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Chronos => Chronos User Discussion => Topic started by: clkdiv on May 18, 2020, 02:30:15 PM

Title: Videos saved but gone
Post by: clkdiv on May 18, 2020, 02:30:15 PM
Hello,

today I recorded some clips to a SSD connected via esatap. I saved as cinemadng. Now the camera seemed to save normally, I saw the frames being counted while saving.

When home again, none of the clips could be found on the disk. I recorded something again, as a test, and now the clip was saved.

Now I wonder how this might happen. Could it be, that the harddisk-handle had been lost after the camera has been booted? And could it be that the frames had been written into nirwana?

With regards to this: There was an announcement that it would be possible in future releases to review already recorded clips within the new GUI. When will this might become true, any guesses? Thanks!
Title: Re: Videos saved but gone
Post by: sanjay on May 21, 2020, 10:50:24 AM
Hi clkdiv,

Sorry for any inconvenience that may have caused. Do you remember approximately how many frames you had attempted to save?

I have a similar thought about it as you do.. Clicking "Safely Remove" in Play->Settings would have made the proper calls to the OS to first flush any pending buffers to disk before removal. While the chances of a save not occurring without first doing this are slim, it is still a possibility.

We do still have the recorded clip review screen in our software engineering task backlog, but I anticipate it to be a fairly lengthy undertaking to implement into the video system, so I can't promise a timeline for now.
Title: Re: Videos saved but gone
Post by: clkdiv on May 25, 2020, 01:31:39 PM
Hello and thanks for the answer. I understand it takes time to implement the "replay" function, but in the new GUI there already is this listbox that will show the files on the media, right? For now it would be great if this listbox at least could show the content of the media, just the list of files, so one could see, if anything has changed. I am now working with the cam with esatap and everything is fine, nevertheless it would be great to have such fundamental optical reassurance... It should be easy to implement such "files on device"-list, no?

Thanks, Martin 
Title: Re: Videos saved but gone
Post by: tesla500 on May 26, 2020, 01:01:26 AM
Hey Martin,

I had thought of a few things to check here, just to cover all bases.


In addition to the file browser, another safety check that could be relatively easily added is to have the API check that the file was successfully written and is a reasonable size, and throw a warning if something doesn't seem right.

David
Title: Re: Videos saved but gone
Post by: clkdiv on May 26, 2020, 03:08:38 PM
Hello David,

actually I really both had an SD card and a SSD disk connected, but I checked both. ALso, the fact that the files were written with 12fps as cinemadng seems a hint that it was the SSD. It has only one partition. Since it was a real test with no serious data I don't care for the lost files, but I think sort of safety check really would be nice!

Best regards! Martin.
Title: Re: Videos saved but gone
Post by: allgona on July 09, 2020, 12:27:08 AM
I ran into a similar problem today using an SD card. I think the issue was that I inadvertently had a "\" in the file name - what I assume is an unacceptable character. My story is the same, the camera acted like it saved normally, didn't throw a warning, and I didn't realize my mistake until I put the card into my computer and realized the file wasn't there. If there were a confirmation that the file saved, or a way to show files in the current folder, it would be very useful in my opinion. Thanks!
Title: Re: Videos saved but gone
Post by: NiNeff on July 09, 2020, 07:23:54 AM
I ran into a similar problem today using an SD card. I think the issue was that I inadvertently had a "\" in the file name - what I assume is an unacceptable character. My story is the same, the camera acted like it saved normally, didn't throw a warning, and I didn't realize my mistake until I put the card into my computer and realized the file wasn't there. If there were a confirmation that the file saved, or a way to show files in the current folder, it would be very useful in my opinion. Thanks!
The file might still be there and recoverable using any system other than windows to look for it. If you don't want to install Linux or don't have a MAC use a live System booted from USB.
Title: Re: Videos saved but gone
Post by: allgona on July 09, 2020, 11:07:39 PM
That was a good thought. I tried from Live Boot running Ubuntu, but still couldn't find the lost video files. Thanks though!