From: Good Guy <good1.2guy@gmail.com>
Date: Fri, 4 Nov 2022 20:16:17 +0000 (-0600)
Subject: information on script for proxy creation speedup
X-Git-Tag: 2022-11~7
X-Git-Url: https://git.cinelerra-gg.org/git/?p=goodguy%2Fcin-manual-latex.git;a=commitdiff_plain;h=b4dd00c37774b828f439c574eeab99e5aee2de68

information on script for proxy creation speedup
---

diff --git a/parts/Advanced.tex b/parts/Advanced.tex
index 5a0678e..3bbc702 100644
--- a/parts/Advanced.tex
+++ b/parts/Advanced.tex
@@ -64,7 +64,7 @@ Quality:	-1
 Pixels:		yuv420p
 \end{lstlisting}
 
-If you get errors for some videos, such as those with strange variable bit rate or some types of files made on a smartphone, an usually reliable alternative is to change the following parameters:
+If you get errors for some videos, such as those with strange variable bit rate or some types of files made on a smartphone, a usually reliable alternative is to change the following parameters:
 
 \begin{lstlisting}[numbers=none]
 File Format:	FFMPEG - mov
@@ -80,6 +80,26 @@ 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.
 
+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).
+
+\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}