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-rw-r--r--DOCS/man/en/mplayer.125
-rw-r--r--libmpcodecs/ve_x264.c24
2 files changed, 34 insertions, 15 deletions
diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1
index 7eeb6b656a..7336162d19 100644
--- a/DOCS/man/en/mplayer.1
+++ b/DOCS/man/en/mplayer.1
@@ -7062,11 +7062,11 @@ This selects the quantizer to use for P-frames.
I- and B-frames are offset from this value by ip_factor and pb_factor, respectively.
20\-40 is a useful range (default: 26).
Lower values result in better fidelity, but higher bitrates.
-Note that quantization in H.264 works differently from MPEG-[124].
+Note that quantization in H.264 works differently from MPEG-1/2/4.
H.264's quantization parameter (QP) is on a logarithmic scale.
As an example, the bitrate difference between QP=20 and QP=40
is about a factor of 10.
-Useful quantizers in H.264 tend to be very large compared to MPEG-[124].
+Useful quantizers in H.264 tend to be very large compared to MPEG-1/2/4.
.
.TP
.B pass=<1\-3>
@@ -7118,13 +7118,17 @@ both fast and provide good quality.
.
.TP
.B keyint=<value>
-Sets maximum interval between I-frames.
+Sets maximum interval between IDR-frames (default: 250).
Larger values save bits, thus improve quality, at the cost of seeking
-precision (default: 250).
+precision.
+Unlike MPEG-1/2/4, H.264 does not suffer from DCT drift with large
+values of keyint.
.
.TP
-.B idrint=<value>
-Make each <value> I-frame an IDR-frame (default: 2).
+.B keyint_min=<1\-keyint/2>
+Sets minimum interval between IDR-frames (default: keyint * 0.4).
+If scenecuts appear within this interval, they are still encoded as
+I-frames, but do not start a new GOP.
In H.264, I-frames do not necessarily bound a closed GOP because it is
allowable for a P-frame to be predicted from more frames than just the one
frame before it (also see frameref).
@@ -7290,10 +7294,19 @@ i16x16, i4x4, b16x16, skip, direct.
See 4x4mv for details.
.
.TP
+.B (no)8x8mv
+Use additional macroblock types p16x8, p8x16, p8x8 (default: enabled).
+Without this option, P-frames will use only types
+i16x16, i4x4, p16x16, skip.
+This option is provided for experimentation only.
+It is not recommended to disable 8x8mv in a real encode.
+.
+.TP
.B (no)4x4mv
Use additional macroblock types p8x4, p4x8, p4x4 (default: disabled).
Without this option, P-frames will use only types
i16x16, i4x4, p16x16, p16x8, p8x16, p8x8, skip.
+Requires 8x8mv.
.br
The idea is to find the type and size that best describe a certain area
of the picture.
diff --git a/libmpcodecs/ve_x264.c b/libmpcodecs/ve_x264.c
index d4623d9613..c48bb71955 100644
--- a/libmpcodecs/ve_x264.c
+++ b/libmpcodecs/ve_x264.c
@@ -49,7 +49,7 @@
#include <x264.h>
-#if X264_BUILD < 0x000d
+#if X264_BUILD < 0x000e
#error We do not support old versions of x264. Get the latest from SVN.
#endif
@@ -65,8 +65,8 @@ extern char* passtmpfile;
static int bitrate = -1;
static int qp_constant = 26;
static int frame_ref = 1;
-static int iframe = 250;
-static int idrframe = 2;
+static int keyint_max = 250;
+static int keyint_min = -1;
static int scenecut_threshold = 40;
static int bframe = 0;
static int deblock = 1;
@@ -75,6 +75,7 @@ static int deblockbeta = 0;
static int cabac = 1;
static int cabacidc = -1;
static int p4x4mv = 0;
+static int p8x8mv = 1;
static int b8x8mv = 1;
static int direct_pred = X264_DIRECT_PRED_TEMPORAL;
static float ip_factor = 1.4;
@@ -98,8 +99,8 @@ m_option_t x264encopts_conf[] = {
{"bitrate", &bitrate, CONF_TYPE_INT, CONF_RANGE, 0, 24000000, NULL},
{"qp_constant", &qp_constant, CONF_TYPE_INT, CONF_RANGE, 1, 51, NULL},
{"frameref", &frame_ref, CONF_TYPE_INT, CONF_RANGE, 1, 15, NULL},
- {"keyint", &iframe, CONF_TYPE_INT, CONF_RANGE, 1, 24000000, NULL},
- {"idrint", &idrframe, CONF_TYPE_INT, CONF_RANGE, 1, 24000000, NULL},
+ {"keyint", &keyint_max, CONF_TYPE_INT, CONF_RANGE, 1, 24000000, NULL},
+ {"keyint_min", &keyint_min, CONF_TYPE_INT, CONF_RANGE, 1, 24000000, NULL},
{"scenecut", &scenecut_threshold, CONF_TYPE_INT, CONF_RANGE, -1, 100, NULL},
{"bframes", &bframe, CONF_TYPE_INT, CONF_RANGE, 0, 16, NULL},
{"deblock", &deblock, CONF_TYPE_FLAG, 0, 0, 1, NULL},
@@ -111,6 +112,8 @@ m_option_t x264encopts_conf[] = {
{"cabacidc", &cabacidc, CONF_TYPE_INT, CONF_RANGE, -1, 2, NULL},
{"4x4mv", &p4x4mv, CONF_TYPE_FLAG, 0, 0, 1, NULL},
{"no4x4mv", &p4x4mv, CONF_TYPE_FLAG, 0, 1, 0, NULL},
+ {"8x8mv", &p8x8mv, CONF_TYPE_FLAG, 0, 0, 1, NULL},
+ {"no8x8mv", &p8x8mv, CONF_TYPE_FLAG, 0, 1, 0, NULL},
{"b8x8mv", &b8x8mv, CONF_TYPE_FLAG, 0, 0, 1, NULL},
{"nob8x8mv", &b8x8mv, CONF_TYPE_FLAG, 0, 1, 0, NULL},
{"direct_pred", &direct_pred, CONF_TYPE_INT, CONF_RANGE, 0, 2, NULL},
@@ -143,8 +146,8 @@ static int config(struct vf_instance_s* vf, int width, int height, int d_width,
x264_param_default(&mod->param);
mod->param.i_frame_reference = frame_ref;
- mod->param.i_idrframe = idrframe;
- mod->param.i_iframe = iframe;
+ mod->param.i_keyint_max = keyint_max;
+ mod->param.i_keyint_min = keyint_min > 0 ? keyint_min : keyint_max * 2 / 5;
mod->param.i_scenecut_threshold = scenecut_threshold;
mod->param.i_bframe = bframe;
mod->param.b_deblocking_filter = deblock;
@@ -206,9 +209,11 @@ static int config(struct vf_instance_s* vf, int width, int height, int d_width,
}
mod->param.rc.f_ip_factor = ip_factor;
mod->param.rc.f_pb_factor = pb_factor;
- mod->param.analyse.inter = X264_ANALYSE_I4x4 | X264_ANALYSE_PSUB16x16;
+ mod->param.analyse.inter = X264_ANALYSE_I4x4;
if(p4x4mv)
mod->param.analyse.inter |= X264_ANALYSE_PSUB8x8;
+ if(p8x8mv)
+ mod->param.analyse.inter |= X264_ANALYSE_PSUB16x16;
if(b8x8mv)
mod->param.analyse.inter |= X264_ANALYSE_BSUB16x16;
mod->param.analyse.i_direct_mv_pred = direct_pred;
@@ -324,7 +329,8 @@ static int put_image(struct vf_instance_s *vf, mp_image_t *mpi)
}
if(i_size>0) {
int keyframe = (mod->pic.i_type == X264_TYPE_IDR) ||
- (mod->pic.i_type == X264_TYPE_I && frame_ref == 1);
+ (mod->pic.i_type == X264_TYPE_I
+ && frame_ref == 1 && !bframe);
muxer_write_chunk(mod->mux, i_size, keyframe?0x10:0);
}
return 1;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 21:24:11 +0000