Encode videos using Compressor 3.5.2 or later (an application included in Final Cut Studio 3):
Select the H.264 for iPod video and iPhone 640X480 setting found in the Apple Devices directory of the Compressor settings list.
In the settings inspector on the Encoder pane, select iPod/iPhone (VGA) for native 4X3 content or iPod/iPhone (Anamorphic) for 16X9 recorded in a full 4X3 raster (referred to as “anamorphic”).
When using the anamorphic encoder instructions, select the gear across from the Aspect Ratio scroll and select 16:9 (640X480). This creates a Pixel Aspect value that appears in the Geometry pane.
Use the Geometry pane to enter crop values to remove any black borders or inactive pixels.
Click the Preview button on the Compressor Batch window to verify the accuracy of the crop values and also to access the source and setting buttons to test the results of the aspect ratio setting.
Note: Video files can be delivered in HEVC (High Efficiency Video Coding) in an MPEG-4 container or in H.264 in an MPEG-4 container with the file extension .m4v (.mp4 is allowed, but less preferable).