Function rsmpeg::ffi::av_vlog

pub unsafe extern "C" fn av_vlog(
    avcl: *mut c_void, 
    level: i32, 
    fmt: *const i8, 
    vl: *mut __va_list_tag
)

Send the specified message to the log if the level is less than or equal to the current av_log_level. By default, all logging messages are sent to stderr. This behavior can be altered by setting a different logging callback function. @see av_log_set_callback

@param avcl A pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct. @param level The importance level of the message expressed using a @ref lavu_log_constants “Logging Constant”. @param fmt The format string (printf-compatible) that specifies how subsequent arguments are converted to output. @param vl The arguments referenced by the format string.