Questions tagged [video]
The video tag has no usage guidance.
35 questions
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Server-side ad insertion and video downloaders
Video streaming sites like YouTube are experimenting with server-side ad insertion
Server-side ad insertion differs from normal YouTube ad insertion techniques primarily in how ads are delivered to ...
-2
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1
answer
102
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How changing the video quality works while watching video online?
How does changing the video quality works behind the scene? Suppose I am watching a video on youtube (I will use YT as an example in this question) and suddenly my internet speed becomes slow, in that ...
-3
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1
answer
344
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How are different resolution settings for videos handled by server and client based on setting and connection speed? [closed]
I was watching youtube and squinted at the text in the video and wondered what happens when I switch from 720p to 1080p.
Does the streaming service, Youtube and or any other, just have the files in ...
0
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0
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213
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What would be a good approach to applying computer vision to automatically edit out the downtime in tennis video?
I have an iOS/macOS tennis app that now lets the user import video, and I would like to add the ability to automatically edit out the significant amount of downtime where players are not in a rally or ...
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1
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699
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Best file formats for ML training
Hi I'm bulding an ML pipeline with PyTorch to support various tasks and am looking for some advice on efficient ways to store processed data.
The main frame work was 3 layers [data prep] -> [data ...
- 111
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50
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Looking for a faster solution to generate videos from data
I need to generate videos that are several hours long from CSV files. I have a working solution, but it's unusably slow and am looking for alternative ideas.
What I'm currently doing:
using an image ...
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0
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1
answer
427
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How to signal end of stream?
I am designing an interface for reading and writing video frames to various inputs and outputs. Stream operators seem to me a superb alternative to named functions for the task. This is the gist of it:...
- 7,149
2
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3
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729
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What algorithm is used in subtitles?
What algorithm does a video player use to find the subtitles to show at any given time?
I'm building a video player that displays some notes on different times over a video. Each note has a starting ...
- 233
1
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2
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465
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How a standard video file is structured under the hood
I am new to looking into video file formats, and am wondering what it would take to parse one. To do that, I first would need to understand what the format looks like, so that's what this question is ...
- 2,661
1
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1
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2k
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understanding video streaming on a servlet or webserver
This question has been asked quite a few times on StackOverflow and I would like to get an understanding of the concepts and process rather than directly solve a problem. I found the following post ...
- 111
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1
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513
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Perfect video processing pipeline?
I'm working on a modular video processing pipeline. It's currently presented as a tree of modules. Each module has a set of "results" and can dynamically request data results from other modules. Each ...
- 127
1
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1
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598
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Best approach to learn OpenCV to use with Swift? [closed]
I am trying to figure out how to use OpenCV with XCode's Swift. I need to do realtime video processing for the project I am working on, but I can't seem to find any good references on learning OpenCV ...
1
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2
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3k
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Video streaming through Ajax calls
These days I have seen couple of sites (including Youtube) that stream videos through Ajax calls (XHR) in few MBs or even less than MB. For an example of what I said see the highlighted lines in the ...
- 153
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3
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What handles the work of video streaming in ASP.NET MVC?
I want to play video using ASP.NET MVC. In my understanding, the model deals with the video files stored in file system and data in database. The controller retrieves the path of video file from model ...
- 117
1
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0
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139
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Distributed Design to Speed Up Video Processing
Currently I have one web server running Django, which takes a series of images from a user, uploads them to an Amazon S3 bucket, and finally calls an Amazon Lambda instance, which runs a python script ...
- 111
17
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1
answer
3k
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Is progressive HTTP download a viable alternative to HLS/DASH/RTMP for providing live video?
I'm working on a website that needs to stream live video to users, and as such I've had to get my head around the sorry state of current browser-based video-streaming technology. The most popular ...
- 1,241
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Difference between overhead of B frame and P frame
I understand that B frames either find the motion vector of the best matching block from either the past or the future reference frame. And P frames finds the motion vector of the best matching block ...
- 13
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2
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2k
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Custom Video Player
I have a custom file type .mft which is basically a zip that has video inside (mpg,mp4,etc) that is encrypted/protected.
My ideia is to create a custom video player which will read those .mft files, ...
- 111
3
votes
1
answer
126
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Are there any (free) video formats that include channels for arbitrary time-dependant data? [closed]
I'm in the process of writing an image analysis pipeline and I've hit a bit of a roadblock. Here's the 30,000-ft view:
Images arrive as base64-encoded PNG images over standard input
Images are ...
- 2,198
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1
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2k
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ffmpeg: cut multiple input files with seeking to one output file [closed]
I have list of video files (loaded from database), each with start and end time of requested interval:
# file begin end
v1.mp4 1:01 2:01
v2.mp4 3:02 3:32
v3.mp4 2:03 5:23
And ...
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5
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If we only know that a video is 720P, 480P or 240P can that unambiguously tell us of the resolution?
The main issue I have here is are the 720P, 480P, 240P... classes for defining video quality or do they unambiguously define the resolution of the video?
For example, the wikipedia article about 240P ...
1
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2
answers
123
views
Can I use the code for responsive video on this github link under a license?
This is the link: https://gist.github.com/jgarber/2302238
I am new to github and web development.So please bear with my questions.
I would like to use the responsive video code on the link mentioned ...
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2
answers
199
views
Is it possible to build software that interprets video in real time? [closed]
Say you had a live video stream of a popular boardwalk that had thousands of pedestrians walk down it each day. Could software be written to count the number of people that walk by a camera and ...
- 109
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3
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807
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Average video frame size for video codec
In simple words, is it true that an average size of an encoded video frame would be FrameSize = BitRate/FrameRate? Because BitRate shows how much data we are transferring per time unit, and FrameRate ...
- 155
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0
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511
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Video streaming, with minimum delay
My goal is to stream a video from my pc, to a smartphone.
However, i want the latency between us to be minimal.
VIDEO -> ENCODING -> TRANSFER -> DECODING -> VIDEO
I already know that the transfer ...
- 21
2
votes
2
answers
532
views
Taking an audio file, automatically transcribing it, taking the output, and matching it to a transcript
We have transcripts of around 8000 videos. However, these transcripts do not have any timed text (ie: they are not time coded to the video)
We are trying to ascertain whether software exists, or ...
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2
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16k
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Does FFMpeg support gpu acceleration of media encoding/decoding?
I was wondering if ffmpeg supported gpu acceleration. I was reading on their websites and came across contradicting information.
http://www.ffmpeg.org/general.html#Video-Codecs
-H.264 / AVC / MPEG-4 ...
- 133
7
votes
1
answer
8k
views
What are MPEG I, P and B frames?
I was recently going over MPEG articles and videos to understand how it works. I understand what I, P and B frames do but I do not understand how the prediction is calculated.
Assume that I want to ...
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5
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6k
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What are the benefits and drawback of documentation vs tutorials vs video tutorials [closed]
Which types of learning resources do you find the most helpful, for which kinds of learning and/or perhaps at specific times?
Some examples of types of learning you could consider:
When starting to ...
- 147
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1
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457
views
What are some feasible ideas for building a smart-device/console development portfolio? [closed]
I would like to start getting more contracts in the mobile, smart-device, and console development space and, having little prior work experience in the field, I need to build a portfolio of example ...
- 3,305
1
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1
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169
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Is it possible to modify a video codec + distribute it?
this is my first question on this particular stackexchange node, not sure if it's the most appropriate place for this question (if not, guidance to the appropriate node would be appreciated).
the ...
- 111
7
votes
1
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841
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Help me understand how to stream video
I'm an experienced PHP web developer that is looking to understand the options available for streaming video.
What I have: a video processing system (this one) that can provide output to various ...
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votes
5
answers
7k
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The perfect crossfade
I find it hard to describe this problem in words, which is why I made a video (45 seconds) to illustrate it. Here's a preview of the questions, please have a look at it on Vimeo: http://vimeo.com/...
- 537
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3
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8k
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Advantage of using Swing over AWT [closed]
Why is Swing preferred over AWT?
Which Swing component could be used for playing a video on it?
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4
votes
2
answers
9k
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How to make audio and video streaming servers work? [closed]
I am PHP MySQL developer and I am interested in the way television and radio are broadcasted over Internet live. I want to know how it works and and what are its requirements (which package of which ...
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