- \item When \texttt{Rescaled to project size (FFMPEG only)} is checked, the size of the video data to be computed will always be the same as the Project Format. The size of your video is scaled down to the Scale factor BUT then it is rescaled up to the Project Format. For example, your Project Format is 1920x1080 and Proxy's Scale factor is $\frac{1}{4}$, then your videos ($1920x1080$) will be scaled down to 480x270 and then up-scaled to $1920x1080$. All the Effects/Plugins work correctly because the original resolution/geometry/size is not changed. For an old computer, this option is not recommended.
- \item When \texttt{Rescaled to project size (FFMPEG only)} is UNchecked, the size of the video data to be computed will be reduced to the Scale factor. The size of your video is scaled down to the Scale factor. For example, your Project Format is 1920x1080 and Proxy's Scale factor is $\frac{1}{4}$, then your videos ($1920x1080$) will be scaled down to $480x270$. It works as if the Project Format were $480x270$ (and really it works). If you take a look at \texttt{Settings $\rightarrow$ Format...} when Proxy is enabled (Active), you can see that the Width and Height are changed according to the Scale factor; you absolutely must NOT change these values! The good thing is that your computer will be faster. The bad thing is that some Effects/Plugins do not work as expected because they use pixel units. Examples are \texttt{Title} and \texttt{Blur} plugins. A workaround is needed for that - you can see an example in the tutorial \url{https://www.youtube.com/watch?v=YCqJnHLmj6s} at 1m:56s where the Snapshot feature is used to "convert" the white line to a PNG. Or another workaround is to use Inkscape to create a title and export it to PNG that you load instead of using the \textit{Title} plugin.
+ \item When \textit{Rescaled to project size (FFMPEG only)} is checked, the size of the video data to be computed will always be the same as the Project Format. The size of your video is scaled down to the \textit{Scale factor} BUT then it is rescaled up to the Project Format. For example, your Project Format is 1920x1080 and Proxy's Scale factor is $\frac{1}{4}$, then your videos ($1920x1080$) will be scaled down to 480x270 and then up-scaled to $1920x1080$. All the Effects/Plugins work correctly because the original resolution/geometry/size is not changed. For an old computer, this option is not recommended.
+ \item When \textit{Rescaled to project size (FFMPEG only)} is UNchecked, the size of the video data to be computed will be reduced to the \textit{Scale factor}. The size of your video is scaled down to the \textit{Scale factor}. For example, your Project Format is 1920x1080 and Proxy's Scale factor is $\frac{1}{4}$, then your videos ($1920x1080$) will be scaled down to $480x270$. It works as if the Project Format were $480x270$ (and really it works). If you take a look at \texttt{Settings $\rightarrow$ Format...} when Proxy is enabled (Active), you can see that the Width and Height are changed according to the \textit{Scale factor}; you absolutely must NOT change these values! The good thing is that your computer will be faster. The bad thing is that some Effects/Plugins do not work as expected because they use pixel units. Examples are \textit{Title} and \textit{Blur} plugins. A workaround is needed for that, such as using Inkscape to create a title and export it to PNG that you load instead of using the \textit{Title} plugin.