Weird error copying MKV file
Weird error copying MKV file
I have some locally stored media i was copying between drives and one mkv file gave this error error reading 'video1.mkv': Input/output error and only copied 176/256 MiB; the copied file plays the video only up to a certain point before abruptly closing;
I can play the original file fine albeit there is a noticeable hitch at that point but the video plays normally till the end
I have tried zipping the file but it fails to zip it
I tried copying it using ffmpeg but it also gave the same error
I can copy the file in the same directory but trying to copy the copy also gives the same error
I tried copying to a variety of different storage drives and it still gave me this error any ideas?
Seems like there's some bitrot in the middle of the file, and whatever you're using to play back the original file just skips it and doesn't care enough to halt playback. You might try looking for ways to restore as much of the file as possible with something like this, assuming the mkv is a unique copy that you can't get anywhere else.
Edit: I'm also curious if this file lives on an XFS/BTRFS/ZFS filesystem. The reflink property of these filesystems may be the reason that you can copy within the same folder without it throwing an error.
Yes it lives on BTRFS, I tried a few solutions but some gave this
Read error Error demuxing input file 0: Input/output error video1.mkv: Input/output errorand other things i tried said that i dont have hevc support(Yay Fedora) I might be wasting more time than necessary on the file.so i might just give upFair enough. I would at least try to get the damaged file off of the disk so you can potentially fix it later, or just have it available to play in its broken state. For the future you should probably be running monthly BTRFS scrubs to detect bitrot sooner, and potentially you should have some backups or data redundancy so you can repair the bitrot when it's detected.
i dont have hevc support(Yay Fedora)
Can't you install RPMFusion codecs and "fix" that?
It's very likely that your disk is failing.
dd if=/path/to/file.mkv of=/new/file/path.mkv conv=noerror,sync bs=4kShould give you a file with just the damaged bits missing.
Did you try copying it with dd/ddrescue?
Is the copied file going to a usb? Is the usb fake? Otherwise I'm pretty sure your source is bad. Probably the disk sector if you're sure the file was at some point complete.
Something like btrfs probably does block cloning or similar so a copy to the same disk probably just points at the same disk blocks as the original.
ffmpeg -v error -i file.avi -f null - 2>error.log
Check the source probably