[FFmpeg-user] ffmpeg -layer flag

Tue Jan 21 22:31:02 EET 2020

@Carl - I did try multiple single channels at a time [ e.g. ffmpeg -layer G
-i input out.jpg ] and other layers such as [ A, N.x, P_world.G ] and each
attempt fails:

U:\> ffmpeg -layer G -i
Y:\projects\skyCity\locations\int1\opt1\008-ngt\fx\work\houdini\renders\SRain\shot08_Cam12\v003\skyCity_int1_opt1_008-ngt_fx_SRain_v003.0050.exr
Y:\projects\skyCity\locations\int1\opt1\008-ngt\fx\work\houdini\renders\SRain\shot08_Cam12\v003\out.0050.jpg

ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 7.2.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv
--enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame
--enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy
--enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
--enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid
--enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
--enable-libmfx
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[exr @ 000002785eca39a0] Channel doesn't match layer : A.
[exr @ 000002785eca39a0] Channel doesn't match layer : B.
*[exr @ 000002785eca39a0] Channel match layer : G.*
[exr @ 000002785eca39a0] Unsupported channel .
[exr @ 000002785eca39a0] Channel doesn't match layer : N.x.
[exr @ 000002785eca39a0] Unsupported channel N.x.
[exr @ 000002785eca39a0] Channel doesn't match layer : N.y.
[exr @ 000002785eca39a0] Unsupported channel N.y.
[exr @ 000002785eca39a0] Channel doesn't match layer : N.z.
[exr @ 000002785eca39a0] Unsupported channel N.z.
[exr @ 000002785eca39a0] Channel doesn't match layer : P_world.B.
[exr @ 000002785eca39a0] Unsupported channel P_world.B.
[exr @ 000002785eca39a0] Channel doesn't match layer : P_world.G.
[exr @ 000002785eca39a0] Unsupported channel P_world.G.
[exr @ 000002785eca39a0] Channel doesn't match layer : P_world.R.
[exr @ 000002785eca39a0] Unsupported channel P_world.R.
[exr @ 000002785eca39a0] Channel doesn't match layer : R.
[exr @ 000002785eca39a0] Channel doesn't match layer : Z.
[exr @ 000002785eca39a0] RGB channels not of the same depth.
[exr_pipe @ 000002785d5c6740] Stream #0: not enough frames to estimate
rate; consider increasing probesize
[exr_pipe @ 000002785d5c6740] decoding for stream 0 failed
[exr_pipe @ 000002785d5c6740] Could not find codec parameters for stream 0
(Video: exr, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
Input #0, exr_pipe, from
'Y:\projects\skyCity\locations\int1\opt1\008-ngt\fx\work\houdini\renders\SRain\shot08_Cam12\v003\skyCity_int1_opt1_008-ngt_fx_SRain_v003.0050.exr':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: exr, none, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (exr (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[exr @ 000002785d5c8520] Channel doesn't match layer : A.
[exr @ 000002785d5c8520] Channel doesn't match layer : B.
*[exr @ 000002785d5c8520] Channel match layer : G.*
[exr @ 000002785d5c8520] Unsupported channel .
[exr @ 000002785d5c8520] Channel doesn't match layer : N.x.
[exr @ 000002785d5c8520] Unsupported channel N.x.
[exr @ 000002785d5c8520] Channel doesn't match layer : N.y.
[exr @ 000002785d5c8520] Unsupported channel N.y.
[exr @ 000002785d5c8520] Channel doesn't match layer : N.z.
[exr @ 000002785d5c8520] Unsupported channel N.z.
[exr @ 000002785d5c8520] Channel doesn't match layer : P_world.B.
[exr @ 000002785d5c8520] Unsupported channel P_world.B.
[exr @ 000002785d5c8520] Channel doesn't match layer : P_world.G.
[exr @ 000002785d5c8520] Unsupported channel P_world.G.
[exr @ 000002785d5c8520] Channel doesn't match layer : P_world.R.
[exr @ 000002785d5c8520] Unsupported channel P_world.R.
[exr @ 000002785d5c8520] Channel doesn't match layer : R.
[exr @ 000002785d5c8520] Channel doesn't match layer : Z.
[exr @ 000002785d5c8520] RGB channels not of the same depth.
Error while decoding stream #0:0: Invalid data found when processing input
Finishing stream 0:0 without any data written to it.
Nothing was written into output file 0
(Y:\projects\skyCity\locations\int1\opt1\008-ngt\fx\work\houdini\renders\SRain\shot08_Cam12\v003\out.0050.jpg),
because at least one of its streams received no packets.
frame=    0 fps=0.0 q=0.0 Lsize=N/A time=-577014:32:22.77 bitrate=N/A
speed=N/A
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames
parameters if used)
Conversion failed!

On Fri, Jan 17, 2020 at 6:26 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:

> Am Sa., 18. Jan. 2020 um 02:47 Uhr schrieb Dan Walker <
> walkerdan1 at gmail.com>:
>
> > I'm trying to find info on the -layer flag for ffmpeg which seems to be
> > undocumented in terms of examples.
> >
> > I have a sequence of multilayer EXRs that I'm trying to convert to JPEG
> and
> > from the sounds of it, I would be able to extract channels in the
> > multilayer EXR [e.g. R,G,B or Diffuse, etc....] and outtput the JPEGS
> that
> > way due to ffmpeg not being able to straight up convert from mutilayer
> EXR
> > -> JPEG.
> >
> > I've scoured the web, can't find anything in terms of examples on how to
> > use this flag.
> >
> >
> https://gist.github.com/tayvano/6e2d456a9897f55025e25035478a3a50#file-gistfile1-txt-L598
> >
> > EXR AVOptions:
> > -layer .D.V…. Set the decoding layer (default “”)
>
> Seriously:
> What did you try? You write above that you have "multilayer EXR [R,G,B":
> Did
> you test ffmpeg -layer G -i input out.jpg?
>
> Carl Eugen
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".