I reformatted the drive so sda2 is raw. Now I'm trying to copy a recording
from there. I'm not sure what you meant by:
run https://git.elphel.com/Elphel/eyesis4pi-393-gui/blob/master/
footage_downloader/split_mov.php from inside the directory with image.bin

Also, when I use the 14MPx sensors with nand, the cameras don't always show
up. Sometimes only one shows up or none of them do. Any ideas what might be



On Fri, Apr 6, 2018 at 6:11 PM, Oleg <support-list@support.elphel.com>

> Mohamed,
> I formatted the drive using ip_address/format_disk.php. This created sda1
>> and raw sda2. Then I used mkfs.ext4 /dev/sda2 to format the 2nd partition.
>> I made a directory sda2 in mnt and mounted /dev/sda2 there. I can copy
>> files from /mnt/sda2 using scp. Is this the right way? I'm not sure why
>> I need 2 partitions.
> 2 partitions are used for 'fast recording'. Not having a file system on
> sda2 partition saves some time to perform writes, and also should reduce
> the wearing out of SSD. And ext4 sda1 partition is intended to store
> information where to start/continue recording from (camogm.disk).
> You don't have to use it if normal recording works. In this case you can
> have only a single partition - use fdisk to repartition.
> But if you increase the image quality normal recording might be too slow -
> you can test this - in camogm gui click on the 'show buffers' and run
> recording.
> When I use the Apple Quicktime Movie format, I get videos of the frames
>> from each port alternating. Is there a way to separate them so I get a
>> video for each port?
> Camogm does not have an option to store different ports into separate
> files. Though it's possible to implement but will probably slow down
> recording.
> You can separate them on your PC.
> split_mov.php which I mentioned before - does splitting and naming files
> as <timstamp>_<port>.<ext> Then they can be combined back to movs with
> ffmpeg, for example.
> For image format, COLOR is set as 0. Does that matter?
> JP4 is a kind of a raw image format we implemented - see this article
> <https://wiki.elphel.com/wiki/JP4>.
>> By the way, I was curious if it's possible to use 14 MPix sensors with
>> nand?
> Yes. I didn't include the device tree for nand for 14MPx. Now it's
> here(devicetree.dtb)
> <https://community.elphel.com/files/393/20180406/nand/mt9f002/>.
> Best regards,
> Oleg Dzhimiev
> Electronics Engineer
> phone: +1 801 783 5555 x124
> Elphel, Inc.
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