I once again tried to create a movie file to play on my tablet but again I can't seem to get a file that will play ok on it.

I get a file that plays so choppy and slow that it's unwatchable (pretty much the same issues that I have with video podcasts that are downloaded).

This particular video was a file of size 1280 x 544

I wanted to convert it to 576 x 352

a) I set the width x height to 828 x 352
b) I set the crop to 126 pixels off both sides.

Anamorphic: None
Deinterlace: Slow
File-format: MP4
Video Codec: MPEG-4
FPS: Same as source
2-Pass encoding
Avg bitrate: 750

What did I do wrong here that can explain the choppiness of the video when played on my N810?

(I'm using Handbrake).