-\subsection{Drag Handle Management / Trimming}%
-\label{sub:drag_handle_management_trimming}
-
-With some edits on the timeline it is possible to do trimming. By
-trimming you shrink or grow the edit boundaries by dragging them. In
-drag and drop mode or cut and paste mode, move the cursor over an
-edit boundary until it changes shape. The drag handle shows as a
-left or right facing fat arrow when you cursor near the clip start
-or end. If the cursor faces left, the dragging operation affects
-the beginning of the edit. If the cursor faces right, the dragging
-operation affects the end of the edit.
-
-The effect of each drag operation not only depends on the behavior
-button but whether the beginning or end of the edit is being
-dragged. When you release the mouse button, the trimming operation
-is performed.
-
-For all file formats, other than still images, the extent of the
-trimming operation is limited to the source file length. Attempting
-to drag the start of the edit beyond the start of the source, limits
-it to the source start. In all trimming operations, all edits which
-start on the same position as the cursor when the drag operation
-begins are affected. You have to disarm tracks in order to prevent
-edits from being affected.
-
-You have 6 different choices of which mouse button to use for
-specific types of editing while using the drag handle. You change
-the drag handle mouse effects by using the \texttt{Settings
- $\rightarrow$ Preferences $\rightarrow$ Interface} tab and
-modifying the Editing section as shown in the next
-figure~\ref{fig:trim}. The drag handle affects not only the clip you
-are working on but also frequently the entire duration of all clips
-on the timeline.
-
-\begin{figure}[htpb]
- \centering
- \includegraphics[width=0.6\linewidth]{trim.png}
- \caption{Default choices for mouse: Ripple for button 1; Roll
- for button 2; Slip for button 3}
- \label{fig:trim}
-\end{figure}
-
-A description of the fundamental/common terminology for choices
-follows.
-
-\begin{description}
-\item[All Edits (ripple)] shorten or lengthen the start or end
- of a single piece of media while moving all media to the right of
- that clip up or down on the timeline correspondingly. Timeline
- duration is modified. In a drag \textit{All Edits} operation, the
- beginning of the edit either cuts data from the edit if you move it
- forward or pastes new data from before the edit if you move it
- backward. The end of the edit pastes data into the edit if you move
- it forward or cuts data from the end of the edit if you move it
- backward. All the following edits shift. If you drag the end of the
- edit past the start of the edit, the edit is deleted.
-\item[One Edit (roll)] move the in and out point of a single
- clip without changing the timeline duration. In a drag \textit{One
- Edit} operation, nothing is cut or pasted. If you move the beginning
- or end of the edit forward, the source reference in the edit shifts
- forward. If you move the beginning or end of the edit backward, the
- source reference shifts backward. The edit remains in the same spot
- in the timeline but the source shifts.
-\item[Src Only (slip)] move the in and out point of a single
- clip without changing the timeline duration. In a drag \textit{Src
- Only} operation, nothing is cut or pasted. If you move the beginning
- or end of the edit forward, the source reference in the edit shifts
- forward. If you move the beginning or end of the edit backward, the
- source reference shifts backward. The edit remains in the same spot
- in the timeline but the source shifts.
-\item[Slide] a single clip is moved but retains its current in
- and out point; however the out point of the clip to the left changes
- and the in point of the clip to the right also changes. Timeline
- duration remains the same.
-\item[Edge Left/Right] moves the edge of the clips.
-\item[No effect] no changes are made. You might want to use
- this choice to prevent accidental movements.
-\end{description}
-
-The next table displays the options and results
-with the Key Table here first.
-
-\begin{lstlisting}[style=sh]
- s = src media start
- p = proj position
- l = length
- c = cut distance
- rest == p+=c: for rest of clips
- 01 = flags edits_moved, rest_moved
-\end{lstlisting}
-
-\renewcommand{\arraystretch}{1.15}
-\begin{table}[ht]
- %\caption{}
- %\label{tab:}
- % Tell table to adjust font to fix on the page using \resize
- \resizebox{\textwidth}{!}{%
- \begin{tabular}{lllll}
- \toprule
- & & \textbf{Drag Left} & \textbf{Drag Right} &\\
- \midrule
- \multicolumn{2}{l}{\textit{curr s += c, l -= c; + rest}} & $\leftarrow$ & $\rightarrow$ & \textit{rest}\\
- abc12345xyz & \textbf{Ripple} left edge 11 $\rightarrow$ & abc012345xyz & abc2345xyz &\\
- \midrule
- \multicolumn{2}{l}{\textit{curr l += c; + rest}} & $\leftarrow$ & $\rightarrow$ & \textit{rest}\\
- abc12345xyz & \textbf{Ripple} right edge 01 $\rightarrow$ & abc1234xyz & abc123456xyz &\\
- \midrule
- \multicolumn{2}{l}{\textit{prev l += c; curr ps+= c, l -= c}} & $\leftarrow$ & $\rightarrow$ &\\
- abc12345xyz & \textbf{Roll} left edge 00 $\rightarrow$ & ab012345xyz & abcd2345xyz &\\
- \midrule
- \multicolumn{2}{l}{\textit{curr l += c; next ps+= c, l -= c}} & $\leftarrow$ & $\rightarrow$ &\\
- abc12345xyz & \textbf{Roll} right edge 00 $\rightarrow$ & abc1234wxyz & abc123456yz &\\
- \midrule
- \multicolumn{2}{l}{\textit{s -= c}} & $\leftarrow$ & $\rightarrow$ &\\
- abc12345xyz & \textbf{Slip} left edge 10 $\rightarrow$ & abc23456xyz & abc01234xyz &\\
- \midrule
- \multicolumn{2}{l}{\textit{s -= c}} & $\leftarrow$ & $\rightarrow$ &\\
- abc12345xyz & \textbf{Slip} right edge 10 $\rightarrow$ & abc23456xyz & abc01234xyz &\\
- \midrule
- \multicolumn{2}{l}{\textit{prev l += c; curr p+= c; next ps += c, l -= c}} & $\leftarrow$ & $\rightarrow$ &\\
- abc12345xyz & \textbf{Slide} left edge 10 $\rightarrow$ & ab012345wxyz & abcd12345yz &\\
- \midrule
- \multicolumn{2}{l}{\textit{prev l += c; curr p+= c; next ps += c, l -= c}} & $\leftarrow$ & $\rightarrow$ &\\
- abc12345xyz & \textbf{Slide} right edge 10 $\rightarrow$ & ab12345wxyz & abcd12345yz &\\
- \midrule
- \multicolumn{2}{l}{\textit{curr s -+= c, l += c; + rest}} & $\leftarrow$ & $\rightarrow$ & \textit{rest}\\
- abc12345xyz & \textbf{Edge} left edge 11 $\rightarrow$ & abc2345xyz & abc0123456xyz &\\
- \midrule
- \multicolumn{2}{l}{\textit{curr l -+= c; + rest}} & $\leftarrow$ & $\rightarrow$ & \textit{rest}\\
- abc12345xyz & \textbf{Edge} right edge 01 $\rightarrow$ & abc1234xyz & abc123456xyz &\\
- \bottomrule
- \end{tabular}
- }
-\end{table}
-\renewcommand{\arraystretch}{1}
-
-Next, a more immediate and colorful view shows these trimming
-options (figure~\ref{fig:trim-color}).
-
-\begin{figure}[htpb]
- \centering
- \includegraphics[width=0.8\linewidth]{trim-color.png}
- \caption{The 5 types of Trim: note the different lengths of the results.}
- \label{fig:trim-color}
-\end{figure}
-
-\paragraph{How to do a J-cut or L-cut} A J-cut is a split edit film
-editing technique in which the audio from a following scene overlaps
-the picture from the preceding scene, so that the audio portion of
-the later scene starts playing before its picture as a lead-in to
-the visual cut. An L-cut is a different split edit film editing
-technique in which the audio from preceding scene overlaps the
-picture from the following scene, so that the audio cuts after the
-picture, and continues playing over the beginning of the next scene
-(figure~\ref{fig:j-cut}). To do either a J-cut or an L-cut, you
-first shorten the first or second video a little. Then you block
-the audio tracks from changing by disarming the appropriate tracks.
-Finally use \textit{One Edit (roll)} the cutting edge off the
-videos. Moving to the right creates a J-cut and moving to the left
-creates an L-cut.
-
-\begin{figure}[htpb]
- \centering
- \includegraphics[width=0.8\linewidth]{j-cut.png}
- \caption{J-cut to left and L-cut to right}
- \label{fig:j-cut}
-\end{figure}
-
-
-\subsection{Split View in Compositor Using the Drag Handle with Trim}%
-\label{sub:split_view_compositor_using_drag_trim}
-
-The Trim Feature using the drag handle provides some good ways to
-view your video while editing. The playback position in the
-compositor is updated live and the view in the compositor can be
-split so that in the left half of the compositor you can see the
-last frame of the left clip and in the right half the first frame of
-the right clip. Dragging edits can not be extended past the
-beginning or the end.
-
-First familiarize yourself with button operation; check your setup
-by executing the following step. In the \texttt{Settings
- $\rightarrow$ Preferences $\rightarrow$ Interface} tab, Editing
-section, clicking on the edit boundaries can be set for Button 1, 2,
-3 as one of the following:
-
-\textit{Ripple}; \textit{Roll}; \textit{Slip}; \textit{Slide};
-\textit{Edge} or \textit{No effect}
-
-Now to use this feature, create a track with edits that have trims
-on the left and/or the right. The edit boundary can be modified
-using \textit{drag handles} at the boundary between the edits
-(figure~\ref{fig:trim-display}).
-
-\begin{figure}[htpb]
- \centering
- \includegraphics[width=1\linewidth]{trim-display.png}
- \caption{Split compositor screen showing the result of the Trim feature}
- \label{fig:trim-display}
-\end{figure}
-
-\begin{description}
-\item[Left Mouse Button (LMB) usage:] If you grab the edit
- handle from the right side, you will see a left arrow and dragging
- the boundary will modify the right edit playback starting time. If
- you grab the edit handle from the left side, you will see a right
- arrow and dragging the boundary will modify the left edit playback
- ending time. In both cases, the composer will show the edit endpoint
- of the changed edit.
-\item[Shift LMB usage:] The effect on the edits is the same as
- described above, but the composer will show a split screen of the
- left and right edits as they appear at the drag handle
- boundary. Dragging will only change one of the two images, since
- only one edit is being changed.
-\item[Middle Mouse Button (MMB) usage:] Both the left and the
- right edit ending/starting times are updated. The image shown in
- the compositor will be drawn from the side of the drag grab, that is
- the left if it is grabbed from the left, and the right if it is
- grabbed from the right.
-\item[Shift MMB usage:] The effect on the edits is the same as
- described above, but the composer will show a split screen of the
- left and right edits as they appear at the drag handle boundary.
- Dragging will change both of the two images, since both edits are
- being changed.
-\item[Right Mouse Button (RMB) usage:] The start/end point of
- the current edit is moved, but the edit length is unchanged only one
- image changes since only one edit endpoint is view is updated.
-\item[Shift RMB usage:] The effect on the edits is the same as
- described above, but the composer will show a split screen of the
- left and right edits as they appear at the drag handle boundary.
- Dragging will only change one of the two images, since only one edit
- is being changed.
-\end{description}
-
-
-\subsection{Snapping while Cutting and Dragging}%
-\label{sub:snapping_cutting_dragging}
-
-\paragraph{Cutting/Snapping edits} cuts from an edit handle to the
-insert point. There are Edit Panel buttons which normally are used
-to move to the previous or next edit handle/label.
-
-\begin{wrapfigure}[3]{r}{0.2\linewidth}
- \vspace{-2ex}
- \centering
- \includegraphics[width=0.7\linewidth]{snap.png}
-\end{wrapfigure}
-
-They look like tags and the letter E on the menu bar and are
-oriented forward/backward. These same buttons can be used to
-\textit{cut} from the insert pointer to the previous or next
-edit/label when the ctrl+alt keys are both pressed when the buttons
-are used. They \textit{snap} off the media instead of doing the
-standard re-positioning. This is useful to minimize the number of
-operations necessary to cut between edits/labels.
-
-Instead of using the edit panel buttons, you can more easily use the
-following keyboard shortcuts to perform the same functions: