enc_init() will balk if kf_min_dist differs from max w/VPX_KF_AUTO
if (avctx->keyint_min == avctx->gop_size)
@@ -294,13 +331,14 @@ static av_cold int vp8_init(AVCodecContext *avctx)
enccfg.rc_twopass_stats_in = ctx->twopass_stats;
}
- ctx->deadline = VPX_DL_GOOD_QUALITY;
/* 0-3: For non-zero values the encoder increasingly optimizes for reduced
complexity playback on low powered devices at the expense of encode
quality. */
if (avctx->profile != FF_PROFILE_UNKNOWN)
enccfg.g_profile = avctx->profile;
+ enccfg.g_error_resilient = ctx->flags & VP8F_ERROR_RESILIENT;
+
dump_enc_cfg(avctx, &enccfg);
/* Construct Encoder Context */
res = vpx_codec_enc_init(&ctx->encoder, iface, &enccfg, 0);
@@ -311,11 +349,17 @@ static av_cold int vp8_init(AVCodecContext *avctx)
//codec control failures are currently treated only as warnings
av_log(avctx, AV_LOG_DEBUG, "vpx_codec_control\n");
- codecctl_int(avctx, VP8E_SET_CPUUSED, cpuused);
+ codecctl_int(avctx, VP8E_SET_CPUUSED, ctx->cpuused);
codecctl_int(avctx, VP8E_SET_NOISE_SENSITIVITY, avctx->noise_reduction);
codecctl_int(avctx, VP8E_SET_TOKEN_PARTITIONS, av_log2(avctx->slices));
codecctl_int(avctx, VP8E_SET_STATIC_THRESHOLD, avctx->mb_threshold);
codecctl_int(avctx, VP8E_SET_CQ_LEVEL, (int)avctx->crf);
+ codecctl_int(avctx, VP8E_SET_ENABLEAUTOALTREF, !!(ctx->flags & VP8F_AUTO_ALT_REF));
+ codecctl_int(avctx, VP8E_SET_ARNR_MAXFRAMES, ctx->arnr_max_frames);
+ codecctl_int(avctx, VP8E_SET_ARNR_STRENGTH, ctx->arnr_strength);
+ codecctl_int(avctx, VP8E_SET_ARNR_TYPE, ctx->arnr_type);
+
+ av_log(avctx, AV_LOG_DEBUG, "Using deadline: %d\n", ctx->deadline);
//provide dummy value to initialize wrapper, values will be updated each _encode()
vpx_img_wrap(&ctx->rawimg, VPX_IMG_FMT_I420, avctx->width, avctx->height, 1,
@@ -511,4 +555,5 @@ AVCodec ff_libvpx_encoder = {
CODEC_CAP_DELAY,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
+ .priv_class= &class,
};
More information about the ffmpeg-cvslog
mailing list