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 av_vlog callback
function.
@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, lower values signifying
higher importance.
@param fmt The format string (printf-compatible) that specifies how
subsequent arguments are converted to output.
@see av_vlog
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 av_vlog callback function.
@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, lower values signifying higher importance. @param fmt The format string (printf-compatible) that specifies how subsequent arguments are converted to output. @see av_vlog