DVD encoding using TMPGEnc

[raybay49]

Hi All,
I am trying to encode a 1h-42m avi segment to Mpeg2 for DVD using TMPGEnc. The VBR I had initially set to Max 7000, Min 5000 & Avg 4500. However the encoded output file size was over 5 gb. I then reduced the Min to 4000 and Avt to 4000 but still the output is over 4.7 gb.

Will appreciate if anyone can suggest what would be the best settings to use to get a file below 4.7 gb without sacrificing too much on quality.

Thanks
Ray

[j1d10t]

Is that the file size after TMPGEnc encodes, or when you are authoring?

[raybay49]

Zefram,
It is after TMPGEnc encodes.

Rgds, Ray

[Scheif]

First of all, your average should be between your minimum and maximum. I don't know if you're just mistyping, but the numbers you gave make no sense.

Now, a question: are you creating an elementary video stream (.m2v) or a program stream (.mpg, with audio)?

At 4000 kpbs, an 102-minute elementary stream should be about 3 GB (4,000,000 bits/sec * 60 sec/min* 102 min * (1 byte/8 bits) = 3,060,000,000 bytes.

If you are creating a program stream, you have to add the bitrate of your audio, whatever that is. Even uncompressed LPCM audio at 192,000 bytes/sec, that would only come out to 1,175,000,000 bytes (192,000 bytes/sec * 60 * 102 / 8 ), bringing the total file size to 4,235,000,000 bytes.

So, there's something wrong somewhere.

[andkiich]

Use a bitrate ccalculator to determine what your bitrate should be. from your post, I'm surmising that you are guessing on what the bitrate should be.

I like the online Java calculator that is on this site, very easy to use and accurate.

[Vejita-sama]

Also it's normally best to set the max = your DVD players max rate (9.8Mbit/s), and the min REALLY low (eg. 300~1000kbit/s). The min will not normally drop that low btw

The ideais to give your encoder more 'wiggle room' for the high motion scences. Of course you set the average to your what ever the bitrate calculator says.