Closed baesek closed 2 years ago
I don’t think this is directly related. There may be SOME way to do what you want, but I don’t believe raspiraw has anything at all to do with motion vectors. It just reads bitmaps.
So you can’t use raspiraw I think, for this.
But it’s an interesting idea. Maybe the existing video code (not raspiraw) could be tweaked to increase framerate.
14 sep. 2022 kl. 09:37 skrev Flub @.***>:
Hi, sorry that I ask my question here, in the issues, i did not find any other option. I am actually searching for ways to get the motion_vectors of the pi camera with the smallest possible latency for an interactive art installation.
I already asked here: waveform80/picamera#725
I wonder if I can use this (fork-raspiraw) to modify one sensor modes framerate of either the pi camera v1 or v2 and then use picamera as an option to read the motion_vector data with the modified sensor mode? How does it work? Does the Data stay in the register after modification with raspiraw command or do I have to run the command everytime after booting to get the modified framerate? If I understood right it is also possible to just record every second line of the image to save data, would that help in getting the motion_vector / macroblock data as fast as possible? I just bought a camera v2, is this gonna be better than the v1 version for this, or does it make no difference? I already build a housing for the v1 camera, thats why i am asking.
Thank you for any help, this project made my hope grow that it is possible to have nice realtime motion_detection for the art installation.
best, Paul
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Mh. I just read this from 2014 https://www.raspberrypi.com/news/vectors-from-coarse-motion-estimation/ which is implemented here (it uses raspivid with the -x parameter). https://github.com/YggdrasiI/RPIMotionDetection/blob/f07e53ff9777c6ecb81319fd06e8f631c3354b0e/apps/raspicam/start I am still not 100% sure, but i have the feeling that your project could also be somehow used to get the motion vector data at high framerates and thus with low latency. Isn't it?
I learned from 6by9 that motion vectors can only be retrieved with legacy camera stack at that time. Perhaps libcamera can as well. Definitely raspiraw cannot, it just captures raw frames.
Hi, sorry that I ask my question here, in the issues, i did not find any other option. I am actually searching for ways to get the motion_vectors of the pi camera with the smallest possible latency for an interactive art installation.
I already asked here: https://github.com/waveform80/picamera/issues/725
I wonder if I can use this (fork-raspiraw) to modify one sensor modes framerate of either the pi camera v1 or v2 and then use picamera as an option to read the motion_vector data with the modified sensor mode? How does it work? Does the Data stay in the register after modification with raspiraw command or do I have to run the command everytime after booting to get the modified framerate? If I understood right it is also possible to just record every second line of the image to save data, would that help in getting the motion_vector / macroblock data as fast as possible? I just bought a camera v2, is this gonna be better than the v1 version for this, or does it make no difference? I already build a housing for the v1 camera, thats why i am asking.
Thank you for any help, this project made my hope grow that it is possible to have nice realtime motion_detection for the art installation.
best, Paul