Hello everyone,
we use Raspberry Pi for teaching operating system fundamentals, and one of the first thing that we show to students is unix's "everything is a file" paradigm. In that sense students were using (for years) the trick to to capture JPEG image from the device which corresponded to raspberry Pi camera (technically, it was a sequence of MJPG frames, but most jpeg viewers were fine with it, showing the first one). Suddenly this does not work anymore and does not even suggest that MJPG format or h.264 are supported.
What happened and when?
Note: I am not seeking for ways to capture JPEG from raspicam, thanks. I am asking this here, because internet is awash with suggestions to use ffmpeg, etc... I am asking if there is possibility to capture JPEG (or h264) directly from /dev/video0 anymore. I remember that this DID work for years.
Janez.
we use Raspberry Pi for teaching operating system fundamentals, and one of the first thing that we show to students is unix's "everything is a file" paradigm. In that sense students were using (for years) the trick to
Code:
dd if=/dev/video0 of=image.jpg bs=4M count=1Code:
/dev/video0Code:
v42l-ctl -D /dev/video0 --list-formatsWhat happened and when?
Note: I am not seeking for ways to capture JPEG from raspicam, thanks. I am asking this here, because internet is awash with suggestions to use ffmpeg, etc... I am asking if there is possibility to capture JPEG (or h264) directly from /dev/video0 anymore. I remember that this DID work for years.
Janez.
Statistics: Posted by jpers — Mon Mar 25, 2024 6:11 pm