ImageMagick writer/reader

[foxyshadis]

Originally Posted by Myrsloik

Now I've encountered another problem. I have no test images that are identified as being in a yuv-ish colorspace so I can't add support for reading them. Apparently jpeg images aren't considered yuv.

My own web hunt for this kind of image failed so sample images are requested.

Practically all JPEG images are YCbCr. (Rec.601 fullscale, to be exact.) IM just doesn't report them as such, since it converts them to RGB normally, though it also supports CMYK and Lab.

[alexxdls]

Originally Posted by Myrsloik

IMPORTANT ANNOUNCEMENT
The test2 archive has been updated. It now handles reading lists of files properly. Before it would simply return the first image over and over again due to a typo. Get it from the first post..

Thanks. It works fine now. But could you give a look on my report about VapourSynth here https://www.doom9.org/showpost.php?p...postcount=1339 and here https://www.doom9.org/showpost.php?p...postcount=1341
Please

And just one note more

import vapoursynth as vs
core = vs.get_core()
import os
core.std.LoadPlugin(path=r"d:\TOOLS\MyDCPConverter\Tools\imwri-64.dll")
core.std.LoadPlugin(path=r"d:\TOOLS\MyDCPConverter\Tools\fmtconv.dll")
vl = core.imwri.Read(r"F:\TEMP\TRAIN-DRAGON-2_TLR-G-3D_RU-XX_RU-00_51_2K_TCF_20140417_DWA_IOP-3D\REEL2\000034L.png")
vr = core.imwri.Read(r"F:\TEMP\TRAIN-DRAGON-2_TLR-G-3D_RU-XX_RU-00_51_2K_TCF_20140417_DWA_IOP-3D\REEL2\000034R.png")
v = core.std.StackHorizontal([vl,vr])
v.set_output()

With

vr = vl

the script goes well, but with

vr = core.imwri.Read(r"F:\TEMP\TRAIN-DRAGON-2_TLR-G-3D_RU-XX_RU-00_51_2K_TCF_20140417_DWA_IOP-3D\REEL2\000034L.png")

doesn't, again. But now vr equals vl. What is the difference?
It seems like I can't output video with two different imwri.Read's, doesn't it?

[Myrsloik]

It actually appears to be because of how imagemagick was compiled when creating a single file plugin. The error message actually comes from pthreads. I'm trying to think of how to fix it.

Anyway, next update will have grayscale support.

[kolak]

How do I load image sequence?
I've tried test_%03d.tif, but it did not work.
Loading single files was fine.

[Myrsloik]

Originally Posted by kolak

How do I load image sequence?
I've tried test_%03d.tif, but it did not work.
Loading single files was fine.

That's how you do it. Are the files named test_000.tif, test_001.tif...?

[kolak]

Yes. It says that files can't be found. Does it have to start with 0?

[Myrsloik]

Originally Posted by kolak

Yes. It says that files can't be found.

Try using the full path. And yes, it has to start at 0 at the moment.

[kolak]

This is probably the reason. Mine starts from 1. Can we have start number as a variable?

[Myrsloik]

Originally Posted by kolak

This is probably the reason. Mine starts from 1. Can we have start number as a variable?

Yes, I'll add it for the next test version.

[kolak]

How does the writer work.

I tried
s=source...
core.imwri.Write(s, 'DPX', 'D:\test_%03d.dpx')

And put script through vspipe.
Nothing written to the disk. Script itself givses correct output.

[jackoneill]

Originally Posted by kolak

How does the writer work.

I tried
s=source...
core.imwri.Write(s, 'DPX', 'D:\test_%03d.dpx')

And put script through vspipe.
Nothing written to the disk. Script itself givses correct output.

s = source
s = core.imwri.Write(s, ...)
s.set_output()

Frames that aren't requested from imwri.Write() aren't written.

[kolak]

Thank you.
I figured it out.

[alexxdls]

Originally Posted by kolak

How do I load image sequence?
I've tried test_%03d.tif, but it did not work.
Loading single files was fine.

dir = r"dir\path/"
srcs = [dir + src for src in os.listdir(dir)]
v = core.imwri.Read(srcs)

works fine for loading images from directory

[kolak]

%xd also works, but only when your first image has number 0.

When I tried your method I had error saying:
"Don't know what os means".

[sneaker_ger]

You need "import os" at the top of your script.

[kolak]

Thx.
Will try.

[alexxdls]

Any update in near future?

[Myrsloik]

Originally Posted by alexxdls

Any update in near future?

Maybe in a day or two when I finish all the big changes. I decided to go back and redo a fairly big amount of code because the C++ api is useless.

[alexxdls]

Originally Posted by Myrsloik

Maybe in a day or two when I finish all the big changes. I decided to go back and redo a fairly big amount of code because the C++ api is useless.

Thanks. I hope you will be able to solve an issue with stacking two different image seqeunces.

[Myrsloik]

Third test and a small list of notable changes in the first post. The dllpath argument is back and so is the dll mess. I'll probably get around to making a single file dll compile some day with mingw. But that's complicated.

This should more or less be the final version. ImageMagick as a library is simply too abstracted/awkward/horrible to use to return native colorspaces. On the positive side I think it can do most important things, read and write a big pile of formats as image sequences. If I ever locate a better library to use maybe I'll have another go. And remember that ffms2 also works for image reading if you want to try something else.