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automatic framerate selection
Originally committed as revision 3132 to svn://svn.ffmpeg.org/ffmpeg/trunk
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parent
fcee016467
commit
22f7a0601e
19
ffmpeg.c
19
ffmpeg.c
@ -17,6 +17,7 @@
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define HAVE_AV_CONFIG_H
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#include <limits.h>
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#include "avformat.h"
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#include "framehook.h"
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@ -2751,18 +2752,34 @@ static void opt_output_file(const char *filename)
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codec_id = video_codec_id;
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video_enc->codec_id = codec_id;
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codec = avcodec_find_encoder(codec_id);
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video_enc->bit_rate = video_bit_rate;
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video_enc->bit_rate_tolerance = video_bit_rate_tolerance;
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video_enc->frame_rate = frame_rate;
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video_enc->frame_rate_base = frame_rate_base;
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if(codec && codec->supported_framerates){
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const AVRational *p= codec->supported_framerates;
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AVRational req= (AVRational){frame_rate, frame_rate_base};
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const AVRational *best=NULL;
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AVRational best_error= (AVRational){INT_MAX, 1};
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for(; p->den!=0; p++){
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AVRational error= av_sub_q(req, *p);
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if(error.num <0) error.num *= -1;
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if(av_cmp_q(error, best_error) < 0){
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best_error= error;
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best= p;
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}
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}
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video_enc->frame_rate = best->num;
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video_enc->frame_rate_base= best->den;
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}
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video_enc->width = frame_width + frame_padright + frame_padleft;
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video_enc->height = frame_height + frame_padtop + frame_padbottom;
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video_enc->sample_aspect_ratio = av_d2q(frame_aspect_ratio*frame_height/frame_width, 255);
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video_enc->pix_fmt = frame_pix_fmt;
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codec = avcodec_find_encoder(codec_id);
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if(codec && codec->pix_fmts){
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const enum PixelFormat *p= codec->pix_fmts;
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for(; *p!=-1; p++){
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