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Dive media: Extract thumbnails from videos with ffmpeg
Extract thumbnails using ffmpeg. Behavior is controlled by three new preferences fields: - extract_video_thumbnails (bool): if true, thumbnails are calculated. - extract_video_thumbnail_position (int 0..100): position in video where thumbnail is fetched. - ffmpeg_executable (string): path of ffmpeg executable. If ffmpeg refuses to start, extract_video_thumbnails is set to false to avoid unnecessary churn. Video thumbnails are marked by an overlay. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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14 changed files with 727 additions and 20 deletions
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@ -435,14 +435,17 @@ private:
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class GeneralSettingsObjectWrapper : public QObject {
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Q_OBJECT
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Q_PROPERTY(QString default_filename READ defaultFilename WRITE setDefaultFilename NOTIFY defaultFilenameChanged)
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Q_PROPERTY(QString default_cylinder READ defaultCylinder WRITE setDefaultCylinder NOTIFY defaultCylinderChanged)
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Q_PROPERTY(short default_file_behavior READ defaultFileBehavior WRITE setDefaultFileBehavior NOTIFY defaultFileBehaviorChanged)
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Q_PROPERTY(bool use_default_file READ useDefaultFile WRITE setUseDefaultFile NOTIFY useDefaultFileChanged)
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Q_PROPERTY(int defaultsetpoint READ defaultSetPoint WRITE setDefaultSetPoint NOTIFY defaultSetPointChanged)
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Q_PROPERTY(int o2consumption READ o2Consumption WRITE setO2Consumption NOTIFY o2ConsumptionChanged)
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Q_PROPERTY(int pscr_ratio READ pscrRatio WRITE setPscrRatio NOTIFY pscrRatioChanged)
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Q_PROPERTY(bool auto_recalculate_thumbnails READ autoRecalculateThumbnails WRITE setAutoRecalculateThumbnails NOTIFY autoRecalculateThumbnailsChanged)
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Q_PROPERTY(QString default_filename READ defaultFilename WRITE setDefaultFilename NOTIFY defaultFilenameChanged)
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Q_PROPERTY(QString default_cylinder READ defaultCylinder WRITE setDefaultCylinder NOTIFY defaultCylinderChanged)
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Q_PROPERTY(short default_file_behavior READ defaultFileBehavior WRITE setDefaultFileBehavior NOTIFY defaultFileBehaviorChanged)
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Q_PROPERTY(bool use_default_file READ useDefaultFile WRITE setUseDefaultFile NOTIFY useDefaultFileChanged)
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Q_PROPERTY(int defaultsetpoint READ defaultSetPoint WRITE setDefaultSetPoint NOTIFY defaultSetPointChanged)
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Q_PROPERTY(int o2consumption READ o2Consumption WRITE setO2Consumption NOTIFY o2ConsumptionChanged)
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Q_PROPERTY(int pscr_ratio READ pscrRatio WRITE setPscrRatio NOTIFY pscrRatioChanged)
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Q_PROPERTY(bool auto_recalculate_thumbnails READ autoRecalculateThumbnails WRITE setAutoRecalculateThumbnails NOTIFY autoRecalculateThumbnailsChanged)
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Q_PROPERTY(bool extract_video_thumbnails READ extractVideoThumbnails WRITE setExtractVideoThumbnails NOTIFY extractVideoThumbnailsChanged)
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Q_PROPERTY(int extract_video_thumbnails_position READ extractVideoThumbnailsPosition WRITE setExtractVideoThumbnailsPosition NOTIFY extractVideoThumbnailsPositionChanged)
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Q_PROPERTY(QString ffmpeg_executable READ ffmpegExecutable WRITE setFfmpegExecutable NOTIFY ffmpegExecutableChanged)
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public:
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GeneralSettingsObjectWrapper(QObject *parent);
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@ -454,6 +457,9 @@ public:
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int o2Consumption() const;
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int pscrRatio() const;
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bool autoRecalculateThumbnails() const;
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bool extractVideoThumbnails() const;
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int extractVideoThumbnailsPosition() const;
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QString ffmpegExecutable() const;
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public slots:
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void setDefaultFilename (const QString& value);
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@ -464,6 +470,9 @@ public slots:
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void setO2Consumption (int value);
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void setPscrRatio (int value);
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void setAutoRecalculateThumbnails (bool value);
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void setExtractVideoThumbnails (bool value);
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void setExtractVideoThumbnailsPosition (int value);
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void setFfmpegExecutable (const QString &value);
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signals:
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void defaultFilenameChanged(const QString& value);
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@ -474,6 +483,9 @@ signals:
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void o2ConsumptionChanged(int value);
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void pscrRatioChanged(int value);
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void autoRecalculateThumbnailsChanged(int value);
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void extractVideoThumbnailsChanged(bool value);
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void extractVideoThumbnailsPositionChanged(int value);
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void ffmpegExecutableChanged(const QString &value);
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private:
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const QString group = QStringLiteral("GeneralSettings");
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};
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