video

问题 As a result of the answer here: Recording cross-platform (H.264?) videos using WebRTC MediaRecorder How can one go about using ffmpeg.js to efficiently unwrap a webm h.264 video and re-wrap it into an mp4 container? I'm looking through the docs: https://github.com/Kagami/ffmpeg.js?files=1 However I don't see (or perhaps I'm looking for the wrong terminology) any examples for the above. This operation will be performed on the browser (chrome) prior to uploading as a Blob - I could use a web

问题 I would like to play a certain part of a video, for example, play a video from second 30 to second 33 using PyQt5. I am using the Qmultimedia widget. This is how my player code looks. Is there a way to start and end at a certain position? I've been manually clipping the video into subclips and just playing those subclips instead but that's very time consuming. Thank you! self.player = QtMultimedia.QMediaPlayer(None, QtMultimedia.QMediaPlayer.VideoSurface) file = QtCore.QDir.current().filePath

问题 I have a remotely hosted webpage with an html5 video player that streams H.264-encoded video. I need to embed this page (not open externally in a browser) in my Android Activity. The latest Android System Webview (ver 63.0) doesn't support H.264 encoding nor does Crosswalk's Webview (matching my hardware architecture). What are my options? 回答1: Updated answer After some digging, it seems that the webview in Android does indeed have issues supporting h.264. This is because it is based on

问题 So I am trying to compile the following code but it's showing me the error on cv2.findContours. Though, I am using Python 2.7 version. Any reason as to why the error: too many values to unpack python 2.7 is coming? import cv2 import numpy as np import time #Open Camera object cap = cv2.VideoCapture(0) #Decrease frame size cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1000) cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 600) def nothing(x): pass # Function to find angle between two vectors def Angle(v1,v2): dot = np

问题 Here is my problem : I want to play a large video file (3.6Gb) stored in a S3 bucket, but it seems the file is too big and the page crash after 30sec of loading. This is my code to play the video : var video = document.getElementById("video"); const mediaSource = new MediaSource(); video.src = URL.createObjectURL(mediaSource); mediaSource.addEventListener('sourceopen', sourceOpen, { once: true }); function sourceOpen() { URL.revokeObjectURL(video.src); const sourceBuffer = mediaSource

问题 I'm using AVMutableComposition and AVAssetExportSession to trim a video down. Randomly, and I mean randomly (I cannot consistently reproduce) users' videos have a few black frames at the start of the trimmed video. The audio is unaffected. I can confirm 100% that the videos being trimmed don't have anything to do with it, as this happens for a wide variety of videos from all different sources. Any insight into why these videos are being exported with black frames in the start would be very

问题 I'm testing on building a site locally on my machine using bootstrap. I have a <video> sort of as the header of the site. I would like this video to show the full width and height on mobile, and show a cropped/wide version of the video on desktop. I tried using inline media queries in the <source> tags, so that the src would change but nothing would work. So I switched gears and used some javascript to change it that way. So the crazy thing is, it seems my script works. When I look in chrome

问题 I'm creating an android app that requiers recording video and playing a video at the same time. I've been able to do it in IOS but i don't know if it's even possible to do it in android. So my question is; is this possible? 来源： https://stackoverflow.com/questions/25868039/android-record-video-while-playing-another-simultaneously

问题 I'm creating an android app that requiers recording video and playing a video at the same time. I've been able to do it in IOS but i don't know if it's even possible to do it in android. So my question is; is this possible? 来源： https://stackoverflow.com/questions/25868039/android-record-video-while-playing-another-simultaneously

问题 I'm creating an android app that requiers recording video and playing a video at the same time. I've been able to do it in IOS but i don't know if it's even possible to do it in android. So my question is; is this possible? 来源： https://stackoverflow.com/questions/25868039/android-record-video-while-playing-another-simultaneously