case AVERROR_PROTOCOL_NOT_FOUND:errstr = "Protocol not found" ; break;
case AVERROR_STREAM_NOT_FOUND: errstr = "Stream not found" ; break;
case AVERROR_BUG: errstr = "Bug detected, please report the issue" ; break;
+ case AVERROR_UNKNOWN: errstr = "Unknown error occurred" ; break;
}
if (errstr) {