/ue5-ffmpeg-linux

Record game screen and push RTMP in UE5.0

Primary LanguageC++

(Linux Platform Only) Live Streaming / Video Capture (with ffmpeg) for UnrealEngine 5

Read the original README upstream or translation of it at this gist

  • ffmpeg 4.0.6 "Wu" Download old ffmpeg releases here

  • NVIDIA Driver v 525 (blacklist nouveau before installing)

  • Unreal Engine v 5.1.0 (download and extract)

  • Ubuntu 20.04 (22.xx will require downgrading of libssl3.x -> libssl1.x)

  • As h264_nvenc encoder is being used for remaking ffmpeg. Read more

  • Configure flags used for ffmpeg were following

     ./configure \
 --prefix="/home/lemon/debug-ffmpeg/made" \
 --enable-static \
 --enable-shared \
 --enable-nonfree \
 --enable-pic \
 --enable-ffnvcodec \
 --enable-libnpp \
 --enable-pthreads \
 --disable-doc \
 --nvcc=/usr/bin/bin/ \
 --disable-stripping \
 --disable-optimizations \
 --disable-asm \
 --extra-cflags=-I/usr/include/ \
 --extra-cflags=-I/usr/include/** \
 --extra-cflags=-I/usr/local/include/ffnvcodec \
 --extra-ldflags=-L/lib/x86_64/

  • Navigate to .uproject file and Open Copy.

Inside the Editor

  • Fix Warning once open in Unreal Editor: Actor needs a resave. Right click on WorldDataLayer-1 and Save selected actor, same for others if required.

  • Fix path of the output file in the blueprint to match UNIX filesystem

  • Save, Open Blueprint, Compile, Save and Play

  • rtmp://127.0.0.1:1935/live

Helper Note

The original author had most probably used the following flags, they were extracted from the dynamic libraries for Windows Platform. Along with the version used as ffmpeg 4.0.

Use it to your help in case of different hardware target, harware accelerators and also to reduce the size of this project by including only the encoders, protocols...etc. required rather than all.

As not all hardware accelerators are required and some features are internal to Unreal Engine, the below flags seem a little superflous

--toolchain=msvc --arch=x86 --disable-static --enable-shared --enable-libmp3lame --enable-gpl --enable-w32threads --enable-libvpx --disable-yasm --enable-nvenc --enable-cuda --enable-cuvid --enable-openal --enable-d3d11va --extra-cflags=-I../lame-3.99.5/include --extra-cflags=-I../SDL2-2.0.8/include --extra-cflags='-IH:/Pixelarama/MainCode/ExternalLibs/OpenCL/Nvidia/include' --extra-cflags=-I../libvpx --extra-cflags='-IC:/PROGRA~1/NVIDIA~2/CUDA/v9.1/include' --extra-cflags='-IH:/Pixelarama/MainCode/ExternalLibs/openal/include' --extra-cflags=-I../zlib-1.2.11/build/install/include --extra-cflags=-I../nv-codec-headers/include --extra-ldflags='-LIBPATH:H:/Pixelarama/MainCode/ExternalLibs/OpenCL/Nvidia/lib' --extra-ldflags='-LIBPATH:../lame-3.99.5/output/Release/win32' --extra-ldflags='-LIBPATH:C:/PROGRA~1/NVIDIA~2/CUDA/v9.1/lib/win32' --extra-ldflags='-LIBPATH:H:/Pixelarama/MainCode/ExternalLibs/openal/lib' --extra-ldflags='-LIBPATH:../zlib-1.2.11/build/install/lib' --extra-ldflags='-LIBPATH:../libvpx/build32/Win32/Release' --extra-ldflags='-LIBPATH:../SDL2-2.0.8/lib/x86'

TODO

  • Reduce size of libavcodec by removing unwanted encoders, decoders etc.