[FFmpeg-devel] ProRes 4444 with Alpha Channel

[Timothy Gu]

On Aug 12, 2013 2:02 AM, <Andy_Copeland at scee.net> wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> >>On Wed, Aug 7, 2013 at 5:29 PM,  <Andy_Copeland at scee.net> wrote:
> >> -----BEGIN PGP SIGNED MESSAGE-----
> >> Hash: SHA256
> >>
> >>
> >> Hi there,
> >>
> >> We are currently investigating an automated process of generating
ProRes
> >> assets from PNG image sequences but need some help with getting the
> Alpha
> >> Channel working with ProRes 4444 on FFMPEG.
> >>
> >> We're running FFMPEG on Windows 7 x64 machines and we are sure that the
> >> Alpha Channel is preserved when the output PNG's are generated from our
> >> various different pieces of motion graphics software.
> >>
> >> The command we're using is as follows:
> >>
> >> ffmpeg -r 30 -i "c:\Users\<username>\Desktop\Cube Vibrate\results
> >> \Cube%04d.png" -vcodec prores_ks -profile:v 4444 -pix_fmt yuva444p10le
> >> - -alpha_bits 8 -acodec copy "c:\Users\<username>\Desktop\Cube Vibrate
> >> \results\cube_vibrate_10.mov"
> >>
> >> Any help that can be given on this will be SOOOOO appreciated as it's
> been
> >> stumping us for a day or so now! I'm pretty sure it's just me being
> stupid
> >> - - but want to know for sure!
> >>
> >>
> >> Thanks in advance!!
> >>
> >> ac
> >>
> >> Kind Regards,
> >>
> >> Andy Copeland
> >> Virtualisation Specialist | World Wide Studios Europe
> >> T. +44 (0)20 7859 0269
> >> Sony Computer Entertainment Europe Limited.
> >> http://uk.playstation.com/
> >>
> >
> > this question should rather go to the ffmpeg-user mailing list, so
> > when you reply to this, it probably makes sense to use or cc to the
> > ffmpeg-user list (not sure what the correct process is, someone with
> > more experience?).
> >
> > Please write what the actual problem is, i.e. what is not working and
> > then provide uncut console output of your ffmpeg run.
> >
> > My gut-feeling is that you may be using an older ffmpeg version that
> > is from the time before alpha support was added to the prores encoder
> > (not so long ago). AFAIK what you want to do should work. I have
> > tested preserving alpha from a PNG to an ffmpeg-generated prores file
> > myself.
> > _______________________________________________
> > ffmpeg-devel mailing list
> > ffmpeg-devel at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
>
> Hi there,
>
> Thanks very much for quick the reply!
>
> Have copied in FFMPEG-User as suggested.
>
> I don't suppose anyone has a compiled Windows x86 or x64 version of the
> latest FFMPEG / a version that supports Alpha channel ProRes 4444.
>
> Thanks in advance!
>
> ac
>

http://ffmpeg.org/download.html

> Andy Copeland
> Virtualisation Specialist | World Wide Studios Europe
> T. +44 (0)20 7859 0269
> Sony Computer Entertainment Europe Limited.
> http://uk.playstation.com/
>
>
> **********************************************************************
> This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they are
addressed. If you have received this email in error please notify
postmaster at scee.net
> This footnote also confirms that this email message has been checked for
all known viruses.
> Sony Computer Entertainment Europe Limited
> Registered Office: 10 Great Marlborough Street, London W1F 7LP, United
Kingdom
> Registered in England: 3277793
> **********************************************************************
>
>
> -----BEGIN PGP SIGNATURE-----
> Version: PGP Universal 3.3.0 (Build 9269)
> Charset: us-ascii
>
> wsBVAwUBUgikuIgtkn60BdOeAQi/UggAmjoIBAm0XYRRIfPDkj6Cq60EjTwQupJ+
> CWLfCMEsQlm+MAQfEHr2cTkDClGoaDww4eaeQZFXYVvaQbw7cHqWVOksHWE+woX6
> tTBbPvwtPpQrEJ1S8VcLSeIBxxWpJcBQ5GFZ9iQyVNcfLn2ftSNebJaAMlkOGaI5
> u/4V2VhtjzlAr2H5cZawOxTyDdwSGjZJhHlNVqQAeVIaTOpd6FjxRvWKIq0qJB1h
> gxnEWBWtB+O4+SaBLWF6uLuRhjKndrgg3OmFOU7BNhLesO22HW6cFt+AXOCbzuR2
> 3U6sOfvDWf/nhaSj1BrdD9nXvKt8emzIEfcVQuoiiM5fNLLNdODhsg==
> =IZIe
> -----END PGP SIGNATURE-----
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel