Welding videos corrupt

[docomeister]

Been filming with the 200D the other day, and looks like it doesn't like my welding. All the videos that contained welding are corrupt. The others are fine. Any ideas? Happened to you? Could be recovered?

[wisex]

Were your other videos shot on a different day than the welding videos? Did you import files from your SD card onto a computer and then keep shooting without formatting? Generally what a lot of wedding videographers do to ensure that their videos have a minimal chance of corruption is formatting their card after every time their offload/import their files onto a computer, that way they ensure a "clean slate" when they continue recording. I personally haven't ever had a video corrupt when I shoot video on it, but I have had pictures corrupt on me. As for recovery theres this great little guide for potential fixes you could try using VLC! 

https://www.stellarinfo.com/blog/repair-corrupt-video-file-vlc-media-player/

[docomeister]

7 hours ago, wisex said:

Were your other videos shot on a different day than the welding videos? Did you import files from your SD card onto a computer and then keep shooting without formatting? Generally what a lot of wedding videographers do to ensure that their videos have a minimal chance of corruption is formatting their card after every time their offload/import their files onto a computer, that way they ensure a "clean slate" when they continue recording. I personally haven't ever had a video corrupt when I shoot video on it, but I have had pictures corrupt on me. As for recovery theres this great little guide for potential fixes you could try using VLC! 

https://www.stellarinfo.com/blog/repair-corrupt-video-file-vlc-media-player/

Welding film, not wedding film 

All the filming was done in the same location, in the interval of a couple hours. There were vids that contained welding, which are all corrupt, and some that didn't, which are all fine, and were recorded intermitently, in a mixed order. As I said, the select few vids that contained welding went corrupt, and all the others are fine. It's like the electric field generated by the arc welding messed up the files. It is obvious that the welding itself does stuff to the camera.

I'm sort of not surprised, but I'd like to know if this happened to anyone else, if anyone might have an explanation, or if anyone figured a way to film welding scenes. I was actually thinking to mount the camera in a metal cage (think it's supposed to be called a faraday cage in this instance), to see if I can get footage like that.

Regarding the SD card formatting, no I never reformatted it to get a "clean slate" and I don't personally believe this matters. But don't quote me on this, I'm not a pro photographer nor an IT specialist to claim that it surely doesn't make a difference, I'm just using my common sense to assume it doesn't make much of a difference 

[wisex]

5 hours ago, docomeister said:

Welding film, not wedding film 

Oh I know you meant welding in your post, I was just refering to  wedding photographers XD 

4 hours ago, docomeister said:

As I said, the select few vids that contained welding went corrupt, and all the others are fine. It's like the electric field generated by the arc welding messed up the files. It is obvious that the welding itself does stuff to the camera.

Oh wow I never considered that, if thats the case try shooting with a longer lens so that you're not so close to the welder to prevent this problem? If you have the budget you could try shooting with something like the 100mm Canon macro lens which is really pricey, but its a very good lens. Or if you wanna try something "cheaper" maybe try this 105 mm macro sigma lens?

 

5 hours ago, docomeister said:

I'm sort of not surprised, but I'd like to know if this happened to anyone else, if anyone might have an explanation, or if anyone figured a way to film welding scenes. I was actually thinking to mount the camera in a metal cage (think it's supposed to be called a faraday cage in this instance), to see if I can get footage like that.

Yea I never knew welding was capable of creating an electric field. Maybe try experimenting with it? shoot a 5 second video with the welder on 15 feet away, then 10 feet, then 5 feet, then shoot at the distance you normally shoot and see if the videos get corrupted, and just to be consistent take a laptop and off load every 5 second video every time you shoot it. If we see that the video does get corrupted as you get closer to the welding scene, because from what I've found reading around so far is that (like you said) welding (or arc welding in the other posts I've found) creates an electro magnetic pulse that can and will interfere with electronics. So if we find that this is the case with your videos then you probably will have to shoot with the 100mm macro lens so that you can be a safe distance and still be able to get some clean videos of the sparks flying and stuff

 

5 hours ago, docomeister said:

Regarding the SD card formatting, no I never reformatted it to get a "clean slate" and I don't personally believe this matters. But don't quote me on this, I'm not a pro photographer nor an IT specialist to claim that it surely doesn't make a difference, I'm just using my common sense to assume it doesn't make much of a difference 

no yea I totally get you, formatting is generally an extra step to make "extra sure" that nothing goes wrong.

[docomeister]

On 3/16/2019 at 6:12 PM, wisex said:

Maybe try experimenting with it?

That's pretty much the point of this post, I wanted to see if anyone had this experience or knows more about this matter. I don't want to experiment with my brand new 200D and electric fields  Atm I won't be buying new lenses, but to be fair, the camera was pretty close to the business (<3m). I don't weld much, and welding has nothing to do with my everyday life, but I might have the opportunity to try again next month. Will keep a safer distance, but I really don't want to fry my camera

[Egg-Roll]

My guess is the electromagnetic fields since the card was not protected from them. The worst they likely would have done to the camera would have been to crash it or turn it off, I don't think any welding type would be strong enough (unless you stupidly put the camera inches away) to destroy a camera if it was farther away than you or equal distance.

 

If you are not willing to buy a new lens you can always try this little guy out: http://www.kenkoglobal.com/photo/lens_accessories/teleplus/teleplus_hd_dgx_20x_canon.html

https://www.amazon.com/Kenko-2X-Teleplus-Element-Digital/dp/B0035WTSCG

Tho if I remember correctly it also messes around with your focal length as well and auto focus may or may not work properly (I forget now, I rarely use it)