Cannot compile, using ffmpeg from sources about ffmpeg-libav-tutorial HOT 6 OPEN

Instructions for Ubuntu 20.04, using ffmpeg from master branch on git repo (as of 2021-02-28).
Asuming a "ffmpeg" directory created inside home.

1. ffmpeg repo:
   • cd ~/ffmpeg
   • git clone https://git.ffmpeg.org/ffmpeg.git repo
   • cd repo
   • ./configure --enable-gpl --disable-programs (this may vary, but the point of "disable programs" is to not replace the ffmpeg executable from ubuntu repos: we just need the libs for this tutorial).
   • make
   • sudo make install
2. ffmpeg-libav-tutorial "hello world" compilation:
   • cd ~/ffmpeg
   • git clone https://github.com/leandromoreira/ffmpeg-libav-tutorial
   • cd ffmpeg-libav-tutorial
   • gcc -g -Wall 0_hello_world.c $(pkg-config --libs libavformat libavcodec libavdevice libavfilter libavutil libswscale libswresample) -lz -o build/hello

from ffmpeg-libav-tutorial.

Hi,

I'm compiling with a different setup (on Ubuntu16 and not from ffmpeg sources) but I had a similar error, so my solution might work for you as well.

I moved all the library parameters after the source file name, like this:
gcc -g -Wall -o build/hello_world 0_hello_world.c -lavformat -lavcodec -lswscale -lavutil -lz

and I could compile successfully.

from ffmpeg-libav-tutorial.

Hi
I use Ubuntu18.04, and ffmpeg-4.0.1 source code, and use
./configure --disable-x86asm --disable-doc --prefix=output to make, make install

I use
gcc -o build/hello_world -g -Wall 0_hello_world.c -I./include -L./lib -lavformat -lavcodec -lswscale -lavutil -lswresample -lz -lm -lpthread
It could compile well

from ffmpeg-libav-tutorial.

For me, the following worked:
gcc -g -Wall -L/home/vandana/ffmpeg/ /home/vandana/ipdecoder/ffmpeg_custom/transcoding.c /home/vandana/ipdecoder/ffmpeg_custom/video_debugging.c -lavformat -lavcodec -lx264 -lavdevice -lavfilter -lavutil -lswscale -lswresample -lm -lz -lpthread -o /home/vandana/ipdecoder/ffmpeg_custom/build/transcoding

from ffmpeg-libav-tutorial.

I have same errors. How to build with CMakeLists.txt in Clion IDE of intellij?
I add -lavformat -lavcodec -lswscale -lavutil -lz to target_link_libraries but the output like /usr/bin/ld: cannot find -lavformat_alloc_context.

from ffmpeg-libav-tutorial.

I have same errors. How to build with CMakeLists.txt in Clion IDE of intellij?
I add -lavformat -lavcodec -lswscale -lavutil -lz to target_link_libraries but the output like /usr/bin/ld: cannot find -lavformat_alloc_context.

I solved:
target_link_libraries(avformat avutil). Adding other if necessary. I think with lavformat, I can drop l characer.

from ffmpeg-libav-tutorial.