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 or NULL if general log.
@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.
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 or NULL if general log. @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.