-
Need Help with Chroma Keying & Flash
I shot and edited some video for a client. Taped on Beta SP, blue screen. I used FCP’s Chroma Key & Spill Suppressor filters to create an alpha channel. I reviewed the video in the canvas window, looked at the alpha channel and turned on checkerboard to make sure it was clean. The final video was exported as a QT Animation file so it would keep the alpha channel.
My client is saying that when they convert the file to flash that the key is jaggy, “hard”.
Does anyone have a suggestion?
Suzy
Producer/Editor
SOBO Productions -
8 Replies
-
DV footage? That will be steppy and jaggy…nature of that beast.
Shane
Littlefrog Post
http://www.lfhd.net -
you should probably composite the image over whatever background you need to before converting it to Flash, as Flash is heavily compressed.
-
[Suzy Shaw] ”
My client is saying that when they convert the file to flash that the key is jaggy, “hard”.Does anyone have a suggestion?”
Yeah this will be true if they are trying to do the composite and render out to Flash. You should do the full composite and let them render to Flash after you’re done.
Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html
Read my blog! https://blogs.creativecow.net/WalterBiscardi
-
Just capture your BetaCam footage as 8/10b uncompress. You will get a much better key.
Rafael -
Thanks everyone for your input. I did shoot on Beta and capture uncompressed, so I think the deal is that I need to convince my client to let me do the compositing and not them.
Cheers,
SuzyProducer/Editor
SOBO Productions -
I just read where Sorenson Squeeze has a new codec plugin for Flash alpha. You might want to check it out.. Compression Suite plus the On2 VP6 Pro codec.https://www.sorensonmedia.com/pages/?pageID=95
-
I agree, and in fact I strangely found this to be true even with footage shot on DVcam. (In my case, captured 8 bit uncompressed via AJA IoLA box).
-
Your client could be causing the issues by their encoding parameter choices. Have you checked your exported file in AfterFX (or Motion) over some background to double-check the key? If it’s clean there, too, the client’s causing it. Flash programmers try to limit bandwidth by only keying the subject over a background inside Flash. By not including the bkg in the video the data rate needs are much less. If they’re not using the On2 VP6 codec they should.
John
Dual 2.5 G5 4 gigs RAM OS 10.4.8 QT7.1.3
Dual Cinema 23 Radeon 9800
FCP Studio 5 (FCP5.1.2, DVDSP4.1.1, Comp2.3, STP1.1, Motion 2.1.2)
Huge U-320R 1TB Raid 3 firmware ENG15.BIN
ATTO UL4D driver 3.50
AJA IO driver 2.1 firmware v23-28
Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neuman U87s, Genelec Monitors, PrimaLT ISDN
Reply to this Discussion! Login or Sign Up