obs-studio/plugins/obs-ffmpeg/ffmpeg-mux/CMakeLists.txt

project(obs-ffmpeg-mux)

option(ENABLE_FFMPEG_MUX_DEBUG "Enable FFmpeg-mux debugging" OFF)

find_package(FFmpeg REQUIRED COMPONENTS avcodec avutil avformat)

add_executable(obs-ffmpeg-mux)
add_executable(OBS::ffmpeg-mux ALIAS obs-ffmpeg-mux)

target_sources(obs-ffmpeg-mux PRIVATE ffmpeg-mux.c ffmpeg-mux.h)

target_link_libraries(obs-ffmpeg-mux PRIVATE OBS::libobs FFmpeg::avcodec
                                             FFmpeg::avutil FFmpeg::avformat)
if(OS_WINDOWS)
  target_link_libraries(obs-ffmpeg-mux PRIVATE OBS::w32-pthreads)
endif()

if(ENABLE_FFMPEG_MUX_DEBUG)
  target_compile_definitions(obs-ffmpeg-mux PRIVATE ENABLE_FFMPEG_MUX_DEBUG)
endif()

set_target_properties(obs-ffmpeg-mux PROPERTIES FOLDER "plugins/obs-ffmpeg")

setup_binary_target(obs-ffmpeg-mux)
obs-ffmpeg: Move ffmpeg-mux to executable dir Instead of having ffmpeg-mux stored in a data directory, install it to the primary binary directory. On windows, this fixes ffmpeg-mux potentially accessing the wrong FFmpeg libraries (some programs install them to system32, foolishly), and instead ensures that it uses the ones that come with the program. On Linux, ensures that a binary is in its appropriate directory (/usr/bin or /usr/local/bin rather than a subset of /usr/share or /usr/local/share). 2019-03-09 16:46:40 -08:00			`project(obs-ffmpeg-mux)`
obs-ffmpeg: Add ffmpeg muxer pipe program 2015-05-28 23:10:45 -07:00
plugins: Update CMakeLists.txt for included plugins 2022-03-16 23:10:42 +01:00			`option(ENABLE_FFMPEG_MUX_DEBUG "Enable FFmpeg-mux debugging" OFF)`
obs-ffmpeg: Add ability to debug ffmpeg-mux subprocess Adds a cmake variable (DEBUG_FFMPEG_MUX) which enables FFmpeg debug output in the ffmpeg-mux subprocess, and if on Windows, shows the console window of the ffmpeg-mux subprocess so the current output can be seen. 2020-10-14 18:42:22 -07:00
plugins: Update CMakeLists.txt for included plugins 2022-03-16 23:10:42 +01:00			`find_package(FFmpeg REQUIRED COMPONENTS avcodec avutil avformat)`
obs-ffmpeg: Add ffmpeg muxer pipe program 2015-05-28 23:10:45 -07:00
plugins: Update CMakeLists.txt for included plugins 2022-03-16 23:10:42 +01:00			`add_executable(obs-ffmpeg-mux)`
			`add_executable(OBS::ffmpeg-mux ALIAS obs-ffmpeg-mux)`
obs-ffmpeg: Add ffmpeg muxer pipe program 2015-05-28 23:10:45 -07:00
plugins: Update CMakeLists.txt for included plugins 2022-03-16 23:10:42 +01:00			`target_sources(obs-ffmpeg-mux PRIVATE ffmpeg-mux.c ffmpeg-mux.h)`
obs-ffmpeg: Add ffmpeg muxer pipe program 2015-05-28 23:10:45 -07:00
plugins: Update CMakeLists.txt for included plugins 2022-03-16 23:10:42 +01:00			`target_link_libraries(obs-ffmpeg-mux PRIVATE OBS::libobs FFmpeg::avcodec`
			`FFmpeg::avutil FFmpeg::avformat)`
obs-ffmpeg: Add a circlebuf to buffer output in ffmpeg-mux This adds a circular buffer to ffmpeg-mux when writing to a file. Output from ffmpeg is buffered so that slow disk I/O does not block ffmpeg writes, as this causes the pipe to become full and OBS stops sending frames with a misleading "Encoding overloaded!" warning. The buffer may grow to 256 MB depending on the rate of data coming in and out, if the buffer is full OBS will start waiting in ffmpeg writes. A separate I/O thread is responsible for processing the contents of the buffer and writing them to the output file. It tries to process 1 MB at a time to minimize small I/O. Complicating things considerably, some formats in ffmpeg require seeking on the output, so we can't just treat everything as a stream of bytes. To handle this, we record offsets of each write and try to buffer as many contiguous writes as possible. This unfortunately makes the code quite complicated, but hopefully well commented. 2021-12-30 00:10:45 +01:00			`if(OS_WINDOWS)`
			`target_link_libraries(obs-ffmpeg-mux PRIVATE OBS::w32-pthreads)`
			`endif()`
obs-ffmpeg: Add ffmpeg muxer pipe program 2015-05-28 23:10:45 -07:00
plugins: Update CMakeLists.txt for included plugins 2022-03-16 23:10:42 +01:00			`if(ENABLE_FFMPEG_MUX_DEBUG)`
			`target_compile_definitions(obs-ffmpeg-mux PRIVATE ENABLE_FFMPEG_MUX_DEBUG)`
			`endif()`
obs-ffmpeg: Add ffmpeg muxer pipe program 2015-05-28 23:10:45 -07:00
cmake: Add cmake folders 2020-05-13 06:37:01 -07:00			`set_target_properties(obs-ffmpeg-mux PROPERTIES FOLDER "plugins/obs-ffmpeg")`

plugins: Update CMakeLists.txt for included plugins 2022-03-16 23:10:42 +01:00			`setup_binary_target(obs-ffmpeg-mux)`