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• Need help understanding HTML 5 audio/video meta data use and placement

  27 juin 2012, par nicoz

  I have spent a significant amount of time researching HTML 5 audio and video, however I am stuck understanding the encoding of the meta data. It seems that in my research, using programs like Handbrake (ffmpeg) it is recommend to check of "web optimized" (There is also a similar type of setting when exporting from other types of software, like imovie). I have concluded (and correct me if I am wrong) that this has to do with moving the file's meta data to the beginning of the file. This then gives the player/browser the info it requires to play immediately without having to wait to load the entire file.

  So here is where I am confused and the question I need help with

  Does this only apply to the mp4 MOOV atom ? Or is there something similar in .ogv and .webm files ?

• Open avi file with OpenCV : ffmpeg ?

  28 juin 2012, par CTZStef

  This question is related to a previous question I asked here.

  I read on the Willow Garage website dedicated to OpenCV that we do not have to take care of ffmpeg while installing OpenCV since version 1.2.x. Here it is.

  However, some questions asked here on Stackoverflow suggest the contrary.

  So, what should I do ? Do I have to recompile OpenCV and do some special operation related to ffmpeg to get it to, finally, open avi file on my Linux system ?

• C# : get web camera name for FFmpeg

  16 avril 2013, par JustLogin

  In my C# app I'm using FFmpeg to stream desktop and it works fine. I also want FFmpeg to publish video from web camera. The problem is, that when I use desktop as input, device name parameter is already known (-i video=UScreenCapture), but it's not when I want to use web camera and microphone. So, my question is, how to get web camera and microphone names using C#.