 [UPDATE]: FIXED by @RinCat 😍 Thanks you all for feedback! 👍 --- The corrupted MP4 segment: https://www.peppercarrot.com/extras/videos/2022-12-18_F_shading-crash.zip 34 comments | Expand all CWs
@davidrevoy I’m sorry to hear that. With OBS, consider switching to MKV video. It’s much more tolerant with failures and should be easy to recover if a similar event happens in the future. @ede Thanks, yes, I read that. I switched to MKV, I had no idea MP4 was that dangerous to record a session.  @davidrevoy ok, i'm testing more things, give me a few minutes (maybe hours) @janpod Oh yes. While trying to fix it myself without success, I saw that MP4 was a trap. Yes, I switched OBS to MKV now, but the corrupted segment is ... lost.  @brightside is there maybe something you can do to help @davidrevoy retrieve their corrupted MP4 video? @RinCat Hey, Thanks. OK. Here is the ending of the segment after I did the reboot of my machine, it's a shorter segment, but had same bitrate/format/mp4 https://www.peppercarrot.com/extras/videos/2022-12-18_F_shading-end.zip @davidrevoy Since the moov is missing, there is little hope i'm afraid. If you can record another video with the *exact* same settings, you can try to use untrunc https://github.com/anthwlock/untrunc For future reference, you can configure obs to record MP4s that are more resilient against crashes. https://obsproject.com/forum/resources/how-to-fix-mp4-mov-files-corrupting-when-obs-studio-crashes.1293/ @davidrevoy mp4 files have an important part of their metadata at the end and if a file is incomplete, this part is missing. However sometimes this part can be transplanted from an otherwise identical file (same source software, same settings) to get the file working again. This part is called the MOOV atom. Maybe this info helps to find some tools. @davidrevoy You have this issue: [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55a3165c04c0] moov atom not found It is repairable (maybe) but you will need to perhaps have another good video from the same source to reference. Search for "moov atom not found" and see which is best for you depending on operating system. Sometimes, the repair tools are not free! @davidrevoy PS: maybe ffmeg as an option to ignore some errors? @davidrevoy I had the same issue a while back, there's a free software called Handbrake, convert it from an mp4 to an mp4 (yes, really!) in Handbrake and it should fix your issue!  @davidrevoy I tried to open the mp4 file using Movavi Video Suite, I figure that it could extract the uncorrupted files, it didn't work. Sorry. @SammyGalen Thanks for testing and checking. The solution: using a command line tool named untrunc https://github.com/ponchio/untrunc , RinCat in the thread fixed the mp4 with it.  I don't have any way to help recover it, but (apologies if your mentions are already flooded with this) for future recording I understand Matroska containers are typically saved progressively, and so will corrupt less if interrupted? @Snapai Thanks, and yes, lesson learned (the hard way) for the MKV workflow 😅 @davidrevoy if VLC can play it, you're good. You can the export it with VLC. @RinCat @alter_unicorn @RinCat Thanks, it is resolved. @davidrevoy I tried 6 different apps here with no luck. Is this a part of a larger or a chunk of a recording? 91MB is really small for a long video. @michaelkammes Oh yes, it was a tough video file, I also tested ffmpeg/avidemux/vlc and more method found online. Asking on Mastodon was my last desperate attempt. |
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@davidrevoy See if this walkthrough helps. I’ve found that VLC is great at recovery.
https://repairit.wondershare.com/video-repair/mp4-video-repair-tool.html#part3