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Continuous sequential video file numbering between SDs
2630 26 2020-5-25
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Mirek6
First Officer
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Hi,

When I change SD cards on my Mavic Air 2, the file numbering are reset and start from 1 (on empty card).
Is there a setting in DJI Fly app where I can specify coontinuous numbering instead of reset to 1 every time I change the SD card?
This is important if I do a lot of shots for the same film / theme while using multiple SD cards. When I want to transfer them to the same directory on my I need to rename them.
Video cameras have such settings. Does MAvic Air 2?

Mirek  
2020-5-25
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Labroides
Captain
Flight distance : 9991457 ft
Australia
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The feature is available in DJI Go but for some reason, DJI left it out of DJI Fly.
2020-5-25
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Mirek6
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Labroides Posted at 5-25 06:04
The feature is available in DJI Go but for some reason, DJI left it out of DJI Fly.

How do I request features to be added to DJI Fly?

There are some other features which we used to have in DJI Go 4 which are missing in DJI Fly.
For example: Adjustment of gimbal speed and sensitivity, adjustment of battery warnings levels etc.

Mirek
2020-5-25
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Sean-newbie
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Just as a matter of interest my Mavic Mini appears to be set to continuous.
Does the Air 2 have internal storage? If so could you copy the last image on the out going card to the internal memory, swap the cards and copy the image onto the new card? If so is the file name preserved?
2020-5-25
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Hotrod in Daytona
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As long as I don't format an SD card it seems to be continuous numbering.  I even swapped in an identical SD card and it kept numbering in sequence.
2020-5-25
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Mirek6
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This numbering schema in Mavic Air 2 is a mystery.

I formatted two cards one after the other.
I started recording on card 1 - few clips and than continue on card 2 - few clips. Number sequencing was preserved (numbering did not reset to 1 with second card).

Than I formatted second card and recorded few clips. They randomly started with number 5.
Than I reformatted first card and recorded few cllips. Numbering started from 1.

I cannot find the algorithm DJI uses described in documentation.
Also, there seems to be no option of chosing continuous numbering versus starting from one with every card. In addition there seems to be no option to reset numbering.

Can somebody from DJI please explain the logic of numbering of clips? What can we expect? What is the algorithm DJI uses?  

Mirek
2020-5-25
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DJI Mindy
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Hi Mirek, thanks for your feedback, I will verify the current logic with our engineers and come back to you soon.
2020-5-26
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Hotrod in Daytona
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DJI Mindy Posted at 5-26 04:56
Hi Mirek, thanks for your feedback, I will verify the current logic with our engineers and come back to you soon.

I had basically the same findings.  Formatting seems to be the reset.  My suggestion would be just never reset whether you format or not.
2020-5-26
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Mirek6
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DJI Mindy Posted at 5-26 04:56
Hi Mirek, thanks for your feedback, I will verify the current logic with our engineers and come back to you soon.

Thank you DJI Mindy. I am looking forward to your information.

Mirek
2020-5-26
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Smashey1
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DJI Mindy Posted at 5-26 04:56
Hi Mirek, thanks for your feedback, I will verify the current logic with our engineers and come back to you soon.

Hi Mindy - I'd be interested in the outcome of this too. I seem to have duplicate file names after formatting an SD card in the drone.
2020-6-15
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Rustic17
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Hotrod in Daytona Posted at 5-26 05:20
I had basically the same findings.  Formatting seems to be the reset.  My suggestion would be just never reset whether you format or not.

That doesn't make sense...the other ops say that it's the formatting that causes the reset.  So what I'm hearing from the other ops is don't format if you want the files to be continuous from one sd card to another.
2020-6-15
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Rustic17
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After initially formatting an sd card, I never format again.  After downloading to my PC,  I just select all DCIM photos and vids I don't want (usually all) and delete.  I also have put a Word document on each sd card that includes my contact information.  That gives another opportunity for someone who finds my drone to contact me directly versus them trying to use my FAA registration number (in US we don't have to have the non-flammable (metallic) contact placard on the drone).
2020-6-15
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Labroides
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Rustic17 Posted at 6-15 08:40
That doesn't make sense...the other ops say that it's the formatting that causes the reset.  So what I'm hearing from the other ops is don't format if you want the files to be continuous from one sd card to another.

That doesn't make sense...the other ops say that it's the formatting that causes the reset.  So what I'm hearing from the other ops is don't format if you want the files to be continuous from one sd card to another.
If you put a different card in your drone, the Fly app will start back at 0001 if the card has no other DJI image files on it.
The Fly app has no way to keep the file ordering continuous across different cards.
2020-6-15
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Geebax
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Rustic17 Posted at 6-15 08:51
After initially formatting an sd card, I never format again.  After downloading to my PC,  I just select all DCIM photos and vids I don't want (usually all) and delete.  I also have put a Word document on each sd card that includes my contact information.  That gives another opportunity for someone who finds my drone to contact me directly versus them trying to use my FAA registration number (in US we don't have to have the non-flammable (metallic) contact placard on the drone).

Not a good idea. DJI place a large number of files in hidden directories on the SD card, and your card will either fill up with these if you continue to just delete the files, or it will become slow and unresponsive as it gets fragmented. It is better to format the card relatively often.

2020-6-15
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Rustic17
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I had two new sd cards.  I put one in the MA2 and formatted it.  I took 3 photos and put the card in my Windows 10 desktop.  I immediately got a notification in the lower right hand corner of the screen saying “There is problem with this drive. Scan now to fix it.”  I clicked on the notification box and got this popup.

I red x’d out of this popup and a drive came up in Explorer that had the sd card information.  I went to DCIM>100Media and there were 3 jpeg files numbered 1, 2, and 3.  I deleted these files which is the same as moving them onto the desktop computer.  I then re-inserted the card into the MA3 and took three more photos.  This time when I inserted the card into my desktop I got the same notification but I did not click on it.  After a few seconds the notification disappeared.  I went to the drive which had the card and I had 3 jpeg files numbered 4, 5, 6.  I inserted a new sd card in the MA2, formatted it and took three more photos.  They came up 1, 2, 3.  I re-inserted  the original card in the MA2 after deleting 4, 5, and 6.  I took three photos and they came up 4, 5, 6 instead of the 7, 8, 9 I expected!!!  For some reason I thought the numbering system was built into the card.  No, it’s the MA2 that numbers the photos. I re-inserted the second disk into the MA2 after deleting 1, 2, and 3.  I took three photos and they came up 7, 8 and 9!!!  Yay!!!  Seems like anytime you format a card, the numbering system of the MA2 starts back to 1.  Then, no matter which subsequent card you use, as long as you don’t format using the MA2, the MA2 numbers continuously from the previous card.
2020-6-15
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Geebax
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Rustic17 Posted at 6-15 18:17
I had two new sd cards.  I put one in the MA2 and formatted it.  I took 3 photos and put the card in my Windows 10 desktop.  I immediately got a notification in the lower right hand corner of the screen saying “There is problem with this drive. Scan now to fix it.”  I clicked on the notification box and got this popup.
[view_image]
I red x’d out of this popup and a drive came up in Explorer that had the sd card information.  I went to DCIM>100Media and there were 3 jpeg files numbered 1, 2, and 3.  I deleted these files which is the same as moving them onto the desktop computer.  I then re-inserted the card into the MA3 and took three more photos.  This time when I inserted the card into my desktop I got the same notification but I did not click on it.  After a few seconds the notification disappeared.  I went to the drive which had the card and I had 3 jpeg files numbered 4, 5, 6.  I inserted a new sd card in the MA2, formatted it and took three more photos.  They came up 1, 2, 3.  I re-inserted  the original card in the MA2 after deleting 4, 5, and 6.  I took three photos and they came up 4, 5, 6 instead of the 7, 8, 9 I expected!!!  For some reason I thought the numbering system was built into the card.  No, it’s the MA2 that numbers the photos. I re-inserted the second disk into the MA2 after deleting 1, 2, and 3.  I took three photos and they came up 7, 8 and 9!!!  Yay!!!  Seems like anytime you format a card, the numbering system of the MA2 starts back to 1.  Then, no matter which subsequent card you use, as long as you don’t format using the MA2, the MA2 numbers continuously from the previous card.

Yes. I suspect one of the hidden files on the card contains information regarding which number is next in the sequence. This is why formatting the card resets it to 1. I once tried placing a file on the card with the number of 100, but the system ignored that, and that's why I suspect the number is stored in a hidden file.
2020-6-15
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Mirek L
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Geebax Posted at 6-15 19:08
Yes. I suspect one of the hidden files on the card contains information regarding which number is next in the sequence. This is why formatting the card resets it to 1. I once tried placing a file on the card with the number of 100, but the system ignored that, and that's why I suspect the number is stored in a hidden file.

What Rustic17 said is in conflict with your conclusion.

From Rustic17 experiment it is quite clear that numbering information is kept not on a card but internally with MA2 (since numbering sequence survives card swap).
When one formats card, the numbering is reset and will start from one. If cards are being changed, numbering continues until another format.

MIrek
2020-6-16
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Mirek L
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Rustic17 Posted at 6-15 18:17
I had two new sd cards.  I put one in the MA2 and formatted it.  I took 3 photos and put the card in my Windows 10 desktop.  I immediately got a notification in the lower right hand corner of the screen saying “There is problem with this drive. Scan now to fix it.”  I clicked on the notification box and got this popup.
[view_image]
I red x’d out of this popup and a drive came up in Explorer that had the sd card information.  I went to DCIM>100Media and there were 3 jpeg files numbered 1, 2, and 3.  I deleted these files which is the same as moving them onto the desktop computer.  I then re-inserted the card into the MA3 and took three more photos.  This time when I inserted the card into my desktop I got the same notification but I did not click on it.  After a few seconds the notification disappeared.  I went to the drive which had the card and I had 3 jpeg files numbered 4, 5, 6.  I inserted a new sd card in the MA2, formatted it and took three more photos.  They came up 1, 2, 3.  I re-inserted  the original card in the MA2 after deleting 4, 5, and 6.  I took three photos and they came up 4, 5, 6 instead of the 7, 8, 9 I expected!!!  For some reason I thought the numbering system was built into the card.  No, it’s the MA2 that numbers the photos. I re-inserted the second disk into the MA2 after deleting 1, 2, and 3.  I took three photos and they came up 7, 8 and 9!!!  Yay!!!  Seems like anytime you format a card, the numbering system of the MA2 starts back to 1.  Then, no matter which subsequent card you use, as long as you don’t format using the MA2, the MA2 numbers continuously from the previous card.

Rustic17,

Very interesting. It looks like numbering is kept internally in MA2 (not on the SD card) and gets reset by formatting action.

It would be interesting to see how MA2 handles possible conflict situation. The following experiment.

Experiment 1:
  • Format two SD cards.
  • Insert card one and take 3 pictures: 1, 2, 3
  • Insert card 2 and take 1 picture: 4
  • Format card 2 and remove it (picture 4 is gone and the counter is reset to 1)
  • Insert card 1 and take 1 picture


What is the number of the last picture? It cannot be 1 becaues it would conflict with pictures already there. Is it 4?

Experiment 2:
  • Format two SD cards.
  • Insert card one and take 3 pictures: 1, 2, 3
  • Delete picture 2 (1 and 3 are still on the card)
  • Insert card 2 and take 1 picture: 4
  • Format card 2 and remove it (picture 4 is gone and the counter is reset to 1)
  • Insert card 1 and take 2 pictures.


What are the numbers of the last 2 pictures? 2 and 4? 4 and 5? Something different?

Mirek

2020-6-16
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Rustic17
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I'll leave that experiment to you.  I was getting an "SD Card too slow" message so I bought a 5 pack of 32GB Sandisk Extreme cards.  They are all formatted and have my Word document on them with my contact infromation.  So, basically, I'm set and don't have to do any more formatting.  I like having smaller cards so if I'm on vacation and lose my MA2 or it gets confiscated by the authorities on the last day of the trip I'm only out one day of pics/vids versus the whole trip.
2020-6-16
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Mirek L
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Rustic17 Posted at 6-16 07:20
I'll leave that experiment to you.  I was getting an "SD Card too slow" message so I bought a 5 pack of 32GB Sandisk Extreme cards.  They are all formatted and have my Word document on them with my contact infromation.  So, basically, I'm set and don't have to do any more formatting.  I like having smaller cards so if I'm on vacation and lose my MA2 or it gets confiscated by the authorities on the last day of the trip I'm only out one day of pics/vids versus the whole trip.

Yes - small cards are good idea.
I just had a SanDisk Extreme 128Gb card failure and lost all footage there. Painful.
At least when something gets corrupted on smaller card, the potential loss is smaller.

Mirek
2020-6-16
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sic-o
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DJI Mindy Posted at 5-26 04:56
Hi Mirek, thanks for your feedback, I will verify the current logic with our engineers and come back to you soon.

Hello, Any resolution on this subject? It very annoying to work with this kind of logic. I have to rename files by hand from DJI_0001 to AJI_0001 and BJI_0001Just to keep some sort of order.

And jumping across SD and internal is a pain. It is really great to have internal memory when you forget the SD in your card reader, but then again you always get the initial sequence from 0001 every time.
2020-10-25
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MySky
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Hello,

A good workaround for me is, if the card gets nearly full, i copy all pics and videos to my tablet or pc or where ever and delete them after on the card via fly app except the last one.
On a new and empty card i take one  picture, rename it after with the last file number +1 of the last i have taken before and the MA2 will continue counting  up as usual.
2020-10-26
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InsaneDiego
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MySky Posted at 10-26 11:08
Hello,

A good workaround for me is, if the card gets nearly full, i copy all pics and videos to my tablet or pc or where ever and delete them after on the card via fly app except the last one.

That's exactly what I do. My Nikon cameras remember the sequence, the Mavic drone doesn't. So I always have the last file on the card to keep the sequence intact.
2020-10-26
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djiuser_VU9CoJgfOVyE
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DJI Mindy Posted at 2020-5-26 04:56
Hi Mirek, thanks for your feedback, I will verify the current logic with our engineers and come back to you soon.

Guys...this is retarded. ANY serious digital camera BY DEFAULT uses continuous numbering whether a card is formatted or not. That's to avoid overwriting older files with the same filename when copying images and videos to a hard drive. I just lost my first 10 videos because of this ridicolous setting!
2021-8-8
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cleamon
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Geebax Posted at 2020-6-15 18:11
Not a good idea. DJI place a large number of files in hidden directories on the SD card, and your card will either fill up with these if you continue to just delete the files, or it will become slow and unresponsive as it gets fragmented. It is better to format the card relatively often.

I just looked at my primary SD card that I've been using for months.  NO HIDDEN FILES.  NO HIDDEN DIRECTORIES.
2021-8-8
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alloffroad
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DJI!!!  Any update on this? it's very very annoying and already lost me files as I overwrote existing files after formatting
2021-11-24
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Geebax
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burp burp burp

2021-11-24
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