expression result unused [-Wunused-value]

[upperdecker954]

Hey, I've been working at this for days upon days now trying to get my GoPro footage to come back to life. I've started with ponchio's release, but it was creating a 3kb file and giving me an error: [aac @ 0x7f89b0000a00] channel element 2.3 is not allocated

I stumbled across your fork, as you have the most recently updated version. unfortunately, I'm getting tons of warnings: expression result unused [-Wunused-value]

Theses warnings are showing for common.h.

an example error is:

7 warnings generated.
In file included from sps-info.cpp:1:
In file included from ./sps-info.h:4:
./common.h:19:2: warning: expression result unused [-Wunused-value]
        creator{ 0, ( std::cout << (std::forward<Args>(args)), 0) ... };
        ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./common.h:32:2: note: in instantiation of function template specialization 'logg<char const (&)[18]>'
      requested here
        logg(std::forward<Args>(x)...);
        ^
sps-info.cpp:25:2: note: in instantiation of function template specialization 'logg<char const (&)[18]>'
      requested here
        logg(V, "decoding SPS ...\n");
        ^
In file included from sps-info.cpp:1:
In file included from ./sps-info.h:4:
./common.h:19:2: warning: expression result unused [-Wunused-value]
        creator{ 0, ( std::cout << (std::forward<Args>(args)), 0) ... };
        ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./common.h:32:2: note: in instantiation of function template specialization 'logg<char const (&)[21], int &,
      char>' requested here
        logg(std::forward<Args>(x)...);
        ^
sps-info.cpp:32:2: note: in instantiation of function template specialization 'logg<char const (&)[21], int
      &, char>' requested here
        logg(V, "log2_max_frame_num: ", log2_max_frame_num, '\n');

Also, I had to tweak the command line when I compile everything:

g++ -o untrunc -O3 -I./libav-12.3 *.cpp -L./libav-12.3/libavformat -lavformat -L./libav-12.3/libavcodec -lavcodec -L./libav-12.3/libavresample -lavresample -L./libav-12.3/libavutil -lavutil -lpthread -lz -framework CoreFoundation -framework CoreVideo -framework VideoDecodeAcceleration -std=c++11 -lbz2

any help would be great

[upperdecker954]

I should probably also add, that I tried to ignore the warnings...but it actually did less than poncho's release:

./untrunc -i good.MP4 bad.mp4
Info: reading good.MP4
Info: parsing healthy moov atom ... 
Info: avcC got decoded
No codec found!

[anthwlock]

Hi, compile with this: g++ -o untrunc -O3 *.cpp -lavformat -lavcodec -lavutil. No internal libav source is needed. If you upload an example I will take a look. These warnings shouldn't be much of a problem.

[anthwlock]

closing this because of inactivity.