cd help

[OldSimba]

I have a movie that states it fits on one disk. It's 715MB, how do I make it fit?

[jggimi]

Hello and welcome to the forum.

Assuming you're not ignoring Rule #6 (http://forum.doom9.org/forum-rules.htm), the answer to your question will depend on the size of your CDs, the format of your movie, and then the actual size of your file. It may fit as it is, or it may require cutting or restructuring. But since you haven't provided that sort of additional information, let's see if this will give you some guidance.

Let's first figure out if your file will actually fit. Assuming you're using 700MB CDs: 700MB is not 700,000,000 bytes. It is 734,003,200 bytes. If the size of your file is less than that, it should fit. If its only a few million bytes more, it may fit by a process called "overburning." Overburning will let a few additional million bytes be added to a disc, since most CDs have slightly more data capacity actually available on them -- say, 702 or 703 MB. Whether you can do this will depend on the media, your burner, and your burning software.

A 700MB data CD includes about 100MB of error correction information, or if you will, up to 800MB worth of bits and bytes. Some CD video formats, such as VCD and SVCD, include their own error correction, and can put 800MB worth of video and audio on a 700MB CD. If your video is in this format, the file(s) you have will be so called "CD Image" file(s), with filetypes such as .iso or .bin/.cue. These are not burned as data files, but are burned as "Images" since they include VideoCD file and directory structures, including error correction.If your video is in a A/V data file format (.avi, .mpg, .ogm, .wmv, .asf, .mkv, and others) and cannot be overburned, then you have a few choices: Purchase larger capacity CD-R or CD-RW media, assuming your burner and software are capable of using them. One can also use burnable DVD media (DVD+R, DVD-R, etc.) in DVD burners in the same fashion.

Extract the audio, reencode it to a lower bitrate, and remux it into the file so that it will fit with the untouched video into a 700MB container. Both audio and video are typically "Lossy" formats, you will lose audio quality, but this is usually far more acceptable than the results you would get attempting to reencode the video to a lower bitrate.

You may split the A/V file into multiple sections and put them on 2 CDs, or, split the file at a point where you may discard the remainder (such as at ending credits, if that split point is below 700MB).Should you wish to move ahead with options b. or c., and do not know how to proceed, just let us know what type of A/V file you have. More information from you, of course, means more and better guidance from the Doom9 community.

[Mug Funky]

Both audio and video are typically "Lossy" formats, you will lose audio quality, but this is usually far more acceptable than the results you would get attempting to reencode the video to a lower bitrate.

hehe... that's not true if your ears work better than your eyes. i'd be doing the opposite. of course, it depends on the delivery medium. if it's to go on TV then re-encoding is fine so long as the blocks are kept reasonably at bay.

there's also the option of burning mode-2 form-2. there are a few problems with doing this, but it's do-able.

715mb can be overburned pretty safely i think... make sure your burning program is set to "disc-at-once" rather than track-at-once. otherwise it simply wont overburn. (happened to me once in Nero - i knew i could overburn it, but the thing wouldn't let me no matter what i do.)

one thing - if you buy some higher capacity discs, you will have to do overburning anyway - this is how they usually work. a program like nero's CD-speed will tell you exactly how much space is on your blanks - tell it to scan until the 90 minute mark, and see where it stops. then enter this number into the overburn length setting thingy.

[manono]

Since he said it's supposed to fit on 1 CD, then I bet he just has a 715,xxx KB file which can be burned with no problems, since it's less than 700 MB.

[jggimi]

And, Mug Funky, I did use the modifier "usually" -- there are no hard and fast rules, since quality is subjective.

[theReal]

We don't even know if it's an avi/mpeg/.../ file or maybe an ISO or BIN file.
If it's an image file, then it will fit very easily because those image file formats are bigger than the actual movie data that will be burned to disc.

HoweverSince he said it's supposed to fit on 1 CD, then I bet he just has a 715,xxx KB file I guess this is the case