help to a newbie

[soniv]

Well, I was not sure where to post this thread cos I´m a newbie, but my problems are all in Gordian Knot and they seem to be preety easy to solve.Here goes...

1 - My biggest problem is the output file size. In gordian I see the expected size around 600 mb but in the end it gets ~850 mb.How can I get (and if it´s possible) the exact expected file size.(1 CD)

Related Questions:
In the bitrate tab inthe MODE field I see two options: "Calculate Average Bitrate" and "Calculate AVI File Size". What´s the difference between them?

Still in the bitrate tab... What does "Calculate Frame-Overhead" means? Does it matter on the final file size?

On the "divx encoding control panel --> Auio1 tab" window, what does the check box "Re-calculate Video-bitrate" do? Does it increase the output file size? And we have a similar checkbox "divx encoding control panel -->divx 3/5 tab" but it says if needed.When is that needed??

2 - My other problem is the subtitle. When you go to the subtitle tab in Gordian and open an ifo file, you choose the target directory for what?? And what about the indexin, I thought it was indexin the subtitles to the movie but in the final avi I couldn´t see any subtitles. In the "save .avs" window we can see another field about subtitles... should I mark something again?? I thought it was done before!And if I have to choose another subtitle file, which one shoul I choose??

As you can see.. I need help... Thanx for reading this. If there is something you can do to help me, please let me know.Sorry the bad english!

[llemor]

I think your first problem can be solved if you know the answers of the related questions. I'll give you quick answers, but you must read the guides on this site between lines.

"Calculate average bitrate" if you want to limit the encoded avi file size, say you want to save it in 700MB CD, so GKnot will calculate the average bitrate according to target size. On the other hand, "Calculate avi file size", if you set the encoding bitrates by yourself and you don't care how big the final avi file size is.

"Calculate Frame-Overhead" is an overhead during muxing audio with video. Final size of avi is equal to encoded video size + audio size + extra space due to muxing or overhead.

"Re-calculate video bitrate" is the adjustment of encoding bitrate for video after GKnot has determined the actual size of encoded credits portion of the movie and transcoded audio file. Enabling this will end up your final avi size almost equal to target file size.

For subtitles, please read the guides. It is really easy to understand.

[jggimi]

....How can I get (and if it´s possible) the exact expected file size.

Use the compression check. You usually won't be *exact*, but with DivX 3 or DivX 5 you will get very close.

..."Calculate Average Bitrate" and "Calculate AVI File Size". What´s the difference between them?

"Calculate Average Bitrate" is when you want GKnot to calculate a bitrate for the codec based on a specific size, such as 1 CD. It is the default setting.

"Calculate Average Filesize" is for when you want GKnot to use a manual bitrate setting, and come up with a filesize. I usually use this for small tests at a bitrate similar to what I'd get when I do a 1 or 2 cd encoding. I do this to test various filters or other settings.

... What does "Calculate Frame-Overhead" means? Does it matter on the final file size?

If you have audio with your video, there is some data throughout an an avi file to say ... "the following block of information is sound, in the following format" and that information takes up file space. It does effect the filesize, and GKnot gives you different options, because different types of sound have different types of overhead.

... what does the check box "Re-calculate Video-bitrate" do? Does it increase the output file size?

GKnot allows you to estimate the size of your sound file, prior to having it encoded. This estimation is then used, along with your interleaving overhead, the total file size you desire, and any other files, to produce an estimated video bitrate. That number is then used to calculate load factor from a compression check, and/or the bits/pixel*frame value. When you start a Gknot job, sound transcoding is the first thing it will do. The sound file it produces will probably have a different size than the estimate. GKnot then corrects the bitrate fed to the codec, to produce a more accurate video file size.

And we have a similar checkbox "divx encoding control panel -->divx 3/5 tab" but it says if needed.When is that needed??

I don't have GKnot on this pc, can't recall this checkbox, so I will leave this question for someone else to answer.

When you go to the subtitle tab in Gordian and open an ifo file, you choose the target directory for what??

For the subtitle index and subtitles themselves. Vobsub extracts them from the .vob files. It will create an .idx file and a .sub file in that directory.

And what about the indexin, I thought it was indexin the subtitles to the movie but in the final avi I couldn´t see any subtitles.

If you want to use DirectVobSub, which some video players can use, then move the vobsub files (.sub, .idx) into the same directory as your .avi file, and give them the exact same name.

DirectVobSub allows you to play subtitles, change languages, turn them off ... all without having them in the .avi file at all. They have to be in the same directory as the .avi, and they must have the same name.

In the "save .avs" window we can see another field about subtitles... should I mark something again?? I thought it was done before!And if I have to choose another subtitle file, which one shoul I choose??

This window allows you to make the subtitles permanent, as part of the .avi file. You won't be able to turn them on and off, or change languages. That is because they become part of the video itself..

Sorry the bad english!

Your English is Excellent!