When the camera is connected, it returns exit status 3221226356

mondy commented 3 years ago

Your environment.

Version: github.com/pion/mediadevices v0.2.0
OS: Windows10

What did you do?

Run the following code. Set PION_LOG_DEBUG=all

package main

import (
    "image/jpeg"
    "log"
    "os"

    "github.com/pion/mediadevices"
    _ "github.com/pion/mediadevices/pkg/driver/camera"
)

func main() {
    stream, err := mediadevices.GetUserMedia(mediadevices.MediaStreamConstraints{
        Video: func(constraint *mediadevices.MediaTrackConstraints) {
        },
    })

    if err != nil {
        log.Fatalln(err)
    }

    track := stream.GetVideoTracks()[0]
    videoTrack := track.(*mediadevices.VideoTrack)
    defer videoTrack.Close()

    videoReader := videoTrack.NewReader(false)
    frame, release, _ := videoReader.Read()
    defer release()

    output, _ := os.Create("frame.jpg")
    jpeg.Encode(output, frame, nil)
}

What did you expect?

The camera should be captured and output to frame.jpg.

What happened?

When the camera is connected, the following will be output.

exit status 3221226356

When the camera is not connected, the following will be output.

mediadevices DEBUG: 13:50:58.335573 mediadevices.go:151: 
============ Found Properties ============

=============== Constraints ==============

DeviceID: any
VideoConstraints:
  Width: any
  Height: any
  FrameRate: any
  FrameFormat: any
AudioConstraints:
  ChannelCount: any
  Latency: any
  SampleRate: any
  SampleSize: any
  IsBigEndian: any
  IsFloat: any
  IsInterleaved: any

================ Best Fit ================

Not found
2021/06/14 13:50:58 failed to find the best driver that fits the constraints
exit status 1

What does exit status 3221226356 mean?

mondy commented 3 years ago

Is there any progress on this issue? Does the mediadevices module work properly? Is it under development? Can I use any webcam? Are there any restrictions on the specifications of the available webcams?

at-wat commented 3 years ago

Most of the contributors of this repository are using Linux, so I guess anyone is working on it.

I tried examples/http on the commit 070ab924f92a577612841242995aa750897c0e4a (current master) cross compiled by Go 1.16.2 and x86_64-w64-mingw32-gcc 10.3.1. It works on Windows 11 build 22000.co_release.210604-1628 with a USB camera.

Windows version of pkg/driver/camera is based on DirectShow. The camera should be compatible with DirectShow.

at-wat commented 3 years ago

I confirmed Intel RealSense R200 works on the above condition too.

mondy commented 2 years ago

I got a new USB camera. And fix enumlate windows camera.

Your environment.

Go: go1.17.7 windows/amd64
GCC: mingw-w64-x86_64-gcc 11.2.0-8
MediaDevices: github.com/pion/mediadevices master(e316b30) + fix
OS: Windows 10

Fix details

I forked it and fixed it here. A few fix. I do not understand DirectShow.

Look at the commit.

The first fix is to forget to increment the index. This is a general bug that does not involve DirectShow, so it should not be a problem.

The second fix is to fail if the captureFilter is nullptr. Fixed an error that occurred when trying to access captureFilter in the getPin function. I don't know if this fix is correct because I don't understand DirectShow.

I have only confirmed that the program that outputs the image above works.

In the meantime, I have identified the bug and forked it to report it. Please let me know if you would like me to pull request for you.

EmrysMyrddin commented 2 years ago

If you still have the occasion to open a PR for this, it would be awesome !

pion / mediadevices