[FFmpeg-devel] [PATCH] avfilter/vf_fps: extend support for expressions

[James Almer]

On 6/19/2021 4:56 PM, Gyan Doshi wrote:
> 
> 
> On 2021-06-05 21:22, James Almer wrote:
>> +static const double ntsc_fps = 30000.0 / 1001.0;
>> +static const double pal_fps = 25.0;
>> +static const double qntsc_fps = 30000.0 / 1001.0;
>> +static const double qpal_fps = 25.0;
>> +static const double sntsc_fps = 30000.0 / 1001.0;
>> +static const double spal_fps = 25.0;
>> +static const double film_fps = 24.0;
>> +static const double ntsc_film_fps = 24000.0 / 1001.0;
> 
> Sorry, I missed this before you applied it but what's the q- and s- 
> prefixed standards with identical rates?
> I can't find any specs or docs online.

It's taken from video_rate_abbrs in libavutil/parseutils.c
The description is "VCD compliant" for q and "square pixel" for s.