Software Engineering Stack Exchange
Software Engineering Stack Exchange

Questions tagged [video]

34 questions
26
votes
5 answers

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/epologee/perfect-crossfade The issue of creating a…
epologee
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18
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1 answer

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 solutions for live streaming at present all have…
Mark Amery
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8
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2 answers

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 AVC / MPEG-4 part 10 (VDPAU acceleration)…
Jason123
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1 answer

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 record a video of a ball falling from the sky to…
A User
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7
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1 answer

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 streaming servers / CDNs / HTTPs. What I want: the…
Jeremy Kauffman
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5 answers

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 refers to a family of resolutions.
TheMeaningfulEngineer
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4
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2 answers

How to make audio and video streaming servers work?

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 programming language offers the best). And please…
S L
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4
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3 answers

Advantage of using Swing over AWT

Why is Swing preferred over AWT? Which Swing component could be used for playing a video on it?
Mohammad Faisal
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3
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1 answer

Are there any (free) video formats that include channels for arbitrary time-dependant data?

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 decoded, and processed. I don't think the details are…
Louis Thibault
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5 answers

What are the benefits and drawback of documentation vs tutorials vs video tutorials

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 integrate a new SDK inside an existing…
Cat
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2
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3 answers

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 time and an ending time, just like subtitles. I'm…
Samuel E.
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2
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2 answers

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 what approach to take to automatically time code the…
Paul Preibisch
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0 answers

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 library to generate individual frames use ffmpeg…
None
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1
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2 answers

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 about. Wondering if one could briefly outline how…
Lance
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1 answer

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 where the explanation was nicely detailed but have…
vbNewbie
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