enum Compliance {
        ComplianceExperimental = -2,    ///< Allow nonstandardized experimental things.
        ComplianceUnofficial,       ///< Allow unofficial extensions
        ComplianceNormal,
        ComplianceStrict,           ///< Strictly conform to all the things in the spec no matter what consequences.
        ComplianceVeryStrict            ///< Strictly conform to an older more strict version of the spec or reference software.
    };

    // Constructor
    QAVOutputFormat(AVOutputFormat *outputFormat=NULL);

    bool queryCodec(int id, Compliance compliance=ComplianceNormal) const;
    bool queryCodec(const QAVCodec &codec, Compliance compliance=ComplianceNormal) const;