Several ways exist to change \CGG{}’s operational characteristics. A lot of variations can be made to settings and preferences by using the \textit{Settings} pulldown from the main window and choosing \textit{Preferences}.
In addition, there are currently 2 settings that can only be manually changed in your \$Home/.bcast5/Cinelerra\_rc file and then done so by very careful editing. These include FAST\_SPEED and SLOW\_SPEED which allow you to modify the default 2X speed of \textit{Fast forwward} and the .5X speed of the \#2 keypad for \textit{Slow speed forward play}.
-For example, adding the 2 lines FAST\_SPEED 4 and SLOW\_SPEED .2 to the end of the Cinelerra\_rc wile will result in playing at 4 times faster and 20\% slower.
+For example, adding the 2 lines FAST\_SPEED 4 and SLOW\_SPEED .2 to the end of the Cinelerra\_rc wile will result in playing at 4X faster and 5X slower.
\section{Playback A / Playback B}%
\label{sec:playback_a_b}
\item[White balance CR2 images] this enables white balancing for CR2 images if interpolation is also enabled. This is because proper white balancing needs a blending of all 3 primary colors. White balance uses the camera's matrix which is contained in the CR2 file. Disabling white balancing is useful for operations involving dark frame subtraction. The dark frame and the long exposure need to have the same color matrix. If you disable Interpolate CR2 Images and use the Interpolate Pixels effect, be aware the Interpolate Pixels effect always does both interpolation and white balancing using the camera's matrix, regardless of the settings in Preferences. Dark frame subtraction needs to be performed before Interpolate Pixels.
\item[Video driver] \index{video!driver} normally video on the timeline goes to the compositor window during both continuous playback and when the insertion point is repositioned. Instead of sending video to the Compositor window, the video driver can be set to send video to another output device during continuous playback. However, this does not affect where video is routed when the insertion point is repositioned. Options are listed next.
\begin{description}
- \item[\textit{X11}] this was the first method of graphical display on Unix systems. It just writes the RGB triplet for each pixel directly to the window. It is useful when graphics hardware can not handle very large frames. And when X11 is usled with the associated checkbox enabled of \textit{use direct x11 render if possible} it can be a really good playback method to speed up playback for large frames.
+ \item[\textit{X11}] this was the first method of graphical display on Unix systems. It just writes the RGB triplet for each pixel directly to the window. It is useful when graphics hardware can not handle very large frames. And when X11 is used with the associated checkbox enabled of \textit{use direct x11 render if possible} it can be a really good playback method to speed up playback for large frames.
\item[\textit{X11-XV}] this was an enhancement to X11 in 1999. It converts YUV to RGB in hardware with scaling. In some cases it may be the preferred playback method, but it can not handle large frame sizes. Maximum video size for XV is usually $1920\times1080$.
\item[\textit{X11-OpenGL}] the most powerful video playback method is OpenGL. With this driver, most effects are done in hardware with the graphics board installed in the computer. OpenGL allows video sizes up to the maximum texture size, which is usually larger than what XV supports, depending on the graphics driver. OpenGL relies on PBuffers and shaders to do video rendering. Plugins or transitions that do not have \textit{handle OpenGL} in the code will use software instead of hardware and this will slow down playback.
OpenGL does not affect rendering. It just accelerates playback. X11-OpenGL processes everything in 8 bit color models, although the difference between YUV and RGB is retained. The scaling equation set in the preferences window is ignored by OpenGL -- it always uses linear scaling. Camera and projector operations use OpenGL, but some of the effects may not support OpenGL acceleration.
\paragraph{Highlighting Inversion color} \index{inverted colors} Modify the selection area color; default is \textit{ffffff} which is white. When you make a selection, that area becomes an inverse image which by default becomes a whitish color. You can set it to a different color by modifying the hex value in the box next to \textit{Highlight inversion color}. Keep in mind that if you set the value to a low value, you will not be able to see the outlined selected area (for example the hex value "f" is not readily visible and leads to confusion). A leading 0 or blank is not allowed and will be automatically changed to \textit{ffffff}.
\paragraph{Composer BG Color} \index{background color} You can choose the background color of the viewer window.
-\paragraph{YUV color space} \index{yuv color space} Default is \textit{BT601}; others \textit{BT709} (high definition), \textit{BT2020} (ultra high definition).
+\paragraph{YUV color space} \index{yuv color space} Default is \textit{BT601}; others \textit{BT709} (high definition), \textit{BT2020} (ultra high definition). PAL and NTSC have different color primaries, so $BT 601\_NTSC$ = SMPTE 170M = BT 601\_525 and $BT 601\_PAL$ = BT 470 BG = BT 601\_625. BT 2020 can be $BT 2020\_NCL$ (non-constant luminance) or $BT 2020\_CL$ (constant luminance). NCL is the standard.
\paragraph{YUV color range} \index{yuv color range} JPEG [$0-255$] and MPEG [$16-235$]
projects / goodguy / cin-manual-latex.git / blobdiff