QVideoEncoder.h

Go to the documentation of this file.

// Inspired from QTFFmpegWrapper (Daniel Roggen) and the 'muxing.c' example in
// FFmpeg doc/examples
#ifndef Q_VIDEO_ENCODE_HEADER
#define Q_VIDEO_ENCODE_HEADER
 
// Qt
#include <QImage>
 
// FFmpeg variables (we don't want to pollute the client project with FFmpeg
// includes!)
struct FFmpegStuffEnc;
 
class QVideoEncoder {
public:
 
    QVideoEncoder(QString filename,
                  int width,
                  int height,
                  unsigned bitrate,
                  int gop = 12,
                  int fps = 25);
 
    virtual ~QVideoEncoder();
 
 
    bool open(QString formatShortName, QStringList& errors);
 
    inline bool isOpen() const { return m_isOpen; }
 
    virtual bool encodeImage(const QImage& image,
                             int frameIndex,
                             QString* errorString = nullptr);
 
    virtual bool close();
 
    struct OutputFormat {
        QString shortName;
        QString longName;
        QString extensions;
    };
 
    static bool GetSupportedOutputFormats(std::vector<OutputFormat>& formats,
                                          bool ignoreIfNoFileExtension = true);
 
protected:
    // stream descriptor
    QString m_filename;
    int m_width;
    int m_height;
    unsigned m_bitrate;
    int m_gop;
    int m_fps;
    bool m_isOpen;
 
    FFmpegStuffEnc* m_ff;
 
    bool isSizeValid();
 
    // Alloc/free a frame
    bool initFrame();
    void freeFrame();
 
 
    bool convertImage_sws(const QImage& image, QString* errorString = nullptr);
};
 
#endif  // Q_VIDEO_ENCODE_HEADER