Is it possible to create a web application which can record audio or video using ffmpeg or libav?
Or are these only for creating desktop aplications for encoding, decoding, recording audio/video?
It depends what platforms you are interested in.
Only PC? You can use ffmpeg or libav, but you'll need to create separate plugin for different web-browsers. Alternatives are Flash or signed Java applet loading a native module from a server.
On mobile platforms Flash is not an option usually. Usual approach is to provide a stand-alone application.
Related
I have used ffmpeg to create a MPD file for my video, and I could play and watch it on my pc using :http://dashplayer.azurewebsites.net/
now I want to make sure it works and plays appropriately on andoid and IOS, could anyone tell me how to test this file on android and IOS?
I'm not sure if you want web-based playback or native apps, so I'll try to cover both:
Android
On Android (depending on the version / browser) this should work fine.
Web
At least Chrome works, but also other browsers might. You will just need a web-player which supports DASH, e.g. Shaka Player, Bitmovin Player or dash.js.
Native apps
For native apps, you could use e.g. Google's ExoPlayer.
iOS
Assuming that you are using fragmented mp4 for your DASH content:
For iOS 10+ you could just create an HLS manifest and re-use the same segments as for DASH. For older iOS versions you will need to create MPEG-2 Transport Stream (.ts) segments plus the HLS manifest:
Web
For a web-based solution, there is currently no way to achieve MPEG-DASH playback on iOS as Safari on iOS does not provide the required JavaScript API, the Media Source Extensions (MSE).
Native apps
It could technically be possible to use MPEG-DASH, but Apple doesn't allow any other streaming format than HLS for content longer than 10 minutes, as stated in the App Store Review Guidelines:
2.5.7 Video streaming content over a cellular network longer than 10 minutes must use HTTP Live Streaming and include a baseline 192 kbps HTTP Live stream.
I came across a H.264 video which i would like to play in my c++ application. Could anyone suggest what could be the easiest way of doing it? Or What library can be used for the purpose.
Thanks in advance..
Windows API are DirectShow and Media Foundation (mind availability across Windows verions). You need a codec installed in Windows to be able to play the file, stock codec is only provided with Windows 7 editions. A choice of third party codecs is available.
Another option is to use a different framework such as ffmpeg which includes support for container formats and decoders.
In one of the project that we have undertaken we are looking for a video capture & recording library. Our groundwork (based on google search) shows that vlc (libvlc), ffmpeg (libavcodec) and gstreamer are the three popular free and open source libraries / multimedia frameworks available for the same. How do these libraries compare on the following parameters:
Licensing policy to allow use within a commercial product without the need to open source any of the components of the product that is using the library
Ability to be used effectively in a multi-threaded environment (library should be inherently thread-safe)
Easy to use and maintain
Documentation: API should be well documented...this is relative...:)
Our primary intention is to be able to capture RTSP video streams (H.264/MPEG-2/MJPEG encoded), convert these streams to raw video / frames so that it can be used for analysis / processing and later on compress these frames and store it on the disk in the form of an MP4 file (using MPEG2 / H.264 encoding).
P.S. We understand that FFmpeg is also one of the components of vlc since vlc uses libavcodec library. Is the same true for gstreamer as well? Does it have any ffmpeg dependency?
Awaiting your responses.
Regards,
Saurabh Gandhi
I suggest you to use Gstreamer.
Gstremer is multimedia framework and it has so many plug-in for various task. Plugin are one type of library. And for Capturing rtsp , converting raw video , and muxing in mp4 all have i think you will easily find out the best plug-in in Gstermer. yOU just need to write one application for this.
1. Licensing policy to allow use within a commercial product without
the need to open source any of the components of the product that is
using the library
i dont know much about this
2. Ability to be used effectively in a multi-threaded environment
(library should be inherently thread-safe)
yea Gstremer internally take care for all threading.
3. Easy to use and maintain
yea Gstremer is easy to use and maintain
4. Documentation: API should be well documented...this is relative...:)
yea Gstremer has verry well managed documented API
No Gstermer framework has no dependency on ffmpeg.but Actualy gstremer has some plugin which are based on ffmpeg. that is gst-ffmpeg
I have a mp4 file which is to be used in an application. Currently i am in the stage of figuring out the technology to be used for this job. I am familiar with flex and am hoping that i be able to use it for the application. But i can not figure out a way to play the file in flex. I have been able to play the file only in windows media player and that required the installation of three codecs : Mp4Audio.ax, Mp4Video.ax, Mp4Src.ax.
As i see it, it will be very convenient if i could embed a windows media player plugin in flex or i could specify the audio and video codecs in the flash player.
Else i will have to learn .Net, i guess.
Kindly help me out. Thanks in advance.
If you are creating an air app then you are able to start the windows-media-player using the NativeProcess. Anyway if you have a flex web app then you do not have any options on this. :(
My recommendation: Convert the video file to a valid mp4 file that can be played by flex. I suggest you to check ffmpeg library (and you could use it to convert the file to H264 format)
Environment: Windows XP/Vista, VS2008, C#/.NET 2.0, VideoGrabber.
Hi All,
I'm writing an app which captures cameras input and encodes them into a movie file (including sound).
My client suggests I encode the movie using the DivX codec. But it's not installed by default and it's not redistributable: Users would have to download, install and configure it themselves.
Is there a Codec available in default Windows (XP+) installations that I could use to encode video and sound? It must support compression. Ideally, I should be able to programmatically set basic configuration.
Note: I read this question but it doesn't actually address my needs.
TIA,
Is there a Codec available in default Windows (XP+) installations that I could use to encode video and sound?
About the best you can hope for is WMV2 (WMV v8). You may be able to encode it using qasf.dll.
The codecs you get for AVI in XP are all woeful efforts from the early days of ‘Multimedia PCs’: things like Cinepak and RLE, which are of zero use for modern full colour/resolution video, and Intel 4:2:0, which is only chroma subsampling, not really actual video compression.
If you need better than that you'll have to start embedding your own codecs, eg. from ffmpeg.
But it's not installed by default and it's not redistributable: Users would have to download, install and configure it themselves.
That's best anyway. Silently installing codecs onto a system is rather antisocial as there are often clashes between them and you could end up messing up other DirectShow applications. For example there are (at least) three different common DirectShow codecs that can handle “DivX” (which is really nothing more than MPEG-4 Advanced Simple Profile video plus MP3 audio in an AVI container): DivX, Xvid and ffdshow. Having more than one installed can be a recipe for bugs.
Not sure how useful this is to you, but I was trying to answer that very question just recently. This article suggests DIB, I420, or IYUV are supported on all platforms... at least in OpenCV. I had the least trouble with I420.