Sorry, but the question is simply misconceived. Bitrate of the video component (i.e. non-audio) is the product of three factors:

(1) frames per second

(2) pixels per frame (a.k.a. resolution)

(3) inverse of the conversion factor of bits to pixels (i.e. bits per pixel instead of pixels per bit).


File conversion will alter all of these factors, but the first and third factors can only be adjusted to a limited extent.

Factor (1): For a mobile device, you can reduce the fps from its usual 25 to about 18. Anything less will make the video look jerky.

Factor (3): Some file formats are a little more efficient than others, but you are not going to make much of a gain in practical terms. File compression can give you more pixels per MB, but then your processor will have the extra work of decompression when playing the video. This slows all processes down and takes you back where you started or worse.

Resolution is the one factor where you really have a chance to make a difference. Reduce it from 1280x960 to 320x240, and you can reduce the bitrate to 1/16 of what it was before. According to the wiki, 400x240 is ideal for N8x0 tablets. (320x240 amounts to the same thing if the original video is not in wide-screen format.) On such a small screen, you are simply not going to see any improvement from a higher resolution.

In addition to the file conversion utilities previously mentioned in this thread, I would recommend Format Factory, particularly for non-Linux users. Among the many options for the output file format, there are 14 intended specifically for playing video on Nokia devices (in the "All to Mobile Device" menu).

I would also add that audio bitrates are often unnecessarily high. When we have to use dial-up internet, my wife and I sometimes listen to opera on a Russian internet radio station at 24 kbps. However slow the connection, we can always get that one. It sounds like a vinyl recording without the scratches and pops (and in fact much of the station's material comes from vinyl LP's). There is nothing wrong with it, although 32 kbps is better and 64 kbps is better still. Beyond that, you are into the realm of fads and fanaticism, not music. If you are listening through loudspeakers, the speakers don't have the audio resolution to show any difference beyond 64 kbps.