ubuntu 源码编译ffmpeg

文章大概就是源码编译 ffmpeg，支持H265 264 编码和gdb 调试

1. 下载ffmpeg 源码 git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg
2. 下载依赖库 sudo apt-get install libx264-dev libx265-dev
3. 编译选项

./configure   --enable-gpl   --enable-libx264   --enable-libx265   --enable-shared   --enable-debug   --disable-stripping   --extra-cflags="-g"   --extra-ldflags="-g"  --prefix=`pwd`/builddir

4. make -j8
5. 生成文件如下

builddir   compat      config_components.h  configure        COPYING.GPLv2  COPYING.LGPLv2.1  CREDITS  ffbuild  ffmpeg_g  ffprobe_g  INSTALL.md  libavdevice  libavformat  libpostproc    libswscale  MAINTAINERS  presets    RELEASE  tools
Changelog  config.asm  config.h             CONTRIBUTING.md  COPYING.GPLv3  COPYING.LGPLv3    doc      ffmpeg   ffprobe   fftools    libavcodec  libavfilter  libavutil    libswresample  LICENSE.md  Makefile     README.md  test

6. make install
7. 在调试之前需要配置ffmpeg库的依赖路径
8. export LD_LIBRARY_PATH=/home/hdp/Documents/OpenSource/ffmpeg/builddir/lib

hdp@hdp-DHC88:~/Documents/OpenSource/ffmpeg$ gdb ./ffprobe_g 
GNU gdb (Ubuntu 15.0.50.20240403-0ubuntu1) 15.0.50.20240403-git
Copyright (C) 2024 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from ./ffprobe_g...
(gdb) r
Starting program: /home/hdp/Documents/OpenSource/ffmpeg/ffprobe_g 

This GDB supports auto-downloading debuginfo from the following URLs:
  <https://debuginfod.ubuntu.com>
Enable debuginfod for this session? (y or [n]) n
Debuginfod has been disabled.
To make this setting permanent, add 'set debuginfod enabled off' to .gdbinit.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
ffprobe version N-118520-g392aa9daf2 Copyright (c) 2007-2025 the FFmpeg developers
  built with gcc 13 (Ubuntu 13.3.0-6ubuntu2~24.04)
  configuration: --enable-gpl --enable-libx264 --enable-libx265 --enable-shared --enable-debug --disable-stripping --extra-cflags=-g --extra-ldflags=-g --prefix=/home/hdp/Documents/OpenSource/ffmpeg/builddir
  libavutil      59. 57.100 / 59. 57.100
  libavcodec     61. 33.102 / 61. 33.102
  libavformat    61.  9.107 / 61.  9.107
  libavdevice    61.  4.100 / 61.  4.100
  libavfilter    10.  9.100 / 10.  9.100
  libswscale      8. 13.100 /  8. 13.100
  libswresample   5.  4.100 /  5.  4.100
  libpostproc    58.  4.100 / 58.  4.100
Simple multimedia streams analyzer
usage: ffprobe [OPTIONS] INPUT_FILE

You have to specify one input file.
Use -h to get full help or, even better, run 'man ffprobe'.
[Inferior 1 (process 62429) exited with code 01]
(gdb)