frame rate for AVI broken

[bjarthur]

julia> VideoIO.framerate(video_reader)
1//0

but if instead i examine the code for seek i can get the correct value:

julia> convert(Rational, video_reader.avin.format_context.streams[1].time_base)
1//10

the framerate method is currently defined as

framerate(f::VideoReader) = f.codec_context.time_base.den // f.codec_context.time_base.num

presumably that works for some formats, just not AVI. what's the best way to redefine it to work with everything?

[maetshju]

I have also just run into this behavior. For what it's worth, the framerate method works properly for me if you have called read on the VideoReader object first. By example:

x = openvideo("vid.avi");
VideoIO.framerate(x) # gives 1//0
read(x);
VideoIO.framerate(x) # gives correct framerate

This is using VideoIO v1.0.3 on Julia v1.7.3 on Windows 11.