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Updated getProperty method in old ffmpeg wrapper

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This commit is contained in:
Alexander Reshetnikov 2012-04-09 15:16:59 +00:00
parent 6fa2f3b74d
commit 3514042b29
1 changed files with 16 additions and 4 deletions
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20
modules/highgui/src/cap_ffmpeg_impl.hpp
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@ -554,10 +554,22 @@ double CvCapture_FFMPEG::getProperty( int property_id )
if(video_st->cur_dts != AV_NOPTS_VALUE_ && video_st->duration != AV_NOPTS_VALUE_)
return(((video_st->cur_dts-video_st->first_dts)+(1.0/frameScale)) / (double)video_st->duration);
break;
case CV_FFMPEG_CAP_PROP_FRAME_COUNT:
if(video_st->duration != AV_NOPTS_VALUE_)
return (double)ceil(ic->duration * av_q2d(video_st->r_frame_rate) / AV_TIME_BASE);
break;
case CV_FFMPEG_CAP_PROP_FRAME_COUNT:
{
int64_t nbf = ic->streams[video_stream]->nb_frames;
double eps = 0.000025;
if (nbf == 0)
{
double fps = static_cast<double>(ic->streams[video_stream]->r_frame_rate.num) / static_cast<double>(ic->streams[video_stream]->r_frame_rate.den);
if (fps < eps)
{
fps = 1.0 / (static_cast<double>(ic->streams[video_stream]->codec->time_base.num) / static_cast<double>(ic->streams[video_stream]->codec->time_base.den));
}
nbf = static_cast<int64_t>(round(ic->duration * fps) / AV_TIME_BASE);
}
return nbf;
}
break;
case CV_FFMPEG_CAP_PROP_FRAME_WIDTH:
return (double)frame.width;
break;