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When I run command:
raspivid -t 15000 -o > test_vid.h264
Raspicam's red light stays on, but I only get file test_vid.h264 which size is 0 bytes.
Ras Pi still works fine.
I have googled that raspivid doesn't work properly on Raspberry Pi B+.
Should I get raspivid to work or are there any other programs for Rasbian jessie that I might use to test if my raspicam can record video?
The -o option for raspivid is used to set the output path where you want to record a video but you never set it to anything and instead you try to redirect the stdout stream to a file.
If you want really want to use stdout and pipe it into a file you can use the -o option with a dash. From the documentation:
--output, -o Output filename <filename>.Specify the output filename. If not specified, no file is saved. If the filename is '-', then all output is sent to stdout.
raspivid -t 15000 -o - > test_vid.h264
That should work to record a simple video. However the simplest and most recommended way is to use the command below.
raspivid -t 15000 -o test_vid.h264
-owith redirection (>).-o) and how POSIX shells such as bash redirect output. Linus does a decent job of explaining that in this case. WRT switches, aka. options, most CLI's have a "man page" explaining them that can be accessed with, e.g.,man whatever. The raspicam apps don't have these, but they do have "help" messages that can be invoked with-h. Note that>is a shell feature, not the app's.