Media Server :: Recording Webcam Video Quality/audio Sync?
Jan 21, 2011
I'm trying to record a stream from a webcam using FMS4 developer edition. The streams are recording on a linux box in .flv files. These files though have problems.
1 - The video quality is terrible. Fuzzy/blocky. Any kind of motion looks awful. Is there any way to improve this?
2 - The sound jumps/skips and goes out of time with the video.
As it is now this is useless. I am trying to make a system where a user records a short video from the camera and then I upload it to YouTube from my server. If you use Youtube's webcam page the video quality is quite acceptable and the audio is obviously in sync too, so they must know something I don't. [URL]..
We use a Flash component to allow a user on our web site to record from a Webcam on to our own Flash Media Server. The problem we are having is that the video in a 30 second FLV freezes at the 7th second but the audio continues. The video unfreezes after a couple of seconds but never catches up with the audio. At the very end there's a "Fast-forwarding" of video for the last few seconds so that at literally the last moment, everything's in sync. This happens for almost all of our recordings. Has anyone experienced this type of behavior?
i'm developing a web site, and i'm trying to let the user record some video from his webcam. I'm using actionscript and flash media server. I got it work in my delevoper enviroment, but when i deployed it to the production server, the webcam can't get connected to the FMS. I'm afraid this is because of port blocking from the firewall. Does anyone knows wich ports are userd for recording from a browser by the Flash Media Server? I open the 1935 port in the Flas Media Server, but it still doesn't work.
I'm currently working on a webcam recorder to record high quality video. I had the recorder working before, but the video quality was quite poor. Instead I'm trying to use a client side buffer and then upload the buffer after recording has stopped. I thought after I unattached the video and audio from the NetStream that either a NetStream.Buffer.Empty or NetStream.Record.Stop event would be sent when the buffer was finished uploading.
What is actually happening after I start recording is two NetStream.Record.Stop events are being sent in a row, so recording never really happens. Also, on the server side I'm trying to save a user name and password into a variable, but I'm not sure how to go about doing that since the application script is just a bunch of callback functions.
I'm currently able to record audio and video (from a webcam) to a Flash Media Server. However, in some cases users have a webcam with no builtin microphone. In that case the flash client uses the default microphone with 'Microphone.getMicrophone();' and possibly selects the micrphone of the PC.
A delay between audio and video is caused in cases with a separated webcam and microphone. There isn't a lot of delay on an internal network (e.g. LAN) however, there is a very large delay between audio and video on an external network (e.g. WAN).
I did a live stream last week using 282,482,832,1500Kbps streams. What would cause the audio to get out of sync with the live video stream? I'm trying to determine if it was bandwidth related, cpu/memory issue on the FMIS 4.5 server, or an issue with encoding PC exceeding it's limits?
As titled, what is the way to record video/audio files using Flash Meida Server through rmtp, and allow users to access the recorded files through http?What I am trying to do, is to record a user's microphone's input and save it to the server.fterwards, I would like other users to be able to access the recorded files and mainuplating the audio data, by computeSpectrum(), to do some visualization of the audio. As I know computeSpectrum() cannot work on streaming files, so I think I need to access the recorded files using http instead of rmtp. Is that true?
I'm creating a video chat application, and no matter what combination of Camera/Microphone/NetStream properties and functions I use, I cannot get high quality video/audio. I get occasional audio latency, pixelated video, occasional frozen video and the degree of each depends on the combination of properties/functions I set/call.
Others such as TokBox, TinyChat, Chat Roulette, etc. have achieved great video/audio quality with FMS, what is the secret? At least point me in the right direction, because right now I'm not impressed with FMS ability to provide a good video/audio experience. BTW, I'm using a P2P mesh using a group specifier, not NetStream.DIRECT_CONNECTIONS.
I have this sample code from the e-book: "Learning Flash Media Server 3". The purpose of the code is to create a FLV. The code is not running as it should. When I click on the 'record' button, the label is to change to 'recording', that dosen't seem to happen and also when I click on the 'Stop Record' button, I get the following error:
"TypeError: Error #1009: Cannot access a property or method of a null object reference.at MinRecord/stopRecord()"
[Code]....
My deduction is that the 'if' statement in the 'startRecord' function is not resolving to 'true' and hence the label is not changing to 'Recording'. Also I feel that the assingment to the variable 'ns' of type NetStream is not being done and hence in the function 'stopRecord' I get the above mentioned error message when I click on the stop button. How do I rectify these problems?
I'm trying to implement a flex app that will be able to record a video from a webcam and then upload it to a server. I've only found tutorials and examples that require a media server running such as Red5, Flash Media Server and Wowza and an open rtmp stream to the server. However, I want to know if it's possible to record a video locally and then submit it to the server with a simple HTTP request. Is there a tutorial somewhere that shows how to do this? I'm really new in flex development
I managed to record webcam stream by using the FMS developper version locally my computer.And if I try to use a remote FMS (FMS Stream EDTN 3.5 ALP), my doesn't work anymore!
import mx.rpc.http.HTTPService; import flash.net.ObjectEncoding; private var nc:NetConnection;
Is there a possibility - instead of attaching a camera [via ns.attachcamera()] to a netstream - to "attach" e.g. BitmapData to netstream. The reason is, that I use BitmapData's .draw method to get the webcam video in order to change it, such as with the .treshold method. And I want to record and save these altered bitmaps (as a video) on the FMS instead the original webcam video.
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Two videos are shown, the left one is the original from the webcam, the right one the "modified" video. Only the modified video shall be recorded via the netstream .publish method.
I'm recording a stream from a webcam as an f4v file using FMS 3.5. The file is created in the live folder, and i can stream it back to the client no problem, however when I try to play the file in Adobe Media Player (or anything else) it won't play. I've used the f4v post processor which claims to run successfully, but with no joy.
goal is to record a stream from a webcam with the best possible quality regardless the bandwith of the user.(it doesn't have to be live or broadcast, just stored on the server)
is it best to record from server side with asc script or directly from the flash player ?what are the parameters on the server that i can play with in order to cache locally the stream if the bandwith is not high enough ?
I am developing (well, trying to anyway) a service where a member can record themselves on our website using their webcam. We need to be able to record that entire webcam session they had on our website for judges to determine whether they've cheated or not (it's a competition-based service). But, I can find no documentation, articles or even a sign that this is possible (other than knowing I've seen it in use many times). And I'm not sure what kind of hosting would be most appropriate for this type of service, and what steps would be required for me to get started on this.
I want to have a website where users can record short video clips (using a webcam) and then have those videos saved on the FMS for viewing later. I've seen a lot about streaming video, but I actually want to save the video.
I'm trying to make a software which sends video and audio data to a flash media server by using RTMP protocol. Currently, my program can communicate with a flash media server correctly. RTMP specifications does not describe about the raw data in video/audio messages, so I muxed raw H.264 and AAC data into video/audio messages and sent to the server. The server seems to accept them, but a video player cannot playback the stream sending from the server. The player just says "Loading..." For a test purpose, I sniffed the network packets between Wirecast and the flash media server and ripped off only video and audio data. Then, I muxed those data into video/audio message and sent to the flash media server. In this case, the video player connected to the server can playback the stream correctly.
I checked the stream sent from Wirecast, the stream seems not to be H.264 raw data because those data are not started from 0x17 instead of H.264 start code. With those situation, I am wondering what kind of container format I should use for H.264/AAC data to the flash media server.
I have purchased flash media server and I'm looking for a way to have people record video off their webcams and have it saved to the FMS. How to do this?
I am using FMS 3.5 and Flash CS3 (though using action script 2 at the mo)What I have is a simple program that records a webcam and saves the result as an FLV. - Note, I am doing all this locally, NOT over the internet or a local server. FMS is on the same PC as the program.
1) The frames per second does not seem to be fixing to 25fps, but instead seems to be around 15fps depending upon which pc I use. I'm using: cam.setMode( 320, 240, 25 ); to set the size and frame rate in flash.
2) When I get the properties for the resulting flv, it says it is using h.263 codec. Is there a way to change the codec that is used (to say h.264)? Or is this dependent on the version of flash used? ie. would creating it in flash 9 using AS3 give a better quality result?
I'm very new to FMS and I have been experimenting around with it as a part of my job. I already have the encoder, FMS, and my AIR application all talking, so that portion is going well.The problem that I want to tackle next though is to have the FMS server record the live stream to it's hard drive. All of the guides that I've found talk about how to make a DVR stream, but that's not what I want. I want to be able to have the live stream, and then separately I would like to have it recorded.
I'm creating application where user can record voice message, problem is that recorded file is passed to other encoding servers, that requires both video and audio streams to be present.
how can I use static image to emulate webcam and attach it to NetStream?
ns = new NetStream(nc); ns.addEventListener(NetStatusEvent.NET_STATUS, watchRecording); //ns.attachCamera(cam); ns.attachAudio(mic); ns.publish(fileName.text, "record");
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Although I don't have access to application on WOWZA server I can negotiate with some one to add few lines and recompile it. So server-side solution in java is also an option here.
I ran a simple live video streaming application for the first time with actual users and ran into a couple of serious performance issues that had not turned up during testing. In this instance there was one video stream from a live web cam and used FMLE at 150 kbps using VP6 and MP3 @22k. There were 16 clients and everything worked pretty good for about 30 minutes. (although some clients said their audio and video were out of sync by up to 3 seconds)
Then individual clients would have either the video freeze or the video would continue and the audio would stop. These clints had to "disconnect" and then "connect" again to the application. This happened to all of the clients at one time or another for several minutes. I stopped and restarted the FMLE with progessively lower bandwidth settings down to 75 kbps but still clients were having the same issue.
I eventually stopped the FMLE and used the applications built in publisher at 45 kbps and that seemed to eliminate the freeze/dropping issue. But of course the video quality was very poor and some clients still reported that the audio was out of sync with the video. The server hosting the FMS application is a quad processor dell with lots of memory and network connectivity. The Flash Media Admin Console performance graph showed the total Bandwidth as 3 Mbps at maximum.
When i click record_btn, flash asks me permission to access my webcam. If i alow in the screen i am able to see live video. But I want to store the video and replay it.
I cannot get good quality in video chat. I have 3mbps line but i did not get good quality video, and my video is too slow. Also i will subscribe my FMS on influxis server.
Before I buy the Flash Media Server, I would like to know that: - Is it possible to crop the webcam video (because I need just one part of the whole picture) before streaming from the client's Flash Player to the Media Server? (it would reduce the bandwidth a lot) - If not, can the player store some parts of video until it is fully streamed with all it's data (30 fps) to the Server? (e.g: client: low bandwidth, I need all frames that the webcam records, real-time doesn't matter if it takes 1 minutes for 20sec video, that would be ok.
I am trying to broadcast live video using a webcam. I am using the developer version of FMS3.0. Actually i have a working code of webcam broadcasting, which i used before. But now i am using a free version of FMS3.0. When i tried to connect, the following error is showing:
