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| author | corey <corey@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-06-05 06:37:29 +0000 |
|---|---|---|
| committer | corey <corey@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-06-05 06:37:29 +0000 |
| commit | 5414825baccd2f78b8e18c5172390e83891d0a5d (patch) | |
| tree | a9b75e631210f3f2f5d284e5ce0cc18b18d94e10 | |
| parent | 52d2a448f8b26ecd1ad0a7ca684bfe2942a4e8f9 (diff) | |
| download | mpv-5414825baccd2f78b8e18c5172390e83891d0a5d.tar.bz2 mpv-5414825baccd2f78b8e18c5172390e83891d0a5d.tar.xz | |
Support and document lavc b_sensitivity option.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18573 b3059339-0415-0410-9bf9-f77b7e298cf2
| -rw-r--r-- | DOCS/man/en/mplayer.1 | 12 | ||||
| -rw-r--r-- | libmpcodecs/ve_lavc.c | 3 |
2 files changed, 15 insertions, 0 deletions
diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1 index ceff91994a..f491400585 100644 --- a/DOCS/man/en/mplayer.1 +++ b/DOCS/man/en/mplayer.1 @@ -7005,6 +7005,7 @@ strategy to choose between I/P/B-frames: Always use the maximum number of B-frames (default). .IPs 1 Avoid B-frames in high motion scenes. +See the b_sensitivity option to tune this strategy. .IPs 2 Places B-frames more or less optimally to yield maximum quality (slower). You may want to reduce the speed impact of this option by tuning the @@ -7013,6 +7014,17 @@ option brd_scale. .PD 1 . .TP +.B b_sensitivity=<any integer greater than 0> +Adjusts how sensitively vb_strategy=1 detects motion and avoids using +B-frames (default: 40). +Lower sensitivities will result in more B-frames. +Using more B-frames usually improves PSNR, but too many B-frames can +hurt quality in high-motion scenes. +Unless there is an extremely high amount of motion, b_sensitivity can +safely be lowered below the default; 10 is a reasonable value in most +cases. +. +.TP .B brd_scale=<0\-10> Downscales frames for dynamic B-frame decision (default: 0). Each time brd_scale is increased by one, the frame dimensions are diff --git a/libmpcodecs/ve_lavc.c b/libmpcodecs/ve_lavc.c index a6a1c9e28f..2eb23da516 100644 --- a/libmpcodecs/ve_lavc.c +++ b/libmpcodecs/ve_lavc.c @@ -162,6 +162,7 @@ static int lavc_param_sc_factor = 1; static int lavc_param_video_global_header= 0; static int lavc_param_mv0_threshold = 256; static int lavc_param_refs = 1; +static int lavc_param_b_sensitivity = 40; char *lavc_param_acodec = "mp2"; int lavc_param_atag = 0; @@ -323,6 +324,7 @@ m_option_t lavcopts_conf[]={ {"aglobal", &lavc_param_audio_global_header, CONF_TYPE_INT, CONF_RANGE, 0, INT_MAX, NULL}, {"mv0_threshold", &lavc_param_mv0_threshold, CONF_TYPE_INT, CONF_RANGE, 0, INT_MAX, NULL}, {"refs", &lavc_param_refs, CONF_TYPE_INT, CONF_RANGE, 1, 16, NULL}, + {"b_sensitivity", &lavc_param_b_sensitivity, CONF_TYPE_INT, CONF_RANGE, 1, INT_MAX, NULL}, {NULL, NULL, 0, 0, 0, 0, NULL} }; #endif @@ -655,6 +657,7 @@ static int config(struct vf_instance_s* vf, } lavc_venc_context->mv0_threshold = lavc_param_mv0_threshold; lavc_venc_context->refs = lavc_param_refs; + lavc_venc_context->b_sensitivity = lavc_param_b_sensitivity; switch(lavc_param_format) { |