Put a description of the AVERROR code errnum in errbuf.
In case of failure the global variable errno is set to indicate the
error. Even in case of failure av_strerror() will print a generic
error message indicating the errnum provided to errbuf.
@param errnum error code to describe
@param errbuf buffer to which description is written
@param errbuf_size the size in bytes of errbuf
@return 0 on success, a negative value if a description for errnum
cannot be found
Put a description of the AVERROR code errnum in errbuf. In case of failure the global variable errno is set to indicate the error. Even in case of failure av_strerror() will print a generic error message indicating the errnum provided to errbuf.
@param errnum error code to describe @param errbuf buffer to which description is written @param errbuf_size the size in bytes of errbuf @return 0 on success, a negative value if a description for errnum cannot be found