Re: [FFmpeg-user] ffmpeg -layer flag

[Dan Walker]

@Gonzalo - Thanks for that feedback! With the channels listed in the
response I sent Carl, do you see any issues with the channel names?  These
image sequences are coming from SideFX Houdini.

When a patch is created, where would I get that?

Thanks again Gonzalo!



On Sun, Jan 19, 2020 at 1:36 PM Gonzalo Garramuño 
wrote:

>
>
> El 17/01/20 a las 23:26, Carl Eugen Hoyos escribió:
> > Am Sa., 18. Jan. 2020 um 02:47 Uhr schrieb Dan Walker <
> walkerd...@gmail.com>:
> >
> >> I'm trying to find info on the -layer flag for ffmpeg which seems to be
> >> undocumented in terms of examples.
> > 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?
> The flag seems to be somewhat broken on current head.   It should allow
> you to extract rgb (or xyz) channels from multiview EXRs. However, it
> only allows uppercase channels, like N.X or indirect_diffuse.R.
> I'll submit a patch to fix that.
>
> It does not work with OpenEXRs 2.0 multipart files (known limitation).
>
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Re: [FFmpeg-user] ffmpeg -layer flag

[Dan Walker]

/ -frames
parameters if used)
Conversion failed!

On Fri, Jan 17, 2020 at 6:26 PM Carl Eugen Hoyos  wrote:

> Am Sa., 18. Jan. 2020 um 02:47 Uhr schrieb Dan Walker <
> walkerd...@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
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[FFmpeg-user] ffmpeg -layer flag

[Dan Walker]

Hello,

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 “”)

Thanks,

Dan
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[FFmpeg-user] Convert EXR image seqs with multiple channels [AOVs] to a Quicktime

[Dan Walker]

Hello,

I'm trying to convert a set of EXR image sequences with multiple channels
[AOVs] rendered out of Houdini to a Quicktime.  The flavor of QT doesn't
concern me at the moment.

I'm just looking for a way around this. Below is my current command line
and errors associated with trying to perform the conversion.

Thanks for any help you can provide.

[dwalker@rf04 v002]$ /usr/bin/ffmpeg -y -threads 64 -r 24 -i
"/Volumes/Output/projects/groveAD/locations/ext2/opt2/004-cam09-dsk/fx/work/houdini/renders/micro/micro/v002/groveAD_ext2_opt2_004-cam09-dsk_fx_micro_v002.%04d.exr"
 -c:v prores -profile:v 3 -acodec pcm_s16le -pix_fmt yuv422p10le
"/Volumes/Output/projects/groveAD/locations/ext2/opt2/004-cam09-dsk/fx/wo
rk/houdini/renders/micro/micro/v002/groveAD_ext2_opt2_004-cam09-dsk_fx_micro_v002.mov"

ffmpeg version 2.6.8 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2
-g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches
-m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-gnutls
--enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394
--enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree
--disable-indev=jack --enable-libfreetype --enable-libgsm
--enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus
--enable-libpulse --enable-libschroedinger --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2
--enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab
--enable-avfilter --enable-avresample --enable-postproc --enable-pthreads
--disable-static --enable-shared --enable-gpl --disable-debug
--disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
  libavutil  54. 20.100 / 54. 20.100
  libavcodec 56. 26.100 / 56. 26.100
  libavformat56. 25.101 / 56. 25.101
  libavdevice56.  4.100 / 56.  4.100
  libavfilter 5. 11.102 /  5. 11.102
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale  3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc53.  3.100 / 53.  3.100
[exr @ 0x1e25f60] Unsupported channel N.x.
[exr @ 0x1e25f60] Unsupported channel N.y.
[exr @ 0x1e25f60] Unsupported channel N.z.
[exr @ 0x1e25f60] Unsupported channel P.x.
[exr @ 0x1e25f60] Unsupported channel P.y.
[exr @ 0x1e25f60] Unsupported channel P.z.
[exr @ 0x1e25f60] RGB channels not of the same depth.
[image2 @ 0x1e25140] decoding for stream 0 failed
[image2 @ 0x1e25140] Could not find codec parameters for stream 0 (Video:
exr, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
/Volumes/Output/projects/groveAD/locations/ext2/opt2/004-cam09-dsk/fx/work/houdini/renders/micro/micro/v002/groveAD_ext2_opt2_004-cam09-dsk_fx_micro_v002.%04d.exr:
could not find codec parameters
Input #0, image2, from
'/Volumes/Output/projects/groveAD/locations/ext2/opt2/004-cam09-dsk/fx/work/houdini/renders/micro/micro/v002/groveAD_ext2_opt2_004-cam09-dsk_fx_micro_v002.%04d.exr':
  Duration: 00:00:09.56, start: 0.00, bitrate: N/A
Stream #0:0: Video: exr, none, 25 tbr, 25 tbn, 25 tbc
Codec AVOption profile () specified for output file #0
(/Volumes/Output/projects/groveAD/locations/ext2/opt2/004-cam09-dsk/fx/work/houdini/renders/micro/micro/v002/groveAD_ext2_opt2_004-cam09-dsk_fx_micro_v002.mov)
has not been used for any stream. The most likely reason is either wrong
type (e.g. a video option with no video streams) or that it is a private
option of some encoder which was not actually used for any stream.
Output #0, mov, to
'/Volumes/Output/projects/groveAD/locations/ext2/opt2/004-cam09-dsk/fx/work/houdini/renders/micro/micro/v002/groveAD_ext2_opt2_004-cam09-dsk_fx_micro_v002.mov':
Output file #0 does not contain any stream
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