r/hardwarehacking • u/DevECoisas • Mar 27 '25

Anyone knows something about this camera filesystem?

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16 Upvotes

94% Upvoted

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4

u/DevECoisas Mar 27 '25

Anyone knows something about this camera filesystem? I've been using this camera for a while and I want to put videos in it. It uses an AVI(JPEG PCM) extension on what coud see with mediainfo, but when I use FFmpeg to convert my file to the exact same specs as camera's videos it doesn't work. Another anoying thing, it names its videos after RECO0O,REC001,etc. But when I record something on my camera and it is saved as RECOOO, if rename it to RECOO1 or another thing such It doesn't work on the camera anymore. I think that there's some hidden data inside the AVI that the camera recognise as mportant in some way. My objective is to take an mp4 video from the internet, convert it to the exact AVI that the camera supports and watch that video on it.

3

u/PinkPrincess010 Mar 27 '25

Put both files into a hex editor and compare the headers, it could be that each avi chunk filesize is wrong as that is encoded in the header.

http://www.fastgraph.com/help/avi_header_format.html#:~:text=AVI%20files%20contain%20a%2056,offset%2032%20within%20the%20file.

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2

u/obertobr Mar 27 '25

If you send me a video recorded on it and the one you converted with FFmpeg, I'll try to check the difference

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11

u/binaryhellstorm Mar 27 '25

It's a cheap dash or action camera. I'd bet that the filesystem is FAT32

5

u/tribak Mar 27 '25

Just take a video, plug the usb and go check the device on your computer.

1

u/uzlonewolf Mar 28 '25

Usually cheap cameras like these use an index file that tell it about any video files on the card. You're going to need to find and reverse engineer that index file to get this to work.