I would like to tag some parts on screen (like tagging people's head in photos in Facebook) in video (in certain second). Videos are in FLV format, video on demand. Is there any library that I can use to tag the video? or I can only use a cue point?
Environment:
Flash Media Server
Flash CS4 (ActionScript 3)
Other information can be further given. Ask me.
I don't know if there is a library (which doesn't mean there isn't any), but you could do it with cuepoints:
Create cuepoints in your video (either on encoding, or put them in on runtime via actionscript cuepoints) that have x, y, width, height as params, maybe also a duration and description.
Type for encoding cuepoints probably would be navigation, so you can get the nearest Cuepoint on seeking.
Then you need actionscript to listen for your cuepoints, and then draw those rectangles as an overlay over the video.
There is NO direct solution of this issue. I end up have to record the time in a Flash embedding the movie player and make tagging actions there.
Related
I understand how to record microphone input in AS3 from this doc.
Is it possible to record sound exactly as they are being output/played?
The reason is I applied some sound transform (via the global SoundMixer) to sounds that are currently playing; and I also want to record this sound data while it is being played.
I just saw this question, to clarify, I am not trying to record just all sounds on the user's computer (which is not possible). My flash app has a Youtube player in it (via their AS3 API), and it's playing some sounds. I applied transforms using SoundMixer.soundTransform, and I want to record what's being played when the user is playing it.
Thanks in advance.
Just a passing suggestion.. on my desktop it seems ABLE to record sound into Flash from a different tab playing Youtube (HTML5).. I don't know how it's doing that!!
I allow microphone here.. (none actually plugged in, and speaker out has in-ear headphones)
http://code.tutsplus.com/tutorials/create-a-useful-audio-recorder-app-in-actionscript-3--active-5836
PS: Anyone trying this must reduce Windows volume since anything above 10-20% is distorted audio into the Flash app.
And this HTML5 youtube trailer was recorded fine into the Wav file produced by Flash app above
http://www.youtube.com/watch?v=MVt32qoyhi0
So after a quick search it seems my Realtek Audio is classed as a Full-Duplex soundcard and also within its own control panel I have an option called "Multi-streaming" which is enabled/ticked. I think Full-Duplex is enough to do this though. Try options within your soundcard's own settings software. Don't know about your end-users. Some hardware will do it, some wont, there is no all-round solution outside of AIR (which makes desktop apps out of your AS3 code).
I am beginner to Flash.
I am having a SWF Format, I have to keep that in my html page like a video. I need a play and pause button in that video.
Thank you.
SWF file is time line based, even if you convert a movie from AVI to SWF generally there is some sort of key frames.your converting program will offer the properties of this inside the software
Easier way to control a SWF movie would be to embed your FLV into the SWF, than add key frames manually. then you can control from a parent SWF with timeline control
If your just playing a movie file in flash , it may be better to use "net-stream" this will allow you to have also full control over the movie file using cue points, this has other advantages ....quicker loading times, as the whole file would not have to be downloaded first as it allows streaming / Buffering. Using cue points has the same ability as key frames.
so your pause and play button is dependent on how you implement your video
I'm on an AS3 project, playing a video (H264). I want, for some special reasons, to go to a certain position.
a) I try it with NetStream.seek(). There it only goes to keyframes. In my current setting, this means, i can find a position every 1 second. (for a better resolution, i'd have to encode the movie with as many keyframes as possible, aka every frame a keyframe)
this is definetly not my favourite way, because I don't want to reencode all the vids.
b) I try it with NetStream.step(). This should give me the opportunity to step slowly from frame to frame. But in the documentation it says:
This method is available only when data is streaming from Flash Media Server 3.5.3 or higher and when NetStream.inBufferSeek is true.
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/NetStream.html#step()
Does this mean, it is not possible with Air for Desktop? When I try it, nothing works.
Any suggestions, how to solve this problem?
Greetings & Thank you!
Nicolas
Flash video can only be advanced by seconds unless you have Flash Media Server hosting your video. Technically, that means that you can have it working as intended in Air, however, the video would have to be streaming (silly adobe...).
You have two options:
1) Import the footage as a movieclip. The Flash IDE has a wizard for this, and if you're developing exclusively in non-FlashIDE environment, you can convert and export as an external asset such as an SWF or SWC. This would then be embedded or runtime loaded into your app giving you access to the per-frame steppable methods of MovieClip. This, however, does come with some audio syncing issues (iirc). Also, scrubbing backwards is not an MC's forté.
2) Write your own video object that loads an image sequence and displays each frame in order. You'd have to setup your own audio syncing abilities, but it might be the most direct solution apart from FLVComponent or NetStream.
I've noticed that flash player 9 scrubs nice and smooth but in players 10+ I get this no scrub problem.
My fix, was to limit frequency the calls to the seek function to <= 200ms. This fixed scrubbing but is much less smooth as player 9. Perhaps because of the "Flash video can only be advanced by seconds" limitation? I used a timer to tigger the function that calls seek() for the video.
private var scrubInterval:Timer = new Timer(200);
private function videoScrubberTouch():void {
_ns.pause();
var bounds:Rectangle = new Rectangle(0,0,340,0);
scrubInterval.addEventListener(TimerEvent.TIMER, scrubTimeline);
scrubInterval.start();
videoThumb.startDrag(false, bounds);
}
private function scrubTimeline(e:TimerEvent):void {
var amt:Number = Math.floor((videoThumb.x / 340) * duration);
trace("SCRUB duration: "+duration+" videoThumb.x: "+videoThumb.x+" amt "+amt);
_ns.seek(amt);
}
Please check this Demo link (or get the SWF file to test outside of browser via desktop Flash Player).
Note: Demo requires FLV with H.264 video codec and AAC or MP3 audio codec.
The source code for that is here: Github link
In the above demo there is (bytes-based) seeking and frame by frame stepping. The functions you want to study mainly are:
Append_SEEK ( position amount ) - This will got to the specified position in bytes and search for the nearest available keyframe.
get_frame_TAG - This will extract a tag holding one frame of data. Audio can be in frames too but lets assume you have video-only. That function is your opportunity to adjust timestamps. When it's run it will also append the tag (so each "get_frame_TAG" is also a "frame step").
For example : You have a 25fps video, you want the third-frame at 4 seconds into playback...
1000 milisecs / 25 fps = 40 units for each timestamp. So 4000 ms == 4 secs + add the 40 x 3rd frame == an expected timestamp of 4120.
So getting that frame means... First find a keyframe. Then step through each frame checking the timestamps that represent a frame you want. If it isnt then change it to the same as most recent keyframe timestamp (this forces Flash to fast-forward through the frames to keep things in sync as it assumes the frame [with smaller than expected timestamp] should have been played by that time). You can "hide" the video object during this process if you don't like the look of fast-forwarding.
Is it possible to get and set seek position of a swf file (either in ActionScript 2/3 or ActiveX API of Flash Player) ?
I tried to use frame number at first (to determine which part of the movie is being played) however sometimes whole animation has 2 frames and it does not help.
Any ideas?
Thanks.
if your loaded SWF contains all animation on the stage timeline ( i mean the top level ) then the progress you are seeking is:
var progress:Number = swf.currentFrame / swf.totalFrames;
if you want to set seek:
swf.gotoAndPlay ( progress * swf.totalFrames )
Also it can be that the all animation is not on the top level, but in the movieClip, which address you know, i mean stage.getChildByName ( 'something ).getChildeByName ('something )...
but if you have an swf where are multiple movieclips, and they are playing independantly, then nothing i can help....
Not without coding something in to the SWF as far as I know. Because animations in Flash can be in embedded MovieClips, or entirely scripted in a single frame, there is no easy way to detect the total playing time or how far an animation has progressed. Any get/seek functionality, or even a progress broadcast, would have to be scripted in the SWF and accessed through ExternalInterface.
Please be more specific about your problem. If your swf file is only 2 frames, then what is it that you are trying to seek through? Does your swf load a video, for example, and this is what you are trying to seek through? (In which case you can get properties of a video object's playback position and state).
Without more information, it's hard to provide a clear answer.
Let's say the sound input is either an embedded mp3 file or the microphone.
Is there an example of how to make it sound demonic and creepy, or like a radio transmission from the battlefield in actionscript-3 dynamically on runtime.
Reference:
http://www.youtube.com/watch?v=JAY88WH0FcU
As far as I know, you simply can't with the microphone, unless you first send it to a server.
With an audio file (embedded or not), you can distort it by playing with its bytes (ref), but its not at all a trivial task (I'm not aware of any library for "easy" sound processing).