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[BUG] Memory access error (memory dumped) #583

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opened 2026-01-29 16:48:26 +00:00 by claunia · 5 comments
claunia commented 2026-01-29 16:48:26 +00:00
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Originally created by @Linus789 on GitHub (Apr 23, 2020).

CCExtractor version:

CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke.
Teletext portions taken from Petr Kutalek's telxcc
--------------------------------------------------------------------------
CCExtractor detailed version info
        Version: 0.88
        Git commit: 1534d81ae75c6562fb33dcd58050d90f3e54a4b7
        Compilation date: 2020-04-23
        File SHA256: bbbb5ed6264b84a4fb91e4657c569117fd884a2730d763764d8a75d05808f198
Libraries used by CCExtractor
        Tesseract Version: 4.0.0-beta.1
        Leptonica Version: leptonica-1.75.3
        libGPAC Version: 0.7.2-DEV
        zlib: 1.2.11
        utf8proc Version: 2.4.0
        protobuf-c Version: 1.3.1
        libpng Version: 1.6.35
        FreeType 
        libhash
        nuklear
        libzvbi

In raising this issue, I confirm the following:

  • I have read and understood the contributors guide.
  • I have checked that the bug-fix I am reporting can be replicated, or that the feature I am suggesting isn't already present.
  • I have checked that the issue I'm posting isn't already reported.
  • I have checked that the issue I'm porting isn't already solved and no duplicates exist in closed issues and in opened issues
  • I have checked the pull requests tab for existing solutions/implementations to my issue/suggestion.
  • I have used the latest available version of CCExtractor to verify this issue exists.
  • I have ticked all the boxes in this section and to prove it I'm deleting the section completely to remove boilerplate text.

Necessary information

  • Is this a regression (i.e. did it work before)? NO
  • What platform did you use? Linux
  • What were the used arguments? ./ccextractor -hardsubx video.mp4 -o ocred.ssa

Video links

Additional information

Built CCExtractor with CMake
mkdir build && cd build; cmake -DWITH_OCR=on -DWITH_HARDSUBX=on ../src/ && make

$ ./ccextractor -hardsubx /home/linus/Videos/out.mp4 -o s0e1.ass
CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke.
Teletext portions taken from Petr Kutalek's telxcc
--------------------------------------------------------------------------
HardsubX (Hard Subtitle Extractor) - Burned-in subtitle extraction subsystem
Speicherzugriffsfehler (Speicherabzug geschrieben)

Memory access error (memory dumped)

Originally created by @Linus789 on GitHub (Apr 23, 2020). CCExtractor version: ``` CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke. Teletext portions taken from Petr Kutalek's telxcc -------------------------------------------------------------------------- CCExtractor detailed version info Version: 0.88 Git commit: 1534d81ae75c6562fb33dcd58050d90f3e54a4b7 Compilation date: 2020-04-23 File SHA256: bbbb5ed6264b84a4fb91e4657c569117fd884a2730d763764d8a75d05808f198 Libraries used by CCExtractor Tesseract Version: 4.0.0-beta.1 Leptonica Version: leptonica-1.75.3 libGPAC Version: 0.7.2-DEV zlib: 1.2.11 utf8proc Version: 2.4.0 protobuf-c Version: 1.3.1 libpng Version: 1.6.35 FreeType libhash nuklear libzvbi ``` # In raising this issue, I confirm the following: - [x] I have read and understood the [contributors guide](https://github.com/CCExtractor/ccextractor/blob/master/.github/CONTRIBUTING.md). - [x] I have checked that the bug-fix I am reporting can be replicated, or that the feature I am suggesting isn't already present. - [x] I have checked that the issue I'm posting isn't already reported. - [x] I have checked that the issue I'm porting isn't already solved and no duplicates exist in [closed issues](https://github.com/CCExtractor/ccextractor/issues?q=is%3Aissue+is%3Aclosed) and in [opened issues](https://github.com/CCExtractor/ccextractor/issues) - [x] I have checked the pull requests tab for existing solutions/implementations to my issue/suggestion. - [x] I have used the latest available version of CCExtractor to verify this issue exists. - [x] I have ticked all the boxes in this section and to prove it I'm deleting the section completely to remove boilerplate text. # Necessary information - Is this a regression (i.e. did it work before)? NO - What platform did you use? Linux - What were the used arguments? `./ccextractor -hardsubx video.mp4 -o ocred.ssa` # Video links * https://drive.google.com/open?id=1kJHlh1CtotjmLpmvJdzwmY7ciDjHjEZK Basically not working with any video. # Additional information Built CCExtractor with CMake `mkdir build && cd build; cmake -DWITH_OCR=on -DWITH_HARDSUBX=on ../src/ && make` ``` $ ./ccextractor -hardsubx /home/linus/Videos/out.mp4 -o s0e1.ass CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke. Teletext portions taken from Petr Kutalek's telxcc -------------------------------------------------------------------------- HardsubX (Hard Subtitle Extractor) - Burned-in subtitle extraction subsystem Speicherzugriffsfehler (Speicherabzug geschrieben) ``` `Memory access error (memory dumped)`
claunia commented 2026-01-29 16:48:28 +00:00
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@cfsmp3 commented on GitHub (Apr 23, 2020):

Not a lot of info there. I'd try compiling it with debug info and running it with valgrind. Hopefully the stacktrace will be helpful.

Also, try writing to a different format - with a with of luck, .srt will work on the same input. Fixing output is always easier.

@cfsmp3 commented on GitHub (Apr 23, 2020): Not a lot of info there. I'd try compiling it with debug info and running it with valgrind. Hopefully the stacktrace will be helpful. Also, try writing to a different format - with a with of luck, .srt will work on the same input. Fixing output is always easier.
claunia commented 2026-01-29 16:48:28 +00:00
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@Linus789 commented on GitHub (Apr 23, 2020):

cmake_debug.txt
make_debug.txt
valgrind_debug.txt

@Linus789 commented on GitHub (Apr 23, 2020): [cmake_debug.txt](https://github.com/CCExtractor/ccextractor/files/4522823/cmake_debug.txt) [make_debug.txt](https://github.com/CCExtractor/ccextractor/files/4522824/make_debug.txt) [valgrind_debug.txt](https://github.com/CCExtractor/ccextractor/files/4522826/valgrind_debug.txt)
claunia commented 2026-01-29 16:48:28 +00:00
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@muzena commented on GitHub (May 2, 2020):

@cfsmp3
I have the same problem on Linux Mint 19.
I have mkv PVR records, recorded in Tvheadend, with Happuage WinTV-HVR-2205
I tried to extract from mkv file subtitles it gives me Segmentation fault and Memory write error
I compile with these flags:
./configure --enable-hardsubx --enable-ocr --enable-ffmpeg --with-gui
I tried with ts file it gave me same error.

CCExtractor version:
CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke.
Teletext portions taken from Petr Kutalek's telxcc
CCExtractor detailed version info
Version: 0.88
Git commit: 28dd35b040
Compilation date: 2020-05-02
File SHA256: 905b6e0ba15b38ea1067514688b9257c8462739d9b4cef34718fee93d4a9049b
Libraries used by CCExtractor
Tesseract Version: 4.0.0-beta.1
Leptonica Version: leptonica-1.75.3
libGPAC Version: 0.7.2-DEV
zlib: 1.2.11
utf8proc Version: 2.4.0
protobuf-c Version: 1.3.1
libpng Version: 1.6.35
FreeType
libhash
nuklear
libzvbi

valgrind-v.txt
MKV file

@muzena commented on GitHub (May 2, 2020): @cfsmp3 I have the same problem on Linux Mint 19. I have mkv PVR records, recorded in [Tvheadend](https://github.com/tvheadend/tvheadend), with [Happuage WinTV-HVR-2205](https://www.hauppauge.co.uk/site/products/data_hvr2205board.html) I tried to extract from mkv file subtitles it gives me Segmentation fault and Memory write error I compile with these flags: ` ./configure --enable-hardsubx --enable-ocr --enable-ffmpeg --with-gui` I tried with ts file it gave me same error. CCExtractor version: CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke. Teletext portions taken from Petr Kutalek's telxcc CCExtractor detailed version info Version: 0.88 Git commit: 28dd35b040595435a8d15bf084e00b528ba2789e Compilation date: 2020-05-02 File SHA256: 905b6e0ba15b38ea1067514688b9257c8462739d9b4cef34718fee93d4a9049b Libraries used by CCExtractor Tesseract Version: 4.0.0-beta.1 Leptonica Version: leptonica-1.75.3 libGPAC Version: 0.7.2-DEV zlib: 1.2.11 utf8proc Version: 2.4.0 protobuf-c Version: 1.3.1 libpng Version: 1.6.35 FreeType libhash nuklear libzvbi [valgrind-v.txt](https://github.com/CCExtractor/ccextractor/files/4567859/valgrind-v.txt) [MKV file](https://drive.google.com/open?id=1BS_TfE_u7NfxZN5ZT3q28gI98F4xhxfq)
claunia commented 2026-01-29 16:48:28 +00:00
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@MackeyStingray commented on GitHub (Sep 13, 2020):

Seeing the same issue in Debian Buster. The issue is

../src/lib_ccx/hardsubx.c:228:18: warning: implicit declaration of function 'probe_tessdata_location' [-Wimplicit-function-declaration]
  tessdata_path = probe_tessdata_location(lang);
                  ^~~~~~~~~~~~~~~~~~~~~~~
../src/lib_ccx/hardsubx.c:228:16: warning: assignment to 'char *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
  tessdata_path = probe_tessdata_location(lang);
                ^
../src/lib_ccx/hardsubx.c:238:17: warning: assignment to 'char *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   tessdata_path = probe_tessdata_location("eng");
                 ^

Adding the line char* probe_tessdata_location(const char *lang); to src/lib_ccx/ocr.h resolves it.

@MackeyStingray commented on GitHub (Sep 13, 2020): Seeing the same issue in Debian Buster. The issue is ``` ../src/lib_ccx/hardsubx.c:228:18: warning: implicit declaration of function 'probe_tessdata_location' [-Wimplicit-function-declaration] tessdata_path = probe_tessdata_location(lang); ^~~~~~~~~~~~~~~~~~~~~~~ ../src/lib_ccx/hardsubx.c:228:16: warning: assignment to 'char *' from 'int' makes pointer from integer without a cast [-Wint-conversion] tessdata_path = probe_tessdata_location(lang); ^ ../src/lib_ccx/hardsubx.c:238:17: warning: assignment to 'char *' from 'int' makes pointer from integer without a cast [-Wint-conversion] tessdata_path = probe_tessdata_location("eng"); ^ ``` Adding the line `char* probe_tessdata_location(const char *lang);` to src/lib_ccx/ocr.h resolves it.
claunia commented 2026-01-29 16:48:29 +00:00
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@cfsmp3 commented on GitHub (May 2, 2021):

Closing as a fix has already been merged - @Linus789 please reopen if it still segfaults for you

@cfsmp3 commented on GitHub (May 2, 2021): Closing as a fix has already been merged - @Linus789 please reopen if it still segfaults for you
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