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An narrowing error detected by GCC 10.2.0 was fixed in the official repo (see the links in my comments below). FabioLolix have to pay attention to this page, my previous posts here and my e-mails to him.

Can someone update 'Upstream URL' and the link to the sources of Cinelerra-CV ?!

@Tio The real error should be before the lines displayed. If compile/make any c++ file the first error message is important. The next errors may be the result of the first error.

@To all Can anyone change these incorrect source link and Upstream URL ?!

Error:

make[3]: Leaving directory '/var/tmp/pamac-build-tio/cinelerra-cv/src/cinelerra-cv/cinelerra'
make[2]: *** [Makefile:1790: all-recursive] Error 1
make[2]: Leaving directory '/var/tmp/pamac-build-tio/cinelerra-cv/src/cinelerra-cv/cinelerra'
make[1]: *** [Makefile:518: all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/pamac-build-tio/cinelerra-cv/src/cinelerra-cv'
make: *** [Makefile:448: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...

Please, update the upstream url to the correct URL . You use sources from a unsupported repo. See my comments below.

Seems, the fix can be easy.

Fix the line in <sources>/cinelerra/transportque.inc:

define CHANGE_ALL 0xffffffffu

(append u to the constant)

However, may be a better fix is

define CHANGE_ALL 0xff

No more than 2 'f'-s are needed.

Someone has to test it. Make a report to CV-ML. (see the link in my previous comment)

The Cinelerra-CV project has been moved to a free platform.

So, the new official website is available at http://cinelerra-cv.wikidot.com the new official Mailing List is available at https://www.freelists.org/list/cinelerra-cv-team

the new official repo is available at https://github.com/cinelerra-cv-team/cinelerra-cv * All git users should update their remote URL to the new domain.

Cinelerra-cv is an old software and doesn't compile with modern gcc. It's time to switch to Cinelerra-GG.

yep, same error here after about 10 minutes of compiling

  CXX      playbackengine.o
In file included from vrender.h:25,
                 from playbackengine.C:41:
commonrender.h: In member function ‘virtual int CommonRender::stop_rendering()’:
commonrender.h:96:32: warning: no return statement in function returning non-void [-Wreturn-type]
   96 |  int virtual stop_rendering() {};
      |                                ^
commonrender.h: In member function ‘virtual int CommonRender::wait_device_completion()’:
commonrender.h:98:40: warning: no return statement in function returning non-void [-Wreturn-type]
   98 |  virtual int wait_device_completion() {};
      |                                        ^
commonrender.h: In member function ‘virtual int CommonRender::process_buffer(int64_t, int64_t)’:
commonrender.h:100:73: warning: no return statement in function returning non-void [-Wreturn-type]
  100 |  virtual int process_buffer(int64_t input_len, int64_t input_position) {};
      |                                                                         ^
commonrender.h: In member function ‘virtual int CommonRender::get_datatype()’:
commonrender.h:102:30: warning: no return statement in function returning non-void [-Wreturn-type]
  102 |  virtual int get_datatype() {};
      |                              ^
commonrender.h: In member function ‘virtual int64_t CommonRender::get_render_length(int64_t)’:
commonrender.h:113:68: warning: no return statement in function returning non-void [-Wreturn-type]
  113 |  virtual int64_t get_render_length(int64_t current_render_length) {};
      |                                                                    ^
In file included from mwindow.h:81,
                 from playbackengine.C:30:
playbackengine.C: In member function ‘void PlaybackEngine::perform_change()’:
transportque.inc:50:31: error: narrowing conversion of ‘4294967295’ from ‘unsigned int’ to ‘int’ [-Wnarrowing]
   50 | #define CHANGE_ALL            0xffffffff
      |                               ^~~~~~~~~~
playbackengine.C:180:8: note: in expansion of macro ‘CHANGE_ALL’
  180 |   case CHANGE_ALL:
      |        ^~~~~~~~~~
make[3]:  [Makefile:1754: playbackengine.o] Error 1
make[3]: Leaving directory '/home/abc/cinelerra-cv/src/cinelerra-cv/cinelerra'
make[2]:  [Makefile:1790: all-recursive] Error 1
make[2]: Leaving directory '/home/abc/cinelerra-cv/src/cinelerra-cv/cinelerra'
make[1]:  [Makefile:518: all-recursive] Error 1
make[1]: Leaving directory '/home/abc/cinelerra-cv/src/cinelerra-cv'
make:  [Makefile:448: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...

Got this error when building:

In file included from mwindow.h:81,
from playbackengine.C:30:
playbackengine.C: In member function ‘void PlaybackEngine::perform_change()’:
transportque.inc:50:31: error: narrowing conversion of ‘4294967295’ from ‘unsigned int’ to ‘int’ [-Wnarrowing]
50 | #define CHANGE_ALL 0xffffffff
| ^~~~~~~~~~
playbackengine.C:180:8: note: in expansion of macro ‘CHANGE_ALL’
180 | case CHANGE_ALL:
| ^~~~~~~~~~

Seems to be missing 'intltool' make dependency.