dvd - play longer than 2 hours

[Shaorin]

How can i make a dvd play longer than 2 hours

[Cobra]

Encode to a lower bitrate.

[thecoalman]

You can lower the bitrate as suggesed above. Lower bitrates result in lower quality, additionally you have to adjust the resolution according to the bitrate. For example 720x480 will look great until you hit about 4000, anyhting below that and you need to use a lower resolution.

[Shaorin]

Is there a calculator that i can work out how many bitrates for x amount of hours

[ZippyP.]

Is there a calculator ...

Yes there is...here.

[Bjs]

You'll find the info inside ifoedit ...

Ntsc
720x480
704x480
352x480
352x240

Pal
720x576
704x576
352x576
325x288

The lowest video bitrate should not fall below 3200 , you will start seeing some form of video pixelization occur .

Those at 352x??? can come down to 2200 for vide bitrate .

Video actual format size is one thing missing from that calculator

[ZippyP.]

Video actual format size is one thing missing from that calculator

Because you don't need it. Running time, bitrate and file (or disk) size are all that matter.
Running time X Bitrate = File size

[Shaorin]

Kind of confused. One person is saying i can low as 4000 bitrate for 720x480 and another person saying i can go low as 3200 bitrate. Which is true?

[daamon]

Kind of confused. One person is saying i can low as 4000 bitrate for 720x480 and another person saying i can go low as 3200 bitrate. Which is true?

Both - It depends on personal perception of (key word) acceptable quality after encoding which is, among other things, dependent on the quality of the source file.

Source = DV AVI and encoded to MPEG2 for DVD at 3,200 and some may find this OK.

Source = Xvid AVI and encoded to MPEG2 for DVD at 4,000 and others may not like it, or my accept it.

Seeing as you make no mention of your source, helping in this repsect isn't possible at the moment.

[Shaorin]

I'm trying to encode a anime series

[daamon]

I'm trying to encode a anime series

Your anime series will be stored in a file on your PC. Download and open up that file in GSpot (v2.52 beta).

Take a screen shot and post that. It's that info that will help...

[Shaorin]

[thecoalman]

Well considering the source resolution is 640x480 I'd go with a resolution of 352x480 and a bitrate of 4000 or less.... Anything over 4000 won't make a difference because of the reduced resolution. How low to go depends on the length of the video.. If you can use 4000 that's what to use.

BTW the reason I suggest reducing the resolution is because when you increase resolution it usually results in macroblocking and atifacts.... in short it looks like s***. The resolution above is the next one down from your source.

[Bjs]

Video actual format size is one thing missing from that calculator

Because you don't need it. Running time, bitrate and file (or disk) size are all that matter.
Running time X Bitrate = File size

Actually you are incorrect ... with it , you will get a very accurate final output size ... at the moment , it's guessing ... close , but not good enough ...

[Baldrick]

Video actual format size is one thing missing from that calculator

Because you don't need it. Running time, bitrate and file (or disk) size are all that matter.
Running time X Bitrate = File size

Actually you are incorrect ... with it , you will get a very accurate final output size ... at the moment , it's guessing ... close , but not good enough ...

you can calculate the exact output size but no video encoder uses exact bitrate. fit2disc is one the most accurate calculators for dvd.

[shadow74uk]

Just want to tag my thanx onto this thread as you have answered a question i had about bitrates. Thanks guys

[Shaorin]

So can i use 720x576 at 3232bitrate? will the dvd player able to read it? the quality looks fine when i encoded it

[daamon]

So can i use 720x576 at 3232bitrate? will the dvd player able to read it?

Yes. Yes.

the quality looks fine when i encoded it

If you're happy, and it plays, then problem solved.