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Walmart surveillance video codec SN40 trouble

This discussion thread has 12 messages.

#1
I am looking to play back some surveillance video from a walmart security cam and GSpot says that it is SN40 and so does VLC. Gspot will go through all 3 steps and play it in the "test" window. But this is a 2 hour video that I need to sift through and GSpot isn't very practical.

Gpsot obviously says the codec is there but VLC will not play the video. It goes along like it's playing but there is no video (the file has no audio at all).

This is the case on several computers... anyone have any ideas?

I haven't tried in Linux yet but it certainly is an option for me.

This is VERY important video and I'd appreciate any help getting this going ASAP.

Thanks,
Gilligan
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#2
Try WinFF - the portable version is good.
I converted an AVI that had this codec ok.

Load the file.
Convert to mp4.
Preset, mp4 fullscreen and good luck.

http://www.videohelp.com/tools/WinFF
#3
Nice util... I'm gonna pass this on to my wife as I think she can put it to some good use but it didn't work for this file. :(
#4
Ok... I even tried on a mac... I'm willing to give up $5 bucks to someone's paypal if someone can hook me up with a way to play it or a converted version in a "normal" codec.

I've put the file up on one of my servers:
http://www.abnormaltshirts.com/sn40.avi

Please help.
#5
Try the Videohelp site.
http://forum.videohelp.com/
#6
ffmpeg might be able to help.. trouble is.. security cam systems generally use proprietary software applications to access the data .. so it's more likely you will need to get back to wallyworld to find out what they used to make the video, and then buy it... chances are it's full of drm type rubbish.. and very likely being proprietary it's not a "standard" implementation of the codec.. a typical trick is to swap the audio and video streams (yes.. even if there is no audio there will still be a stream location list for it)

linux and ffmpeg would be a best try attempt.. but be prepared to do a lot of searching and experimenting to find a way to convert it to a different format or something.. IF it's evidence, conversion or tampering with it in any way will make it inadmissable as evidence.. in which case just give it to the courts or lawyer and let them work it out.



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#7
The thing is, is that gspot will render and play the video in it's built in little preview function.

Just vlc will only just say it's playing but render no video.
#8
Well, after reading around I gave VirtualDub a whirl and boom!

It was playing fine. So I found the part I needed and I'll just capture what I need in uncompressed.

Thanks, hopefully someone else will find this helpful!
#9
OJOsoft Total Video Converter works on Wal-Mart SN40 surveillance video. I used version 2.6.2.0207
#10
Originally posted by Gilligan8:
Well, after reading around I gave VirtualDub a whirl and boom!

It was playing fine. So I found the part I needed and Ill just capture what I need in uncompressed.

Thanks, hopefully someone else will find this helpful!
I tried that as soon as I read this and it didnt work. I then proceeded to install a bunch of video programs and codec packages. I tried it again later that evening, and it did work exactly as you said. But I dont know how to capture. File>export>raw video gave me a 16gb file with no extension which did not play on ordinary players.

So I save(d) as... an avi (yes, I know its already an avi), and was able to put THIS avi into WinFF to export as a fullscreen mp4.

I dont know which codec package did the trick, but I suspect the divx plus converter.
#11
Originally posted by Gilligan8:
Well, after reading around I gave VirtualDub a whirl and boom!

It was playing fine. So I found the part I needed and Ill just capture what I need in uncompressed.

Thanks, hopefully someone else will find this helpful!
I tried that as soon as I read this and it didnt work. I then proceeded to install a bunch of video programs and codec packages, including Verint Video Solutions Codecs and Divx.

I tried VirtualDub again after downloading all those packages, and it did work exactly as you said. However, File>export>raw video gave me a 16gb file with no extension which did not play on ordinary players. I didn't (and still don't) know how to capture using VirtualDub.

So what I did was this: Save as... avi (yes, I know its already an avi). Then I was able to put the new avi into WinFF and export the file as a fullscreen mp4 (or MOV, or whatever you want it to be).

However, when I tried to burn to disc on a mac using Final Cut Pro, Compressor and DVD Studio Pro (in that order), the file did not work. I took the mov file that WinFF gave me, put it into Mpeg Streamclip, and created a mov using "export to quicktime > compression: Apple DV/DVCPRO - NTSC" I imported that file into FCP, then "Send to... compressor" then exported as a DVD and put that file into DVD Studio Pro.
This message has been edited since its posting. Latest edit was made on 25 Mar 2011 @ 21:23
#12
Originally posted by grouch2011:
Originally posted by dickdeadly:
Originally posted by Gilligan8:
Well, after reading around I gave VirtualDub a whirl and boom!

It was playing fine. So I found the part I needed and Ill just capture what I need in uncompressed.

Thanks, hopefully someone else will find this helpful!
I tried that as soon as I read this and it didnt work. I then proceeded to install a bunch of video programs and codec packages. I tried it again later that evening, and it did work exactly as you said. But I dont know how to capture. File>export>raw video gave me a 16gb file with no extension which did not play on ordinary players.

So I save(d) as... an avi (yes, I know its already an avi), and was able to put THIS avi into WinFF to export as a fullscreen mp4.

I dont know which codec package did the trick, but I suspect the divx plus converter.

I deal with their videos all the time. If you download the March Network viewer you can watch video from Walmart.
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