Bug#531079: RFS: ecm -- prepares CD image files so they compress better
Joachim Reichel wrote: Loic: I'm happy to sponsor this upload if you can get the data loss bug fixed. There might be some small changes to the packaging needed, but I'm confident that these can be easily sorted out. I haven't been able to reproduce this bug once. I tried with raw images smaller than 2GB (1.9GB), between 2 and 4GB, and over 4GB. On raw images smaller than 2GB, everything work fine. On images bigger than 2GB, ecm aborts cleanly with the following error message: Encoding foo.iso to foo.iso.ecm. foo.iso: Value too large for defined data type It doesn't even start creating the .ecm file. Also, in the event you had a crash and the .ecm file didn't finish (it can take a while), the original .iso is never modified - the .ecm file is created as a separate file, so I also don't know where the original data was lost. I've been using ecm on i386 and amd64 without any data loss for a few years now. Although the program should also work on other arch, are you using something different? Loïc -- To UNSUBSCRIBE, email to debian-wnpp-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Bug#531079: RFS: ecm -- prepares CD image files so they compress better
Hi, >> I am looking for a sponsor for my package "ecm" >> >> * Package name: ecm >> Version : 1.00 >> Upstream Author : Neill Corlett >> * URL : http://www.neillcorlett.com/ecm/ >> * License : GPL2+ >> Programming Lang: C >> Description : prepares CD image files so they compress better > > I had a quick look at your package and did not find a problem, though I > would have to give it a closer look before upload. > > Unfortunately, ecm seems to have a problem with files larger than 2 or 4 > GB (I tried the 1st Debian Lenny DVD). I ended up with a file of size > 381 MB :-((. I'm aware that ecm does not claim to handle DVD images, but > it also does not refuse to handle them. I consider this a grave bug > (data loss). > > I did another test with the first Debian Etch CD. ecm reduced the size > of the image by 0.03%. Compressing the original ISO and the ecm-prepared > version with bzip2 gave a 0.097% advantage for the ecm-prepared version. > Do you have any number where ecm shows a reasonable gain? Ruben Molina kindly pointed out to me that my test setup was flawed. ecm should be applied to RAW files, not to ISO files. Another test with a RAW image gave a similar improvement to what is reported on the ecm homepage (~15% after compression). Loic: I'm happy to sponsor this upload if you can get the data loss bug fixed. There might be some small changes to the packaging needed, but I'm confident that these can be easily sorted out. Joachim -- To UNSUBSCRIBE, email to debian-wnpp-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Bug#531079: RFS: ecm -- prepares CD image files so they compress better
Hi Loïc, > I am looking for a sponsor for my package "ecm" > > * Package name: ecm > Version : 1.00 > Upstream Author : Neill Corlett > * URL : http://www.neillcorlett.com/ecm/ > * License : GPL2+ > Programming Lang: C > Description : prepares CD image files so they compress better I had a quick look at your package and did not find a problem, though I would have to give it a closer look before upload. Unfortunately, ecm seems to have a problem with files larger than 2 or 4 GB (I tried the 1st Debian Lenny DVD). I ended up with a file of size 381 MB :-((. I'm aware that ecm does not claim to handle DVD images, but it also does not refuse to handle them. I consider this a grave bug (data loss). I did another test with the first Debian Etch CD. ecm reduced the size of the image by 0.03%. Compressing the original ISO and the ecm-prepared version with bzip2 gave a 0.097% advantage for the ecm-prepared version. Do you have any number where ecm shows a reasonable gain? Don't most CDs/DVDs contain data (software, music, video) that is already compressed in one way or another? Therefore I would guess that removing some very small amount of hard-to-compress data doesn't improve the overall situation. For these reasons I'm currently inclined not to sponsor this package. Also, ecm-prepared/compressed images don't seem to be widespread as far as I can say (and the software is 7 years old). Joachim -- To UNSUBSCRIBE, email to debian-wnpp-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
