EasyCamera | 云平台组件:EasyCamera云摄像机方案
kandi X-RAY | EasyCamera Summary
kandi X-RAY | EasyCamera Summary
云平台组件:EasyCamera云摄像机方案,支持云直播、云控制、云录像、云回放的摄像机方案!EasyCamera保持与EasyCMS长连接,注册在EasyCMS上。当有EasyClient客户端发出视频播放、云台控制、语音喊话等指令时,EasyCMS会将相应的指令转发给对应的EasyCamera设备,EasyCamera根据指令办事。iOS平台代码迁移在
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Top functions reviewed by kandi - BETA
- Create the window
- Start a record
- Pump a buffer into the stream
- Initializes the spninner
- Add a string to the queue
- Decompress a byte array
- Process Push OK
- Build out stream content
- Create the content
- Saves a string into the preferences
- Get the drop down view
- Get view at specific position
- Save buffer to file
- Encode source
- Handle click
- Cleanup service
- Rotate image
- Creates the splash activity
- Gets XPS
- Determine the closest supported picture resolution
- On receive broadcast
- Do keepalive
- Set the view orientation
- Read line
- Draws the status information
- Initializes the system
EasyCamera Key Features
EasyCamera Examples and Code Snippets
Community Discussions
Trending Discussions on EasyCamera
QUESTION
Background:
On Windows 10 I'm using getUserMedia (gUM) and MediaRecorder in Google Chrome (v71) to capture and encode a video stream.
- I'm using the constraints parameter to gUM to tell it I want a video format of 352x288.
I'm requesting
video/webm; codecs="avc1.42E01E"
as the MIME type of the encoded stream (that's H.264 boxed in Matroska).I'm selecting a cheezy webcam built into a laptop as the video source. It's called "EasyCamera" made by DMAX-AVC. It's tempting to call it CheezyCamera.
The video stream gets generated just fine.
Problem:
The dimensions of the encoded video in the stream are 440x360 rather than my requested 352x288. This information is embedded in the recorded stream, and only visible from the consumer of that data. Use of the various APIs reveals the gUM stream, MediaRecorder, and element metadata all think the dimensions are the ones I asked for.
Of course, webcam, gUM, and MediaRecorder treat the constraints parameter as suggestions, and are free to respond with something different. In this case they respond with 440x360 when I request 352x288. This system functions as designed; that is not my problem.
To clarify, the unexpected 440x360 dimensions are only visible to the consumer of the recorded stream. I hope to find a way to know the producer-side webcam, gUM, and MediaEncoder signal chain is producing a different resolution than I requested.
How does the stream consumer know the stream dimensions? They're in the 'PixelWidth' and 'PixelHeight' Matroska boxes, and they're baked in to the H.264 stream. (Oddly enough, considering this is a software-chosen resolution, it isn't an integral number of 16x16 macroblocks. It still works of course.)
I can't parse the recorded data in the browser because it's stored in opaque blobs.
When I use a different, better, webcam (a Logitech C615) my encoded video stream is the size I requested.
My question:
Is there any way in the webcam / gUM / MediaRecorder / signal chain to find the actual dimensions of the encoded stream in the browser actually recording the stream? That is, can I find the signal chain's response to my requested dimensions without decoding the generated stream?
ANSWER
Answered 2019-Jan-27 at 19:43Use MediaStream.getVideoTracks()
method to get the video track (MediaStreamTrack), then use MediaStreamTrack.getSettings()
to get MediaTrackSettings object, which contains the height and width of the video of the stream.
So if I request a video of 0 height specified as Constraints, I get a video of height 1 pixels. While streaming we can retrieve both the height I requested and the height I am getting as output.
QUESTION
Weird problem here, i use this command to capture my webcam through ffmpeg (through cmd on windows):
...ANSWER
Answered 2017-Jun-04 at 09:11The problem is that, in the commandline, video="Lenovo EasyCamera"
uses the quotes to make sure the space doesn't make it another argument.
You can see this with a test python file:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install EasyCamera
You can use EasyCamera like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the EasyCamera component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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