Hi !

I saw a .mov file that had an alpha layer (It was edited with After effects. Video Codec : Run-length encoding / FFQTRLE).
It was working well in the Kdenlive's time line with composite transition.
Is there a way to exporte a movie with a RGBA type of file with KDEnLive ?
It should be realy great for simplify composite work !

Thank You

I have learned here :
http://www.kdenlive.org/forum/export-video-image-sequence
that it's possible to export to .png sequence, but it's png without alpha...
Do you know if this fonction will be added in KDEnLive ?

**EDITED** My initial reply. Yes RGBA out from RGBA source files would be useful.

Ffmpeg (which provides codecs for Kdenlive) seems to support a few RGB codecs, but as far as I can see here:

http://www.ffmpeg.org/general.html#Supported-File-Formats_002c-Codecs-or-Features

they don't include alpha.

Ffmpeg also supports at least one codec with alpha:

AYUV X X Microsoft uncompressed packed 4:4:4:4

or posibly one more:

v408 QuickTime uncompressed 4:4:4:4 X X

Note that both are uncompressed, so get a big disk :-)

I saw those formats in your link, but nothing is writed about an alpha layer.

The only one is
PAM X X PAM is a PNM extension with alpha support.
(for encoding and decoding)

Is there a way to exporte a file in PNM format with KDEnLive ?

Thank you

This capability was only recently added to MLT:
https://github.com/mltframework/mlt/commit/f5bacc9cd22fdf91102cc11cecb4a99bd8426036

You will need to use a daily build or the build script and adjust (or create) your render profile per the commit comment.

I'm sorry for my poor knowledge. :-(
I am not able to make a script.
May be it would be nice if a real specialist add it to the (so desired) V1.0 of Kdenlive.

If you know one, you should indicate me a tutorial to make a MLT scrip and I will try anyway...

No need to write script, it exists. :-)

http://www.mltframework.org/bin/view/MLT/BuildScripts

Or daily build from http://builds.meltytech.com/kdenlive/latest.rss

hello

i NEED this information but link information is not worked:
http://www.kdenlive.org/forum/export-vi ... e-sequence

i need export png with image sequences but with background transparent..

i wait you... i need this !!!
thank you

Hi.
This is what you do:
Load a project (if you'd like).
Click the big Render button.

In Render Project I'd suggest you click
on the Destination drop-down menu
and click on Lossless / HQ.

Click on the green plus to
Create new profile.

In here you type in
a Profile name like PNG with Alpha.
Next to Extension you type in png.

In the Parameters window you type in
vcodec=png pix_fmt=rgba
Click OK.

When naming your Ouput File
be sure to name it as Name%04d.png.

The %04d will specify
the frame number in 4 digits (0032).

Click Render and you are good to go!

/Edward