Repair WMV AVI ?
in [UK Mac]
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From: Rowland McDonnell on 10 Mar 2010 13:21 Howard <Howard.not(a)home.com> wrote: > Jaimie Vandenbergh <jaimie(a)sometimes.sessile.org> wrote: > > > On Mon, 8 Mar 2010 19:37:32 +0000, Howard.not(a)home.com (Howard) wrote: > > > > > I have also tried > > >MediaInfo to see what codec they use. > > > > What did that come back with? It might be something (like IV50) that > > there isn't an OSX or Intel decoder for. > > > > If it's something a bit off the wall, take it to a Windows machine and > > do some transcoding there. > > > Thanks Jamie.... > > I have done everything now :-( I have moved all the problem files to my > PC and tries vlc and two repair apps. Even the repair apps say "this is > not an avi file" or wmv ... > Weird becaue they played perfectly when I got them. > > I think I have to kiss them goodbye and move on ..... Hmmm - sounds like they really have genuinely - somehow - undergone actual data corruption. I think it's worth having a look at the guts of the files in question - or rather, having someone who knows what's what look at 'em. I've met supposed video files that have turned out to be all zeros, barring the header. [snip] Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: Woody on 10 Mar 2010 13:26 Howard <Howard.not(a)home.com> wrote: > Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > > > Howard <Howard.not(a)home.com> wrote: > > > > > Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > > [snip] > > > > <http://www.versiontracker.com/macosx/index.shtml> won't. > > > > > > > > Rowland. > > > > > > Tks Rowland appreciate it. Unfortunately nothing there for repairing > > > wmv. > > > > Ah well :-( > > > > I've never heard of applications for *repairing* such files, FWIW. > > > > <shrug> Short of re-encoding... ? > > > > Could a re-encoding application help, perhaps? You'd get quality loss, > > but some of them are quite good at coping with badly mangled files. > > > > Handbrake, maybe? DVDRemaster, maybe? > > > > Another other offers? > > > Tks Rowland. On another forum someone told me that when Quicktime was > revamped a year or so ago they dumped a bunch of codecs. IF this is true > this may explain why they played perfectly about 18-24 months ago. They dropped codecs to make QuicktimeX (the one with the black window and no title bar, but Quicktime is still the same as it has been for a while. -- Woody www.alienrat.com
From: Chris Ridd on 10 Mar 2010 13:23 On 2010-03-10 18:00:07 +0000, Howard said: > I tried Handbrake etc. The mystery to me is that these files have been > in among many others that remain perfect. How they became corrupt and > not the others is very odd. Cosmic rays? There's no protection in the hardware or filesystem against files getting corrupted by random bit flips (etc), so it could just be down to that. -- Chris
From: Rowland McDonnell on 10 Mar 2010 14:09 Chris Ridd <chrisridd(a)mac.com> wrote: > Howard said: > > > I tried Handbrake etc. The mystery to me is that these files have been > > in among many others that remain perfect. How they became corrupt and > > not the others is very odd. > > Cosmic rays? Not enough of 'em to screw up a video file that badly, I wouldn't have thought. > There's no protection in the hardware or filesystem > against files getting corrupted by random bit flips (etc), so it could > just be down to that. Yeah, but when they thought it was cosmic rays, it turned out to be alpha emitters in the packaging material, and we don't have much of that problem any more. Moreover: you can't easily flip a bit on a mag disc. A cosmic ray won't do it. Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: Jim on 10 Mar 2010 15:13
Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > > They dropped codecs to make QuicktimeX (the one with the black window > > and no title bar, but Quicktime is still the same as it has been for a > > while. > > AIUI, QT X and QT 7 are just the names for the front-ends, the players. > Or am I wrong? 'QuickTime' describes the entirety of the product - the frameworks, APIs and ultimately the bits normal users see, the players etc. Jim -- "Microsoft admitted its Vista operating system was a 'less good product' in what IT experts have described as the most ambitious understatement since the captain of the Titanic reported some slightly damp tablecloths." http://www.thedailymash.co.uk/ |