+A faster method of creating the proxy file outiside of \CGG{} for users who have
+vaapi hardware acceleration capability on their graphics board is via a script. Speed
+up could potentially be 10 to 30 times faster depending on the parameter values you choose
+and the size of your video file. This script is included in the doc subdirectory as
+vaapi\_proxy.sh for users not using an AppImage version and is shown below. You will
+have to tune it to your specific needs for the vaapi\_device name (currently set to
+/dev/dri/renderr128), file type (currently set to h264 and mp4), and proxy size (now is 6).
+Once you have created the proxy file, you then start Cinelerra, load the original un-proxied
+video, use the Settings pulldown and choose the Proxy settings options as you would normally,
+but because you already have created the existing proxy file with the correct name, it will
+be automatically loaded and will not have to create it. The filename of the proxy file
+must be in the same location as the original video and have the exact required naming
+conventions and scale factor.
+
+\begin{lstlisting}[numbers=none]
+#!/bin/bash
+filename="$1"
+fileout="${filename%.*}"
+proxy="6"
+# Hardware encode AMD
+ffmpeg -threads 2 -hwaccel vaapi -vaapi_device /dev/dri/renderD128 \
+ -i "$1" -c:v h264_vaapi -vf "format=nv12,hwupload,scale_vaapi=iw/'$proxy':ih/'$proxy'" \
+ -vcodec h264_vaapi -preset fast -c:a copy \
+ -bf 0 -profile:v 66 "$fileout".proxy"$proxy"-mp4.mp4
+\end{lstlisting}
+
+\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 (FFMPEG 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 (FFMPEG 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 (FFMPEG 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 (FFMPEG 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 (FFMPEG only) = unchecked
+ File Format: FFMPEG | mkv
+ Video Preset-->
+ Compression: user_ffvhuff.mkv
+ Bitrate: 0
+ Quality: -1
+ Pixels: yuva4--p
+ yuva4--p--le
+\end{lstlisting}
+