Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion. Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules. |
15th August 2013, 09:42 | #1 | Link |
Registered User
Join Date: Dec 2009
Posts: 4
|
Data on SDHC Card but no Container
Good Morning experts
I have a big problem and have no idea anymore, how to resolve the problem. I had a wonderful videoshooting and recorded the sound to my harddsik recorder (4Minx) to a SDHC card. The card get full of data, but the recorder didn't write a filename (container). So I see only, that the card is full of data, but no file or folder is to see. Is there a way, to recognize the data? To give access to the disorganized data? Thanks for any help. Sending all the best. Zelot |
15th August 2013, 12:18 | #2 | Link |
Software Developer
Join Date: Jun 2005
Location: Last House on Slunk Street
Posts: 13,248
|
"No filename" and "no container" are two totally different things.
The container format is determined by how the file was created, i.e. by the content of the file. The file's name (with or without extension) doesn't matter at all. For example: If I have an MP4 file "foo.mp4" and I rename this to "foo.avi", it still remains an MP4 file! The same holds true, when I rename it to "foo.bar" or just "foo" If you have a file and you are not sure which format it is, use a tool like MediaInfo to find out what it is. Then you can rename it to the "correct" file extension. There can be data that has no container at all. Like "raw" H.264 streams, for example. But as soon as you have audio+video in one file, it necessarily has a container.
__________________
Go to https://standforukraine.com/ to find legitimate Ukrainian Charities 🇺🇦✊ Last edited by LoRd_MuldeR; 15th August 2013 at 12:38. |
15th August 2013, 16:20 | #3 | Link |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
I'm not really sure what your problem is, you need to clarify the problem a little more.
However, the recovery software I would recommend would be TestDisk & PhotoRec (GPL Open source). Here on WikiPedia: http://en.wikipedia.org/wiki/TestDisk Read instructions carefully, and take your time.
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? |
16th August 2013, 08:48 | #4 | Link |
Registered User
Join Date: Dec 2009
Posts: 4
|
Thanks for your inputs, and sorry for my impreciseness.
My problem is: I recorded sound with my hardrecorder to a empty sdhc card. The recorder didn't write a file. (I don't see a file in my explorer, the card seems to be empty). But if I check the space of the card, I see, that some data must be on the card. (but in no files). So the recorder recorded data to the card, but didn't put them into files. I already checked Test Disk, but it could'nt allocate the space to files. Is there a software, that can allocate undefined data to files? |
16th August 2013, 14:47 | #5 | Link |
Software Developer
Join Date: Jun 2005
Location: Last House on Slunk Street
Posts: 13,248
|
This sounds very much like there was some error during the recording process, e.g. the file was not closed correctly.
You would often encounter this kind of problem, when the recording was not stopped correctly, but instead the device went out of power. This means the data might actually have been written to the SD Card, but there is no file system entry to actually map that data to a file. Without the correct file system entry, it is impossible to know which of the "raw" data blocks actually belong to the file - and in which order. All you can do in this situation is NOT write any data onto the SD Card and use some data recovery tools, as StainlessS said. (I once used "PhotoRec" to recover the photos from a friend's memory card, which he had formated "by accident" - it was successful)
__________________
Go to https://standforukraine.com/ to find legitimate Ukrainian Charities 🇺🇦✊ Last edited by LoRd_MuldeR; 16th August 2013 at 14:51. |
16th August 2013, 17:13 | #7 | Link |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
Try again, I think I'm correct in saying that PhotoRec can identify media files by their content (some time since I had to use either),
also there is (I think) a quick scan method and a slow scan which scans entire disk, use that. Do not try to recover in-situ, and choose to write recovered data to a hard drive. One of them (TestDisk I think) has a drive imaging function, so you can take a snapshot of entire SD card and write to a file, and do recovery work on that image file. You are unlikely to find recovery software, either free or commercial that is significantly better than the mentioned utilities. (Although they may have a nicer interface or GUI)
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? |
16th August 2013, 18:15 | #8 | Link |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
Here link to PhotoRec:
http://en.wikipedia.org/wiki/PhotoRec And here a list of file formats recovered (EDIT: by sector content) by Photorec, it is quite comprehensive: http://www.cgsecurity.org/wiki/File_...ed_By_PhotoRec
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? Last edited by StainlessS; 17th August 2013 at 03:52. |
17th August 2013, 16:44 | #9 | Link |
Registered User
Join Date: Mar 2009
Location: Germany
Posts: 5,769
|
@OP: put back the card into the recorder and play the recordings. If they do, as I would expect, then the recorder used a special format so you have to use its tools to get the music back to computer. Using "recovery" tools you may distroy the original formatting in an attempt to "correct" the "errors".
Are you sure you know how to operate the recorder?
__________________
Born in the USB (not USA) |
18th August 2013, 03:36 | #10 | Link |
Registered User
Join Date: Mar 2011
Posts: 4,829
|
I had a look at the 4Minx manual last night, but got distracted and forgot to post. Without downloading the manual again.....
The 4Minx uses the fat32 file system for SDHC cards. It saves the audio as files which are basically wave files with a different extension (I can't remember what it is off the top of my head). If something went wrong, I've no idea what or why, but it sounds like you should be able to see the files on the card with a PC. Have you used the SDHC card before and know there's nothing wrong with it? It's not a "fake" or anything like that... something which claims to have more capacity than it really does? Have you used the same card in the PC before without a problem? |
22nd August 2013, 00:27 | #11 | Link |
Registered User
Join Date: Aug 2013
Posts: 10
|
Is there anyway that you can avoid this type of corruption from happening? Sometimes we don't pay attention to battery life or something goes wrong, so it would be nice to have a little back up and to not have to work so hard to get the file. Or, is it just best to have a good file backup system around? I have had this problem before when I was young, but the files weren't all that important so I just left it.Thanks for asking the question and all those who have responded.
|
24th August 2018, 12:25 | #12 | Link |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
Just noticed that TestDisk and Photorec have been released (18 April 2015) at version v7.0 (my old version was v6.14).
https://www.cgsecurity.org/wiki/TestDisk_Download And v7.0 Release notes:- https://www.cgsecurity.org/wiki/TestDisk_7.0_Release (there is also a v7.1.Beta available via above link) EDIT: I somehow 'lost' a partition, attempting recovery. EDIT: Recovery successful.
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? Last edited by StainlessS; 24th August 2018 at 13:56. |
10th April 2019, 01:15 | #14 | Link |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
Foxy,
Today I zapped a load of files deliberately, then realized that there were I few mixed in that I had not intended delete (NTFS disk). I did a quick recovery using Photorec, but then after about 20 minutes, thought that I would try another app (was gonna take long time and I wanted to select files types to recover [ie video]). So I tried one prog that I have installed on all (except W10 for some reason) machines, PiriForm Recover, v1.53:- https://www.ccleaner.com/download Quick recovery mode in Recover, failed to recover several files that PhotoRec recovered, however I noticed that about 3 of the files that PhotoRec recovered were corrupt near end whereas Recover versions were intact. (not the files I was wanting recovery for). Anyways, just thought I'de suggest trying Recover if you still have corrupt ISO, might be worth a bash. [It could be that the 3 corrupted PhotoRec files were being recovered when I aborted the recovery (it would not stop <quick enough> so I did a Forced Reboot), EDIT: However, think is unlikely that PhotoRec was simultaneously trying to recover 3 files at once. It could be that there were more than one version of the corrupt files on the disk, ie Photorec could have found different ones to those recovered by Recover]. PiriForm (makers of CCleaner [Crap Cleaner]) Recover is currently at v1.53 and has been for quite some time I think, and that could indicate that it is in quite stable state. EDIT: I just used the Free version Recover.
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? Last edited by StainlessS; 11th April 2019 at 14:05. |
25th November 2019, 15:18 | #15 | Link | |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
Testdisk & PhotoRec updated to v7.1 Stable, July 2019:- https://www.cgsecurity.org/wiki/TestDisk_Download
Also a v7.2 Beta available from same link. There is also a forum where expert assistance may be available:- https://forum.cgsecurity.org/phpBB3/ EDIT: Quote:
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? Last edited by StainlessS; 27th November 2019 at 04:48. |
|
23rd March 2020, 20:08 | #16 | Link | |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
Just came across this thread again when searching, here is a tool to assist in recovery of simple text files.
Quote:
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? |
|
29th November 2020, 21:55 | #17 | Link | |
HeartlessS Usurer
Join Date: Dec 2009
Location: Over the rainbow
Posts: 10,980
|
Quote:
For XP/Vista/Win7 [Win 10 unknown] Also download for MAC. I have not tried it [yet]. Lexar are heavy duty into SD cards [They also provide SD card formatters with special options]. EDIT: All comments from users at above link are +ve.
__________________
I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? Last edited by StainlessS; 30th November 2020 at 02:38. |
|
|
|