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3rd March 2002, 11:54 | #1 | Link |
Xvid + Ogg + Vorbis = :-)
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IDEA : If OGG can handle errors in streams, could we use something like vcd ?
Ok heres what im thinking about :
i know, there has been some discussion why not putting avis into an cd track without error correction, just like a (s)vcd does. This wasnt possible, because the avi format cant handle errors, if they occur. but now we have ogg, and i read, that it can handle errors, without stopping or crashing. So it should be possible to make use of the 100 additional mbs on a cd, when we dont use error correction, isnīt it ? greetings actron |
3rd March 2002, 12:11 | #2 | Link |
fresh brains!
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should be possible. Someone on another board ( PowerDivX Forum ) postet that he randomly deleted parts of an .ogg file with a hex editor and the parts that were not damaged still played fine.
I want to try to burn an .ogg file like a (S)VCD, too. But I don't have time to do something like this at the moment. Would be interesting to hear if someone else could do it successfully. Btw: when creating an .ogg file to burn on a CD without error correcting I suggest that you set the max. keyframe interval very low ( I would say the value should be as high as the FPS (and not higher or lower) of the video ). Otherwise you *may* lose a couple of seconds when the CD gets damaged. |
3rd March 2002, 22:39 | #5 | Link |
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How can you burn a CD in Mode2Form2 (?) because I tried it with Nero (that I usually use) and other several programs but by now I only failed. I saw in a forum that someone did it with CDRDAO, but when I downloaded it, it said that is for audio CDs; and I couldn't find a GUI for Windows. I would really like to test if Ogg can correct a certain amount of errors, becuase I find it hard to believe that an error in the header or index could be fixed (does it save a backup of these at the and of the file as I "heared" MCF would?).
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4th March 2002, 04:24 | #6 | Link |
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I've used ISO Level2 Mode2 with Nero constantly while burning all my Divx and Xvid encodes. I never had any problems using this mode and wasn't aware that it's not suppose to work with AVI's. I also used this same mode for Ogg files without issues. So are these settings you guys are speaking about?
@Neo What burning app are you using?
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4th March 2002, 06:21 | #8 | Link |
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Under Windows I mostlty use Nero. Sometimes CDRDAO. Under Linux though every thing almost uses CDRDAO at some point. I have not burned a 2 from 2 disk with an OGG movie. But it should indeed work. Swiss cheezing the video has little effect on it. So CRC and recovery data while nice are not actually necessary. I would prefer it for my AVI though. One or two misplaced bits and your AVI is toast.
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4th March 2002, 13:05 | #9 | Link | |
fresh brains!
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Quote:
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4th March 2002, 23:20 | #11 | Link |
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@Mozart: Thanx for the GUI. I'll try it.
@MaTTeR: Here's a dumb question: How do you actually write the CD because it my case when it's about to start burning it ejects the CD(-RW 663 MB) saying there is not enought space. I've been trying to put a 701 MB AVI file on it (the CD in mode 2 should have 750+ MB, right?). Is there any trick? I've done everything as usual, only that I selected Mode2/XA in the dialog. Do I have to enable other features? Thanx.
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5th March 2002, 01:49 | #12 | Link |
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@Vanos_b
Turn the overburn option on in the Nero prefs which I think is located under the File menu
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5th March 2002, 21:27 | #13 | Link |
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Sorry, but it doesn't work. Even with overburn activated (99mins) it sais there is not enought space. I'm using an LG 16/10/40, that otherwose works perfectly. BTW: overburn should write data on the space of leadout, and I don't think it has anyting to do with sqeezing more data in the same data space on the disk by leaving error correction out. Please correct me if I'm wrong.
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5th March 2002, 21:39 | #14 | Link |
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@Vanos_b
Are you sure your drive supports overburn? It seems new so I'd assume it does. How much data are you trying to write to an xx CD?
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8th March 2002, 22:33 | #15 | Link | |
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Quote:
Do you MEAN that are already using 80min CDs at near 800 Mb? nice is using 2352 byte sectors... how? In my technical knowledge I can say that mode 2 form 2 CDs are recognized by common CD readers at low speeds such as 12x-16x, or if they spin at full (50x) speed, in real performance they transfer at relatively low speed (12x-16x). And also, these security measure is (for me) the reason for this "low" speed transfers: the lack of error checking portion per sector (2352 bytes of data over 2352). This slow behaviour often happen with Playstation CDs (when you try on your PC), infact I think that almost the totality of these CDs are mode 2 form 2. |
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8th March 2002, 22:51 | #16 | Link | |
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ISO Level 2 Mode2/XA Secondary Volume Descrip-Joliet Allowed all relaxed ISO restrictions Character Set-ISO 9660 No Multi-Session DAO Finalize CD CDRW-LiteOn 40x16x10 I'll be honest, I don't really understand all the technical aspects of CD burning. What I do know is when I burn my Xvid's/Divx flicks it works just fine. The CD's have been played back without issue on different CDROM drives. So is this what you call Mode2/Form2?
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8th March 2002, 23:21 | #17 | Link | |
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Quote:
classical ISO CD format: sector size 2352 bytes (2048 bytes data, 304 bytes CRC/recover info) alternate ISO CD format: (VCD?) sector size 2352 bytes (2352 bytes data, no bytes for CRC/recover info) P.S.: mode 2 form 2 that you are using is mode2-XA? sorry for my not good technical competence |
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9th March 2002, 01:07 | #18 | Link |
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what does it say under "compilation" when you're actually burning it? because i'm doing a 750 mb test file now under the specs you listed and it tells me:
Code:
ISO1 (Mode2/XA) 85:17.43 CD-ROM (ISO) 855 MB |
9th March 2002, 01:11 | #19 | Link |
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With Imation CD's I usually burn an AVI file of about 712MB and then Nero says something like 8xxMB. Next movie I burn I'll give you more accurate numbers.
Your 755MB file is to large. Try around 710MB and then see what it says.
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9th March 2002, 01:17 | #20 | Link |
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i wonder if you're actually burning mode 2 form 2 cds then, or if you're just going into overburn territory. because i think with an 80 min cd-r, it should be able to go up into the upper 700s. has anyone actually gotten 750+ mb on an 80 minute disc?
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