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Questions tagged [video]

Video is an electronic medium for the recording, copying, and broadcasting of moving visual images. Use more specific tags when relevant, such as [video-editing] for questions related to trimming and modifying videos, [video-encoding] for questions related to editing videos into any format, and [video-processing] for questions related to processing videos with filtering video frames.

As video capture and playback varies significantly across platforms, please include a tag with the target OS or platform (e.g., Windows, OSX, Android, YouTube, Java, QuickTime). Before posting, please also check that your question is on topic.

Video technology was first developed for cathode ray tube (CRT) television systems, but several new technologies for video display devices have since been invented.

Common digital video codecs (or formats) include:

  • CCIR 601 used for broadcast stations
  • MPEG-4 good for online distribution of large videos and video recorded to flash memory
  • MPEG-2 used for DVDs, Super-VCDs, and many broadcast television formats
  • MPEG-1 used for video CDs
  • AVI
  • DIVX
  • XVID
  • H.261
  • H.263
  • H.264 also known as MPEG-4 Part 10, or as AVC, used for Blu-ray Discs and some broadcast television formats
  • Theora used for video on Wikipedia

References:

See also:

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How to modify the content of WebRTC MediaStream video track?

I use WebRTC in a scenario in which the client video stream is recorded on a third-party server https://tokbox.com/. I would like to put some kind of watermark in the recorded video. Investigation brought me to this page…
David Klassen
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AVAssetExportSession fails to convert .mov from photo library. Why?

Scenario: I wish to reduce the size of individual videos from my iTouch photo library. 1. Collect videoAssets from library. 2. Get a thumbnail of the PHAsset - works. 3. Get the actual video from the library. 4. Request the AVAssetForVideo…
Frederick C. Lee
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Add image overlay on video FFmpeg

I have a video, test.mp4, and an image, test.png. test.png is a black image with a transparent "hole" in the center. I would like, using FFmpeg: To display test.png over the video so I can only see a circle of video If possible, to resize test.png…
user1361491
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Blank frame on merging videos using AVMutableComposition

This question has been asked many times before but nothing helped me. I am merging multiple videos using AVMutableComposition. After merging videos, I get blank frames in between 30 - 40% of the videos. Others merge fine. I just play the composition…
blancos
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Convert isom to mp42

How do I convert a video from ISOM to MP42? Using FFMPEG in particular? There is no such an option to specify that. General Complete name : C:\wamp\www\tree.mp4 Format : MPEG-4 Format…
Jeffrey.K.
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Dynamically change embedded video src in IE/Chrome (works in Firefox)

I'm trying to dynamically change an embedded video on a page. It's working in Firefox but for some reason it's not working in IE and Chrome (strange combination). Here's the HTML:
macca1
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html5 video player with simplest controls (only play and pause)

Somehow, there are really little tutorials out there for html5 video and audio playback. I simply want to embed video and audio files with customized controls. However, the controls should be fairly simple. I only need a play-button. If clicked,…
matt
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Getting black screen when added ExoPlayer into GLSurfaceView

I have one GLsurfaceview and video SurfaceView when I added Surfaceview into GLSurfaceView for playing video and result is I am getting black screen instead of video screen. I am getting Audio properly but video screen will not display and it…
yogendra joshi
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How to apply video filtering in android?

I am working on app like instagram where i have to apply filters on already created video and stored it in SDCard. I have searched a lot but at the end of day i find one library named FFMPEG but didn't get any help. I am newbie in video filtering.…
Hardik Joshi
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Crop video in iOS see weird green line around video

Hey everyone I am cropping a video taken from the camera on iPhone and then cropping it an playing it back like this. When i do it however I get a weird green line around the bottom and right side of the video? Not sure why this is happening or how…
iqueqiorio
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Problems with extracted MP3 using Youtube-dl on Windows

I subscribe to various free music channels on YouTube and I'm looking to embed youtube-dl.exe in a .net program to monitor the channels and download and convert the songs as they are posted to the channels. I've gotten that part of the program…
Chris
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ffmpeg options that work with Chrome

I am trying to find the magic options that make mp4 work in Chrome. I think my videos were working, but don't seem to any more after Chrome updated. Chrome, Version 41.0.2272.101 (Windows) I tried some other machines and found some of the videos…
James
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verify if video exist with youtube api v3

I'm trying to verify if a youtube video (with the id_video) is valid/exist , using the youtube api V3. That's what i do (y2oy7b4SFgE is the id of the video i test): $file_headers =…
user3417911
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Is it possible to preload an entire HTML5 video source before playing?

Solution I created a working example of the accepted answer which uses an XHR and reports loading progress through a bar. It's available here. https://github.com/synthecypher/full-preload Question I've noticed when I create a
jshbrntt
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How to animate multiple video layers at the same time in AVMutableComposition?

I'm writing a piece of code that generates a slide show video from multiple images and multiple videos on iOS devices. I was able to do so with a single video and multiple images, but I'm not be able to figure out how to enhance it to multiple…
Satoshi Nakajima
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