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avdevice/v4l2: only use frame period from v4l2 if valid

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There is evidence that some drivers do not set a valid value

See: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718805
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-02-02 00:10:43 +01:00
parent 392b0345d6
commit 4aa4533ee8
1 changed files with 6 additions and 3 deletions
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9
libavdevice/v4l2.c
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@ -742,9 +742,12 @@ static int v4l2_set_parameters(AVFormatContext *s1)
"The driver does not allow to change time per frame\n");
}
}
s1->streams[0]->avg_frame_rate.num = tpf->denominator;
s1->streams[0]->avg_frame_rate.den = tpf->numerator;
s1->streams[0]->r_frame_rate = s1->streams[0]->avg_frame_rate;
if (tpf->denominator > 0 && tpf->numerator > 0) {
s1->streams[0]->avg_frame_rate.num = tpf->denominator;
s1->streams[0]->avg_frame_rate.den = tpf->numerator;
s1->streams[0]->r_frame_rate = s1->streams[0]->avg_frame_rate;
} else
av_log(s1, AV_LOG_WARNING, "Time per frame unknown\n");
return 0;
}