3 hour DVD ??

[lordsmurf]

3420k = 175 minutes, and includes audio 192k-256k.

This is one of my primary encoding specs. It has some overhead too, so it can squeeze out 180 minutes if needed. Plenty of room was also left for full motion/audio menus, as well as 60-sec firstplays.

Most people DO NOT do separate video encoding from the audio. They typically do all the video and audio together. You have to with a capture device (DVD recorder, MPEG capture, etc).

About 3160k is the video only portion (when audio is 256k).

Again, all VBR for the video. Bitrate Viewer confirms these numbers as being NOT bogus.

The few times I tried the calculator on this site, it's given me skewed results. Screw math. This is tried and true experience.

[jimmalenko]

3420k = 175 minutes, and includes audio 192k-256k.

About 3160k is the video only portion (when audio is 256k).

Well there's the root of the argument right there !

Adam was talking about Video-only bitrate, whereas you're talking about combined bitrate. No wonder there was a big discrepancy.

[lordsmurf]

I'm not sure if he is or not. Look at his posts.
I'd like him to clarify his numbers.

Like I said, the specs I'm touting are ones I use all the time, and have for years. In fact, several pieces of MPEG hardware (DVD recorders) have these specs hard set.

[jakol]

hi,
not to be off topic here, just wanna make comments on maverick post, you guys can continue your calculation

Good question solarfox.... and I have sort of a good answer
I have a sony computer (RZ series) that has what sony calls a "giga pocket" capture card. This capture card is a sony propietary card, and most software doesn't recognized it. (If I knew this before hand, probably I would not have buyed it, but anyway....) It works with windows media center, but if I record using the media center, I end up with this file in .dvr-ms format. I tried several ways of converting this to .mpg (after all, it is an mpg with some wrapper) but I always ended up with sync problems.

I finally found a program that recognizes the capture card, but I can only capture using the best setting. Actually I have to double check on that, but last time I tried to change setting, I didn't found any option.
So that's my story
BTW, if anyone has a Sony RZ computer and knows of a good program for capturing mpeg's, let me know!

i called sony about this, the only program that can capture thru gigapocket is the media center or the Sony click to DVD software, and if u happen to capture with media center and ended up with .dvr-ms format Click to DVD can convert it to .mpg, an hour of video only takes minutes to convert. I dont usually do this method though i use my DV cam analog pass thru to capture via firewire for later editing.

cheers.

[jimmalenko]

At 256kbits audio, 3 hours of content would use about 3140kbits. Now THAT number I am sure of

Adam's notation implies to me 3140k video, 256k audio. Total:3396k.

A bitrate of about 3420k and 256k audio will yield a DVD of just under 3 hours.

LS's notation implies to me 3420k video, 256k audio. However, I think he means 3420k total, so therefore 3164k video, 256k audio.

See the difference ?

[FulciLives]

3420k = 175 minutes, and includes audio 192k-256k.

About 3160k is the video only portion (when audio is 256k).

Well there's the root of the argument right there !

Adam was talking about Video-only bitrate, whereas you're talking about combined bitrate. No wonder there was a big discrepancy.

When I said 3100kbps with 256kbps audio I meant video bitrate 3100kbps and audio bitrate 256kbps with the combined being 3356kbps which I guess is not that far off from 3420kbps

I think LordSmurf confused us all by combining them since that really is not the 'standard' way we talk about bitrate. Normally we split video and audio and not give a "combined" total.

- John "FulciLives" Coleman

[jimmalenko]

When I said 3100kbps with 256kbps audio I meant video bitrate 3100kbps and audio bitrate 256kbps with the combined being 3356kbps which I guess is not that far off from 3420kbps

I think LordSmurf confused us all by combining them since that really is not the 'standard' way we talk about bitrate. Normally we split video and audio and not give a "combined" total.

My point EXACTLY. I'm glad someone in this thread understands

[adam]

I'm not sure if he is or not. Look at his posts.
I'd like him to clarify his numbers.

Like I said, my numbers came straight out of a bitrate calculator so obviously I was only referring to the video stream's bitrate. Bitrate calculators do not report the total combined bitrate because that is not something that ever needs to be calculated. Audio bitrate and additional overhead are things that you subtract out of the equation when performing your calculations. Its always the video only bitrate that you are calculating.

I also don't think that it was just a coincidence that my numbers matched up with everyone else's.

[lordsmurf]

We're on the same page now. 8)

[maverick]

Interesting (and quite confusing) discussion going on. Anyway, I ended up using half D1 resolution with 3000kbps bitrate with satisfactory reults.... so thanks guys!

Thanks for your answer jakol, but the problem with Click to DVD is that when I try to manually capture video, it automatically stops at 1 hour.... and I'm trying to capture bigger videos. I know videos recorded with Media Center can be burned directly to DVD with Click to DVD, but I want to do some small editing first, before burning. BTW, using Sage TV recorder (free trial avaliable at their page) you can also capture video using the giga pocket.

PS. Your page has been of great help Lordsmurf. I discovered it a while ago (before it was renamed to digitalfaq) and I have learned quite a bit over time.
So thanks, keep up the good work!