Offline Installation of FFmpeg on CentOS with Dependencies and RTSP‑to‑RTMP Streaming

The article starts by describing the need to install FFmpeg on a CentOS server that cannot access the internet, requiring offline installation of all dependencies.

1. Install nasm

Download nasm-2.14.tar.gz from

https://www.nasm.us/pub/nasm/releasebuilds/2.14/nasm-2.14.tar.gz

, upload it to /etc/nasm, extract with tar -xvf nasm-2.14.tar.gz, then run:

./configure
make && make install
nasm -version

2. Install yasm

Download yasm-1.3.0.tar.gz from

http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz

, place it in /etc/yasm, extract with tar zxvf yasm-1.3.0.tar.gz, then run:

./configure
make && make install
yasm --version

3. Install x264

Obtain the source from https://www.videolan.org/developers/x264.html, upload the .tar.bz2 file to /etc/x264, extract with tar -jxvf x264-master.tar.bz2, then configure and compile:

./configure --enable-shared --enable-static
make && make install
x264 --version

4. Verify gcc and pkg‑config

Check the compiler and pkg‑config versions:

gcc --version
pkg-config --version

Both are assumed to be present.

5. Compile FFmpeg

Download ffmpeg-6.0.tar.xz from http://ffmpeg.org/releases/ffmpeg-6.0.tar.xz (or any version from the releases page), upload to the server, extract with tar -xvf ffmpeg-6.0.tar.xz, move the source to /usr/local/ffmpeg, and run:

./configure --enable-gpl --enable-libx264 --enable-static --disable-shared \
    --enable-encoder=libx264 --extra-libs=-ldl
make && make install

If no errors appear, FFmpeg is built successfully.

6. Troubleshooting: "ERROR: x264 not found using pkg-config"

The error occurs because the default x264 installation places the .pc file in a location not searched by pkg-config. Locate the library with: find / -name 'libx264.so.164' Move the found x264.pc file to /usr/share/pkgconfig:

sudo mv /usr/local/lib/pkgconfig/x264.pc /usr/share/pkgconfig

Then add /usr/local/lib/ to /etc/ld.so.conf, run ldconfig, and re‑run the FFmpeg configure command.

7. Pull RTSP and push to RTMP

With the RTMP server listening on port 11935, execute:

ffmpeg -i "rtsp://admin:123456@camera_ip:554/h264/ch01/main/av_stream" \
    -vcodec libx264 -acodec aac -f flv rtmp://rtmp_server_ip:11935/myapp/badao

The command pulls the Hikvision RTSP stream, encodes it with libx264 and aac, and streams it as FLV to the RTMP server. Verification can be done via the media server’s preview page.