Resolution query

[=CrAzYG33K=]

Is the resolution 220*164 a good resolution??
FPS == 25
I know I'm being a n00b, but which do you guyz consider to be the optimum (best) resolution quality??

[Baldrick]

a good resolution for what? a portable/handheld device?
what video codec?

[=CrAzYG33K=]

for viewing a video file.. (AVI)
I dunno the codec.. can't be DivX certainly..

[jagabo]

I think 7680 × 4320 is about the best resolution to date for video:

http://en.wikipedia.org/wiki/Ultra_High_Definition_Video

You might need some special equipment though.

[waheed]

Use GSpot to identity the video properties. What equipment do you want to view the video on. A TV, PC, mobile, handheld device etc...

[mats.hogberg]

No matter what, 220*164 is no "standard" video resolution. Good possibly for some hand held device.

/Mats

[=CrAzYG33K=]

Yeah I figured it out..
sorry for the trouble guyz...
It turned out to be *crap* quality to watch on the comp.. Thx for your insight though..
MODS can lock this one now!

[jagabo]

Frame size is usually a matter of compromise. Generally, the bigger the frame the better the picture. But the bigger the file size too. In addition, you have other parameters to consider:

There's no point in using a really big frame if your source is very low resolution. You'll just get a big fuzzy picture.

When using lossy compression techniques like MPEG or Divx, it takes higher bitrates to encode higher resolution data. You usually need to find a balance between frame size and bitrate. This can vary with the source. A dark, low detail, low motion source will compress much better than a bright, high detail, high motion source. The former may look fine at 720x480, 30 fps, with 2000 kbps. The latter won't.

Playback devices have limitations. DVD players are limited 720x480 (NTSC, 720x576 PAL) at the highe end. So you can't use 1280x720. Even at 720x480 there are limits to the bitrate you can use. The iPod has a 320x240 display. There's no point in encoding at 1280x720, the iPod can't play that size. Even if it could play the file, the high resolution is huge waste of space for the small display.

[garryheather]

Indeed - and if you re-encode your video to the native resolution of a handheld you have other benefits:

1.The picture quality is often better (scaling on the fly can be a sod !).
2. Reduced bitrate = less disk access = longer battery life
3. less bitrate = more content on the disc !

I have an Archos AV400 and find most films play well at about 250Mb using DivX and a moderate, fixed bitrate MP3 for the audio (about 128kbps). For fast action stuff, I add about 50Mb to the allowed file size. For animated movies, deduct the same. I set my resolution width to be 320 pixels (native for my AV400) and on a display that size, it looks pretty good to me on those long flights or stays in departure halls.