doesn't work with Tesseract 4 ?

[Seegras]

It looks like it can't cope with tesseract 4's language data files:

open("/usr/share/tesseract-ocr/4.00/tessdata/eng.traineddata", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=4113088, ...}) = 0
read(3, "\30\0\0\0\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377"..., 4096) = 4096
write(2, "Failed loading language 'eng'\n", 30Failed loading language 'eng'
) = 30
write(2, "Tesseract couldn't load any lang"..., 39Tesseract couldn't load any languages!

[Seegras]

I'm pretty sure now this is the case. This is what happens when trying to compile it.

-- Performing Test TESSERACT_NAMESPACE - Failed
CMake Warning at CMakeModules/FindTesseract.cmake:56 (message):
You are using an old Tesseract version. Support for Tesseract 2 is
deprecated and will be removed in the future!
Call Stack (most recent call first):
CMakeLists.txt:66 (find_package)

Yes, that's tesseract 4 that's getting misindentified as tesseract 2.

[GustavoLafava]

Simply add -std=gnu++11 to CMAKE_CXX_FLAGS in CMakeLists.txt.

[Seegras]

-- Build type: Debug
CMake Warning at CMakeModules/FindTesseract.cmake:56 (message):
You are using an old Tesseract version. Support for Tesseract 2 is
deprecated and will be removed in the future!

It still misindentifies tesseract 4 as tesseract 2, and compilation still fails, but for some other (or maybe exactly the same) reason:

[ 60%] Building CXX object src/CMakeFiles/vobsub2srt.dir/vobsub2srt.c++.o
/home/user/git/VobSub2SRT/src/vobsub2srt.c++: In function ‘int main(int, char**)’:
/home/user/git/VobSub2SRT/src/vobsub2srt.c++:218:3: error: ‘TessBaseAPI’ has not been declared
TessBaseAPI::SimpleInit(tess_path, tess_lang, false); // TODO params
^~~~~~~~~~~
/home/user/git/VobSub2SRT/src/vobsub2srt.c++:220:5: error: ‘TessBaseAPI’ has not been declared
TessBaseAPI::SetVariable("tessedit_char_blacklist", blacklist.c_str());
^~~~~~~~~~~
/home/user/git/VobSub2SRT/src/vobsub2srt.c++:275:20: error: ‘TessBaseAPI’ has not been declared
char *text = TessBaseAPI::TesseractRect(image, 1, stride, 0, 0, width, height);
^~~~~~~~~~~
/home/user/git/VobSub2SRT/src/vobsub2srt.c++:314:3: error: ‘TessBaseAPI’ has not been declared
TessBaseAPI::End();
^~~~~~~~~~~
make[2]: *** [src/CMakeFiles/vobsub2srt.dir/build.make:63: src/CMakeFiles/vobsub2srt.dir/vobsub2srt.c++.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:173: src/CMakeFiles/vobsub2srt.dir/all] Error 2

[bubonic]

Simply add -std=gnu++11 to CMAKE_CXX_FLAGS in CMakeLists.txt.

Had same issue as OP and this worked for me after adding it and doing a make distclean

[olaquetal]

Simply add -std=gnu++11 to CMAKE_CXX_FLAGS in CMakeLists.txt.

Had same issue as OP and this worked for me after adding it and doing a make distclean

Works great ! thanks a lot

[marshalleq]

Can this not be added to the CMakeLists.txt file here, so we don't have to add this manually?

[bubonic]

Can this not be added to the CMakeLists.txt file here, so we don't have to add this manually?

There hasn't been an update on this git in several years. I cloned the repository and even added a few changes to the code at my own git site. I noticed with tesseract 4, different OEM engines produced significantly different results on subtitle files. I experimented with this and added a --tesseract-oem option to vobsub2srt in my git repository. I updated the README with what expectations you should have with various oem options. Play around with it a bit and test for yourself. Anyway, you can find the new VobSub2SRT git repository here:

https://github.com/bubonic/VobSub2SRT

I am in no way currently maintaining this project. It was just a self added add-on. I'll update my repository as seems fit and neccessary.

[jefro108]

There hasn't been an update on this git in several years. I cloned the repository and even added a few changes to the code at my own git site. I noticed with tesseract 4, different OEM engines produced significantly different results on subtitle files. I experimented with this and added a --tesseract-oem option to vobsub2srt in my git repository. I updated the README with what expectations you should have with various oem options. Play around with it a bit and test for yourself. Anyway, you can find the new VobSub2SRT git repository here:

https://github.com/bubonic/VobSub2SRT

@bubonic I added a fork of your repo to homebrew:

brew tap sammys/VobSub2SRT https://github.com/sammys/VobSub2SRT

and installed it by:

wget https://github.com/sammys/VobSub2SRT/raw/master/packaging/vobsub2srt.rb

brew install --HEAD vobsub2srt.rb

Not sure I needed the brew tap though

[bubonic]

@jefro108 I'm unsure how brew works, as I've never owned an Apple. I just cloned my git repo and compiled from source and everything was working as expected. Glad to hear you found a fork that works. Hope it benefits you! Best.

[trufanov-nok]

@bubonic
I'm trying to use your fork but getting

$ vobsub2srt --tesseract-oem 0 video
Error: Tesseract (legacy) engine requested, but components are not present in /usr/share/tesseract-ocr/4.00/tessdata/eng.traineddata!!
Failed loading language 'eng'
Tesseract couldn't load any languages!
Failed to initialize tesseract (OCR).

Btw, could you open the Issues page for your github project?

[bubonic]

@bubonic I'm trying to use your fork but getting

$ vobsub2srt --tesseract-oem 0 video
Error: Tesseract (legacy) engine requested, but components are not present in /usr/share/tesseract-ocr/4.00/tessdata/eng.traineddata!!
Failed loading language 'eng'
Tesseract couldn't load any languages!
Failed to initialize tesseract (OCR).

Btw, could you open the Issues page for your github project?

You need these guys installed: https://tesseract-ocr.github.io/tessdoc/Data-Files

Also, Issue page is now open