I am wanting to use a webcam to record video and have two options. First is using Flash/AS3 with Flash Media Server - I have this one done really and it works fine but I can't quite get the quality I'd like. Well, the Win8 camera app will record 1920x1080 video at 30fps with the same webcam. So, I was thinking I could use powershell to control the app - I'd need to send space to start/stop the recording, and be able to swap the camera application back and forth with another, gallery application, that shows the recordings.
I also need to be able to send the start/stop recording command on input from a tcp socket - which from reading seems to be doable.
So, is this something for powershell? I've been experimenting and can't reliably access the camera app. Maybe because it's a metro app? Thanks for any tips.
You can't really access or interact with Metro apps from PowerShell. There are a limited number of WinRT APIs that can be accessed from the desktop. The Windows.Media.Capture.MediaCapture type is accessible from the desktop. However using WinRT in PowerShell is really challenging given that there are a lot of async APIs in WinRT. Take a look at this blog post I wrote on what it takes to use WinRT APIs in PowerShell.
Related
I ran into this problem in Safari where it appears that WebRTC is not fully supported. So when I call
navigator.webkitGetuserMedia()
I get an undefined error.
So my question to the community is what is the best way to write a Meteor app that captures Video on a mobile device and saves it on the said device.
If you have done this, I would appreciate it very much if you could share with me and the community how you went about this.
Specific Answer
The modern API is: navigator.mediaDevices.getUserMedia(constraints). See the docs here.
In the past, I've been unsuccessful with getUserMedia on iOS, but according to this post it can be done on iOS 11.
As for saving it, you can write to the browser's file system, but that API is only supported in Chrome. If you want to write to the camera roll, you'd need native code in the mix.
General Advice
I've spent several years of my life dealing with recording, uploading, and processing video using meteor. If you are doing anything more than trivial web recording, these observations may save you some time:
Chrome (on everything but iOS) has the best API for web recording. If you can require chrome for recording, that's ideal. Firefox is a close second, only because it doesn't support the file system API.
If you need to record and upload long videos on iOS, build a native app. Don't consider any kind of hybrid - that's a serious trap. The number of corner cases and things you need to check is pretty astounding, and the only way to get over those hurdles is with native code.
I want to build a facebook app featuring a personalized video which imports content assets from the user's facebook profile and their extended social graph and integrates these assets within the timeline. I am thinking of using Flash however a key stipulation is that the app works on mobile - and so I would need to use HTML5. My question is: Can I use Flash to build the application and then compile the app as HTML5 - or is there an alternative solution in the form of a HTML5 video toolkit with a programming layer that would allow me to build a web app / access the Facebook API?
I have done this a few times over the years and yes flash was the easiest however there are a few options which you have available to you that I know of which will be purely HTML5 based, personally I'd stay away from flash here as it will end up just getting int he way:
1- The cleanest method is to use a video compositing tool on the server side which can be programmed to accept variables. Personally I have only ever done this using ffmpeg however there a couple of alternatives which are out there.
The basic process would be to grab the media from FB then to composite them at certain point on top/below/around a base video which is sitting on the server using a shell script which you then pass the media assets to as variables. There are so many options as to how you might want this to be done, probably best id to have a look at some of these examples:
http://broadcasterproject.wordpress.com/2010/05/18/how-to-layerremix-videos-with-free-command-line-tools/
http://graphcomp.com/ffmpeg/
ffmpeg watermark without vhook?
note that last time I did this I used vhooks and custom filters, vhooks are now deprecated
This method will mean a reasonably heavy server load if your app is popular but it's probably the most robust across devices etc.
2- Use Popcorn.js, and let the processing be done on the client side. you could hard code it using css/js/html but popcorn is pretty stable although I havent seen how it runs on devices but in theory it should work (all standardized technologies). Basically the process would be to use javascript to fire the display of images overlayed on the video base file at preset cue points. Popcorn has all of the methods and means for you to do this already.
Hope this helps a bit. Good luck, sounds fun.
we realised some interactive video apps and one recent project was quite like your question describes.
We used adobe flash to track the motion - and published the project via create.js. You could have an image sequence from within create.js or put a video in a layer behind. This video would then control the player head time of the create.js motion tracked sequence via jquery.
worked fine - here a link to a testsetup with an image sequence.
Video Integration would be the next step.
http://www.jungeroemer.net/projekte/testpersvid/elftest01.html
(German text, sorry but it's nothing important to read there.
Just click the images and go for it)
you can download the sources from the link, if you need i can also upload the flash file to show you the motion tracking.
Ok, so I'm working on a project that will allow users to record themselves within a browser and have the video save to the server for later watching.
Right now I have an implementation where I'm using Red5 server with Red5 Recorder and that is working fine, but I'm wondering how exactly you could go about this on an iphone as that is expected to be a large user base.
As far as my research has shown there is no universal way to gather this video within the browser as there is no HTML5 solution and Flash seems to be by far the best way to record webcam to a server.
So what I'm wondering is has anybody encountered this issue and found a solution, whether it be for Iphone only, or a universal solution that would work across all platforms.
At the moment, the only way to accomplish this on the iPhone would be to write a native application. The web browser doesn't give access to the camera, and it doesn't support Flash, Java etc.
I am creating application which is having functionality like 1 person can view video live from another iPhone, i.e. one iphone is recording and and another is viewing the same, as we do with FACE TIME, but this things to be performed by our own server.
I come to know to USE XMPP client, and also we can use google Api , but how to use and what else things are required to create such kind of application ?
Also shall we need to create own server side part or we can hire other servers , like google/gtalk or any other which is already ready.
please guide me what other things are required for the same.
thanks.
I believe that for connecting 2 devices together GStreamer is one of the best choices: it's broadly used and there's a lot of materials/docs on it.
GStreamer has a pipeline architecture that inspired by DirectShow and Quicktime, and it provides a command-line tool named gst-launch that allows you to create a pipeline and quickly test several components of the library together.
This message, shares some interesting info on how to stream video directly from the iPhone camera using gst-launch, while receiving the data on a PC through VLC. Which means, 50% of what you are looking for is already done.
Another option, also demonstrated in that message, is to use FFmpeg.
I'd like to advocate ffmpeg, which has been successfully migrated onto iOS.
What you need to do is:
1. rewrite ffserver, use camera input as the video source, and encode it by H.264/MPEG-4 encoder
2. rewrite ffplay, so that it can display video on iOS devices. The network protocol and video decoder part are ready.
I'd like to stream video from the camera on an iOS device to a receiver via wifi, in effect turning the device into a wireless webcam. Is there a way to build a small app that captures video input on an iOS app and sends it via an RTSP stream or similar?
As this is an ad hoc experiment, I'm not concerned about App Store guidelines and can jailbreak if necessary.
If I interpret your question correctly you more or less need to solve four problems:
Get the camera feed.
Convert/encode this to the right format.
Stream the data.
Prevent the phone from locking itself and going into deep sleep.
The first one is fairly simple and Apple has as always provided good documentation and examples -> API link. Make sure you check out their example in the end as you will get a CMSampleBufferRef data object back.
For the second and third part, you should check out the CFNetwork framework and specially CFFTPStream for streaming using FTP.
If your are only building this for yourself then you can always turn off the Auto-Lock feature in the settings. If you on the other hand would like to distribute this to other users you could use a trick to play a mute sound every 10 seconds. This is more or less how all the alarm clocks work in the App Store. Here's a tutorial. =)
I hope I helped a little bit at least.
Good luck and best regards!
I'm 70% of the way to doing the same thing. Here's how I did it:
Capture content from video input
Chop video into files for use in HTML Live Streaming.
Spin up a web server on the iPhone and make the video files available.
Connect to the IP address of the phone and viola! you've got live streaming video.
Last time I touched the code I was trying to debug my Live Streaming not working. I'll try and get my source code posted on github this weekend, if you'd like to take a look.