Raspberry Pi with OpenCV

All,

In my electronics club in college we are using the Raspberry Pi Camera with OpenCV trying to use the video to store to a location and view the video that was recorded on a laptop that is connected via Ethernet cable. When we go to compile and run the program that does this we are getting and error that it won't open the output video. It should be an AVI video and going through PuTTy it should be able to play that video but it's not. We tried using V4L2 driver for the camera which is 264 video format. Is there anyway we can convert it that it will play through PuTTy or is there other drivers out there that would actually record in AVI format?

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0 shabaz over 10 years ago

Hi Tyler,

I didn't completely understand the issue, but PuTTY only provides a text interface, and trying to launch any graphics or video programs remotely using PuTTY won't work.
The solution is to transfer the video file (using SFTP for example) to your laptop, and then double-click it to play it. The latter is guesswork if it will play, I don't have an
RPI camera nor tried this, but definitely PuTTY won't allow you to play video and the usual way would be to transfer the file across.
I hope this helps!
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0 gtrplyer16 over 10 years ago in reply to shabaz

I just checked it looks like we are trying to open it with pscp. It works with still pictures however not video.
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0 shabaz over 10 years ago in reply to gtrplyer16

I see, PSCP is the file transfer method, so that should transfer any file across (picture or video or anything else). So, presuming you have transferred the file, it sounds like the file itself is the issue or is not recognised by the laptop. Or it could be a file naming issue.
What happens if you double-click, what exactly is the error message you see?
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0 gtrplyer16 over 10 years ago in reply to shabaz

Nothing is saving to click on. On PuTTy while remote accessing the Pi we run the program and on the Pi terminal we it set to reply "Can't open the output video" if something went wrong so nothing is being transferred to the laptop. At least nothing that we can see. So it's like it is recording the video then can't save or transfer it and then gets deleted or lost.
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0 gtrplyer16 over 10 years ago in reply to shabaz

Nothing is saving to click on. On PuTTy while remote accessing the Pi we run the program and on the Pi terminal we it set to reply "Can't open the output video" if something went wrong so nothing is being transferred to the laptop. At least nothing that we can see. So it's like it is recording the video then can't save or transfer it and then gets deleted or lost.
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0 shabaz over 10 years ago in reply to gtrplyer16

Can you copy and paste the text you type into PuTTY and the response you see?
It could be that the program you're running is not intended to record, or has some command line switch to disable trying to bring up (say) an X-window. You can't bring up a window because PuTTY can't do that - the underlying protocol cannot do this. So you need to execute the program with the switches to only dump to file. It sounds like the program is not doing this.
In general it is far easier to debug if we can see the specific text that was typed and the response.
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0 gtrplyer16 over 10 years ago in reply to shabaz

I am not currently able to show you the text that is coming up, but the other club member will be in around 2:30 PM (it is currently 11:00 AM here) and will communicate with you. Thank you!
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