video

问题 I try to Stabilize video with a Kalman filter for smoothing . But i have some problems Each time, i have two frames: one current and another one. Here my workflow: Compute goodFeaturesToTrack() Compute Optical Flow using calcOpticalFlowPyrLK() Keep only good points Estimate a rigid transformation Smoothing using Kalman filter Warping of the picture. But i think there is something wrong with Kalman because at the end my video is still not stabilized and it's not smooth at all, it even worse

问题 Good morning. I need to embed a video inside a beamer presentation that is visible in Adobe Reader without using Adobe Flash Player. As a minimal example, I used this snippet of code and it doesn't work. it only shows a black box: \documentclass{beamer} \mode<presentation> {\usetheme{Madrid}} \usepackage{graphicx} \usepackage{movie15} \usepackage{hyperref} \begin{document} \begin{frame} \begin{figure}[ht] \includemovie[poster,text={\includegraphics[width=8cm, height=6cm] {candp.png}},autoplay

问题 Hi have noticed video does not auto play on safari 11 anymore. Below is my code it works on Chrome as it has to be muted. It just shows the poster image. Any Help. <video width="100%" poster="poster_url.png" autoplay muted playsinline> <source src="video_url.mp4" type="video/mp4"> </video> 回答1: The below autoplays for me on Safari 11.1.2 on OSX 10.12.6 <video width="100%" poster="poster_url.png" autoplay muted playsinline> <source src="http://download.blender.org/peach/trailer/trailer_480p

问题 On the top of this homepage, I have a video with muted, autoplay and playsinline attributes. The video is autoplaying on desktop & mobile I've tested (Chrome, Safari, Firefox). Surprisingly, the video is not playing for lots of iPhone users, they have a PLAY button showing, requiring interaction then. Here is my code : <video id="vid" width="100%" height="auto" preload="auto" autoplay muted playsinline> <source src="http://www.nevada-club.com/wp-content/uploads/2018/06/Nevada_Club.mp4" type=

问题 I'm looking to batch convert all audio (mp3) in folder to video (mp4) with album artwork. This for uploading audios to youtube. I have pretty much a working code but I want to automate the whole thing. Here's the code from .bat file I'm using. (source:FFMpeg Batch Image + Multiple Audio to video) echo off for %%a in ("*.mp3") do "C:\ffmpeg\bin\ffmpeg" -loop 1 -i "C:\ffmpeg\bin\input.jpg.jpg" -i "%%a" -c:v libx264 -preset veryslow -tune stillimage -crf 18 -pix_fmt yuv420p -c:a aac -shortest

问题 I am trying to get a MediaFoundation SourceReader to read an H.264 video file, and render the frames to some Direct3D textures so I can them render them as I wish with Direct3D. I'm using SharpDX, but the principles are of course the same as native code. As I understand it, the general data flow should be like this: A SourceReader reads and decodes the video using SourceReader.ReadSample() A VideoProcessor (from IDirect3DDeviceManager9 ) transfers the frame to a Direct3D9 surface using

问题 Let's say that I have a list of hundreds of possible video files. Using ffmpeg it's pretty easy to take multiple files and stitch them together to single video output, but that's where the things become tricky. I'm looking for a way to have them stream live and dynamically add videos to queue as stream goes on. Think of something like SSAI but for the whole video. Stream live is there so we don't have a delay while waiting for ffmpeg to finish the whole video but rather start as soon as

问题 Let's say that I have a list of hundreds of possible video files. Using ffmpeg it's pretty easy to take multiple files and stitch them together to single video output, but that's where the things become tricky. I'm looking for a way to have them stream live and dynamically add videos to queue as stream goes on. Think of something like SSAI but for the whole video. Stream live is there so we don't have a delay while waiting for ffmpeg to finish the whole video but rather start as soon as

问题 I need to check if any application is playing any kind of media. Most importantly I want my Python program to detect whichever application is playing audio. The name of the application the audio is playing. And any related data are welcome. I searched this up before posting here. I got many results, but unfortunately those are not for python. They were made for languages like C and C++. My spec for your reference: Operating System: Windows 10 Python Version 3.8 来源： https://stackoverflow.com

问题 I have written some image acquisition software and as I am acquiring these images I want to add the last image onto the end of a video file (a time-lapse of all images acquired so far). This will give a video view of all the images. However I am struggling with trying to add the single frame. I have generated the time-lapse fine. The way I am doing this is waiting until I have gathered 10 images, then I generate the time-lapse. The command I have used to generate the time-lapse I will be