*
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file ratecontrol.c
+ * @file libavcodec/ratecontrol.c
* Rate control for video encoders.
*/
#include "avcodec.h"
#include "dsputil.h"
+#include "ratecontrol.h"
#include "mpegvideo.h"
+#include "eval.h"
-#undef NDEBUG // allways check asserts, the speed effect is far too small to disable them
+#undef NDEBUG // Always check asserts, the speed effect is far too small to disable them.
#include <assert.h>
#ifndef M_E
s->f_code, s->b_code, s->current_picture.mc_mb_var_sum, s->current_picture.mb_var_sum, s->i_count, s->skip_count, s->header_bits);
}
+static inline double qp2bits(RateControlEntry *rce, double qp){
+ if(qp<=0.0){
+ av_log(NULL, AV_LOG_ERROR, "qp<=0.0\n");
+ }
+ return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ qp;
+}
+
+static inline double bits2qp(RateControlEntry *rce, double bits){
+ if(bits<0.9){
+ av_log(NULL, AV_LOG_ERROR, "bits<0.9\n");
+ }
+ return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ bits;
+}
+
int ff_rate_control_init(MpegEncContext *s)
{
RateControlContext *rcc= &s->rc_context;
int i;
+ const char *error = NULL;
+ static const char * const const_names[]={
+ "PI",
+ "E",
+ "iTex",
+ "pTex",
+ "tex",
+ "mv",
+ "fCode",
+ "iCount",
+ "mcVar",
+ "var",
+ "isI",
+ "isP",
+ "isB",
+ "avgQP",
+ "qComp",
+/* "lastIQP",
+ "lastPQP",
+ "lastBQP",
+ "nextNonBQP",*/
+ "avgIITex",
+ "avgPITex",
+ "avgPPTex",
+ "avgBPTex",
+ "avgTex",
+ NULL
+ };
+ static double (* const func1[])(void *, double)={
+ (void *)bits2qp,
+ (void *)qp2bits,
+ NULL
+ };
+ static const char * const func1_names[]={
+ "bits2qp",
+ "qp2bits",
+ NULL
+ };
emms_c();
+ rcc->rc_eq_eval = ff_parse(s->avctx->rc_eq ? s->avctx->rc_eq : "tex^qComp", const_names, func1, func1_names, NULL, NULL, &error);
+ if (!rcc->rc_eq_eval) {
+ av_log(s->avctx, AV_LOG_ERROR, "Error parsing rc_eq \"%s\": %s\n", s->avctx->rc_eq, error? error : "");
+ return -1;
+ }
+
for(i=0; i<5; i++){
rcc->pred[i].coeff= FF_QP2LAMBDA * 7.0;
rcc->pred[i].count= 1.0;
rcc->p_cplx_sum [i]=
rcc->mv_bits_sum[i]=
rcc->qscale_sum [i]=
- rcc->frame_count[i]= 1; // 1 is better cuz of 1/0 and such
+ rcc->frame_count[i]= 1; // 1 is better because of 1/0 and such
rcc->last_qscale_for[i]=FF_QP2LAMBDA * 5;
}
rcc->buffer_index= s->avctx->rc_initial_buffer_occupancy;
i+= s->max_b_frames;
if(i<=0 || i>=INT_MAX / sizeof(RateControlEntry))
return -1;
- rcc->entry = (RateControlEntry*)av_mallocz(i*sizeof(RateControlEntry));
+ rcc->entry = av_mallocz(i*sizeof(RateControlEntry));
rcc->num_entries= i;
/* init all to skipped p frames (with b frames we might have a not encoded frame at the end FIXME) */
for(i=0; i<rcc->num_entries; i++){
RateControlEntry *rce= &rcc->entry[i];
- rce->pict_type= rce->new_pict_type=P_TYPE;
+ rce->pict_type= rce->new_pict_type=FF_P_TYPE;
rce->qscale= rce->new_qscale=FF_QP2LAMBDA * 2;
rce->misc_bits= s->mb_num + 10;
rce->mb_var_sum= s->mb_num*100;
next= strchr(p, ';');
if(next){
- (*next)=0; //sscanf in unbelieavle slow on looong strings //FIXME copy / dont write
+ (*next)=0; //sscanf in unbelievably slow on looong strings //FIXME copy / do not write
next++;
}
e= sscanf(p, " in:%d ", &picture_number);
p= next;
}
+ if(init_pass2(s) < 0) return -1;
+
//FIXME maybe move to end
- if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
+ if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) {
+#if CONFIG_LIBXVID
return ff_xvid_rate_control_init(s);
-
- if(init_pass2(s) < 0) return -1;
+#else
+ av_log(s->avctx, AV_LOG_ERROR, "Xvid ratecontrol requires libavcodec compiled with Xvid support.\n");
+ return -1;
+#endif
+ }
}
if(!(s->flags&CODEC_FLAG_PASS2)){
rcc->pass1_rc_eq_output_sum= 0.001;
rcc->pass1_wanted_bits=0.001;
+ if(s->avctx->qblur > 1.0){
+ av_log(s->avctx, AV_LOG_ERROR, "qblur too large\n");
+ return -1;
+ }
/* init stuff with the user specified complexity */
if(s->avctx->rc_initial_cplx){
for(i=0; i<60*30; i++){
double bits= s->avctx->rc_initial_cplx * (i/10000.0 + 1.0)*s->mb_num;
RateControlEntry rce;
- double q;
- if (i%((s->gop_size+3)/4)==0) rce.pict_type= I_TYPE;
- else if(i%(s->max_b_frames+1)) rce.pict_type= B_TYPE;
- else rce.pict_type= P_TYPE;
+ if (i%((s->gop_size+3)/4)==0) rce.pict_type= FF_I_TYPE;
+ else if(i%(s->max_b_frames+1)) rce.pict_type= FF_B_TYPE;
+ else rce.pict_type= FF_P_TYPE;
rce.new_pict_type= rce.pict_type;
rce.mc_mb_var_sum= bits*s->mb_num/100000;
rce.b_code = 1;
rce.misc_bits= 1;
- if(s->pict_type== I_TYPE){
+ if(s->pict_type== FF_I_TYPE){
rce.i_count = s->mb_num;
rce.i_tex_bits= bits;
rce.p_tex_bits= 0;
rcc->mv_bits_sum[rce.pict_type] += rce.mv_bits;
rcc->frame_count[rce.pict_type] ++;
- bits= rce.i_tex_bits + rce.p_tex_bits;
-
- q= get_qscale(s, &rce, rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum, i);
- rcc->pass1_wanted_bits+= s->bit_rate/(1/av_q2d(s->avctx->time_base)); //FIXME missbehaves a little for variable fps
+ get_qscale(s, &rce, rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum, i);
+ rcc->pass1_wanted_bits+= s->bit_rate/(1/av_q2d(s->avctx->time_base)); //FIXME misbehaves a little for variable fps
}
}
RateControlContext *rcc= &s->rc_context;
emms_c();
+ ff_eval_free(rcc->rc_eq_eval);
av_freep(&rcc->entry);
+#if CONFIG_LIBXVID
if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
ff_xvid_rate_control_uninit(s);
-}
-
-static inline double qp2bits(RateControlEntry *rce, double qp){
- if(qp<=0.0){
- av_log(NULL, AV_LOG_ERROR, "qp<=0.0\n");
- }
- return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ qp;
-}
-
-static inline double bits2qp(RateControlEntry *rce, double bits){
- if(bits<0.9){
- av_log(NULL, AV_LOG_ERROR, "bits<0.9\n");
- }
- return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ bits;
+#endif
}
int ff_vbv_update(MpegEncContext *s, int frame_size){
}
left= buffer_size - rcc->buffer_index - 1;
- rcc->buffer_index += clip(left, min_rate, max_rate);
+ rcc->buffer_index += av_clip(left, min_rate, max_rate);
if(rcc->buffer_index > buffer_size){
int stuffing= ceil((rcc->buffer_index - buffer_size)/8);
rce->p_tex_bits*rce->qscale,
(rce->i_tex_bits + rce->p_tex_bits)*(double)rce->qscale,
rce->mv_bits/mb_num,
- rce->pict_type == B_TYPE ? (rce->f_code + rce->b_code)*0.5 : rce->f_code,
+ rce->pict_type == FF_B_TYPE ? (rce->f_code + rce->b_code)*0.5 : rce->f_code,
rce->i_count/mb_num,
rce->mc_mb_var_sum/mb_num,
rce->mb_var_sum/mb_num,
- rce->pict_type == I_TYPE,
- rce->pict_type == P_TYPE,
- rce->pict_type == B_TYPE,
+ rce->pict_type == FF_I_TYPE,
+ rce->pict_type == FF_P_TYPE,
+ rce->pict_type == FF_B_TYPE,
rcc->qscale_sum[pict_type] / (double)rcc->frame_count[pict_type],
a->qcompress,
-/* rcc->last_qscale_for[I_TYPE],
- rcc->last_qscale_for[P_TYPE],
- rcc->last_qscale_for[B_TYPE],
+/* rcc->last_qscale_for[FF_I_TYPE],
+ rcc->last_qscale_for[FF_P_TYPE],
+ rcc->last_qscale_for[FF_B_TYPE],
rcc->next_non_b_qscale,*/
- rcc->i_cplx_sum[I_TYPE] / (double)rcc->frame_count[I_TYPE],
- rcc->i_cplx_sum[P_TYPE] / (double)rcc->frame_count[P_TYPE],
- rcc->p_cplx_sum[P_TYPE] / (double)rcc->frame_count[P_TYPE],
- rcc->p_cplx_sum[B_TYPE] / (double)rcc->frame_count[B_TYPE],
+ rcc->i_cplx_sum[FF_I_TYPE] / (double)rcc->frame_count[FF_I_TYPE],
+ rcc->i_cplx_sum[FF_P_TYPE] / (double)rcc->frame_count[FF_P_TYPE],
+ rcc->p_cplx_sum[FF_P_TYPE] / (double)rcc->frame_count[FF_P_TYPE],
+ rcc->p_cplx_sum[FF_B_TYPE] / (double)rcc->frame_count[FF_B_TYPE],
(rcc->i_cplx_sum[pict_type] + rcc->p_cplx_sum[pict_type]) / (double)rcc->frame_count[pict_type],
0
};
- static const char *const_names[]={
- "PI",
- "E",
- "iTex",
- "pTex",
- "tex",
- "mv",
- "fCode",
- "iCount",
- "mcVar",
- "var",
- "isI",
- "isP",
- "isB",
- "avgQP",
- "qComp",
-/* "lastIQP",
- "lastPQP",
- "lastBQP",
- "nextNonBQP",*/
- "avgIITex",
- "avgPITex",
- "avgPPTex",
- "avgBPTex",
- "avgTex",
- NULL
- };
- static double (*func1[])(void *, double)={
- (void *)bits2qp,
- (void *)qp2bits,
- NULL
- };
- static const char *func1_names[]={
- "bits2qp",
- "qp2bits",
- NULL
- };
- bits= ff_eval(s->avctx->rc_eq, const_values, const_names, func1, func1_names, NULL, NULL, rce);
+ bits= ff_parse_eval(rcc->rc_eq_eval, const_values, rce);
+ if (isnan(bits)) {
+ av_log(s->avctx, AV_LOG_ERROR, "Error evaluating rc_eq \"%s\"\n", s->avctx->rc_eq);
+ return -1;
+ }
rcc->pass1_rc_eq_output_sum+= bits;
bits*=rate_factor;
q= bits2qp(rce, bits);
/* I/B difference */
- if (pict_type==I_TYPE && s->avctx->i_quant_factor<0.0)
+ if (pict_type==FF_I_TYPE && s->avctx->i_quant_factor<0.0)
q= -q*s->avctx->i_quant_factor + s->avctx->i_quant_offset;
- else if(pict_type==B_TYPE && s->avctx->b_quant_factor<0.0)
+ else if(pict_type==FF_B_TYPE && s->avctx->b_quant_factor<0.0)
q= -q*s->avctx->b_quant_factor + s->avctx->b_quant_offset;
+ if(q<1) q=1;
return q;
}
RateControlContext *rcc= &s->rc_context;
AVCodecContext *a= s->avctx;
const int pict_type= rce->new_pict_type;
- const double last_p_q = rcc->last_qscale_for[P_TYPE];
+ const double last_p_q = rcc->last_qscale_for[FF_P_TYPE];
const double last_non_b_q= rcc->last_qscale_for[rcc->last_non_b_pict_type];
- if (pict_type==I_TYPE && (a->i_quant_factor>0.0 || rcc->last_non_b_pict_type==P_TYPE))
- q= last_p_q *ABS(a->i_quant_factor) + a->i_quant_offset;
- else if(pict_type==B_TYPE && a->b_quant_factor>0.0)
+ if (pict_type==FF_I_TYPE && (a->i_quant_factor>0.0 || rcc->last_non_b_pict_type==FF_P_TYPE))
+ q= last_p_q *FFABS(a->i_quant_factor) + a->i_quant_offset;
+ else if(pict_type==FF_B_TYPE && a->b_quant_factor>0.0)
q= last_non_b_q* a->b_quant_factor + a->b_quant_offset;
+ if(q<1) q=1;
/* last qscale / qdiff stuff */
- if(rcc->last_non_b_pict_type==pict_type || pict_type!=I_TYPE){
+ if(rcc->last_non_b_pict_type==pict_type || pict_type!=FF_I_TYPE){
double last_q= rcc->last_qscale_for[pict_type];
const int maxdiff= FF_QP2LAMBDA * a->max_qdiff;
else if(q < last_q - maxdiff) q= last_q - maxdiff;
}
- rcc->last_qscale_for[pict_type]= q; //Note we cant do that after blurring
+ rcc->last_qscale_for[pict_type]= q; //Note we cannot do that after blurring
- if(pict_type!=B_TYPE)
+ if(pict_type!=FF_B_TYPE)
rcc->last_non_b_pict_type= pict_type;
return q;
assert(qmin <= qmax);
- if(pict_type==B_TYPE){
- qmin= (int)(qmin*ABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
- qmax= (int)(qmax*ABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
- }else if(pict_type==I_TYPE){
- qmin= (int)(qmin*ABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
- qmax= (int)(qmax*ABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
+ if(pict_type==FF_B_TYPE){
+ qmin= (int)(qmin*FFABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
+ qmax= (int)(qmax*FFABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
+ }else if(pict_type==FF_I_TYPE){
+ qmin= (int)(qmin*FFABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
+ qmax= (int)(qmax*FFABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
}
- qmin= clip(qmin, 1, FF_LAMBDA_MAX);
- qmax= clip(qmax, 1, FF_LAMBDA_MAX);
+ qmin= av_clip(qmin, 1, FF_LAMBDA_MAX);
+ qmax= av_clip(qmax, 1, FF_LAMBDA_MAX);
if(qmax<qmin) qmax= qmin;
static double modify_qscale(MpegEncContext *s, RateControlEntry *rce, double q, int frame_num){
RateControlContext *rcc= &s->rc_context;
int qmin, qmax;
- double bits;
const int pict_type= rce->new_pict_type;
const double buffer_size= s->avctx->rc_buffer_size;
const double fps= 1/av_q2d(s->avctx->time_base);
get_qminmax(&qmin, &qmax, s, pict_type);
/* modulation */
- if(s->avctx->rc_qmod_freq && frame_num%s->avctx->rc_qmod_freq==0 && pict_type==P_TYPE)
+ if(s->avctx->rc_qmod_freq && frame_num%s->avctx->rc_qmod_freq==0 && pict_type==FF_P_TYPE)
q*= s->avctx->rc_qmod_amp;
- bits= qp2bits(rce, q);
//printf("q:%f\n", q);
/* buffer overflow/underflow protection */
if(buffer_size){
else if(d<0.0001) d=0.0001;
q*= pow(d, 1.0/s->avctx->rc_buffer_aggressivity);
- q_limit= bits2qp(rce, FFMAX((min_rate - buffer_size + rcc->buffer_index)*3, 1));
+ q_limit= bits2qp(rce, FFMAX((min_rate - buffer_size + rcc->buffer_index) * s->avctx->rc_min_vbv_overflow_use, 1));
if(q > q_limit){
if(s->avctx->debug&FF_DEBUG_RC){
av_log(s->avctx, AV_LOG_DEBUG, "limiting QP %f -> %f\n", q, q_limit);
else if(d<0.0001) d=0.0001;
q/= pow(d, 1.0/s->avctx->rc_buffer_aggressivity);
- q_limit= bits2qp(rce, FFMAX(rcc->buffer_index/3, 1));
+ q_limit= bits2qp(rce, FFMAX(rcc->buffer_index * s->avctx->rc_max_available_vbv_use, 1));
if(q < q_limit){
if(s->avctx->debug&FF_DEBUG_RC){
av_log(s->avctx, AV_LOG_DEBUG, "limiting QP %f -> %f\n", q, q_limit);
bits_tab[i]= bits;
}
- /* handle qmin/qmax cliping */
+ /* handle qmin/qmax clipping */
if(s->flags&CODEC_FLAG_NORMALIZE_AQP){
float factor= bits_sum/cplx_sum;
for(i=0; i<s->mb_num; i++){
Picture * const pic= &s->current_picture;
emms_c();
+#if CONFIG_LIBXVID
if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
return ff_xvid_rate_estimate_qscale(s, dry_run);
+#endif
get_qminmax(&qmin, &qmax, s, pict_type);
//printf("input_pic_num:%d pic_num:%d frame_rate:%d\n", s->input_picture_number, s->picture_number, s->frame_rate);
/* update predictors */
if(picture_number>2 && !dry_run){
- const int last_var= s->last_pict_type == I_TYPE ? rcc->last_mb_var_sum : rcc->last_mc_mb_var_sum;
+ const int last_var= s->last_pict_type == FF_I_TYPE ? rcc->last_mb_var_sum : rcc->last_mc_mb_var_sum;
update_predictor(&rcc->pred[s->last_pict_type], rcc->last_qscale, sqrt(last_var), s->frame_bits);
}
rce= &rcc->entry[picture_number];
wanted_bits= rce->expected_bits;
}else{
+ Picture *dts_pic;
rce= &local_rce;
- wanted_bits= (uint64_t)(s->bit_rate*(double)picture_number/fps);
+
+ //FIXME add a dts field to AVFrame and ensure its set and use it here instead of reordering
+ //but the reordering is simpler for now until h.264 b pyramid must be handeld
+ if(s->pict_type == FF_B_TYPE || s->low_delay)
+ dts_pic= s->current_picture_ptr;
+ else
+ dts_pic= s->last_picture_ptr;
+
+//if(dts_pic)
+// av_log(NULL, AV_LOG_ERROR, "%Ld %Ld %Ld %d\n", s->current_picture_ptr->pts, s->user_specified_pts, dts_pic->pts, picture_number);
+
+ if(!dts_pic || dts_pic->pts == AV_NOPTS_VALUE)
+ wanted_bits= (uint64_t)(s->bit_rate*(double)picture_number/fps);
+ else
+ wanted_bits= (uint64_t)(s->bit_rate*(double)dts_pic->pts/fps);
}
diff= s->total_bits - wanted_bits;
br_compensation= (a->bit_rate_tolerance - diff)/a->bit_rate_tolerance;
if(br_compensation<=0.0) br_compensation=0.001;
- var= pict_type == I_TYPE ? pic->mb_var_sum : pic->mc_mb_var_sum;
+ var= pict_type == FF_I_TYPE ? pic->mb_var_sum : pic->mc_mb_var_sum;
short_term_q = 0; /* avoid warning */
if(s->flags&CODEC_FLAG_PASS2){
- if(pict_type!=I_TYPE)
+ if(pict_type!=FF_I_TYPE)
assert(pict_type == rce->new_pict_type);
q= rce->new_qscale / br_compensation;
rce->misc_bits= 1;
bits= predict_size(&rcc->pred[pict_type], rce->qscale, sqrt(var));
- if(pict_type== I_TYPE){
+ if(pict_type== FF_I_TYPE){
rce->i_count = s->mb_num;
rce->i_tex_bits= bits;
rce->p_tex_bits= 0;
rate_factor= rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum * br_compensation;
q= get_qscale(s, rce, rate_factor, picture_number);
+ if (q < 0)
+ return -1;
assert(q>0.0);
//printf("%f ", q);
//printf("%f ", q);
assert(q>0.0);
- if(pict_type==P_TYPE || s->intra_only){ //FIXME type dependant blur like in 2-pass
+ if(pict_type==FF_P_TYPE || s->intra_only){ //FIXME type dependent blur like in 2-pass
rcc->short_term_qsum*=a->qblur;
rcc->short_term_qcount*=a->qblur;
{
RateControlContext *rcc= &s->rc_context;
AVCodecContext *a= s->avctx;
- int i;
+ int i, toobig;
double fps= 1/av_q2d(s->avctx->time_base);
double complexity[5]={0,0,0,0,0}; // aproximate bits at quant=1
- double avg_quantizer[5];
- uint64_t const_bits[5]={0,0,0,0,0}; // quantizer idependant bits
- uint64_t available_bits[5];
+ uint64_t const_bits[5]={0,0,0,0,0}; // quantizer independent bits
uint64_t all_const_bits;
uint64_t all_available_bits= (uint64_t)(s->bit_rate*(double)rcc->num_entries/fps);
double rate_factor=0;
//int last_i_frame=-10000000;
const int filter_size= (int)(a->qblur*4) | 1;
double expected_bits;
- double *qscale, *blured_qscale;
+ double *qscale, *blurred_qscale, qscale_sum;
/* find complexity & const_bits & decide the pict_types */
for(i=0; i<rcc->num_entries; i++){
complexity[rce->new_pict_type]+= (rce->i_tex_bits+ rce->p_tex_bits)*(double)rce->qscale;
const_bits[rce->new_pict_type]+= rce->mv_bits + rce->misc_bits;
}
- all_const_bits= const_bits[I_TYPE] + const_bits[P_TYPE] + const_bits[B_TYPE];
+ all_const_bits= const_bits[FF_I_TYPE] + const_bits[FF_P_TYPE] + const_bits[FF_B_TYPE];
if(all_available_bits < all_const_bits){
- av_log(s->avctx, AV_LOG_ERROR, "requested bitrate is to low\n");
+ av_log(s->avctx, AV_LOG_ERROR, "requested bitrate is too low\n");
return -1;
}
- /* find average quantizers */
- avg_quantizer[P_TYPE]=0;
- for(step=256*256; step>0.0000001; step*=0.5){
- double expected_bits=0;
- avg_quantizer[P_TYPE]+= step;
-
- avg_quantizer[I_TYPE]= avg_quantizer[P_TYPE]*ABS(s->avctx->i_quant_factor) + s->avctx->i_quant_offset;
- avg_quantizer[B_TYPE]= avg_quantizer[P_TYPE]*ABS(s->avctx->b_quant_factor) + s->avctx->b_quant_offset;
-
- expected_bits=
- + all_const_bits
- + complexity[I_TYPE]/avg_quantizer[I_TYPE]
- + complexity[P_TYPE]/avg_quantizer[P_TYPE]
- + complexity[B_TYPE]/avg_quantizer[B_TYPE];
-
- if(expected_bits < all_available_bits) avg_quantizer[P_TYPE]-= step;
-//printf("%f %lld %f\n", expected_bits, all_available_bits, avg_quantizer[P_TYPE]);
- }
-//printf("qp_i:%f, qp_p:%f, qp_b:%f\n", avg_quantizer[I_TYPE],avg_quantizer[P_TYPE],avg_quantizer[B_TYPE]);
-
- for(i=0; i<5; i++){
- available_bits[i]= const_bits[i] + complexity[i]/avg_quantizer[i];
- }
-//printf("%lld %lld %lld %lld\n", available_bits[I_TYPE], available_bits[P_TYPE], available_bits[B_TYPE], all_available_bits);
-
qscale= av_malloc(sizeof(double)*rcc->num_entries);
- blured_qscale= av_malloc(sizeof(double)*rcc->num_entries);
+ blurred_qscale= av_malloc(sizeof(double)*rcc->num_entries);
+ toobig = 0;
for(step=256*256; step>0.0000001; step*=0.5){
expected_bits=0;
q+= qscale[index] * coeff;
sum+= coeff;
}
- blured_qscale[i]= q/sum;
+ blurred_qscale[i]= q/sum;
}
/* find expected bits */
for(i=0; i<rcc->num_entries; i++){
RateControlEntry *rce= &rcc->entry[i];
double bits;
- rce->new_qscale= modify_qscale(s, rce, blured_qscale[i], i);
+ rce->new_qscale= modify_qscale(s, rce, blurred_qscale[i], i);
bits= qp2bits(rce, rce->new_qscale) + rce->mv_bits + rce->misc_bits;
-//printf("%d %f\n", rce->new_bits, blured_qscale[i]);
+//printf("%d %f\n", rce->new_bits, blurred_qscale[i]);
bits += 8*ff_vbv_update(s, bits);
rce->expected_bits= expected_bits;
expected_bits += bits;
}
-// printf("%f %d %f\n", expected_bits, (int)all_available_bits, rate_factor);
- if(expected_bits > all_available_bits) rate_factor-= step;
+ /*
+ av_log(s->avctx, AV_LOG_INFO,
+ "expected_bits: %f all_available_bits: %d rate_factor: %f\n",
+ expected_bits, (int)all_available_bits, rate_factor);
+ */
+ if(expected_bits > all_available_bits) {
+ rate_factor-= step;
+ ++toobig;
+ }
}
av_free(qscale);
- av_free(blured_qscale);
+ av_free(blurred_qscale);
- if(abs(expected_bits/all_available_bits - 1.0) > 0.01 ){
- av_log(s->avctx, AV_LOG_ERROR, "Error: 2pass curve failed to converge\n");
+ /* check bitrate calculations and print info */
+ qscale_sum = 0.0;
+ for(i=0; i<rcc->num_entries; i++){
+ /* av_log(s->avctx, AV_LOG_DEBUG, "[lavc rc] entry[%d].new_qscale = %.3f qp = %.3f\n",
+ i, rcc->entry[i].new_qscale, rcc->entry[i].new_qscale / FF_QP2LAMBDA); */
+ qscale_sum += av_clip(rcc->entry[i].new_qscale / FF_QP2LAMBDA, s->avctx->qmin, s->avctx->qmax);
+ }
+ assert(toobig <= 40);
+ av_log(s->avctx, AV_LOG_DEBUG,
+ "[lavc rc] requested bitrate: %d bps expected bitrate: %d bps\n",
+ s->bit_rate,
+ (int)(expected_bits / ((double)all_available_bits/s->bit_rate)));
+ av_log(s->avctx, AV_LOG_DEBUG,
+ "[lavc rc] estimated target average qp: %.3f\n",
+ (float)qscale_sum / rcc->num_entries);
+ if (toobig == 0) {
+ av_log(s->avctx, AV_LOG_INFO,
+ "[lavc rc] Using all of requested bitrate is not "
+ "necessary for this video with these parameters.\n");
+ } else if (toobig == 40) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "[lavc rc] Error: bitrate too low for this video "
+ "with these parameters.\n");
+ return -1;
+ } else if (fabs(expected_bits/all_available_bits - 1.0) > 0.01) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "[lavc rc] Error: 2pass curve failed to converge\n");
return -1;
}
projects / frescor / ffmpeg.git / blobdiff