# DSHOW VideoCapture from USB device shows garbage data

**URL:** <https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901>\
**Category:** Uncategorized\
**Created:** [April 21, 2021, 6:55pm UTC](https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901 "2021-04-21T18:55:26Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![shehni](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/shehni/32/1926_2.png) [@shehni](https://forum.opencv.org/u/shehni)\
**Post date:** [April 21, 2021, 6:55pm UTC](https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901/1 "2021-04-21T18:55:26Z")

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> [@Transmitting image from a wifi camera](https://forum.opencv.org/t/transmitting-image-from-a-wifi-camera/2295/2):
>
> usb

hi  
I am new in opencv. I use USB webcam without IP. I wrote this code

> input\_movie = cv2.VideoCapture(cv2.CAP\_DSHOW)  
> if input\_movie.isOpened():  
> print(“camera is open”)

 ![Untitled](https://us1.discourse-cdn.com/flex020/uploads/opencv/original/2X/d/da8b417f52c0f02abdd6923ba3f25df331bbe89c.jpeg)  
and camera is open printed but my image like this  
could anybody help me?  
tnx

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**Author:** ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)\
**Post date:** [April 21, 2021, 7:42pm UTC](https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901/3 "2021-04-21T19:42:51Z")

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I’ve split this off into its own topic. feel free to adjust the title.

as to the issue… please also try MSMF and FFMPEG for `apiPreference`.

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**Author:** ![hamblingreg52](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/hamblingreg52/32/1788_2.png) [@hamblingreg52](https://forum.opencv.org/u/hamblingreg52)\
**Post date:** [April 22, 2021, 4:25am UTC](https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901/4 "2021-04-22T04:25:57Z")

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@shehni I think you are asking unrelated question with your title. When i read your title and when i saw your question i totally gone made. 🙂

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**Author:** ![shehni](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/shehni/32/1926_2.png) [@shehni](https://forum.opencv.org/u/shehni)\
**Post date:** [April 25, 2021, 2:47pm UTC](https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901/5 "2021-04-25T14:47:57Z")

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I so sorry … I considerate it next time. tnx 🙏

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**Author:** ![shehni](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/shehni/32/1926_2.png) [@shehni](https://forum.opencv.org/u/shehni)\
**Post date:** [April 25, 2021, 2:49pm UTC](https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901/6 "2021-04-25T14:49:55Z")

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tnx so much … I try MSMF and FFMPEG but both neither work 😕 😕 I think my camera is not compatible with opencv APIs .

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**Author:** ![shehni](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/shehni/32/1926_2.png) [@shehni](https://forum.opencv.org/u/shehni)\
**Post date:** [April 25, 2021, 2:51pm UTC](https://forum.opencv.org/t/dshow-videocapture-from-usb-device-shows-garbage-data/2901/7 "2021-04-25T14:51:10Z")

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> [@berak](#):
>
> own

yes … you right. so sorry I consider it next time