screen-split-video | creative way | Video Utils library

 by   chocoluffy JavaScript Version: Current License: No License

kandi X-RAY | screen-split-video Summary

kandi X-RAY | screen-split-video Summary

screen-split-video is a JavaScript library typically used in Video, Video Utils applications. screen-split-video has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

right video是静止的不动的, 同时位于最底层。 目前所有的伸缩都是在控制left video, 同时由于我们设置了left video的z-index为3, 那么左边的视频会覆盖在右边的视频上。接下来的目标就很明确了, 我们需要追踪鼠标在整个container里面的位置(我们会用占宽度的百分比来表示), 然后, 通过改变左边视频的宽度, 同时也就把位于下面的右边视频暴露出来了, 来达到切换的效果。. 理解到这一步之后,目标就是如何改变视频宽度了。这里其实隐藏着一个陷阱, 就是因为我们不可以直接改变视频本身的宽度,因为视频的高宽比在拍摄的时候就决定了, 我们如果只拉长视频而不同时提高高度的话, 就会使得在纵轴上部分内容被遮盖到, 大致意思如图:. 而这并不是我们想要的效果, 我们希望, 视频可以维持在同一个大小,而改变的只是视窗的横向移动, 这一步我用到了一个trick, 就是overflow: hidden;, 我们在左边的视频外面包住了一层div, 因为我们控制的就是左边的视频, 然后我们来改变这个“wrapper”的宽度(同时保证保证里面的left video的宽度占比仍然占最外面container的100%), 来改变我们的视窗, 所以这个wrapper在网页上所包住的部分, 加上了overflow: hidden;遮去了超出部分后, 显示的就是左边的视频了。. 比如一开始, 我们希望两个视频都各占一半, 那么左边的视窗一开始就会是占比原container的宽度的50%, 而原视频本身的宽度应该不变, 即container的宽度的100%, 所以我们需要给left video赋上200%的宽度, 理由是这个属性是对其直接父级的div起作用的。. 简单地说, 只需保证videoClipper.style.width * leftVideo.style.width = 100%即可。. 初衷: 因为从拍摄的角度, 大部分的时间, 我们都会把拍摄的主体放在视频的中间位置, 而如果我们只是简单地移动视窗而不改变视窗的主角位置的话, 我们在鼠标移动的时候, 就只能看到边边角的视频内容了, 这违反设计直觉。. 画外音: 使用transform来改变DOM元素的位置相比直接改写他们的”定位属性“有很多好处, 其中最突出的就是, transform使用的是GPU, 而那些top\left等的定位元素使用的是CPU, 我们希望充分利用GPU和它提供的硬件加速, 同时transform也不会触发网页的repaint, 从而在渲染上更加的smooth和fast。. 那这个地方,offset就是鼠标在container里面距离左边边框的距离, 那么我们同时根据这个距离, 让左边的视频在视窗移动时, 往相反的方向以一半的速度移动来弥补视窗偏差。使得可以在视窗移动的时候, 始终保持视频本身拍摄的主体视角也处于该视窗的主体视角! 原理可以参考这个图:.
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            kandi-support Support

              screen-split-video has a low active ecosystem.
              It has 10 star(s) with 6 fork(s). There are 2 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              screen-split-video has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of screen-split-video is current.

            kandi-Quality Quality

              screen-split-video has 0 bugs and 0 code smells.

            kandi-Security Security

              screen-split-video has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              screen-split-video code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              screen-split-video does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              screen-split-video releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.
              It has 81 lines of code, 0 functions and 1 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

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            screen-split-video Key Features

            No Key Features are available at this moment for screen-split-video.

            screen-split-video Examples and Code Snippets

            No Code Snippets are available at this moment for screen-split-video.

            Community Discussions

            QUESTION

            Download only instagram videos with instaloader
            Asked 2022-Mar-29 at 15:57

            This code is working for downloading all photos and videos

            ...

            ANSWER

            Answered 2022-Feb-19 at 06:17

            QUESTION

            How to disable HTML Video Player playback speed / three dots
            Asked 2022-Mar-25 at 16:32

            I don't want to show playback speed in my video, is there any controls or controlList properties to disable that option like controls disablepictureinpicture controlslist="nodownload"

            ...

            ANSWER

            Answered 2021-Sep-08 at 10:36

            According to the docs only three options are available (nodownload, nofullscreen, and noremoteplayback) and none seems to do what you want.
            And you can't style the browser's default control set, but you can use the (JavaScript) Media API to build your own control set which of course you can style in any way that you like. See this CodePen.

            Source https://stackoverflow.com/questions/69100753

            QUESTION

            Calculate average pixel intensity for each frame of tif movie
            Asked 2022-Feb-18 at 23:25

            I imported a tif movie into python which has the dimensions (150,512,512). I would like to calculate the mean pixel intensity for each of the 150 frames and then plot it over time. I could figure out how to calculate the mean intensity over the whole stack (see below), but I am struggling to calculate it for each frame individually.

            ...

            ANSWER

            Answered 2022-Feb-18 at 23:25

            You could slice the matrix and obtain the mean for each frame like below

            Source https://stackoverflow.com/questions/71180335

            QUESTION

            FFMPEG metadata not work with segment format
            Asked 2022-Feb-11 at 10:03

            I'm trying to add rotation metadata to the video recorded from RTSP stream. All works fine until I try to run recording with segment format. My command looks like this:

            ...

            ANSWER

            Answered 2022-Feb-11 at 10:03

            I found out it has been resolved in

            https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=a74428921f8bfb33cbe0340bfd810b6945e432d2#patch1

            and it works fine in ffmpeg 5.0. You can also apply this patch to 4.4.

            Source https://stackoverflow.com/questions/71020015

            QUESTION

            jQuery. Pause video with timeout
            Asked 2022-Feb-04 at 20:36

            I have several videos on my site that have the same class.

            I want to play only one video when hovering over it. As soon as I removed the hover, the video was paused with a delay of 1 second.

            I learned how to start a video and pause it. But as soon as I add setTimeout I get an error: Uncaught TypeError: Cannot read properties of undefined (reading 'pause')

            Below I am attaching the html code of my solution:

            ...

            ANSWER

            Answered 2022-Feb-04 at 20:36

            The issue is because this in the setTimeout() function handler refers to that function, not to the element reference provided in the invocation of the outer hoverVideo() or hideVideo() functions.

            To fix this issue create a variable in the outer scope to retain the reference to this which you use within the setTimeout():

            Source https://stackoverflow.com/questions/70992387

            QUESTION

            FFmpeg : How to apply a filter on custom frames and place output of them between mainframes
            Asked 2022-Feb-04 at 10:13

            I have an interlaced video stream and need apply a filter (any filter that takes two frames as input , for example tblend or lut2) on custom video frames and place output of them between mainframes like this :

            ...

            ANSWER

            Answered 2022-Feb-04 at 10:13

            You may chain tblend, interleave and setpts filters, while the two inputs to interleave filter are the output of tblend and the original video:

            Example (assuming input framerate is 25Hz):

            Source https://stackoverflow.com/questions/70936689

            QUESTION

            Javascript: frame precise video stop
            Asked 2022-Jan-28 at 14:55

            I would like to be able to robustly stop a video when the video arrives on some specified frames in order to do oral presentations based on videos made with Blender, Manim...

            I'm aware of this question, but the problem is that the video does not stops exactly at the good frame. Sometimes it continues forward for one frame and when I force it to come back to the initial frame we see the video going backward, which is weird. Even worse, if the next frame is completely different (different background...) this will be very visible.

            To illustrate my issues, I created a demo project here (just click "next" and see that when the video stops, sometimes it goes backward). The full code is here.

            The important part of the code I'm using is:

            ...

            ANSWER

            Answered 2022-Jan-21 at 19:18

            The video has frame rate of 25fps, and not 24fps:

            After putting the correct value it works ok: demo
            The VideoFrame api heavily relies on FPS provided by you. You can find FPS of your videos offline and send as metadata along with stop frames from server.

            The site videoplayer.handmadeproductions.de uses window.requestAnimationFrame() to get the callback.

            There is a new better alternative to requestAnimationFrame. The requestVideoFrameCallback(), allows us to do per-video-frame operations on video.
            The same functionality, you domed in OP, can be achieved like this:

            Source https://stackoverflow.com/questions/70613008

            QUESTION

            How to extract available video resolutions from Facebook video URL?
            Asked 2022-Jan-26 at 12:11

            In my Facebook Video Downloader android application i want to show video resolutions like SD, HD with size. Currently i am using InputStreamReader and Pattern.compile method to find SD and HD URL of video. This method rarely gets me HD link of videos and provides only SD URL which can be downloaded.

            Below is my code of link parsing

            ...

            ANSWER

            Answered 2022-Jan-26 at 12:11

            Found a solution for this so posting as answer.

            This can be done by extracting Page Source of a webpage and then parsing that XML and fetching list of BASE URLs.

            Steps as follow:

            1- Load that specific video URL in Webview and get Page Source inside onPageFinished

            Source https://stackoverflow.com/questions/70782618

            QUESTION

            Why doesn't `width:100%; height:100%; object-fit: contain;` make a fit its container?
            Asked 2022-Jan-21 at 00:57

            So I have a page with a grid layout, with a header and a footer and a black content container in the middle.

            ...

            ANSWER

            Answered 2022-Jan-21 at 00:57
            1fr

            The first thing you need to know is that 1fr is equivalent to minmax(auto, 1fr), meaning that the container won't be smaller than its content, by default.

            So, start by replacing 1fr with minmax(0, 1fr). That will solve the overflow problem.

            Source https://stackoverflow.com/questions/70795059

            QUESTION

            Inconsistent frame number with ffmpeg
            Asked 2022-Jan-16 at 00:46

            I'm having regularly issue with hvc1 videos getting an inconsistent number of frames between ffprobe info and FFmpeg info, and I would like to know what could be the reason for this issue and how if it's possible to solve it without re-encoding the video.

            I wrote the following sample script with a test video I have

            I split the video into 5-sec segments and I get ffprobe giving the expected video length but FFmpeg gave 3 frames less than expected on every segment but the first one.

            The issue is exactly the same if I split by 10 seconds or any split, I always lose 3 frames.

            I noted that the first segment is always 3 frames smaller (on ffprobe) than the other ones and it's the only consistent one.

            Here is an example script I wrote to test this issue :

            ...

            ANSWER

            Answered 2022-Jan-11 at 22:08

            The source of the differences is that FFprobe counts the discarded packets, and FFmpeg doesn't count the discarded packets as frames.

            Your results are consistent with video stream that is created with 3 B-Frames (3 consecutive B-Frames for every P-Frame or I-Frame).

            According to Wikipedia:

            I‑frames are the least compressible but don't require other video frames to decode.
            P‑frames can use data from previous frames to decompress and are more compressible than I‑frames.
            B‑frames can use both previous and forward frames for data reference to get the highest amount of data compression.

            When splitting a video with P-Frame and B-Frame into segments without re-encoding, the dependency chain breaks.

            • There are (almost) always frames that depends upon frames from the previous segment or the next segment.
            • The above frames are kept, but the matching packets are marked as "discarded" (marked with AV_PKT_FLAG_DISCARD flag).

            For the purpose of working on the same dataset, we my build synthetic video (to be used as input).

            Building synthetic video with the following command:

            Source https://stackoverflow.com/questions/70578206

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install screen-split-video

            You can download it from GitHub.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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          • HTTPS

            https://github.com/chocoluffy/screen-split-video.git

          • CLI

            gh repo clone chocoluffy/screen-split-video

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            git@github.com:chocoluffy/screen-split-video.git

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