![]() To make matters worse, Grau seems to have abandoned all development (at least on the Mac side of things) around 2017 or so. Version 1.5 is way too old, so there is only the freeware version to work with. While the last few links to Grau's Video Repair Tool 1.5 are still working, there's a problem with using it under macOS Catalina (10.15): from Catalina onwards, only 64bit apps will run. although I had no luck in my case, since your page is so often visited, I thought I'd add a few tips for 2019. seven years later, just like so many others, I came across your page as well, and attempted to fix a broken video. You should search for the filename that was originally used to publish it: "videorepair1.5.zip" The official site has removed it long ago and various links to copies become invalid after some time. P.S.: obviously the free version of Grau's Video Repair Tool is hard to come by these days. at least with the broken videos created by my phone's camera app in case it crashes for some reason before the recording is finished) (P.S.: the free version pretty much works for me. Obviously the tool has seen quite a few versions since then, so if the free version does not work, you can still try the current demo version and if it works, you can buy a license for recovery of 5 video files. However the tool's earlier versions were freeware and if you happen to find a copy online ( direct link), you can still use it. It's a bit costly for the average user, but you can buy the license for the repair of a limited number of videos significantly cheaper. Actually I've found only a single app called Grau's Video Repair Tool. It'd seem that this problem is more widespread and there're lots of apps that can help you fix such broken files. However this won't help you if your moov is missing altogether. There're tools that let you move the moov atom from the end of the file to the start so internet connected players can start playback instantly when they start downloading the file (instead of having to wait til the entire file is downloaded). And you don't know in advance how long the video is going to be so you cannot simply reserve some space for the index at the start of the recording. You only have it, when the recording is finished. The reason for this is simple: while you're recording the video, you don't have the full index yet. So everything that a video player needs to know to be able to play it back. It contains the index of the video and the metadata (like codec, etc.). ![]() The problem is that recorders put the most important part of the video (this so called moov atom) at the end of the video file. If you try to read/analyze it with ffmpeg, it'll tell you that "moov atom not found". they are mostly the same container format). Let's assume your video recorder (phone, camera, etc.) died while recording an MP4 (or MOV or 3GP.
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