Flv export with alpha

Hi everybody,
I'm having the hardest time trying to get an flv with transparency.
I have a series of numbered photoshop files. Each file contains one partially transparent layer (no mask), and when I open the files as an image sequence, the transparency looks good. However, when I export to FLV with Alpha enabled, my FLV doesn't seem to have an alpha channel.
Is there something I'm missing here?
Thanks in advance,
Brian

Try to export them as .png 24bit with alpha. Flash works well with PNG.

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Flash Player for FLV files with alpha channel encoded

My goal is to play the the transparent background flash video on the bottom right hand corner similar to the video on this website : http://www.dropshipblueprint.com/
I already have the FLV file with alpha channel encoded. I was made to understand I will need a special flash player that can read alpha channel in the flv file to make the background transparent? Is this correct? If yes, then how to accomplish this or where do I get that player, maybe opensourece player? If the player is not a solution then how do I accomplish my end objective taking into consideration I have the FLV file with the alpha channel encoded. Thanks for your help. Sam

Sam,
Welcome to the forum.
Where do you need to play this "sprite" (the name for such a Flash video)?
If you need to add that to a Video, then there could be a few challenges in PrE.
If you need to add it to a Web site, then Flash Player (free from Adobe) should be able to display that.
Can you please give us just a bit more info, on how you wish to use the sprite?
Good luck,
Hunt

FLV files exported with Alpha have extra frames after end of sequence.

Sequence is 588w x 486h Animation+ codec, talent chroma-key (Conduit) on track 2 with no background on track 1. Flash 8 is installed. When I export using the QuickTime Flash export component using On2 VP6 with Alpha Channel settings, the resulting FLV has additional frames up to around 20 seconds for a 2 minute sequence. These additional frames are a freeze of the last frame in the sequence. I tried several different sequence codecs/Spark codec with same result. Even setting an In and Out on the sequence does not help.
One symptom I have noticed, is that when I click in the timeline beyond the last frame of video, I still see the last frame of video in the Canvas (But not in the BlackMagic video card output). Normally I would see black or checkerboard.
Anybody heard of any conflicts with the Flash Export component dircect from the timeline or via a batch export.
Exporting an Item Settings QuickTime (Animation+) files and then using Flash Encoder does work, but I am trying to avoid the extra steps. (250 sequences to export)
I suspect I have an issue with the export component, but I wanted to see if anybody else has experiences this before I reinstall FCP and Flash software.

I have found what I believe the cause of the extra frames issue here, so I thought I would post it for others.
This appears to be caused by a problem between the Adobe FLV Export Component and QuickTime 7.2.  Adobe's website says that Flash encoder has issues with non 44.1 kHz audio.  Changing the sequence settings to 44.1 and rendering the audio solves the problem and FLV files exported from the timeline or via batch export are the correct length.
Exporting FLV files using either Spark or On2 VP6 with alpha, used to be a breeze with awesome results.  I do this all day to support our Flash developers.  The audio issue is easy to work around, but I also get random errors in the alpha channel of these movies now.  These single frame errors appear as black flashes.  There is nothing in the timeline that would appear to cause this.  Re-exporting sometimes fixes it, or simply moves the error somewhere else in the timeline.    This may also be related to QuickTime 7.2, but I don't know.
If anyone has experience these flashes in the alpha channel of exported FLV files please let me know how you resolved it.  This is a major productivity killer.
Thanks....

Can't export with alpha channel - Again!!!,

So, I have an intro that is designed as an overlay of the incoming video. The objects move out the way to reveal the video underneath. BUT, when I export the sequence the resulting movie has black in the background.
Now, I had this issue several months ago, and after tons of research and trial and error, all of a sudden it worked when I came back to Motion on another project. No explanation. It just worked.
Usually, I have the background set to Transparent and then export using Lossless and Alpha. Works fine. Well, not today. I've changed every export setting under the sun trying variations of Lossless with Alpha and also tried the Animation codec. No luck.
So, what is going on? Any thoughts?

Thanks for your help Patrick. I tell ya, I can't believe what's going on. As I said, this project until today has not caused me any issues what-so-ever. The other six sessions are totally fine. I also created a quick project with the same settings added text - then exported using the same settings I've used before, and it exports with the proper alpha channel.
Yet, I rebooted the Mac, made sure to delete old versions in the trash can and everything. Still, no alpha.
To keep moving forward, I literally had to use a color key in FCP to cut out the background color.
Crazy!

I want to export with alpha channel using a codec that carries less data than gopro cineform

Hi--I want to export some intermediate files with an alpha channel. i'm using gopro cineform, and these files end up being so large, meaning that i have to sit through hour long renders. is there a a codec i can use that has an alpha chanel but creates a smaller file size?
thanks

Thanks for your help Patrick. I tell ya, I can't believe what's going on. As I said, this project until today has not caused me any issues what-so-ever. The other six sessions are totally fine. I also created a quick project with the same settings added text - then exported using the same settings I've used before, and it exports with the proper alpha channel.
Yet, I rebooted the Mac, made sure to delete old versions in the trash can and everything. Still, no alpha.
To keep moving forward, I literally had to use a color key in FCP to cut out the background color.
Crazy!

DNxHD (.mxf) export with alpha channel

Hello!
I'm working with one Finnish children's feature film which will star end of this year as an DIT. Movie will include lot's of green screen and the production want's me to do chroma keyed DNxHD 36 renders with alpha channel for AVID editorial. So far I have found out that neither davinci desolve nor assimilate scratch can't do it. Is it possible to render DNxHD with alpha channel from AE? And can Avid import these files with alpha channel? All help is needed and appreciated.
Cheers
Antris

Are you sure your alpha is there? (check by pressing "a" with the mouse over the view window).
Did you try telling FCP that there is an alpha channel? If you did "Send to Shake", Final Cut Pro doesn't expect that the QuickTime it's getting back will contain an alpha channel (It's meant to match your sequence settings). You might try dragging the output directly into the browser to re-import it and see if it recognizes the alpha...
As a matter of fact, maybe you can check in QT Player, load it into QuickTime Player, cmd-j, click on the video track and play with the transparency setting. Try Straight Alpha - that should lead to the background going white - then you'll know its coming out of Shake properly and concentrate on getting FCP to recognize it...
If all else fails (I did just try it here and it worked), maybe try a TIFF or TGA sequence?
post back,
Patrick

Exporting with alpha channel and edges are ragged

I've got a short animation that is mainly a PSD of a map of NC with some animated push pins on it. I've got a local cable provider wanting an export of the animation with an alpha channel. He's using Premiere on a Mac, I'm on PC. No matter what codec I use that supports an alpha channel, the outer edge of the graphic of the State comes out ragged. Zooming in to the PSD in PhotoShop shows that the edge is antialiased, so I would imagine that this is what is causing the ragged edge on export.
Here's grab of the export. This is with QT Animation codec-quality 100, but the same results occur with DNxHD, Cineform, PNG, etc.

I think you are just seeing the extra areas of the fill.
If the output files works correctly in the editor, you should be good to go.
MtD

Can't export with alpha channel

PROBLEM: No matter what export settings I use or manipulate I can't get the exported movie to have an alpha channel.
I've read several threads on this, and none of them solved my issue. Temporarily I just imported the Motion 3 project and used it as my overlay video - it's a title intro that slides out to reveal the video underneath it.
However, I'd prefer to create self-contained QT's as there are 7 sessions.
In After Effects I'd typically choose Animation and select 'using Straight Alpha'. Motion has a preset of Lossless + Alpha Movie, or you can go to advanced and select Output tab and deselect Pre-multiply Alpha. Neither works. The exported video still has black. What's totally insane is that I was using these settings up until today and everything was fine!
And yes, I've chosen 'Transparent' under the view options and still black is always included.

We do have an answer, it's usually a simple user error: not being able to tell the alpha is really there. If you're watching in QTPlayer, you will see black. If you open the movie in FCP, you should be able to change the alpha interp to suit.
Even if OPs claim to have tried this, it's still the first thing that comes to mind and, since the OPs rarely return to tell us what REALLY happened, we are left with the assumption that this was the problem all along.
If you set your render controls to Animation with millions of color + (many of us simply forget the PLUS) and we presume there is no solid shape or opaque layer (easily missed in Motion's weird timeline display) it is fundamentally impossible not to get an alpha.
Not to say it can't happen but I've been on support forums for AE, Media 100, FCP and others for more than a decade and I have never heard of the Animation codec actually failing. It is always user error or a broken application.
I hope you folks find a new and unique solution that we can add to the list. But this is the best we know to give you: Check and recheck the easy stuff.
bogiesan

Exporting with alpha for html roll over

I am doing some animations for use on a website. so that when someone rolls over a particular element it would play a 3secong video of a Jack popping out of his box.
The video will be uploaded to the server space specified for the website.
That is the best way/format to export this animation?
Are there thisng other than resolution to consider?

Use flash. Render an h.264 and use flash to embed the movie. Any media player is going to give you a player window.
To make it mobile compatible, set your comp's frame rate to something like 6 or 10, make the comp 2X the size of your roll over to accommodate high rez displays, export an animation codec QuickTime with an alpha channel, bring the movie into Photoshop and save an animated gif from the movie. Much easier implementation too. Just use the gif as a roll over image.

EXPORT WITH ALPHA CHANNEL

I need to know how to export a clip with the alpha channel intact. I keyed a green screen shot and exported it, but everytime i open it in final cut it has a black background. Need help asap it is the last shot I have to do for a music video that has to be done by monday, thanks.

Are you sure your alpha is there? (check by pressing "a" with the mouse over the view window).
Did you try telling FCP that there is an alpha channel? If you did "Send to Shake", Final Cut Pro doesn't expect that the QuickTime it's getting back will contain an alpha channel (It's meant to match your sequence settings). You might try dragging the output directly into the browser to re-import it and see if it recognizes the alpha...
As a matter of fact, maybe you can check in QT Player, load it into QuickTime Player, cmd-j, click on the video track and play with the transparency setting. Try Straight Alpha - that should lead to the background going white - then you'll know its coming out of Shake properly and concentrate on getting FCP to recognize it...
If all else fails (I did just try it here and it worked), maybe try a TIFF or TGA sequence?
post back,
Patrick

Import QuickTime with Alpha channel into Flash CS3

Is it possible to import a QuickTime movie with alpha channel into an FLA and have the FLA recognize the Alpha channel? When I've done this, it just shows opaque black instead of an alpha channel. I need that black to be transparent so I can see the layers below the video layer.
Thanks in advance for any help.

I don't know the answer to your question.
Do you have a video player where you can verify that the alpha channel in the video is displaying as you expect?.... that is, the background is transparent?
I have used flv files with alpha and a NetStream vid player to overlay Flash video on a Web page.... but not directly in the timeline.:
http://www.mrfilmbiz.com/
the walkon... could have had other action (like Flash artwork) going on in the background... but that may not really be what you are looking for.
But lacking any other solutions, you could have your alpha channel vid file playing in one Flash file over the top of a second Flash file doing the artwork stuff.
Adninjastrator

CS4 export to.flv with Alpha dimensions problem?

Hi-
I am exporting an actress from a greenscreen shoot (original file 1920x1080p) That I want to put on a webpage.
She is keyed well and I have got to the export stage.
I have exported to flv. with alpha at various 16;9 dimensions (640x480etc) and that all works fine in Flash.
However, the actress is in the middle of the frame and the transparency is all around. Can I make the window size square? 360x360?
Therefor, cutting out some of the 'transparent' space either size and then ending up with a 360x360 file?
thanks
scott

Scott,
I do not have CS4, but believe that you can Crop your Export with FLV and the positioning should be centered. Remember, this is an assumption on my part.
Good luck,
Hunt

No Method of Batch Export for Clips with Alpha Channels?

Good morning,
As many a flustered editor has eventually discovered, in order for FCP to export sequences with alpha channels to a 32-bit format, the timeline has to be un-rendered at the time of export, or else the transparent parts will appear black in the outputted file. This sort-of makes sense if you know how FCP and render files work, but in a perfect world I think I'd have designed the export interface a bit differently. Now that I think about it, I'm actually working in an Animation (Millions of Colors +) sequence, so converting transparent areas to black makes no logical sense at all.
Anyway, I have several sequences that I would like to export as 32-bit TGA QuickTime files, preserving their transparency. If I Export Using Compressor, the process results in pre-rendering of the sequence, turning the transparent areas black. The same problem occurs if I export QuickTime reference movies from FCP and open them directly with Compressor.
Does anyone know of a way to avoid this silly phenomenon or am I stuck individually exporting each sequence from FCP, one...at.......a................time?
Thanks,
Zap

Thanks, Andy, "Batch Export" eventually did the trick!
I forgot about that tool because I've never actually had to use it before! After playing around with it for a while, I found that as long as the sequence settings for each sequence in the batch are set to a codec with an activated alpha channel, it works just fine.
Thanks again,
Zap

Export selected item as PNG with Alpha

Hello.
I'm building game graphics in Illustrator. I have thousands of individual sprites to export, up until now I've been copying and pasting in Photoshop and exporting through there, but that is tedious and slow. Inkscape has an option to export the selected object only as a PNG with alpha, pixel dimensions are equal to the current selection size. Perfect. But that means using Inkscape and quite frankly it's horrible to use.
I'm sure this must be possible, but for the life of me I can't find a working method. I found Windows scripts for CS3, but nothing for CS5 on Mac.
Can anyone help?

Should not be too hard to adapt the script for Mac, assuming it is JavaScript, not VBScript. If you can point to the source, someone might be able to fix it for you (also post in the scripting sub-forum). Other than that you can of course always make use of the slice tool and fit the slices to the objects, then export the slices.
Mylenium

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I'm adding a PNG file with alpha channel to my existing movie file using "Add to Selection and Scale".
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Yes it looks perfect in Quicktime.
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Flv export with alpha

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