webm

问题 I am trying to stream video from a IP Cam to my my Wordpress site. I would like my stream to be available via common devices Windows, Mac, Android and IOS. Currently I am using VLC to stream,but I can only get a flash stream to work but I would like to do FLV, MP4 and webm. What player should I use to display the MP4 and webm video on the site? Also I don't think the calls to VLC are correct cause I can't open the MP4 and webm stream in VLC on another computer, but I can open the flv stream.

问题 I've built some code that will get the MediaRecorder API to capture audio and video, and then use the ondataavailable function to send the corresponding webm file blobs up to a server via websockets. The server then sends those blobs to a client via websockets which puts the video together in a buffer using the Media Source Extension API. This works well, except that if I want to start a stream partway through, I can't just send the latest blob because the blob by itself is unplayable. Also,

问题 So, I'm building a website on which users can upload an watch videos. I'm using the standard HTML5 video player ( <video...> <src>... ) Currently, I use multiple sources: MP4, OGG and WEBM, for cross-browser compatibility Due to the fact that maintaining three formats is both CPU intensive (converting) as well as eating away precious disk space, I started searching the need to find out whether it's really needed to support this three formats According to the chart I found on Wikipedia (http:/

问题 I have a rewrite rule in .htaccess RewriteRule (.+?\.fid)/ /$1 [L] with a request URI like: /123.fid/myfile.webm How can I force the mime type to: video/webm using .htaccess including the rule above? What I have attempted already, to add on TOP of the .htaccess file without success: AddType video/webm .webm and <FilesMatch "\.webm$"> ForceType video/webm </FilesMatch> I use apaches mime_magic module to look up mime type of .fid files, but this doesn't apply to webm files. I'm assuming it's

问题 I'm currently researching the subject of encrypting and playing encrypted videos in browser. I already have some successes with castlabs' DRMToday and Shaka Player while using Widevine. Now I'm trying to encrypt video without external services using ClearKey and play it in Chrome (using whatever js player which can handle). I did manage to encrypt single mp4 file using MP4Box (and mse-eme for creating crypt configuration) but I have no idea how to play it in browser. HTML5's Video didn't even

问题 There's a way to merge an audio (wav) and a video (webm) in a nodejs server? Since WebM is a container format, I hope that is possible add audio track to an existing WebM file. I'm right? Anyone know a NodeJS package for doing this? 回答1: Found a solution, but is not really simple to do. For do this is required ffmpeg (or similar). To install it I done this steps: (only for mac) install HomeBrew. run the installation of ffmpeg with all the dependences that is required: sudo brew install ffmpeg

问题 does anyone know of a java library that plays vp8 or webm videos? thanks! 回答1: VLC can play webm and vp8 videos since version 1.1.0, and there are Java bindings available for it. Have a look at: jVLC: http://wiki.videolan.org/Java_bindings VLCJ: http://code.google.com/p/vlcj/ I've used jVLC and it works, but it is not actively maintained anymore. VLCJ looks very good. 回答2: http://sourceforge.net/projects/javavp8decoder/ it's beta but maybe it's a start. 回答3: I don't know of any native

问题 I am trying to convert a .mov file with alpha transparency into a .webm file and have been following this thread for help: Convert mov with Alpha to VP9 Webm with Alpha Using ffmpeg The command line I have been using is ffmpeg -r 24/1 -i Desktop/Skel_Walk_1.mov -c:v libvpx -pix_fmt yuva420p Desktop/Skel_Walk_1.webm However when I go to run the command it comes up with 2 errors Transparency encoding with auto_alt_ref does not work and Error initializing output stream 0:0 -- Error while opening

问题 I have an app that generates a bunch of jpgs that I need to turn into a webm video. I'm trying to get my rgb data from the jpegs into the vpxenc sample. I can see the basic shapes from the original jpgs in the output video, but everything is tinted green (even pixels that should be black are about halfway green) and every other scanline has some garbage in it. I'm trying to feed it VPX_IMG_FMT_YV12 data, which I'm assuming is structured like so: for each frame 8-bit Y data 8-bit averages of

问题 I'm stumped with encoding videos into a dash compliant format. I'm going from .mp4 to .webm Firstly, I am running OS X and ffmpeg 2.5.4. Here's the encoding commands I am using in my test (I got these from here): ffmpeg -i IMG_0113.mp4 -c:v libvpx-vp9 -s 160x90 -b:v 25k -g 1 -tile-columns 4 -frame-parallel 1 -an -f webm -dash 1 video_160x90_25k.webm ffmpeg -i IMG_0113.mp4 -c:v libvpx-vp9 -s 160x90 -b:v 50k -g 1 -tile-columns 4 -frame-parallel 1 -an -f webm -dash 1 video_160x90_50k.webm ffmpeg