PDA

View Full Version : dBpowerAMP can't open the .m4a files i have to convert them.



SpasticNoodle
08-02-2005, 03:20 AM
I have some m4a format songs that I would like to convert to mp3. However, when I try to convert them, it tries to convert them and then brings up a dialog box saying "Error whilst converting: example.m4a could not be opened." What could be causing this and how do I fix it?

Any help would be greatly appreciated.

xoas
08-02-2005, 05:26 AM
Have you downloaded and installed the mp4/m4a/Apple Lossless codec from here:
http://www.dbpoweramp.com/codec-central-mp4.htm ?

Can you provide some information about these files in terms of bitrate, channels, frequency, bits and also tell us what format and settings (bitrate, channels, frequency) you are trying to convert to?

Could you also try a test conversion to see if dMC will do a test convert or not. To do a test conversion open dMC and proceed as you would for a normal conversion except that where you choose format (such as mp3) for your conversion, choose "Test Convert (no write).

Best wishes,
Bill

LtData
08-02-2005, 06:08 AM
Was this file a iTunes-purchased song that had the protection removed? If so, what program did you use to remove it?

SpasticNoodle
08-03-2005, 03:34 AM
I already have the mp4/m4a codec. I tried running a test convert and the file still couldn't be opened. I am trying to convert to mp3 format, 128K bits, 44100 frequency. I don't have any information about the songs I am trying to convert, because I can't open them on my computer. I don't know if they have had their copy protection removed, because I got them off a friend who got them off his friend who most likely got them off his friend etc etc etc you get the idea.

Please Help!

edit: oops, I just realised I put this in the wrong forum.

Wayne
08-03-2005, 05:26 AM
Sounds like they are protected by DRM and that means you will not be able to convert them. I think most of the software that removes the protection component still needs for you to be able to play them on your PC.

Can the friend who you got them from play them on their computer? If they can, what software do they use to play them? iTunes?

Wayne

SpasticNoodle
08-03-2005, 05:53 AM
Yeah, he plays them using iTunes. is there any way I can remove the DRM protection? I want to convert them so I can listen to them on my computer and on my mp3 player (not an iPod)

LtData
08-03-2005, 06:05 AM
There's nothing you can do with the files on your computer. You will have to have your friend remove the DRM and then you use that file. Removing DRM is covered in the "DRM and Copy Protection" section of this forum.

xoas
08-03-2005, 11:12 AM
Aren't iTunes DRM files encoded as .m4p rather than .m4a? If they are as portable as you have maintained, you might want to ask what your friend uses to play these files. Perhaps all he needs is iTunes, if he is willing to put up with it. Or perhaps the friend can convert it to a more portable format.

But LtData may well be right about the DRM. Keep us posted.

Best wishes,
Bill

LtData
08-03-2005, 11:38 AM
Normally, yes, iTunes files are m4p. However, an incomplete removal of the DRM will result in your having .m4a files that are still protected.

As for your friend, since he can play these files, he can also unprotect them for you. Just have him use a tool like JHymn to remove the protection.

SpasticNoodle
08-04-2005, 02:18 AM
If I was to download iTunes for windows, could i remove the copy protection myself? maybe by using iOpener?

LtData
08-04-2005, 06:06 AM
Only if your friend authorizes your computer to play the protected songs. Your best bet is just to have him remove the protection.

SpasticNoodle
08-04-2005, 06:13 PM
Let me explain the situation in a bit more detail. my friend goes to a very expensive school, where every student gets their own laptop computer. They have Apple Mac OS X on them. They have a server that files can be uploaded to. So these songs have probably been circulating around the whole school, so I doubt they have copy protection on them.

LtData
08-04-2005, 06:56 PM
Can you play these songs in any player on your computer? If you can't, then the files probably DO have some DRM protection on them.

xoas
08-04-2005, 09:01 PM
I cannot guarantee that these files have DRM protectiion.
What I do know is that iPod has different formatting systems for Mac and Windows. I found the following piece of information at the iPod Lounge as an FAQ-Can I use my iPod on a Mac and on a PC:

The easiest way to use an iPod on both Mac and Windows computers is to format the iPod (using iPod Updater) using the PC. This will force your iPod to use the Windows file system (FAT32) which both the Mac and PC can read from and write to without the help of additional software.
If you need to use a Mac (HFS+) formatted iPod on a Windows PC, you’ll need to install XPlay 2.0 (or at least MacDrive) from MediaFour Software. This will enable your Windows PC to read Mac-formatted disks.
You can find this here:
http://www.ilounge.com/index.php/faqs/answers/can-i-use-my-ipod-on-both-my-mac-and-windows-computers/

This suggests to me that the problem may be one of formatting. Perhaps your friend has a PC version of these files already. If not then you may need to consider other resources. I have found the iPod Lounge and their forum to be a handy resource for iPod related issues (especially since I don't have one myself).

Best wishes,
Bill

SpasticNoodle
08-04-2005, 11:18 PM
I don't know if I can play these songs on my computer, because I don't have a player that supports them.

xoas
08-05-2005, 05:29 AM
If they are true non-copy protected m4a files you could try playing them through dB Audio Player using the m4a codec. I'm sure Winamp and other players will have m4a capability if you have the appropriate codecs installed. However, my hunch is that the truest test of being able to play these files on your pc would be to try iTunes.

Best wishes,
Bill

SpasticNoodle
08-06-2005, 06:45 PM
I downloaded Winamp and the mp4 plugin, and when I tried to play the files it said "Gain control not yet implemented." :vmad:

*sigh*

What does this mean?

xoas
08-06-2005, 08:11 PM
It may mean that the plug-in type you used is not supported.
The question could be better answered by tech support at WinAmp. With some research I found the following threads over there that may relate to your question and/or help you find a solution:
http://forums.winamp.com/showthread.php?threadid=191456&highlight=Gain+Control+not+implemented

http://forums.winamp.com/showthread.php?threadid=214206&highlight=Gain+Control+not+implemented

http://forums.winamp.com/showthread.php?threadid=193186&highlight=Gain+.m4a

http://forums.winamp.com/showthread.php?threadid=184038&highlight=.m4a

http://forums.winamp.com/showthread.php?threadid=182736&highlight=.m4a

Several on these mention using the in_mp4 plug-in. Is that what you used?
If not, I'd probably try that first.

Best wishes,
Bill

SpasticNoodle
08-07-2005, 10:23 PM
I am using audiocoding's in_mp4 plugin. Is this the one you mean?

I downloaded a program that someone mentioned in one of those threads called Foobar2000 and it couldn't play the songs either. It brought up error messages saying "Unable to find correct sound track in the mp4 file." and "Error opening file for playback."

Wayne
08-08-2005, 04:19 AM
Have you tried iTunes?

xoas
08-08-2005, 05:16 AM
I think Wayne is correct to suggest that you try iTunes.

I assume that these files are on a disk (cd-rom or cd-rw).
When you insert this disk in your pc, does your pc recognize the disk?
Can you open the disk on your pc to view (NOT to play) the contents?
What are the results?

Best wishes,
Bill

SpasticNoodle
08-09-2005, 05:39 AM
These files are on my hard drive.

I haven't tried iTunes yet, but I will.

SpasticNoodle
08-12-2005, 05:35 AM
iTunes refuses to play the files.

I don't understand what could be wrong with them. They have been copied straight from my friend's computer onto my mp3 player and then onto my computer. They play perfectly on his computer. His computer is a Mac (not his choice) and mine is Windows XP if it means anything.

xoas
08-12-2005, 05:45 AM
Did they play on your mp3 player?
Does your mp3 player support mp4/m4a/AAC and/or is it able to accurately support the transfers of files it cannot play?

I suspect that LtData's suspcions were correct, that these files may still have some degree of copy protection and that you will need to have your friend use a tool like jhymn to fully remove DRM (Digital Rights Management) restrictions to create a fully portable file.

Best wishes,
Bill

SpasticNoodle
08-12-2005, 05:23 PM
Nope, they didn't. My mp3 player only supports mp3 and wma.

xoas
08-12-2005, 07:17 PM
Can you tell me about your mp3 player?
Is it capable of copying and carrying data files?
Can it accept data files from a Mac?

Best wishes,
Bill

Wayne
08-13-2005, 03:41 AM
Not knowing how Apple's DRM works but if it is anything like Window's version to play protected content you need to have a licence for each DRMed file. The licence also controls what can be done with a file. Maybe they can be shared but not converted.

Do you know if your friend, using iTunes, is able to convert the files to mp3/wma on his Apple machine?

Update: Check out this link (http://www.hydrogenaudio.org/forums/lofiversion/index.php/t30590.html) which gives some details on how the DRM works in iTunes.

Wayne

xoas
08-13-2005, 07:48 AM
Nice link, Wayne!

SpasticNoodle
08-13-2005, 09:38 PM
When I try to play them in Windows Media Player with an m4a codec it says "Classfactory cannot supply requested class".

About my mp3 player, it plays mp3 and wma, and is capable of storing and carrying data files. That's all I know.

SpasticNoodle
08-27-2005, 06:01 AM
lol, I'm giving up. I'll just get the songs off Kazaa. Thanks for the help anyway guys. :smile2:

xoas
08-27-2005, 07:10 AM
I'm afraid the only alternative (to resecuring these tracks from another source) is to have your Mac friends reconvert these tracks to mp3 or wma and store thenm that way on your portable player.
We are not sure why this might be the case whether it is a DRM encryption issue or whether it is a matter of Mac and Windows using different systems for formatting data, or both.
Theoretically, if the issue were one of format incompatability, the earlier tip I posted from the iPod Lounge on playing tunes from a Mac iPod on a Windowes iPod might help, but there is no guarantee of this. It may be that the use of your mp3 player to store the audio data files may interfere with that tip being able to work.

Sorry we couldn't provide more effective help for your situation.

Good luck and best wishes,
Bill