Author Topic: Problems with exporting video to SD card  (Read 171 times)

A.Angelov

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Problems with exporting video to SD card
« on: July 01, 2017, 10:35:36 AM »
Hello,

I have been experiencing some problems with exporting the videos from Chronos to a SD card. The videos are perfectly smooth in the playback, but once exported to a SD card they are sometimes not smooth (glitching /missing frames). I tried 3 different SD cards (from a very old 2GB card to a 64GB UHS class 3 card - 95MB/s) but the problem persists. I also formated them in FAT32 and NTFS systems but Chronos seems to work only with FAT32. I added several examples so that you can see what I am talking about:

First example: https://drive.google.com/file/d/0Bz3D_Jwk70plMXFFS3h0Q3F6LWc/view?usp=sharing
Here you can see how there is a missing frames just when the top of the match starts falling - this was recorded to an old 2 GB SD card

Second example: https://drive.google.com/file/d/0Bz3D_Jwk70plWVlISGh5RFpHbWs/view?usp=sharing
Here for some reason the frames skipping is a bit more dramatic. See from 0:39 to 0:44 and from 3:11 to 3:13
(it must be the most boring video taken with a Chronos camera but it is just so that you can see the problem). This was recorded to the new very fast 64GB SD card.

Does someone has any clue what is causing the problem and how it can be fixed?

Thanks

« Last Edit: July 01, 2017, 10:44:10 AM by A.Angelov »

tesla500

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Re: Problems with exporting video to SD card
« Reply #1 on: July 01, 2017, 12:40:55 PM »
What brands of cards have you used? I've had basically no problems with Lexar Class 10 (UHS class 1) cards.

If you turn the bitrate down in save settings, does the problem still occur?

A.Angelov

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Re: Problems with exporting video to SD card
« Reply #2 on: July 01, 2017, 01:12:20 PM »
Thank you for the fast answer David  :D

I forgot to mention that I tried to increase and decrease bit rates, but it didnīt seemed to influence the results at all.

All my 3 SD cards are SanDisk.

I kept doing some tests after my first message and for some reason I no longer have any problem with the UHS 3 card. No frames skipping at all. I donīt have any idea what the problem was  but it seems to be solved.