I have successfully got a live video window from a Creative VF0350 webcam.
However if I remove the webcam and plug in a Hauppauge WinTv usb 7, the Creative webcam still shows up as a capture device, even after a reboot. No sign of the WinTv device either.
I'm calling capGetDriverDescriptionA to get a list of capture devices (in the avicap32.dll).
Is this a wintv driver problem?
Related
In chrome browser, I am using MacBook to record a 30 minutes class, in code, use getDisplayMedia to get the screen stream：
navigator.mediaDevices.getDisplayMedia({audio:true,video:true}).then((mediaStream)=>{
mediaRecorder = new MediaRecorder(mediaStream,{mineType:'video/webm'})
})
2.When the recording started 5 minutes later, I connected an external microphone to the MacBook, then lectured through the microphone, and then hoped that my voice would be recorded through the microphone, but the strange thing is that since the microphone is connected, there is no recording screen behind The sound is down, what’s the matter, how can I operate so that I can continue recording when switching microphones?
There are samples of using RPi camera, but none of them are useful.
I have added permissions in the manifest file, but still the output is showing : No cameras found. Why?
02-22 19:24:42.936 2134-2134/com.example.androidthings.doorbell
D/DoorbellActivity: Doorbell Activity created.
02-22 19:24:43.131 2134-2134/com.example.androidthings.doorbell
I/CameraManagerGlobal: Connecting to camera service
02-22 19:24:43.135 2134-2134/com.example.androidthings.doorbell
D/DoorbellCamera: No cameras found
02-22 19:24:43.135 2134-2134/com.example.androidthings.doorbell
W/DoorbellCamera: Cannot capture image. Camera not initialized.
If you look at the Hardware Support Matrix on the Developer Kits page, note that camera support is only provided over the CSI-2 interface, and not USB. The only media interface supported over USB in the current preview is audio record/playback.
I have two or more cameras connected to my pc. My goal is, to switch between the local cameras in an ongoing webrtc videoconference - but only to switch video from camera 1 to camera 2 NOT audio. Audio should always come from camera 1.
How to toggle between the two videoTracks?
See this answer.
Basically you can use replaceTrack() in Firefox to do this today for a seamless replacement of a camera. This is being added to the spec, but Chrome doesn't support it yet.
The best you can do in Chrome today is to get a new stream with the same mic but a different camera, remove the old stream/tracks from the PeerConnection and add the new one, and then handle onnegotiationneeded and renegotiate. This will likely cause a glitch, and will require at least a couple of round-trip-times to complete. (This will work in Firefox as well.
I'm using an AVCaptureSession to create a screen recording (OSX), but i'd also like to add the computer audio to it (not the microphone, but anything that's playing through the speakers) i'm not really sure how to do that so the first thing i tried was adding an audio device like so:
AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
After adding this device the audio was recorded, but it sounded like it was captured through the microphone. Is it possible to actually capture the computer's output sound this way? like quicktime does.
Here's an open source framework that supposedly makes it as easy to capture speaker output as it is a screenshot.
https://github.com/pje/WavTap
The home page for WavTap does mention that it requires kernel extension signing privileges to run under MacOS 10.10 & newer, and that requires signing into your Apple Developer Account and submitting this form. More information can be found here.
Using the supplied Android demo from
https://developer.sony.com/downloads/all/sony-camera-remote-api-beta-sdk/
Connected up to the WIFI connection on a Sony QX1. The sample application finds the camera device and is able to connect to it.
The liveview is not displaying correctly. At most, one frame is shown and the code hits an exception in SimpleLiveViewSlicer.java
if (commonHeader[0] != (byte) 0xFF) {
throw new IOException("Unexpected data format. (Start byte)");
}
Shooting a photo does not seem to work. Zooming does work - lens is moving. Camera is working fine when using the PlayMemories app directly, so no hardware issue.
Hoping from advice from Sony on this one - standard hardware and demo application should work.
Can you provide some details of your setup?
What version of Android SDK are you compiling with?
What IDE and OS are you using?
Have you installed the latest firmware? (http://www.sony.co.uk/support/en/product/ILCE-QX1#SoftwareAndDownloads)
Edit:
We tested the sample code using a QX1 lens and the same setup as you and were able to run the sample code just fine.
One thing to check is whether the liveview is ready to transfer images. To confirm whether the camera is ready to transfer liveview images, the client can check “liveviewStatus” status of “getEvent” API (see API specification for details). Perhaps there is some timing issue due to connection speed that is causing the crash.