Function rsmpeg::ffi::av_probe_input_format2

pub unsafe extern "C" fn av_probe_input_format2(
    pd: *mut AVProbeData, 
    is_opened: i32, 
    score_max: *mut i32
) -> *mut AVInputFormat

Guess the file format.

@param pd data to be probed @param is_opened Whether the file is already opened; determines whether demuxers with or without AVFMT_NOFILE are probed. @param score_max A probe score larger that this is required to accept a detection, the variable is set to the actual detection score afterwards. If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended to retry with a larger probe buffer.