video

问题 I'm trying to modify and write some video using openCV 2.4.6.1 using the following code: cv::VideoCapture capture( video_filename ); // Check if the capture object successfully initialized if ( !capture.isOpened() ) { printf( "Failed to load video, exiting.\n" ); return -1; } cv::Mat frame, cropped_img; cv::Rect ROI( OFFSET_X, OFFSET_Y, WIDTH, HEIGHT ); int fourcc = static_cast<int>(capture.get(CV_CAP_PROP_FOURCC)); double fps = 30; cv::Size frame_size( RADIUS, (int) 2*PI*RADIUS ); video

问题 We have some files encoded in AV1, but we recently noticed that Chrome mobile fails to play the files - but it doesn't fall back to an encoding it can use - it just puts the unplayable AV1 file in there. I'm hoping that if we add a codec attribute we can remedy this - but I'm not sure how to determine the codec for these AV1 files. I've come across this documentation on MDN, but I'm not sure how I would determine the proper codec from that. It starts off simple enough, but some of the values

问题 Goal: I'm trying to loop a video infinitely on a React gatsby site. I have a mp4 file locally under assets, but it doesn't show up on my screen. What I've tried: I thought it might be a CSS issue so I set it and it's clearly width and height 100% of the window but video is still not showing up. JS: import React from "react" import "./index.css" export default () => ( <div> <video id="background-video" loop autoPlay> <source src="..\assets\video\Cenote_Squad_Cinemagraph_1500x840_Final.mp4"

问题 Goal: I'm trying to loop a video infinitely on a React gatsby site. I have a mp4 file locally under assets, but it doesn't show up on my screen. What I've tried: I thought it might be a CSS issue so I set it and it's clearly width and height 100% of the window but video is still not showing up. JS: import React from "react" import "./index.css" export default () => ( <div> <video id="background-video" loop autoPlay> <source src="..\assets\video\Cenote_Squad_Cinemagraph_1500x840_Final.mp4"

问题 Goal: I'm trying to loop a video infinitely on a React gatsby site. I have a mp4 file locally under assets, but it doesn't show up on my screen. What I've tried: I thought it might be a CSS issue so I set it and it's clearly width and height 100% of the window but video is still not showing up. JS: import React from "react" import "./index.css" export default () => ( <div> <video id="background-video" loop autoPlay> <source src="..\assets\video\Cenote_Squad_Cinemagraph_1500x840_Final.mp4"

问题 Goal: I'm trying to loop a video infinitely on a React gatsby site. I have a mp4 file locally under assets, but it doesn't show up on my screen. What I've tried: I thought it might be a CSS issue so I set it and it's clearly width and height 100% of the window but video is still not showing up. JS: import React from "react" import "./index.css" export default () => ( <div> <video id="background-video" loop autoPlay> <source src="..\assets\video\Cenote_Squad_Cinemagraph_1500x840_Final.mp4"

问题 I am playing the .mp4 h264 video in exoplayer with defaultExtractor. Video is not seekable. When i seek the video it goes to start everytime i want to seek it. Others MP4 videos plays fine without any issue . Help me I am beginner of exoplayer . 来源： https://stackoverflow.com/questions/59835152/h264-mp4-video-not-seekable-in-exoplayer

问题 I managed to do this by taking a series of screenshots and convert them to video using ffmpeg (ffmpeg compiled for android and include all *so to asserts, copy them all to to data/data/my.package/ and execute ffmpeg from there) But the main problem is the taking screenshots have big impact on screen rendering, it freezes a while (~0.1sec) when the app is executing this line of code: Gdx.gl.glReadPixels(x, y, w, h, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, pixels); I tried to take screenshots from

问题 I am trying to produce an .exe of a simple GUI made with PyQt4 in python 2.7 using pyinstaller to play a video. Here are the details of my problem: Simple layout with two buttons, one to load video, other to play video. In my IDE, the video loads and plays perfectly. The video pops up in another window and closes when it is over. After running pyinstaller on the program, the GUI interface pops up after running the .exe. The open file dialog works correctly, however the video will not play. In

问题 i am trying to set a video to fullscreen using opencv. the input is coming from the camera. it shows on the screen in the center but not as full screen. relevant code: public class Sample3Native extends Activity implements CvCameraViewListener { private static final String TAG = "OCVSample::Activity"; private Mat mRgba; private Mat mGrayMat; private Mat mFinalMat; private CameraBridgeViewBase mOpenCvCameraView; private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {