iTunes corrupting video files on metadata changes

Although I realize that you should be able to do this in iTunes, you might want to try using a third party mp4 tagger. There's probably something about the way the file was originally produced that iTunes doesn't like but is willing to tolerate until you actually ask iTunes to work with the file. Then it wants to di things its way which is probably not consistent with the original structure and *crunch*.

A pause is typical as video files are large end editing tags probably results in the whole file being re-written.

I am also experiencing this issue. Large MP4 videos become corrupted when attempting to change metadata. The video are added fine and are playable, but as soon as I try to apply metadata changes, iTunes hangs, and I have to force quit the app. The videos are then corrupted and unplayable either in iTunes or with another video player. This happened to me with two MP4 videos. I had no issues with a third, also fairly large (>1GB) MP4.

OS X 10.7.4

iTunes 10.6.1

Hello,

I am also experiencing this. I tried changing the cover art for a few MP4 files, each time iTunes hangs and I had to force quit. The files failed to load onto my iPhone, and when I tried playing on a PS3, the file shows up as corrupted.

Any ideas on how to repair these files?

Hi,

I too was experiencing this issue with itunes, however, I noticed a pattern that may help others experiencing this issue. My files were imported into Itunes and played without issue, until I made any change to the Metadata. Some files played with no problem and had the information changed quickly, other files just refused to play at all after the change. Those files which would no longer play were originally encoded as XviD files (in every case), Those files where changing the metadata had not prevented them from playing were originally encoded using H.264. All of the files were re-encoded for the ipad using Handbrake.

This may not repair files for others with problems, but I hope it give some a place to look to begin to find a solution to this issue.

Hi,

Also experiencing this problem. I have not done updates to 'get info' data for a few weeks and have now lost a whole series of videos to this issue after doing some updating. Seems also to be related to updating artwork.

After much trial and testing it seems to be related to the NAS where I have my video files stored. Any updating of metadata I do on my computer local HDD is no problems, just files on the NAS (DLink DNS-320 ShareCenter).

For myself doesn't seem to be related to the video encoding (at this stage). The files being corrupted are of various original encoding, including direct H264 copies from DVD.

Another point I found that may help is the file size. I was able to do metadata (artwork) updates on a small file on the NAS (25MB) successfully, but once I went to over approx. 100 MB it failed. Wonder if it is speed to update issue, although it is on a 1000MB network, and worked previously.

Am yet to tackle DLink regarding this issue, but thought I would share thoughts here first. I did extensive searching for this issue, and this is the closest thread found so far.

There are only two changes that have occurred recently - iTunes 10.6.3.25 first, did some video updates after that with no problems, then did the firmware update of the NAS. Up to this point I have had around 600 files, updatng the metadata and artwork etc, in iTune from the NAS with no problems.

I suspect that it is not just the fireware update alone as it has been around since Sept-2011, and does not seem to be any talk out there that it is a problem. Pointing so far to a combination of the NAS and latest iTunes - I can't backwards update the NAS firmware, so that makes it difficult to prove or fix.

Hope this helps. I'll provide another comment if I find out anything further.

Hi all,

same problem here, but in a windows (shame on me...) network:

* Two PCs w/ Win 7 64-bit

* iTunes 10.7.x

* iTunes library on a D-LINK DNS-320 (firmware: 2.02.x)

After editing metadata of video files (adding art, changing title OR adding some details like year) the file is corrupt and will no longer play: not in iTunes, not in Quicktime, neither VLC nor MPC or any other Windows video software.

This happens always(!), it doesn't matter what PC I use to edit the metadata. Doesn't matter, which video encoder (Freemake, Aisee, even Quicktime and it's ATV-profile) I use. The original video input format doesn't matter.

Downgrading the D-Link firmware to 1.9 and/or iTunes to 10.6 doesn't give a result.

Today even some mp3 got corrupted after adding cover art. Therefore i can't believe the file size is the reason.

Maybe this is a hint: In Windows Explorer (something like the finder on a mac) I can't change the owner nor the user rights of the (corrupted or not yet corrupted) file. Is there any problem known relating to iTunes read-write-ability and NAS user rights whr storing the iTunes library on an external HDD?

What about the library size or the amount of media objects (130 movies, 500 TV Shows, 15000 mp3, ...)?

Any ideas or solutions anyone?

Or a good mp4-tagger (incl. cover option) for Windows?

:-/

regards,

martin

Hi,

Sorry for slow reply back....

Only solution I found was to get onto DLink and they sent me the latest (beta) version of firmware for DNS-320. That was version 2.03 (DLINK_DNS320.2.03b03(2.13.0618.2012)(BETA)). Usual warning about "backup your data first", (which is amusing as the reason for having TB sized storage is for the space, so where to back it up this data to.....) anyway, held my breath and did the firmware update. It worked for me no problems, and any updating in iTunes (now ver 11) is working fine - with video files, don't have much music to try.

DLink didn't admit anything, but were pretty quick to send me the firmware update, so I assume they knew about it.

Prior to this, I found that once the files were corrupt, they were dead. Luckily I found the problem before killing off too many of my files.

So sorry can't help you with dead files......they might be too far gone to retrieve.

This bug has just bitten me as well, two .mp4 files (one 793MB, one 490MB). Both encoded using latest verison of Handbreak from DVD. Files are stored on an external HDD (Seagate GB USB).

Video files will not play using any external program, I'll have to redo from the original DVD.