Are there any 'tricks' to speed up sampling of a very large knapsack combination type prob?

UPDATE: I have realized the problem below is not possible to answer in its current form because of the large amount of data involved (15k+ items). I just found out, the group I'm trying to help...

Erase an image after its been moved to a new location

I am making the game Asteroids. Everything functionally works properly, but originally I set the background color to black and had the objects represented by shapes that moved around on a Canvas....

EditText Performance: Understanding GPU Process Time on Profile GPU Rendering

I am investigating ways to improve performance in EditText, specifically in regards to load times. When loading large documents of few thousand words or more, calling setText can freeze the UI for...

c# Launch process without taking focus

I've created a GUI app that basically loads a video file, launches 3 processes with arguments in sequential order, (ffmpeg, x264, mp4box) and has the ability to abort if needed. I'm trying to...

Input text doesn't show keyboard on iOS simulator

I'm building an app and I need to use an input text. The problem comes when you tap on this input text, the keyboard doesn't appear. I don't know why, I don't know what I'm doing wrong. It is...

WebRTC onicecandidate: Am getting ICE candidates with sdpMid=audio only but not for video

The browser used is Chrome... I have the caller and receiver code to generate SDP and ICE candidates. I get the caller code to generate proper SDP and ICE candidates with sdpMid=video but for the...

Setting position does not work properly in LibVLC on Android

Setting position (rewind) does not work properly while playing RTMP streams (static files, not live stream) in the VLC player. The problem was discovered when developing an Android application to...

AVCaptureDeviceFormat 1080p 60 fps Autofocus issue

I noticed that AVCaptureDeviceFormat 1080p 60 fps on iPhone 6s does not supports focus pixels, so in low light conditions the camera continues to autofocus when moved. This creates an issue with...

Where are the links to each media file in a whatsapp database

I want to organize an album with all the photos from a Whatsapp group. With a rooted phone I have downloaded the unencrypted whatsapp databases to my computer. With Sqliteman on Ubuntu I've looked...

Suggests or methods of tv logo auto finding/locating/detection

Usually the logo detection means find the logo and recognize the logo. Some common works do the two steps together using SIFT/SURF matching method, detailed in (1)...

Mediainfo CLI batch to display total info of videos

I have a folder with many videos with nearly same informations. Here my script: mediainfo --Inform=file://C:\Users\Administrator\Desktop\Encode.tool\tem.txt...

How to get the ref of the first element that's rendered with .map?

I have a requirement to show thumbnails of videos(cards) in several rows and focus on the very first thumbnail. I did the display using Nested Map. The code basically iterates over a videos array...

Vuforia Video being played even if the image target is not focused

I have a project in which i used both Unity with Vuforia and Android studio I am playing a Video whenever the ImageTarget is tracked and when the target is lost, video will be paused. I am using...

Is it possible to find a list of all of the assembly instructions that GCC can generate?

In the homework for day one of Xeno Kovah's Introduction to x86 Assembly hosted on OpenSecurityTraining, he assigns, *Instructions we now...

Keyboard not showing properly when text field is placed in sliver

I'm trying to create searchbar using Cupertino widgets and slivers. Currently I have following structure: CupertinoApp CupertinoTabScaffold CupertinoPageScaffold CustomScrollView ...

MediaRecorder switch video tracks

I am using MediaRecorder API to record videos in web applications. The application has the option to switch between the camera and screen. I am using Canvas to augment stream recording. The logic...

How to Integrate D-Pad Focus Navigation?

I'm currently trying to make a Netflix-style UI in Flutter on my Android TV. I've been struggling with integrating focus navigation for the past few days and figured I'd ask here as there doesn't...

ElectronJS captures the screen with low quality

I am testing screen capture with ElectronJS. I can capture my screen but captured video has low quality than original. Operating system: Linux Mint 20 Electron version: 11.1.0 Here is my code. I...

What are production use cases for the useRef, useMemo, useCallback hooks?

Outside of the counter example seen in many YouTube tutorial videos, what are practical/real-world use cases for useMemo and useCallback? Also, I've only seen an input focus example for the useRef...

Autoplay video on element focus in react-native

import {Video} from 'expo-av'; return ( <FlatList data={videos} // keyExtractor={(item,ind} keyExtractor={(item) => item.names} renderItem={({item})=>( ...

TreeItem of material-ui to be focused by right-clicking

Please teach me how to control the background color when right-clicking on TreeView/TreeItem. Based on https://codesandbox.io/s/jggxz?file=/demo.tsx which is linked from...

Jetpack compose LazyColumn or Scrollable Column and IME padding for TextField doesn't work

I am trying to set a list if text fields, and when user set the focus on one text field at the bottom I expect that the user can see the appearing IME soft keyboard and the text field being padded...

Android Studio: A failure occurred while executing com.android.build.gradle.internal.res.ResourceCompilerRunnable

I know there are number of questions for variations for this error already, but none of them have helped me so far. I'm new to Android development and am lost in the numerous files scattered...

YoloV5 Image identification and Tracking -How to Draw a A continuous line connecting the previous point and current point until the object is in frame

I am trying to Detect human objects and balls from video input, I am able to identify both objects and draw a square box around the identified objects, but how can I draw a continuous line in the...

Make a C++ SDL2 standalone and cross-platform-development with CMake

My goal is to build a C++ app with SDL2 that can run on both Linux and Windows which may not have SDL2 installed. (I know that there are lot of posts about it, I'll come later). So I'm going...

I'm not seeing "Publish" button in Amazon Lex Bot and all the tutorials' screenshots I'm finding don't align with my AWS Consoles

Hello Stackoverflow Friends: *Context:* My goal is to use Amazon Lex Bot to communicate via an SMS text channel using an Amazon Pinpoint phone number associated with my account. Users will send...

ffmpeg: cannot save HLS stream to MKV

I am trying to achieve something straightforward: writing the code that captures a video stream and saves it into an *.mkv file "as-is" (yeah, no demuxing or reencoding or whatever). Just want to...

Handling clients with socket and threading in Python 3

I've got two .py files. One is server.py and the other is GUI.py, where I'm using Tkinter for the gui. My problem is: I can't seem to get how to write the code so that the server would get the...

SwiftUI: Bind TextField to property of type Decimal in Xcode > 13 beta 2

I am trying to bind a number to a TextField. For numbers of type Double, it works fine. However, if I use the type Decimal, the user input is discarded since Xcode Version 13 beta 3 and...

Problem to remove distortion (after camera-calibration) from image

The image is a single frame of a 90-minute video. If one draws a line from the top left corner (see, left-distorted) to the right (see, right-distorted), the distortion is visible by looking at...