\begin{lstlisting}[numbers=none]
Proxy #1
Scale factor: 1/4
- Rescaled to project size (FFMEG only) = unchecked
+ Rescaled to project size (FFMPEG only) = unchecked
File Format: FFMPEG | qt
Video Preset-->
Compression: png.qt
Proxy #2
Scale factor: 1/4
- Rescaled to project size (FFMEG only) = unchecked
+ Rescaled to project size (FFMPEG only) = unchecked
File Format: FFMPEG | qt
Video Preset-->
Compression: magicyuv.qt
Proxy #3
Scale factor: 1/4
- Rescaled to project size (FFMEG only) = unchecked
+ Rescaled to project size (FFMPEG only) = unchecked
File Format: FFMPEG | qt
Video Preset-->
Compression: openjpeg.qt
Proxy #4
Scale factor: 1/4
- Rescaled to project size (FFMEG only) = unchecked
+ Rescaled to project size (FFMPEG only) = unchecked
File Format: FFMPEG | pro
Video Preset-->
Compression: prores_4444.pro
Proxy #5
Scale factor: 1/4
- Rescaled to project size (FFMEG only) = unchecked
+ Rescaled to project size (FFMPEG only) = unchecked
File Format: FFMPEG | mkv
Video Preset-->
Compression: user_ffvhuff.mkv
\index{multi-camera}
\index{mixers}
-Use the Mixer Viewer to see multiple media playing simultaneously in re-sizable mini-viewers. This can be used in various ways and is useful to edit videos shot by multiple cameras from different viewpoints that were simultaneously recorded in order to create a single good video. Everything will have to be initially synced so you can decide which one of the camera angles is best suited at any time.
+Use the Mixer Viewer to see multiple media playing simultaneously in re-sizable mini-viewers. This can be used in various ways and is useful to edit videos shot by multiple cameras from different viewpoints that were simultaneously recorded in order to create a single good video. Everything will have to be initially synced so you can decide which one of the camera angles is best suited at any time. Mixer mode does not support audio only tracks but there is a workaround described at \nameref{cha:faq_problems_workarounds}.
The number of cameras/mixers you can have is generally limited to the available resources on your computer. Currently, the number of File Descriptors available in the OS limits cameras to about 50. If you have many \textit{mixer viewers} you will probably want to use proxy mode whenever possible. Also, in the \texttt{Settings $\rightarrow$ Playback A} tab \textit{Video Out} section, uncheck \textit{play every frame} and choosing a Video Driver of \textit{X11} with \textit{use direct X11 render if possible} checked, will provide better performance.