docs: add QSV on FreeBSD

libva and libdrm are pulled as dependencies of intel-media-sdk.

source/docs/en/latest/developer/build-bsd.markdown

@@ -30,7 +30,7 @@ Clone the HandBrake repository.
 
     git clone https://github.com/HandBrake/HandBrake.git && cd HandBrake
 
-Build HandBrake. To build the command line interface only, disable the graphical interface by appending `--disable-gtk`.
+Build HandBrake. To enable experimental support for Intel Quick Sync Video, append `--enable-qsv`. To build the command line interface only, disable the graphical interface by appending `--disable-gtk`.
 
     ./configure --launch-jobs=$(sysctl -n hw.ncpu) --launch
 

source/docs/en/latest/developer/install-dependencies-freebsd.markdown

@@ -61,6 +61,10 @@ Dependencies:
 - python
 - speex
 
+Intel Quick Sync Video dependencies (optional):
+
+- intel-media-sdk
+
 Graphical interface dependencies:
 
 - atk
@@ -94,6 +98,10 @@ Build and install the `lame` source port.
     sudo make install || sudo make reinstall
     cd "$LASTDIR"
 
+To build with Intel Quick Sync Video support, install the QSV dependencies.
+
+    sudo pkg install intel-media-sdk
+
 To build the GTK [GUI](abbr:Graphical User Interface), install the graphical interface dependencies.
 
     sudo pkg install atk cairo dbus dbus-glib desktop-file-utils gdk-pixbuf2 gettext glib gnome3 gstreamer1-plugins-gdkpixbuf gtk3 intltool libdvdcss libnotify libvpx pango

source/docs/en/latest/technical/video-qsv.markdown

@@ -21,6 +21,7 @@ Intel QuickSync Video
 - Intel Skylake (6th Generation Core) CPU or later with Intel HD Graphics or better
 - Windows 10
 - Linux
+- FreeBSD
 
 Please note, these are not hard limits. Hardware encoding via Intel QSV *might* work on older series GPUs and older operating systems, but this is not officially supported.