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picamera_basic_advanced_recipes/18461_31_0.txt | # Saved searches | |
picamera_basic_advanced_recipes/sshx11forwardingprob_0_0.txt |
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picamera_basic_advanced_recipes/18461_77_0.txt | Any suggestion would be highly appreciated! | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_45_0.txt | [ 
](/users/414443/annamp/) [ AnnaMP ](/users/414443/annamp/) ( 2019-01-24
06:56:32 -0600 ) edit | |
picamera_basic_advanced_recipes/18461_127_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/picamera_basic_recipes_10_0.txt | ## 3.10. Recording video to a stream ¶
This is very similar to Recording video to a file :
from io import BytesIO
from picamera import PiCamera
stream = BytesIO()
camera = PiCamera()
camera.resolution = (640, 480)
camera.start_recording(stream, format='h264', quality=23)
... | |
picamera_basic_advanced_recipes/18461_157_0.txt | * 👍 18 reactions | |
picamera_basic_advanced_recipes/18461_29_0.txt | Include my email address so I can be contacted | |
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picamera_basic_advanced_recipes/18461_226_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_213_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_22_0.txt |
Things I have tried (to no avail): | |
picamera_basic_advanced_recipes/18461_273_0.txt | It doesn't seem to work on my system (WSL ubuntu) ！ | |
picamera_basic_advanced_recipes/18461_212_0.txt | * 👍 2 reactions | |
picamera_basic_advanced_recipes/18461_177_0.txt | --- | |
picamera_basic_advanced_recipes/18461_267_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/18461_68_0.txt | I have opencv as an external dependency that I compile from source like this: | |
picamera_basic_advanced_recipes/18461_307_0.txt | ### | |
picamera_basic_advanced_recipes/18461_225_0.txt | [ 
](/reunanen) | |
picamera_basic_advanced_recipes/18461_228_0.txt | ### | |
picamera_basic_advanced_recipes/18461_24_0.txt | Search | |
picamera_basic_advanced_recipes/18461_118_0.txt | Member | |
picamera_basic_advanced_recipes/18461_146_0.txt | --- | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_58_0.txt | I must say that I don't know Mac install procedure. Using cmake you can set
python path cmake -D | |
picamera_basic_advanced_recipes/18461_73_0.txt |
libgtk2 is definitely installed: | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_15_0.txt | ## 4.15. Custom encoders ¶
You can override and/or extend the encoder classes used during image or video
capture. This is particularly useful with video capture as it allows you to
run your own code in response to every frame, although naturally whatever code
runs within the encoder’s callback has to be reasonably q... | |
picamera_basic_advanced_recipes/18461_367_0.txt | Assignees | |
picamera_basic_advanced_recipes/18461_184_0.txt | ### | |
picamera_basic_advanced_recipes/18461_53_0.txt | Closed | |
picamera_basic_advanced_recipes/18461_235_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/18461_110_0.txt | ### | |
picamera_basic_advanced_recipes/18461_329_0.txt | All reactions | |
picamera_basic_advanced_recipes/18461_9_0.txt | * Solutions | |
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picamera_basic_advanced_recipes/18461_30_0.txt | Cancel Submit feedback | |
picamera_basic_advanced_recipes/18461_268_0.txt | [
](/HedoesnotDICE) | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_10_0.txt | ## 4.10. Web streaming ¶
Streaming video over the web is surprisingly complicated. At the time of
writing, there are still no video standards that are universally supported by
all web browsers on all platforms. Furthermore, HTTP was originally designed
as a one-shot protocol for serving web-pages. Since its inventio... | |
picamera_basic_advanced_recipes/243406_15_0.txt | Could you share your implementation so we can check it for you?
Thanks. | |
picamera_basic_advanced_recipes/18461_92_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_171_0.txt | [ 
](/hcgfighting) | |
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picamera_basic_advanced_recipes/imshowpythonmacosnot_53_0.txt | [ 
](/users/8129/lberger/) [ LBerger ](/users/8129/lberger/) ( 2019-01-24
07:11:44 -0600 ) edit | |
picamera_basic_advanced_recipes/18461_78_0.txt | --- | |
picamera_basic_advanced_recipes/18461_165_0.txt | I solved the problem through this method. There is no GUI on the server side,
so I need to comment out imshow. | |
picamera_basic_advanced_recipes/18461_361_0.txt | > Anything update? I encounter this error when I try the cpp-examples in the
> WSL ubuntu. Hope you could fix it soon. | |
picamera_basic_advanced_recipes/18461_185_0.txt | **[ w4w4n78 ](/w4w4n78) ** commented Apr 13, 2021 | |
picamera_basic_advanced_recipes/sshx11forwardingprob_16_0.txt | OpenCV version is 3.2.0
Host machine is ubuntu 16.04 ( I also tried with Ubuntu 18.04 ) | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_16_0.txt | [ updated ** 2019-01-24 07:21:53 -0600 ** ](/questions/207755/revisions/) | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_1_0.txt | [ Hi there! Please sign in ](/account/signin/?next=/question/207755/imshow-
pythonmacos-not-showing-the-image/) [ help ](/help/ "help") | |
picamera_basic_advanced_recipes/243406_30_0.txt | #include <vpi/Image.h>
@@ -149,6 +150,8 @@ int main(int argc, char *argv[])
cv::Mat cvOut(outData.planes[0].height, outData.planes[0].width, CV_8UC1, outData.planes[0].data,
outData.planes[0].pitchBytes);
imwrite("edges_" + strBackend + ".png", cvOut);
+ cv::imshow("output", cvOut);
+ cv::waitKey(... | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_93_0.txt | [ OpenCV Error: Assertion Failed (size.width>0 && size.height>0) in unknown
function ](/question/18135/opencv-error-assertion-failed-
sizewidth0-sizeheight0-in-unknown-function/) | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_65_0.txt | [ AnnaMP ](/users/414443/annamp/)
36 ● 1 ● 4 | |
picamera_basic_advanced_recipes/18461_18_0.txt | * [ The ReadME Project GitHub community articles ](https://github.com/readme) | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_3_0.txt | ## 4.3. Unencoded image capture (YUV format) ¶
If you want images captured without loss of detail (due to JPEG’s lossy
compression), you are probably better off exploring PNG as an alternate image
format (PNG uses lossless compression). However, some applications
(particularly scientific ones) simply require the ima... | |
picamera_basic_advanced_recipes/picamera_basic_recipes_15_0.txt | ## 3.15. Overlaying text on the output ¶
The camera includes a rudimentary annotation facility which permits up to 255
characters of ASCII text to be overlaid on all output (including the preview,
image captures and video recordings). To achieve this, simply assign a string
to the [ ` annotate_text ` ](api_camera.h... | |
picamera_basic_advanced_recipes/18461_337_0.txt | 👍 1 sunbeam-217 reacted with thumbs up emoji | |
picamera_basic_advanced_recipes/18461_351_0.txt | ### | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_20_0.txt | img = cv2.imread('butterfly.jpg', 0)
print(img) | |
picamera_basic_advanced_recipes/18461_188_0.txt | --- | |
picamera_basic_advanced_recipes/18461_203_0.txt | [ 
](/chrjen) | |
picamera_basic_advanced_recipes/18461_294_0.txt | [ 
](/liuzihaode) | |
picamera_basic_advanced_recipes/18461_50_0.txt | Already on GitHub? [ Sign in
](/login?return_to=%2Fopencv%2Fopencv%2Fissues%2Fnew%2Fchoose) to your account | |
picamera_basic_advanced_recipes/18461_336_0.txt | --- | |
picamera_basic_advanced_recipes/18461_232_0.txt | 👍 2 ducatlas and fengyuentau reacted with thumbs up emoji | |
picamera_basic_advanced_recipes/sshx11forwardingprob_27_0.txt | Registered: Jan 2020
Posts: 1 | |
picamera_basic_advanced_recipes/18461_76_0.txt | This code, which used to works without issue: [
https://github.com/Namburger/edgetpu-detection-camera
](https://github.com/Namburger/edgetpu-detection-camera)
We are only seeing this behavior on one of the system o_0 | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_85_0.txt | [ opencv imshow causing a memory leak (c++) ](/question/4806/opencv-imshow-
causing-a-memory-leak-c/) | |
picamera_basic_advanced_recipes/18461_346_0.txt | --- | |
picamera_basic_advanced_recipes/18461_270_0.txt | ### | |
picamera_basic_advanced_recipes/18461_180_0.txt | * 👍 1 reaction | |
picamera_basic_advanced_recipes/18461_256_0.txt | [
](/AyaNasser96) | |
picamera_basic_advanced_recipes/18461_45_0.txt | * [ Code ](/opencv/opencv)
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* [ Insight... | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_36_0.txt | img = cv2.imread('butterfly.jpg', 0)
if img is None:
print("Check file path") | |
picamera_basic_advanced_recipes/18461_234_0.txt | * 👍 2 reactions | |
picamera_basic_advanced_recipes/18461_63_0.txt | ### | |
picamera_basic_advanced_recipes/18461_179_0.txt | All reactions | |
picamera_basic_advanced_recipes/sshx11forwardingprob_19_0.txt | Do you have any idea about this issue ? Thanks for your helps ! | |
picamera_basic_advanced_recipes/18461_112_0.txt | Facing same error. Please solve this issue.... | |
picamera_basic_advanced_recipes/18461_40_0.txt | {{ message }} | |
picamera_basic_advanced_recipes/18461_211_0.txt | All reactions | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_3_1.txt | type=np.uint8, count=(fwidth//2)*(fheight//2)).\
reshape((fheight//2, fwidth//2)).\
repeat(2, axis=0).repeat(2, axis=1)
# Stack the YUV channels together, crop the actual resolution, convert to
# floating point for later calculations, and apply the standard biases
YUV = np.dstack((Y,... | |
picamera_basic_advanced_recipes/18461_140_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/18461_239_0.txt | **[ duriantaco ](/duriantaco) ** commented Nov 7, 2021 | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_64_0.txt | [ 
](/users/414443/annamp/) | |
picamera_basic_advanced_recipes/18461_82_0.txt | * 👍 3 reactions | |
picamera_basic_advanced_recipes/sshx11forwardingprob_4_0.txt | Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_7_1.txt | 64 video format (which is to say that,
for the same number of bytes, H.264 will provide considerably better quality
over the same number of frames). At higher resolutions (beyond 800x600) you
are likely to find you cannot sustain 30fps captures to the Pi’s SD card for
very long (before exhausting the disk cache).
If y... | |
picamera_basic_advanced_recipes/18461_121_0.txt | Check Internet about ` gtk_init_check() ` call failure reasons. | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_56_0.txt | Er, yes, I did have some weird issues during installation ... I installed with
'brew install opencv' and it got installed into /usr/local/lib/python3.7/site-
packages and but when I start ` python3 ` it runs Python 3.6 and I didn't know
how to start Python 3.7, so I created a symbolic link to
/usr/local/opt/opencv/lib/... | |
picamera_basic_advanced_recipes/18461_253_0.txt | All reactions | |
picamera_basic_advanced_recipes/18461_96_0.txt | @15927495612 nope, no words from the team, unfortunately :/ | |
picamera_basic_advanced_recipes/sshx11forwardingprob_18_0.txt | Extra Note:
When I play video with ffplay after connecting embedded board with ssh -X, I can see the video in the host side. | |
picamera_basic_advanced_recipes/18461_332_0.txt | Copy link | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_13_2.txt | camera.wait_recording(1)
finally:
camera.stop_recording()
Within a few inches of the camera, move your hand up, down, left, and right,
parallel to the camera and you should see the direction displayed on the
console.
New in version 1.5.
| |
picamera_basic_advanced_recipes/18461_311_0.txt | All reactions | |
picamera_basic_advanced_recipes/18461_79_0.txt | The text was updated successfully, but these errors were encountered: | |
picamera_basic_advanced_recipes/18461_189_0.txt | 👍 1 Hoangpham13579 reacted with thumbs up emoji | |
picamera_basic_advanced_recipes/18461_333_0.txt | ### | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_31_0.txt | C/C++:
Built as dynamic libs?: YES
C++ Compiler: /usr/local/Homebrew/Library/Homebrew/shims/mac/super/clang++ (ver 10.0.0.10001145)
C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-securit... |
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