\item [Replace current project and concatenate tracks: ] same as replace current project, except that if multiple files are selected, \CGG{} will concatenate the tracks of each file, inserting different source files in the same set of tracks, one after another, in alphanumeric order, starting at 0. New resources are created in the Resources Window, replacing the current ones. Files go across the timeline.
\end{description}
For ffmpeg and mpeg files, when the Insertion strategy methodology in the \texttt{File $\rightarrow$ Load files} pulldown is chosen to be either \textit{Replace current project} or \textit{Replace current project and concatenate tracks}, the basic session format parameters are reinitialized to match new media. This selects the default asset and determines its width, height, and video length, frame rate, calculates the colormodel, and assumes square pixels to make an intelligent guess about aspect ratio for video. For audio, the sample rate, audio length, and channel count (mono, stereo, or 5.1) are reinitialized. In addition the \textit{Track Size} will be computed and is reinitialized to match the new loaded media. When using \textit{replace} type insertion strategy, the new asset list is the only media in use so that this update saves the user from immediately needing to change the session format to match the only possibility.
\item [Replace current project and concatenate tracks: ] same as replace current project, except that if multiple files are selected, \CGG{} will concatenate the tracks of each file, inserting different source files in the same set of tracks, one after another, in alphanumeric order, starting at 0. New resources are created in the Resources Window, replacing the current ones. Files go across the timeline.
\end{description}
For ffmpeg and mpeg files, when the Insertion strategy methodology in the \texttt{File $\rightarrow$ Load files} pulldown is chosen to be either \textit{Replace current project} or \textit{Replace current project and concatenate tracks}, the basic session format parameters are reinitialized to match new media. This selects the default asset and determines its width, height, and video length, frame rate, calculates the colormodel, and assumes square pixels to make an intelligent guess about aspect ratio for video. For audio, the sample rate, audio length, and channel count (mono, stereo, or 5.1) are reinitialized. In addition the \textit{Track Size} will be computed and is reinitialized to match the new loaded media. When using \textit{replace} type insertion strategy, the new asset list is the only media in use so that this update saves the user from immediately needing to change the session format to match the only possibility.