[hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

First, thanks to everyone for their suggestions and tips!! I'm going to 
describe my procedure and test results in detail for the benefit of people 
reading this post in the future. 

Here's my current setup:

*Computer: *
Macbook PRO 2.3 GHz i7
OS X 10.9.5

*Test Video:*
clip0076.mov
- 1080p 59.94fps
- movie is approx. 1 min 52 sec, 6,711 total frames
- file size is 419.9 MB


I'm using Hugin 2014.0.0 installed in /Applications/Hugin

I created a file named "hugin" in my paths.d folder with these paths:
/Applications/Hugin/Hugin.app/Contents/MacOS
/Applications/Hugin/Hugin.app/Contents/Resources
/Applications/Hugin/Hugin.app/Contents/Resources/HuginStitchProject.app/Contents/MacOS

This lets me run nona from the command line without having to type the full 
path

I installed FFmpeg using Homebrew:
https://trac.ffmpeg.org/wiki/CompilationGuide/MacOSX



*TEST RESULTS:*

1. Use FFmpeg to split the movie into a folder of numbered images:


METHOD 1 - lossless PNG

ffmpeg -i clip0076.mov frame-%05d.png

- 21 minutes to create 6,711 PNG files totaling 29.81 GB (70X the original 
file size!) 


METHOD 2 - high quality JPG

ffmpeg -i GOPR0076clip.mov -qscale:v 2 frame-%05d.jpg

- LESS THAN 2 minutes to create 6,711 JPG files totaling 3.88 GB (more 
reasonable)


2. Use Hugin to convert all of the images to Equirectangular Panini:

Here's the bash script (slightly modified from Carlos Cartola's suggestion):

# loop on the frames
for number in $(seq 1 $total); do
  n=$(printf %05d $number)
  echo $n
  nona -o out-$n /Users/design215/Video/_hugin/test.0001.pto frame-$n.jpg
done


test.0001.pto is a Hugin .pto file that I edited. I'm using this single 
.pto file to modify all of my images because the loop feeds each filename 
to the .pto file. 

- 1 HOUR, 4 minutes to create 6,711 corrected JPG images
- Images are all 2250x1362. I prefer to crop in Premiere, not Hugin


3. Use FFmpeg to combine the corrected images back into a movie:

ffmpeg -framerate 59.94 -i out-%05d.jpg -pix_fmt yuv420p -c:v libx264 -crf 
16 output.mp4

- 8 minutes to create output.mp4
- These settings give me the original framerate, and high quality output

output.mp4:
- 2250x1362p 59.94fps
- file size is 703.6 MB
- quality looks good!




*CONCLUSION:*The total time to do the conversion with my 2 minute clip = 1 
hour, 33 minutes using PNG images, or 1 hour, 14 minutes using JPG images.

Hugin gives me complete control over the projection and I can do exactly 
what I want.

The downsides to method are:
- My test clip was less than 2 minutes. Imagine the space you need for a 10 
minute clip.
- The images are re-compressed multiple times. Even if you start with PNG 
images, they are compressed once by Hugin, and again by FFmpeg when merging 
the images back to video. I know I could have Hugin output PNGs but then I 
would need at least 60 GB just to process 2 minutes of footage!

Don't get me wrong, the final video quality is VERY GOOD!

But, I can do almost the same thing in Photoshop CS6 with fewer steps and 
no folders with thousands of files.

The downsides to using Photoshop are:
- It takes just over 2 hours to process the same 2 minute clip.
- I have much less control than I have with Hugin. I can get close but not 
exactly what I want. 

My feeling is- There HAS to be a better, more efficient way to do this. 



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[hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Hi Monkey,

Avisynth looks very interesting. I'm on a Mac but I have access to Windows 
machines. I do my editing in Adobe Premiere/After Effects CS6. The only 
reason I'm using Hugin is because it does *exactly* what I need, but only 
to single frames, one at a time. It would be nice to convert an 8 minute 
video shot at 60fps without having to convert it to 28,800 JPEGS and then 
convert it back to video. 

I really appreciate all the help given here so far and I'm currently 
experimenting with FFMPEG as suggested above by Cartola

Also, I'd like to point out that I want a PANINI equirectangular projection 
(or an adjustable Panini), not a plain Equirectangular projection. It just 
so happens that in the Hugin drop-down menu of projections, there is 
"Equirectangular Panini" and it does exactly what I want, given the lens 
horizontal field of view (HFOV) that I input.

Here is a link with TONS of stuff about the panini projection: 
http://tksharpless.net/vedutismo/Pannini/

At one point he seems to have built a video converter but it hasn't been 
supported for years and I couldn't get it to work on two different Windows 
machines. 

I'm REALLY surprised I couldn't find a plugin for Premiere that does this. 

thanks,

Robert


On Monday, July 11, 2016 at 6:55:10 PM UTC-4, Monkey wrote:
>
> I have to say I* really *think Hugin is the wrong tool for this job!
>
> If someone can help me out with the maths behind converting Fisheye to 
> Equirectangular, there is an Avisynth pluging called xyremap (written by 
> me!) which will do this in near realtime.
>
> (I seem to remember there is an .exe in the distribution which will give 
> individual transform coordinates on request, from a PTO - but I don't 
> recall finding out a way to give a full map of coordinates in one call. If 
> that could be done I could modify my plugin to read the map and apply it to 
> the video)
>
> -Monkey
>
> On Sunday, 10 July 2016 10:39:32 UTC+1, Robert Giordano wrote:
>>
>> I want to change the projection of all frames in a video from Fisheye to 
>> Equirectangular Panini. I'm not trying to stitch any images. I'm not doing 
>> a 360 video. I'm just trying to do a lens correction. I've exported a 
>> single frame from my video and Hugin changes the image perfectly. Is it 
>> possible to use Hugin to change all of the frames in the video?
>>
>> thanks,
>>
>> Robert
>>
>>
>>
>>
>>

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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Carlos, that is excellent!!

Since I'm passing each filename to nona in the loop, can I just use a 
single test.pto instead of test.$number.pto ??

Thanks again!!

On Monday, July 11, 2016 at 7:44:17 AM UTC-4, Cartola wrote:
>
> There are many documentation on the Internet on how to make a bash script. 
> Here 
> is one example .
>
> I guess here you will need basically a loop:
>
> ---
> #!/bin/bash
>
> for number in $(seq -w 1 18000); do
>   /Applications/hugin.2014.0.0/Hugin.app/Contents/MacOS/nona -o output 
> test.$number.pto test.$number.png
> done
> ---
>
> And if you install ffmpeg you can automate all the job
>
> ---
> #!/bin/bash
>
> # split the video in frames using 5 digits
> ffmpeg -i yourVideo.mp4 -qscale:v 2 frame-%05d.jpg
>
> # count the frames
> total=$(ls frame-*.jpg | wc -l)
>
> # loop on the frames
> for number in $(seq -w 1 $total); do
>   /Applications/hugin.2014.0.0/Hugin.app/Contents/MacOS/nona -o output 
> test.$number.pto frame-$number.jpg
> done
>
> ffmpeg -i output%05d.jpg final_output.mp4
> ---
>
> Bests,
>
>
>
> Carlos E G Carvalho (Cartola)
> http://cartola.org/360
> http://www.panoforum.com.br/
>
>
>

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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Unfortunately, there is no "doc" directory in my installation (maybe 
because I'm on a Mac?)

>
> There should be a nona.txt file inside the "doc" directory of your Hugin 
> installation which explains the options in a .pto file. 
>
>

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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Thanks!! That works!! I was playing with the "Write PTStitcher Script" 
option in the Hugin File menu and now I have this:
 

# PTStitcher script, written by hugin

p f16 w2250 h1362 v111  n"JPEG q94"
m g1 i0 f0 m2 p0.00784314

# output image lines
o w1920 h1080 f2 Tpp0 Tpy0 TrX0 TrY0 TrZ0 a0 b0 c0 d0 e0 g0 p0 r0 t0 
v102.88718987 y0  n""


I changed to the JPEG option and added q. Now I just have to figure out how 
to make a batch script.

Thanks everyone, this has been very interesting so far!!

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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Sorry about that!!

On Monday, July 11, 2016 at 5:37:13 AM UTC-4, Tduell wrote:
>
> On Mon, 11 Jul 2016 18:52:04 +1000, Robert Giordano <rob...@gmail.com 
> >   
> wrote: 
>
> > Okay, here's my .pto file: 
> > 
>
> ...and a 4.6MB file and a 6.4MB in your next post. 
> This is not good etiquette. 
> If you need to provide large files please do it via Dropbox or similar so 
>   
> that only those that need to access the files can do so. 
>
> Cheers, 
> -- 
> Regards, 
> Terry Duell 
>

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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Sorry about that

On Mon, Jul 11, 2016 at 5:37 AM, Terry Duell <tdu...@iinet.net.au> wrote:

> On Mon, 11 Jul 2016 18:52:04 +1000, Robert Giordano <rob2...@gmail.com>
> wrote:
>
> Okay, here's my .pto file:
>>
>>
> ...and a 4.6MB file and a 6.4MB in your next post.
> This is not good etiquette.
> If you need to provide large files please do it via Dropbox or similar so
> that only those that need to access the files can do so.
>
> Cheers,
> --
> Regards,
> Terry Duell
>
> --
> A list of frequently asked questions is available at:
> http://wiki.panotools.org/Hugin_FAQ
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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Okay this worked:

/Applications/hugin.2014.0.0/Hugin.app/Contents/MacOS/nona -o output 
test..pto test..png

and it produced output.tif

I'll have to figure out why it created a .tif instead of a .jpg



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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Thanks again Sean,

The methods you suggest are logical. That's pretty much how I attack
problems anyway. I was hoping there was a direct command to transform the
projection of an image. That would be a lot simpler (and probably faster as
far as CPU cycles go) than using the entire Hugin program.

I will try making a .pto and inspect it. It might give me some clues.

I also want to mention that I found a way to do what I want in Photoshop
CS6 but its also a bit inefficient. I could not find a way to do the
equirectangular panini directly in PS so I used several filters to achieve
a similar result. Since the images are all the same size and shape (they're
all video frames) my sequence of adjustments can be repeated across all of
them.
- I open the video file in PS and make it a "smart layer"
- I apply my sequence of filters to it (they are not applied immediately)
- I select "render video" and choose my video output options
- Then I wait just over 2 hours for PS to process 2 minutes of footage
(7200 frames) but then I have a complete .mov file.

So, the drawbacks of using PS are
1) its close but not exactly what I want, while Hugin does exactly what I
want in a single step, and
2) it takes forever and I have a fairly fast Mac.

I haven't timed how long it will take to export a video to 7200 separate
images from Premiere but that will play a factor.

I've also wondered how hard it is to make a plugin for Premiere. With all
of the thousands of things you can do in Premiere (or After Effects) I was
surprised I couldn't find a plugin that would let me change the projection
of a video. Maybe there is but I wasn't able to find it after 2 solid days
of searching.

I'll post what I find as I experiment with the .pto file in case it can
help others in the future.

Robert

On Sun, Jul 10, 2016 at 10:37 PM, Sean Greenslade <s...@seangreenslade.com>
wrote:

> On Sun, Jul 10, 2016 at 09:29:41PM -0400, Robert Giordano wrote:
> > Thanks Sean and Zoilo
> >
> > I'm doing video editing on several Mac computers, OSX 10.9.5. I won't be
> > able to install PHP on them so I'm guessing I will need a bash script?
>
> PHP is not typically used for this sort of thing, so don't worry about
> it.
>
> Unfortunately, I'm not very familiar with OSX. I do believe it has bash,
> so pretty much any bash tutorial should help you. I like this one:
>
> http://tldp.org/LDP/abs/html/
>
> > I'm not an expert at command line scripting. Is there a place where I can
> > read about command line options for Hugin? For example, is there a direct
> > command to change the projection of an image, given the lens and HFOV
> > parameters? Or do I have to create a .pto file just for this single
> > operation?
>
> My best advice here is to make a project with Hugin that does what you
> want, then save the .pto file and inspect it. Then either turn that file
> into a template or model your pto generation code after it.
>
> > I could probably look up how to get a list of files in a folder but then
> I
> > might need some help after that.
>
> Best way to tackle something like this is to draw out the overview of
> what you want to happen. e.g.:
>
> loop over files:
> generate pto with current file name
> run nona / hugin_executor / whatever
> move file to destination folder
> delete pto file
>
> Once you have that, then start implementing a bit at a time. Breaking
> the problem up makes exploring unfamiliar territory easier.
>
> --Sean
>
> --
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> http://wiki.panotools.org/Hugin_FAQ
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Re: [hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Thanks Sean and Zoilo

I'm doing video editing on several Mac computers, OSX 10.9.5. I won't be
able to install PHP on them so I'm guessing I will need a bash script?

I'm not an expert at command line scripting. Is there a place where I can
read about command line options for Hugin? For example, is there a direct
command to change the projection of an image, given the lens and HFOV
parameters? Or do I have to create a .pto file just for this single
operation?

I could probably look up how to get a list of files in a folder but then I
might need some help after that.

thanks,

Robert

On Sun, Jul 10, 2016 at 9:13 PM, Sean Greenslade <s...@seangreenslade.com>
wrote:

> On Sun, Jul 10, 2016 at 05:14:30PM -0700, Robert Giordano wrote:
> > Hi Zoilo,
> >
> > Thanks for the reply! Yes, I use Premiere CS6 and I can export the video
> to
> > folder of pictures. But if I have a 5 minute video (some are even longer)
> > that's 18,000 images!
> >
> > I can create a single .pto file but surely there must be a better way
> than
> > having to make 18,000 .pto files??
> >
> > What about making a dynamic .pto file using PHP or something? When I make
> > thumbnails on a website, I use PHP to make a list of all the images in a
> > folder, then create a thumbnail for each image in the list. Does your
> > script create 18,000 .pto files because Hugin needs all of them?
> >
> > thanks,
> >
> > Robert
>
> Sure, you can generate a .pto file using any scripting language, even
> PHP (though I would imagine python or even bash might be a bit simpler).
>
> Basically, you need a script that loops over every frame file, generates
> the pto, processes it, and saves the output file with the proper name.
> If you get clever with the script, it could scan a directory and process
> all files in it. That way, you just explode the video into a directory,
> then fire off the script.
>
> --Sean
>
> --
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[hugin-ptx] Re: Can Hugin change the projection of a video?

[Robert Giordano]

Hi Zoilo,

Thanks for the reply! Yes, I use Premiere CS6 and I can export the video to 
folder of pictures. But if I have a 5 minute video (some are even longer) 
that's 18,000 images!

I can create a single .pto file but surely there must be a better way than 
having to make 18,000 .pto files??

What about making a dynamic .pto file using PHP or something? When I make 
thumbnails on a website, I use PHP to make a list of all the images in a 
folder, then create a thumbnail for each image in the list. Does your 
script create 18,000 .pto files because Hugin needs all of them?

thanks,

Robert


On Sunday, July 10, 2016 at 7:52:24 PM UTC-4, Zoilo ABAD wrote:
>
> Hi,
>
> the best solution I have found for the moment is to 
>  - slice the video on picture (I use premiere but you can have a lot of 
> method to do that)
>  - create one template .pto with all the modification you want to do
>  - copy the template the time you have of picture (3600 times for you...)
>  - change the name of the picture inside the pto
>  - use the batch tool on hugin to import all the pto and process them
>
> I have made a little tool with processing to copy the pto and change the 
> picture name inside
> you can take a look and modify the code to make what you want
>
> If you don't know how to play with processing let me know and if I have 
> time I do a special version for you
> https://fablabwgtn.github.io/Mobile-360/post/tutorial-stitch.html
>
> Zoilo
>
>

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[hugin-ptx] Can Hugin change the projection of a video?

[Robert Giordano]

I want to change the projection of all frames in a video from Fisheye to 
Equirectangular Panini. I'm not trying to stitch any images. I'm not doing 
a 360 video. I'm just trying to do a lens correction. I've exported a 
single frame from my video and Hugin changes the image perfectly. Is it 
possible to use Hugin to change all of the frames in the video?

thanks,

Robert




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