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New lavc flag: "turbo" mode which is supposed to speed up 2-pass encoding

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while preserving quality as much as possible.
Inspired by XviD "turbo" mode.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13387 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
gpoirier 2004-09-19 09:59:05 +00:00
parent a33c90828e
commit 7fa1bf6c59
3 changed files with 41 additions and 1 deletions
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7
DOCS/man/en/mplayer.1
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@ -5327,6 +5327,13 @@ from the first pass.
.PD 1
.
.TP
.B turbo (2-pass only)
Dramatically speeds up pass 1 using faster algorithms and disabling
CPU-intensive options.
This will probably reduce global PSNR a little bit (around 0.01dB) and
change individual frame type and PSNR little bit more (up to 0.03dB).
.
.TP
.B aspect=<x/\:y>
Store movie aspect internally, just like MPEG files.
Much nicer solution than rescaling, because quality isn't decreased.

9
DOCS/man/fr/mplayer.1
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@ -1,4 +1,4 @@
.\" synced with 1.722
.\" synced with 1.723
.\" MPlayer (C) 2000-2004 MPlayer Team
.\" This man page was/is done by Gabucino, Diego Biurrun, Jonas Jermann
.\" Traduction: Nicolas Le Gaillart < nicolas AT legaillart.com >
@ -5568,6 +5568,13 @@ Encode avec une table Huffman optimis
.PD 1
.
.TP
.B turbo (2-pass uniquement)
Accélère énormément la première passe en utilisant des algorithmes plus
rapides et en désactivant des options gourmandes en temps processeur.
Cela va sans doute diminuer le PSNR global (d'environ 0.01dB) et changer
un peu plus le type et le PSNR des trames générées (jusqu'à 0.03dB).
.
.TP
.B aspect=<x/\:y>
Stocke le rapport hauteur/\:largeur du film en interne, tout comme les fichiers
MPEG.

26
libmpcodecs/ve_lavc.c
View File

@ -153,6 +153,7 @@ static int lavc_param_nssew= 8;
static int lavc_param_closed_gop = 0;
static int lavc_param_dc_precision = 8;
static int lavc_param_threads= 1;
static int lavc_param_turbo = 0;
char *lavc_param_acodec = "mp2";
@ -302,6 +303,7 @@ m_option_t lavcopts_conf[]={
{"qns", &lavc_param_qns, CONF_TYPE_INT, CONF_RANGE, 0, 1000000, NULL},
{"nssew", &lavc_param_nssew, CONF_TYPE_INT, CONF_RANGE, 0, 1000000, NULL},
{"threads", &lavc_param_threads, CONF_TYPE_INT, CONF_RANGE, 1, 8, NULL},
{"turbo", &lavc_param_turbo, CONF_TYPE_FLAG, 0, 0, 1, NULL},
{NULL, NULL, 0, 0, 0, 0, NULL}
};
#endif
@ -666,6 +668,30 @@ static int config(struct vf_instance_s* vf,
mp_msg(MSGT_MENCODER,MSGL_ERR,"2pass failed: filename=%s\n", passtmpfile);
return 0;
}
if(lavc_param_turbo) {
/* uses SAD comparison functions instead of other hungrier */
lavc_venc_context->me_pre_cmp = 0;
lavc_venc_context->me_cmp = 0;
lavc_venc_context->me_sub_cmp = 0;
lavc_venc_context->mb_cmp = 2;
/* Disables diamond motion estimation */
lavc_venc_context->pre_dia_size = 0;
lavc_venc_context->dia_size = 0;
lavc_venc_context->quantizer_noise_shaping = 0; // qns=0
lavc_venc_context->noise_reduction = 0; // nr=0
if (lavc_param_mb_decision) {
lavc_venc_context->mb_decision = 1; // mbd=0 ("realtime" encoding)
}
lavc_venc_context->flags &= ~CODEC_FLAG_QPEL;
lavc_venc_context->flags &= ~CODEC_FLAG_4MV;
lavc_venc_context->flags &= ~CODEC_FLAG_TRELLIS_QUANT;
lavc_venc_context->flags &= ~CODEC_FLAG_CBP_RD;
lavc_venc_context->flags &= ~CODEC_FLAG_QP_RD;
lavc_venc_context->flags &= ~CODEC_FLAG_MV0;
}
break;
}
}