X-Git-Url: https://git.cinelerra-gg.org/git/?p=goodguy%2Fcin-manual-latex.git;a=blobdiff_plain;f=parts%2FAdvanced.tex;h=9734abf0893de627ae1dcf72c2a0e55d2887c1d0;hp=87eecea8c0c040165d4981d23a7819b821dc047b;hb=cf3424bfc8cee2a0838826badb7d4727d145bd75;hpb=af000e989e1b806fd27864622011a9401ad9d90b

diff --git a/parts/Advanced.tex b/parts/Advanced.tex
index 87eecea..9734abf 100644
--- a/parts/Advanced.tex
+++ b/parts/Advanced.tex
@@ -7,7 +7,7 @@
 
 Proxies was introduced to allow for a smoother timeline experience. Full HD and everything from 4K size up are usually very large in file size. In addition, some commonly used codecs (e.g. h264/5) are very compressed and interframe type, so they are more stressful for timeline playback. These files cause performance problems on weaker PCs. As a solution the developers have introduced proxies to reduce the file size. Reduced means to minimize the resolution/dimension, as usually not the full resolution is needed, because the compositor usually takes only a fraction of the computer screen. Therefore the scaling factor, which indicates how much the original resolution should be reduced. 
 There is also the \textit{proxy 1:1} \index{proxy!1:1} that maintains the original resolution but still allows you to act on the codec (lowering the bit rate, for example). See also next section: \ref{sec:transcode}.
-When rendering, the original setting will be used to avoid loss of image quality.  
+When we want to render the project, remember to remove the proxy to return to the original settings with the highest quality.  
 
 To use the proxy in a classic way, i.e. as a scaling, select \texttt{Settings $\rightarrow$ Proxy settings} and change the Scale factor from Original size to your downsized choice.  You can choose ffmpeg as the File Format \index{file format} and a choice of various codecs associated with that.  A good choice is the default of mpeg which can usually be quite fast.  In addition, to modify values for that codec, click on the wrench icon.
 
@@ -80,6 +80,69 @@ If you get error messages \index{proxy!error} when creating proxies, check the V
 
 More specific information on which plugins need to use \textit{Proxy 1:1}. is provided here next. If the keyframe data uses coordinate data that is absolute, then the Factor scale = 1 should be used.  If the data is normalized (like always $0-100\%$) then the proxy can be done with downsize (i.e. classic \textit{Proxy}).  The session geometry format, shown in \texttt{Settings $\rightarrow$ Format} as $width \times height$, is changed if scale factor $\neq$ 1 is used to cause all of the data to be in the reduced format.  If this affects the plugin operation, then \textit{Proxy 1:1} should be used.  Examples of plugins that need the \textit{Proxy 1:1} are: Title, AutoScale, Scale, ScaleRatio, and Translate.  Most others are safe to use with downsize.
 
+\subsection{Proxies with Alpha channel}%
+\label{sub:proxies_alpha_channel}
+
+Next are some examples of tested and working configurations that maintain the alpha channel:
+
+\begin{lstlisting}[numbers=none]
+Proxy #1
+	Scale factor: 1/4
+	Rescaled to project size (FFMEG only) = unchecked
+	File Format: FFMPEG | qt
+	Video Preset-->
+		Compression: png.qt
+		Bitrate: 0
+		Quality: -1
+		Pixels: rgba (or rgba64be)
+	
+	
+Proxy #2
+	Scale factor: 1/4
+	Rescaled to project size (FFMEG only) = unchecked
+	File Format: FFMPEG | qt
+	Video Preset-->
+		Compression: magicyuv.qt
+		Bitrate: 0
+		Quality: -1
+		Pixels: yuva444p
+	
+	
+Proxy #3
+	Scale factor: 1/4
+	Rescaled to project size (FFMEG only) = unchecked
+	File Format: FFMPEG | qt
+	Video Preset-->
+		Compression: openjpeg.qt
+		Bitrate: 0
+		Quality: -1
+		Pixels: yuva420p
+	
+	
+Proxy #4
+	Scale factor: 1/4
+	Rescaled to project size (FFMEG only) = unchecked
+	File Format: FFMPEG | pro
+	Video Preset-->
+		Compression: prores_4444.pro
+		prores_4444xq.pro
+		Bitrate: 0
+		Quality: -1
+		Pixels: yuva444p10le
+	
+	
+Proxy #5
+	Scale factor: 1/4
+	Rescaled to project size (FFMEG only) = unchecked
+	File Format: FFMPEG | mkv
+	Video Preset-->
+		Compression: user_ffvhuff.mkv
+		Bitrate: 0
+		Quality: -1
+		Pixels: yuva4--p
+				   yuva4--p--le
+\end{lstlisting}
+
 \section{Transcode}%
 \label{sec:transcode}
 \index{transcode}