Fill the provided buffer with a string containing an error string
corresponding to the AVERROR code errnum.
@param errbuf a buffer
@param errbuf_size size in bytes of errbuf
@param errnum error code to describe
@return the buffer in input, filled with the error description
@see av_strerror()
Fill the provided buffer with a string containing an error string corresponding to the AVERROR code errnum.
@param errbuf a buffer @param errbuf_size size in bytes of errbuf @param errnum error code to describe @return the buffer in input, filled with the error description @see av_strerror()