[Libav-user] Error while setting fps filter value

[Przemysław Sobala]

Hello
I'm trying to add the fps video filter to my filter chain.
I set the 'fps' option using:

     av_opt_set_video_rate(fps_filter_ctx, "fps", (AVRational) {15,1}, 
AV_OPT_SEARCH_CHILDREN);

but after that I can see an error log entry:

     [fps] Value 15.000000 for parameter 'fps' out of range [0 - 0]

After using

     av_opt_set(fps_filter_ctx, "fps", "15", AV_OPT_SEARCH_CHILDREN);

everything works fine but I'm not in favour of AVRational -> char[] -> 
AVRational conversion
--
regards
Przemysław Sobala