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Ensure that there's pages to read for duration calculation in the ogg demuxer
Originally committed as revision 18523 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@@ -450,7 +450,7 @@ ogg_get_length (AVFormatContext * s)
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size = url_fsize(s->pb);
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if(size < 0)
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return 0;
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end = size > MAX_PAGE_SIZE? size - MAX_PAGE_SIZE: size;
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end = size > MAX_PAGE_SIZE? size - MAX_PAGE_SIZE: 0;
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ogg_save (s);
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url_fseek (s->pb, end, SEEK_SET);
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