diff options
| -rw-r--r-- | DOCS/man/en/mplayer.1 | 10 | ||||
| -rw-r--r-- | libmpcodecs/ve_lavc.c | 3 |
2 files changed, 13 insertions, 0 deletions
diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1 index a57f1112e8..961f5b44dd 100644 --- a/DOCS/man/en/mplayer.1 +++ b/DOCS/man/en/mplayer.1 @@ -6831,6 +6831,16 @@ You can specify the sensitivity of the detection with this option. 1000000000 means no scene changes are detected (default: 0). . .TP +.B sc_factor=<any positive integer> +Causes frames with higher quantizers to be more likely to trigger a +scene change detection and make libavcodec use an I-frame (default: 1). +1\-16 is a sane range. +Values between 2 and 6 may yield increasing PSNR (up to approximately +0.04 dB) and better placement of I-frames in high-motion scenes. +Higher values than 6 may give very slightly better PSNR (approximately +0.01 dB more than sc_factor=6), but noticably worse visual quality. +. +.TP .B vb_strategy=<0\-2> (pass one only) strategy to choose between I/\:P/\:B-frames: .PD 0 diff --git a/libmpcodecs/ve_lavc.c b/libmpcodecs/ve_lavc.c index 16a55756af..8a9f10c00a 100644 --- a/libmpcodecs/ve_lavc.c +++ b/libmpcodecs/ve_lavc.c @@ -158,6 +158,7 @@ static int lavc_param_threads= 1; static int lavc_param_turbo = 0; static int lavc_param_brd_scale = 0; static int lavc_param_bidir_refine = 0; +static int lavc_param_sc_factor = 1; char *lavc_param_acodec = "mp2"; @@ -314,6 +315,7 @@ m_option_t lavcopts_conf[]={ {"turbo", &lavc_param_turbo, CONF_TYPE_FLAG, 0, 0, 1, NULL}, {"brd_scale", &lavc_param_brd_scale, CONF_TYPE_INT, CONF_RANGE, 0, 10, NULL}, {"bidir_refine", &lavc_param_bidir_refine, CONF_TYPE_INT, CONF_RANGE, 0, 4, NULL}, + {"sc_factor", &lavc_param_sc_factor, CONF_TYPE_INT, CONF_RANGE, 1, INT_MAX, NULL}, {NULL, NULL, 0, 0, 0, 0, NULL} }; #endif @@ -628,6 +630,7 @@ static int config(struct vf_instance_s* vf, lavc_venc_context->prediction_method= lavc_param_prediction_method; lavc_venc_context->brd_scale = lavc_param_brd_scale; lavc_venc_context->bidir_refine = lavc_param_bidir_refine; + lavc_venc_context->scenechange_factor = lavc_param_sc_factor; switch(lavc_param_format) { case IMGFMT_YV12: |