feat(linux): wave5: Add FFMPEG Encode commands

Wave5 driver has been updated to make it operable with FFMPEG. Update
documentation with relevant commands to expose this feature to customers.

Signed-off-by: Brandon Brnich <[email protected]>

Author: b-brnich

source/linux/Foundational_Components_Multimedia_wave5.rst

@@ -638,6 +638,33 @@ To pipe the output from ffmpeg to ffplay with hardware acceleration, the followi
 
    ffmpeg -re -codec:v hevc_v4l2m2m -i input.h265 -fps_mode passthrough -f rawvideo - | ffplay -framerate 30 -video_size 1920x1080 -f rawvideo -autoexit -
 
+FFMPEG also has support to use V4L2 HW accelerators for video encoding. The below command is an example for encoding a raw video utilizing the Wave5 IP:
+
+.. code-block:: console
+
+   ffmpeg -f rawvideo -pix_fmt yuv420p -s:v 352x288 -r 30 -i <input-video>.yuv -c:v h264_v4l2m2m <output-video>.h264 -y -nostdin
+
+Below is the equivalent if H265 encoding is desired.
+
+.. code-block:: console
+
+   ffmpeg -f rawvideo -pix_fmt yuv420p -s:v 352x288 -r 30 -i <input-video>.yuv -c:v hevc_v4l2m2m city.h265 -y -nostdin
+
+352x288 above is just an example resolution. This value should be updated to properly reflect the resolution of the raw video. FFMPEG can also
+capture video using cameras attached to the device. Please see below for an example.
+
+.. code-block:: console
+
+   ffmpeg -f v4l2 -framerate 30 -video_size 1280x720 -i /dev/video3 -c:v h264_v4l2m2m <video-destination>
+
+Keep in mind that the Wave5 does have HW requirements for the raw video; please refer to :ref:`Introduction` for these constraints. If the video being
+captured is a resolution not aligned to the HW requirements, ffmpeg can be told to pad the video to make it compliant with HW. The following command
+accomplishes this.
+
+.. code-block:: console
+
+   ffmpeg -f rawvideo -pix_fmt yuv420p -s 1920x1080 -r 30 -i <1080p-input-video>.yuv -vf "pad=width=1920:height=1088:x=0:y=0:color=black" -c:v h264_v4l2m2m <output-video>.h264
+
 To print out the packet's data and payload data in hexadecimal from a given multimedia stream named :file:`foo.h265`, the following can be used:
 
 .. code-block:: console