Using cwebp for batch processing

[vanessa.n...@gmail.com]

I don't seem to be able to find any option to use a directory with *names.jpg files and convert them all in one operation to *names.webp files - does this exit?

[Paul A Norman]

If on Windows, have you tried seeing if this works?

   cwebp blah blah c:\mydirectory\*.jpg    c:\myOutput\*.webp

Paul

On 10 February 2014 00:46, <vanessa.n...@gmail.com> wrote:

I don't seem to be able to find any option to use a directory with *names.jpg files and convert them all in one operation to *names.webp files - does this exit?

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[oX Triangle]

for windows u can use batchfiles

here 2 batchfiles (a simple and a complex sample)
save and edit it, produce a link of it, rename the link to a useful name,
copy the link to "sent to" directory of windows
and now u can send multiple files or one directory for a cwebp-processing

from explorer with the right-click-menu "sent to" in a easy way

########## simple batch ############

@echo off

pushd %1

for /f "delims=" %%n in ('dir /b /s /a-d-h-s') do IF NOT ".webp" == "%%~xn" (

"%~dp0cwebp.exe" -q 25 -mt -m 6 -sharpness 0 -hint graph "%%n" -o "%%n.webp")

popd

for %%i in (%1\*.*) do IF NOT ".webp" == "%%~xi" del "%%i"

Rename %1\* *. 

Rename %1\* *. 

Rename %1\* *.webp

########## complex batch ############

@echo off

title MultiWebP 2.0 by metal03326

set SETTINGS=-m 6 -pass 10 -q 80 -sns 0 -f 100

for %%i in (%1) do if exist %%~si\NUL ( goto directory ) else ( goto file )

:file

"%~dp0cwebp.exe" %SETTINGS% %1 -o %1.webp

cls

goto end

:directory

set TOPROCCESS=0

set CURRENTFILE=1

setlocal ENABLEDELAYEDEXPANSION

pushd %1

for /f "delims=" %%n in ('dir %1 /b /s /a-d-h-s') do IF NOT ".webp" == "%%~xn" (

cls

set /a TOPROCCESS+=1

echo Counting files...

echo !TOPROCCESS! files found

)

echo Found %TOPROCCESS% file(s). Starting conversion...

for /f "delims=" %%n in ('dir %1 /b /s /a-d-h-s') do IF NOT ".webp" == "%%~xn" (

cls

set /a PROCESS=!CURRENTFILE!*100/%TOPROCCESS%

echo Processing file !PROCESS!%% ^(!CURRENTFILE! of %TOPROCCESS%^)...

title MultiWebP 2.0 - !PROCESS!%% ^(!CURRENTFILE! of %TOPROCCESS%^) - by metal03326

if 33 LEQ !PROCESS! color 1F

if 67 LEQ !PROCESS! color 3F

set /a CURRENTFILE+=1

"%~dp0cwebp.exe" %SETTINGS% "%%n" -o "%%n.webp"

) ELSE (echo File already WEBP.)

endlocal

cls

echo Removing non WEBP files...

for /f "delims=" %%n in ('dir %1 /b /s /a-d-h-s') do IF NOT ".webp" == "%%~xn" del "%%n"

echo Removing double extension...

for /f "delims=" %%n in ('dir %1 /b /s /a-d-h-s') do Rename "%%n" *. 

for /f "delims=" %%n in ('dir %1 /b /s /a-d-h-s') do Rename "%%n" *. 

for /f "delims=" %%n in ('dir %1 /b /s /a-d-h-s') do Rename "%%n" *.webp

popd

:end

color 2F

echo All done!

@echo

title MultiWebP 2.0 - All done! - by metal03326

pause

[James Zern]

Hi,

On Sunday, February 9, 2014 3:46:49 AM UTC-8, webdev wrote:

I don't seem to be able to find any option to use a directory with *names.jpg files and convert them all in one operation to *names.webp files - does this exit?

This has come a few times [1]. The link has batch and shell examples, hopefully it will help.

[1] https://code.google.com/p/webp/issues/detail?id=101 

[bach99]

I mean like according to the documentation, I should be able to get a sequential batch of PNGs in a folder and put them together into an animated webp. Is this what that method achieves? Thanks.

[James Zern]

Hi,

On Thursday, October 25, 2018 at 10:40:28 AM UTC-7, bach99 wrote:

I mean like according to the documentation, I should be able to get a sequential batch of PNGs in a folder and put them together into an animated webp. Is this what that method achieves? Thanks.

cwebp is meant for a single file, to encode multiple images this method would encode each file sequentially. Currently img2webp works on multiple files all given on the command line or via a text file containing a list of command line parameters, it doesn't read a folder itself. If the documentation isn't clear we can address that, which are you referring to?

It would be possible for img2webp to read a folder, but this would limit your ability to change settings (e.g., -lossy/-lossless) for individual frames. If this doesn't matter then something like 'ls *.png > FILES; ./img2webp FILES' or 'dir *.png > FILES & ./img2webp.exe FILES' should work.

[oX Triangle]

does img2webp use multicore/hyperthreading?

mfg from berlin 

[Pascal Massimino]

Hi,

On Tue, Jan 8, 2019 at 5:16 PM oX Triangle <oxdos...@gmail.com> wrote:

does img2webp use multicore/hyperthreading?

Right now, it doesn't.

skal/

mfg from berlin 

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[feni...@gmail.com]

"via a text file containing a list of command line parameters" - could you explain, please? Maybe the example of this file...

[feni...@gmail.com]

sorry, I found the solution. But I think the documentation is not clear to everyone. The example of command: img2webp execute.txt

execute.txt should contain the FULL command, for example:

-o path_to_output\to_webp_375.webp -min_size path_to_png_1/to_webp_380001.png path_to_png_2/to_webp_380002.png path_to_png_3/to_webp_380003.png

[Pascal Massimino]

Hi,

On Fri, May 1, 2020 at 12:15 AM <feni...@gmail.com> wrote:

sorry, I found the solution. But I think the documentation is not clear to everyone. The example of command: img2webp execute.txt

execute.txt should contain the FULL command, for example:

-o path_to_output\to_webp_375.webp -min_size path_to_png_1/to_webp_380001.png path_to_png_2/to_webp_380002.png path_to_png_3/to_webp_380003.png

Indeed: the parameter file 'execute.txt' should contain all the parameters you usually pass to 'img2webp' command line.

Note that they don't have to be on the same line if it helps readability. Could be:

   -o path_to_output\to_webp_375.webp 

   -min_size

  -d 80 path_to_png_1/to_webp_380001.png 

  -d 66 path_to_png_2/to_webp_380002.png 

  -d 80 path_to_png_3/to_webp_380003.png

  etc.

for instance.

glad you found a solution,

skal/

 

On Friday, May 1, 2020 at 12:47:22 AM UTC+3, Сергей Вдовин wrote:

"via a text file containing a list of command line parameters" - could you explain, please? Maybe the example of this file...

On Friday, October 26, 2018 at 6:08:35 AM UTC+3, James Zern wrote:

Hi,

On Thursday, October 25, 2018 at 10:40:28 AM UTC-7, bach99 wrote:

I mean like according to the documentation, I should be able to get a sequential batch of PNGs in a folder and put them together into an animated webp. Is this what that method achieves? Thanks.

cwebp is meant for a single file, to encode multiple images this method would encode each file sequentially. Currently img2webp works on multiple files all given on the command line or via a text file containing a list of command line parameters, it doesn't read a folder itself. If the documentation isn't clear we can address that, which are you referring to?

It would be possible for img2webp to read a folder, but this would limit your ability to change settings (e.g., -lossy/-lossless) for individual frames. If this doesn't matter then something like 'ls *.png > FILES; ./img2webp FILES' or 'dir *.png > FILES & ./img2webp.exe FILES' should work.

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