I am aiming to compile a minimal build of ffmpeg for Ubuntu. The application requires only the concat filter for .mp4s using H.264 video encoder.

I have followed this guide using the following configure options:

PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure 
  --prefix="$HOME/ffmpeg_build" 
  --pkg-config-flags="--static" 
  --extra-cflags="-I$HOME/ffmpeg_build/include" 
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" 
  --extra-libs="-lpthread -lm" 
  --ld="g++" 
  --bindir="$HOME/bin" 
  --disable-everything 
  --enable-filter=concat 
  --enable-avformat 
  --enable-avdevice 
  --enable-avcodec 
  --enable-decoder=h264 
  --enable-libx264 
  --enable-muxer=mp4 
  --enable-gpl

However running

ffmpeg -f concat -i files_to_merge.txt -c copy output.mp4

returns error

[in#0 @ 0x560ace22c640] Unknown input format: 'concat' 

I assume this is due to the omission of an enable option in the configure command.

Additionally, I would like to know if it is possible to replicate this command using C concisely, as other C API implementations of ffmpeg I have seen are very involved even for basic function.

Thanks!