Raspistill: Some pictures are black
I have a raspberry pi on which I am executing a python script. This script has a while loop with the following statement in it
os.system('sudo raspistill -o img' + str(counter) +'.jpg')
This loop executes a 100 times and is supposed to take a hundred pictures (the counter number is incremented each time a picture is taken). I have verified that this code is working perfectly and the folder contains 100 pictures.
I added a background thread to execute in parallel. As soon as the main program snaps a picture and puts it in a folder, this thread copies this picture into another directory using the following command
os.system('sudo cp ' + sourceFilePath + ' ' + destinationFilepath)
However, with this copying thread on, some of the pictures seem to be completely black (and the size is really small, around 150kb). Does anyone know what is going on?
NOTE: Due to some reason, I have to use the os.system('sudo raspistill -o ') command. I can not use the picamera library
python camera raspberry-pi raspistill
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
add a comment |
I have a raspberry pi on which I am executing a python script. This script has a while loop with the following statement in it
os.system('sudo raspistill -o img' + str(counter) +'.jpg')
This loop executes a 100 times and is supposed to take a hundred pictures (the counter number is incremented each time a picture is taken). I have verified that this code is working perfectly and the folder contains 100 pictures.
I added a background thread to execute in parallel. As soon as the main program snaps a picture and puts it in a folder, this thread copies this picture into another directory using the following command
os.system('sudo cp ' + sourceFilePath + ' ' + destinationFilepath)
However, with this copying thread on, some of the pictures seem to be completely black (and the size is really small, around 150kb). Does anyone know what is going on?
NOTE: Due to some reason, I have to use the os.system('sudo raspistill -o ') command. I can not use the picamera library
python camera raspberry-pi raspistill
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
Is the only purpose of the thread to copy the pictures to other place?,
– Cheche
Nov 15 '18 at 2:00
@Cheche Yes. For some reason, I have to copy the pics to the other place as soon as they get taken by the Camera
– Umar Dastgir
Nov 15 '18 at 2:01
Can't you just store them in the other folderos.system('sudo raspistill -o img' + 'homepics' + str(counter) + '.jpg')?,... seems you're patching some issue with you raspberry making something that won't be efficient at all...
– Cheche
Nov 15 '18 at 2:03
Unfortunately, I can not. Storing at this other location takes a lot more time and I have a time constraint (max time between two pictures should be less than a particular value).
– Umar Dastgir
Nov 15 '18 at 2:09
Ok, understand. What about a queue? The point is thatthreadis not convenient on certain kind of processes because python will still be single-threaded.
– Cheche
Nov 15 '18 at 2:15
add a comment |
I have a raspberry pi on which I am executing a python script. This script has a while loop with the following statement in it
os.system('sudo raspistill -o img' + str(counter) +'.jpg')
This loop executes a 100 times and is supposed to take a hundred pictures (the counter number is incremented each time a picture is taken). I have verified that this code is working perfectly and the folder contains 100 pictures.
I added a background thread to execute in parallel. As soon as the main program snaps a picture and puts it in a folder, this thread copies this picture into another directory using the following command
os.system('sudo cp ' + sourceFilePath + ' ' + destinationFilepath)
However, with this copying thread on, some of the pictures seem to be completely black (and the size is really small, around 150kb). Does anyone know what is going on?
NOTE: Due to some reason, I have to use the os.system('sudo raspistill -o ') command. I can not use the picamera library
python camera raspberry-pi raspistill
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
I have a raspberry pi on which I am executing a python script. This script has a while loop with the following statement in it
os.system('sudo raspistill -o img' + str(counter) +'.jpg')
This loop executes a 100 times and is supposed to take a hundred pictures (the counter number is incremented each time a picture is taken). I have verified that this code is working perfectly and the folder contains 100 pictures.
I added a background thread to execute in parallel. As soon as the main program snaps a picture and puts it in a folder, this thread copies this picture into another directory using the following command
os.system('sudo cp ' + sourceFilePath + ' ' + destinationFilepath)
However, with this copying thread on, some of the pictures seem to be completely black (and the size is really small, around 150kb). Does anyone know what is going on?
NOTE: Due to some reason, I have to use the os.system('sudo raspistill -o ') command. I can not use the picamera library
python camera raspberry-pi raspistill
python camera raspberry-pi raspistill
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
asked Nov 15 '18 at 1:48
Umar DastgirUmar Dastgir
10511
10511
Is the only purpose of the thread to copy the pictures to other place?,
– Cheche
Nov 15 '18 at 2:00
@Cheche Yes. For some reason, I have to copy the pics to the other place as soon as they get taken by the Camera
– Umar Dastgir
Nov 15 '18 at 2:01
Can't you just store them in the other folderos.system('sudo raspistill -o img' + 'homepics' + str(counter) + '.jpg')?,... seems you're patching some issue with you raspberry making something that won't be efficient at all...
– Cheche
Nov 15 '18 at 2:03
Unfortunately, I can not. Storing at this other location takes a lot more time and I have a time constraint (max time between two pictures should be less than a particular value).
– Umar Dastgir
Nov 15 '18 at 2:09
Ok, understand. What about a queue? The point is thatthreadis not convenient on certain kind of processes because python will still be single-threaded.
– Cheche
Nov 15 '18 at 2:15
add a comment |
Is the only purpose of the thread to copy the pictures to other place?,
– Cheche
Nov 15 '18 at 2:00
@Cheche Yes. For some reason, I have to copy the pics to the other place as soon as they get taken by the Camera
– Umar Dastgir
Nov 15 '18 at 2:01
Can't you just store them in the other folderos.system('sudo raspistill -o img' + 'homepics' + str(counter) + '.jpg')?,... seems you're patching some issue with you raspberry making something that won't be efficient at all...
– Cheche
Nov 15 '18 at 2:03
Unfortunately, I can not. Storing at this other location takes a lot more time and I have a time constraint (max time between two pictures should be less than a particular value).
– Umar Dastgir
Nov 15 '18 at 2:09
Ok, understand. What about a queue? The point is thatthreadis not convenient on certain kind of processes because python will still be single-threaded.
– Cheche
Nov 15 '18 at 2:15
Is the only purpose of the thread to copy the pictures to other place?,
– Cheche
Nov 15 '18 at 2:00
Is the only purpose of the thread to copy the pictures to other place?,
– Cheche
Nov 15 '18 at 2:00
@Cheche Yes. For some reason, I have to copy the pics to the other place as soon as they get taken by the Camera
– Umar Dastgir
Nov 15 '18 at 2:01
@Cheche Yes. For some reason, I have to copy the pics to the other place as soon as they get taken by the Camera
– Umar Dastgir
Nov 15 '18 at 2:01
Can't you just store them in the other folder
os.system('sudo raspistill -o img' + 'homepics' + str(counter) + '.jpg')?,... seems you're patching some issue with you raspberry making something that won't be efficient at all...– Cheche
Nov 15 '18 at 2:03
Can't you just store them in the other folder
os.system('sudo raspistill -o img' + 'homepics' + str(counter) + '.jpg')?,... seems you're patching some issue with you raspberry making something that won't be efficient at all...– Cheche
Nov 15 '18 at 2:03
Unfortunately, I can not. Storing at this other location takes a lot more time and I have a time constraint (max time between two pictures should be less than a particular value).
– Umar Dastgir
Nov 15 '18 at 2:09
Unfortunately, I can not. Storing at this other location takes a lot more time and I have a time constraint (max time between two pictures should be less than a particular value).
– Umar Dastgir
Nov 15 '18 at 2:09
Ok, understand. What about a queue? The point is that
thread is not convenient on certain kind of processes because python will still be single-threaded.– Cheche
Nov 15 '18 at 2:15
Ok, understand. What about a queue? The point is that
thread is not convenient on certain kind of processes because python will still be single-threaded.– Cheche
Nov 15 '18 at 2:15
add a comment |
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Is the only purpose of the thread to copy the pictures to other place?,
– Cheche
Nov 15 '18 at 2:00
@Cheche Yes. For some reason, I have to copy the pics to the other place as soon as they get taken by the Camera
– Umar Dastgir
Nov 15 '18 at 2:01
Can't you just store them in the other folder
os.system('sudo raspistill -o img' + 'homepics' + str(counter) + '.jpg')?,... seems you're patching some issue with you raspberry making something that won't be efficient at all...– Cheche
Nov 15 '18 at 2:03
Unfortunately, I can not. Storing at this other location takes a lot more time and I have a time constraint (max time between two pictures should be less than a particular value).
– Umar Dastgir
Nov 15 '18 at 2:09
Ok, understand. What about a queue? The point is that
threadis not convenient on certain kind of processes because python will still be single-threaded.– Cheche
Nov 15 '18 at 2:15