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ffmpeg.wasm-core
Commit 2f3b419c authored by Aurelien Jacobs's avatar Aurelien Jacobs
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Don't pre-scale default_duration to avoid precision loss in fps calculation. 

closes Issue95

Originally committed as revision 10127 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent aec783d4
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Showing with 5 additions and 5 deletions
libavformat/matroskadec.c
View file @ 2f3b419c
......@@ -1089,7 +1089,7 @@ matroska_add_stream (MatroskaDemuxContext *matroska)
if ((res = ebml_read_uint (matroska, &id,
&num)) < 0)
break;
track->default_duration = num/matroska->time_scale;
track->default_duration = num;
break;
}
......@@ -1100,7 +1100,7 @@ matroska_add_stream (MatroskaDemuxContext *matroska)
&num)) < 0)
break;
if (!track->default_duration)
track->default_duration = 1000000000/(matroska->time_scale*num);
track->default_duration = 1000000000/num;
break;
}
......@@ -1407,7 +1407,7 @@ matroska_add_stream (MatroskaDemuxContext *matroska)
uint64_t num;
if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
break;
track->default_duration = num / matroska->time_scale;
track->default_duration = num;
break;
}
......@@ -2174,7 +2174,7 @@ matroska_read_header (AVFormatContext *s,
if (track->default_duration)
av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
track->default_duration, 1000, 30000);
track->default_duration, 1000000000, 30000);
if(extradata){
st->codec->extradata = extradata;
......@@ -2283,7 +2283,7 @@ matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size,
return res;
}
if (duration == AV_NOPTS_VALUE)
duration = matroska->tracks[track]->default_duration;
duration = matroska->tracks[track]->default_duration / matroska->time_scale;
/* block_time (relative to cluster time) */
block_time = AV_RB16(data);
......
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