1080i to 720rips.....file size per minute question.

[OrangeTTT]

Hi guys.

Using Divx and my propritrary Fusion encoding program, I'm able to create these files sizes[interlaced AVI's}

1280x720@4000kb/s+192mp3{fixed rate}=33mb/min
1280x720@6000kb/s+192mp3=47mb/min
1280x720@8000kb/s+192mp3=61mb/min

I'm curious about what people are achieving using other more modern combo's, ie, like Mkv and 264 etc.....so for example, using the best combo of codec and container, what could I get 1280x720@6000kb/s down to per minute?

[guns1inger]

Use a bitrate calculater.

Size = Bitrate x Running Time. It doesn't matter what the resolution is, or what codec you use. The rule always holds true. Size = Bitrate x Running Time.

If you take a 1080 mpeg-2 file @12 MB/s, and re-encode it using H.264 @ 12 MB/s you will get a file that is the same size as the source.

Any good bitrate calculator will do.

[OrangeTTT]

So if I make a2 minute file 1920x1080@4000kb/s, it will be the same size as 1280x720@4000kb/s....?

[guns1inger]

Yep. It's all abut the data, not the resolution.

[OrangeTTT]

Hard to believe but I'm making a 1920x1200@4000 now, so I'll post back with the results.

[OrangeTTT]

By jove you're right, granted it won't playback in WMP11....but works fine in VLC and I assume MPC.
As silly as this question is, would the 1920x1080 files be better on 40in LCD's compared to the 720's?
I have a 26in PC monitor, and I "think" the 1920 looks better than the 720 but it's hard to tell on such a small monitor......

[poisondeathray]

As a general rule, LCD's monitors/tv's display their best quality at their native resolution.

So if your model is a 720p native, then 720 would be the better resolution (assuming everything else is the same in regards to the source, and bitrate etc...)

[jagabo]

If you don't need your files to be a fixed size, forget bitrate and use constant quality encoding. You get exactly the quality you want, the file turns out whatever size is needed to maintain that level of quality. You don't have to fret about what bitrate is "right" for you video.

[jagabo]

As a general rule, LCD's monitors/tv's display their best quality at their native resolution.

So if your model is a 720p native, then 720 would be the better resolution (assuming everything else is the same in regards to the source, and bitrate etc...)

Actually, this isn't quite right. Most 720p HDTVs are not 1280x720. And even the ones that are usually enlarge the incoming frame to overscan it. So it's not obvious which will look better, a 1280x720 source or a 1920x1080 source. One would have to try both and see. Use resolution test patterns to see the biggest differences.

http://www.bealecorner.org/red/test-patterns/
http://feldoncentral.2150.com/HDNet/large/TestPattern_01.jpg

[poisondeathray]

Yup you're correct Jagabo. Most TV's that claim to be "Hi-Def" are upscaled from 1366 x 768 . You have to look at the "native resolution" in the fine print to be sure. But the ones that advertise "720p" or "1080p" are usually truly native 1280x720 and 1920x1080 - but you should always check at the specs. I agree the best advice is to test it out

[jagabo]

In my experience the ones labeled 1080p are 1920x1080 native. But the ones labeled 720p are all over the place. Anywhere from about 1024x768 to 1400x900.

[OrangeTTT]

If you don't need your files to be a fixed size, forget bitrate and use constant quality encoding. You get exactly the quality you want, the file turns out whatever size is needed to maintain that level of quality. You don't have to fret about what bitrate is "right" for you video.

I need them to be between 60 and 97mb in most cases.

[OrangeTTT]

http://rapidshare.com/files/133486245/corby1219202.avi

This is a 2 minute music video of a cover of "the scientist".....it's 1920x1080@4000kb/s{60mb}.......so if you guys want to dl it and tell what you think of the quality that'd be great.....use VLC player.

My PC monitor is a very high quality 8 bit 26in 1920x1200, but my current videocard is a gamma nightmare, so it's difficult for me to properly assess my results, but the 1920 definatelty looks clearer than using 960x544 as the res.

[OrangeTTT]

As a general rule, LCD's monitors/tv's display their best quality at their native resolution.

So if your model is a 720p native, then 720 would be the better resolution (assuming everything else is the same in regards to the source, and bitrate etc...)

It's 1920, but I always thought the higher the signal strength, the better PQ regardless of the screens native res