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Elephants Dream - Cover of the soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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Mis à jour : Février 2013
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Publier une image simplement
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Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
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Sur d’autres sites (10452)
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Encode Frames to Video with C Library
31 juillet 2018, par NetherGraniteFor the sake of continuity, let us assume "RGB values" are the following :
typedef struct RGB {
uint8_t r, g, b;
} rgb;However, if you feel that a different color space is more appropriate for this question, please use that instead.
How might I go about writing 2D arrays of RGB values to a video in C given an output format and framerate ?
Before I continue, I should specify that I wish to be able to do this all within one program. I am trying to add functionality to an application that would allow it to compile videos frame by frame without having to leave it.
Additionally, my needs for this functionality are extremely basic ; I simply need to be able to set individual pixels to certain colors.
The closest I have come to a solution so far is the C library FFmpeg. Allow me to describe what I was able to learn on my own :
After looking through its documentation, I came across the function
avcodec_send_frame(avctx, frame), whose parameters are of the typesAVCodexContext*andconst AVFrame*respectively. If these are not the right tools for what I am trying to do, please ignore the rest of the question and instead point me towards what I should be using.However, I do not know which fields of
avctxandframemust be set manually and which do not. The reason I assume some do not is because both are extremely large structures, but correct me if I am wrong.Question 1 : What values of an
AVCodecContextandAVFramemust be set ? Of these, what is/are the recommended value(s) for each of them ?Additionally, I was only able to find instructions on how to initialize an
AVFrame(usingav_frame_alloc()andav_frame_get_buffer()) but not for anAVCodexConstant.Question 2 : Is there a proper way to initialize an
AVCodexConstant? And just in case, is the method of initializing anAVFramedescribed above correct ? Do any of the fields of either have a proper method of initialization ?Also, I was not able to find official documentation on how to take this
AVCodexConstant(which I assume contains the video information) and turn it into a video. I apologize if the documentation for this is easy to find and I just missed it.Question 3 : How do I turn an
AVCodexConstantinto a file of a given format ?And, given my limited knowledge :
Question 4 : Are there any other parts to this process that I am missing, and do I have any of the above parts wrong ?
Please keep in mind that I found out about FFmpeg for the first time very recently, and as a result, I am a complete beginner to this. Additionally, my experience with C is very limited, so I would greatly appreciate it if you could note which files need to be included with
#include.Feel free to even go as far as recommending something other than FFmpeg, just as long as it is written in C. I do not need power-user options, but I would greatly prefer flexibility in what audio and video file types the library can handle.
Addressing Potential Duplicates
I appologize for how long this section is ; I just want to have my bases covered. I heavily apologize, however, if this is in fact a duplicate of a question that I was just unable to find.
- ffmpeg C API documentation/tutorial [closed] — This question was too open-ended and received answers pointing the asker towards a tutorial at dranger.com, a tutorial that confusingly muddied the waters by focusing heavily on a graphics library of choice. Please do not take this as me saying it is bad ; I am just enough of a beginner that I could not wade through it all.
- Encoding frames to video with ffmpeg — Although this question seems to have been asking the same thing, it is geared towards Unreal Engine 4, and the asker provided sample code, making it difficult for me to understand which of parts of the accepted answer were necessary for me and which were not.
- How to write frames to a video file ? — While this also asked the same thing, the accepted answer simply provides a command instead of an explanation of code.
- YUV Raw frames to video stream — While the accepted answer for this question is a command, the question states that it is looking for a way to encode frames generated by C++ code. Is there some way to run commands in code that I haven’t been able to find ?
- Converting sequenced frames to video — Not only is the asker’s code written in Python, but it also seems to use already-existing image files as frames.
- How to write bitmaps as frames to H.264 with x264 in C\C++ ? — The accepted answer seems to describe a process that would take multiple applications, but I could be wrong as I am enough of a beginner that I am not sure exactly what it means other than Step 3.
- How to write bitmaps as frames to Ogg Theora in C\C++ ? — Although it isn’t a problem that the question specifies the ogg format, it is a problem that the accepted answer suggests libtheora, which appears to only work with ogg files.
-
Compile Shotdetect on CentOS 7
14 septembre 2015, par BitLegacy01I’m migrating a service from a Debian server to a CentOS 7 one.
The service needs the Shotdetect command (github , official site).
I could not make it work on CentOS though I followed all steps :
-
Compile ffmpeg compilation guide
# ffmpeg
ffmpeg version git-2015-08-21-7a806c6 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.8.3 (GCC) 20140911 (Red Hat 4.8.3-9)
configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --disable-libmp3lame --disable-libopus --disable-libvorbis --disable-libvpx --enable-libx264 --disable-libx265 --disable-lzma
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 58.100 / 56. 58.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 36.100 / 5. 36.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...-
Install needed packages
# yum install gd-devel libxml2-devel libxslt-devel clang libvpx libvorbis -
Add pthread in the CMakeList file, in TARGET_LINK_LIBRARIES, because it throws an lpthread missing in linker error
-
Compile Shotdetect
# FFMPEG_DIR="/root/ffmpeg_build" ./compile.sh cmd
-
5.Lost in contemplation
-- avformat library found: /root/ffmpeg_build/lib/libavformat.a
-- avcodec library found: /root/ffmpeg_build/lib/libavcodec.a
-- avutil library found: /root/ffmpeg_build/lib/libavutil.a
-- swscale library found: /root/ffmpeg_build/lib/libswscale.a
Found all FFmpeg libraries in /root/ffmpeg_build/lib/libavformat.a;/root/ffmpeg_build/lib/libavdevice.a;/root/ffmpeg_build/lib/libavcodec.a;/root/ffmpeg_build/lib/libavutil.a;/root/ffmpeg_build/lib/libswscale.a.
-- Found GD: /usr/lib64/libgd.so
Found libgd: /usr/lib64/libgd.so;/usr/lib64/libpng.so;/usr/lib64/libz.so;/usr/lib64/libjpeg.so in /usr/include
Found libxml2: /usr/lib64/libxml2.so in /usr/include/libxml2
Found libxslt: /usr/lib64/libxslt.so in /usr/include
-- Configuring done
-- Generating done
-- Build files have been written to: /root/Shotdetect-master/build
[ 71%] Built target shotdetect
Linking CXX executable shotdetect-cmd
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_frame »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:323: undefined reference to « aacDecoder_Fill »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:329: undefined reference to « aacDecoder_DecodeFrame »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « get_stream_info »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:88: undefined reference to « aacDecoder_GetStreamInfo »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_close »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:201: undefined reference to « aacDecoder_Close »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_init »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:214: undefined reference to « aacDecoder_Open »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:221: undefined reference to « aacDecoder_ConfigRaw »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:228: undefined reference to « aacDecoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:252: undefined reference to « aacDecoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:270: undefined reference to « aacDecoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:277: undefined reference to « aacDecoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:284: undefined reference to « aacDecoder_SetParam »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o):/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:291: encore plus de références indéfinies suivent vers « aacDecoder_SetParam »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_init »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:261: undefined reference to « aacDecoder_AncDataInit »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_flush »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:367: undefined reference to « aacDecoder_SetParam »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_close »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:97: undefined reference to « aacEncClose »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_frame »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:357: undefined reference to « aacEncEncode »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_init »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:114: undefined reference to « aacEncOpen »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:123: undefined reference to « aacEncoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:130: undefined reference to « aacEncoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:138: undefined reference to « aacEncoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:172: undefined reference to « aacEncoder_SetParam »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:179: undefined reference to « aacEncoder_SetParam »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o):/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:197: encore plus de références indéfinies suivent vers « aacEncoder_SetParam »
/root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_init »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:276: undefined reference to « aacEncEncode »
/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:282: undefined reference to « aacEncInfo »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_frame »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:260: undefined reference to « x264_picture_init »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:262: undefined reference to « x264_bit_depth »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « reconfig_encoder »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:246: undefined reference to « x264_encoder_reconfig »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_frame »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:283: undefined reference to « x264_encoder_encode »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:289: undefined reference to « x264_encoder_delayed_frames »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:283: undefined reference to « x264_encoder_encode »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « reconfig_encoder »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:173: undefined reference to « x264_encoder_reconfig »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:178: undefined reference to « x264_encoder_reconfig »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:185: undefined reference to « x264_encoder_reconfig »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:205: undefined reference to « x264_encoder_reconfig »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:211: undefined reference to « x264_encoder_reconfig »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o):/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:191: encore plus de références indéfinies suivent vers « x264_encoder_reconfig »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_init_static »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:806: undefined reference to « x264_bit_depth »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_close »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:339: undefined reference to « x264_encoder_close »
/root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_init »:
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:413: undefined reference to « x264_param_default »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:418: undefined reference to « x264_param_default_preset »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:440: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:470: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:514: undefined reference to « x264_levels »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:516: undefined reference to « x264_levels »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:540: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:541: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:542: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:543: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:601: undefined reference to « x264_param_apply_fastfirstpass »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:651: undefined reference to « x264_param_apply_profile »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:703: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:705: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:717: undefined reference to « x264_param_parse »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:735: undefined reference to « x264_encoder_open_148 »
/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:744: undefined reference to « x264_encoder_headers »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_subpacket »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:379: undefined reference to « swr_is_initialized »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_frame »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:220: undefined reference to « swr_is_initialized »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_init_resample »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:161: undefined reference to « swr_init »
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:167: undefined reference to « swr_convert »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_frame »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:234: undefined reference to « swr_convert »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_flush_resample »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:115: undefined reference to « swr_convert »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_subpacket »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:411: undefined reference to « swr_close »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_flush »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:614: undefined reference to « swr_close »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_close »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:638: undefined reference to « swr_free »
/root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_init »:
/root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:705: undefined reference to « swr_alloc »
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [shotdetect-cmd] Error 1
make[1]: *** [CMakeFiles/shotdetect-cmd.dir/all] Error 2
make: *** [all] Error 2I’ve done a lot of research about the above errors but I didn’t find any clue.
How to compile successfully Shotdetect on CentOS7 ?
Thanks to tryp here is a working CMakelist file :
# CMake integration by Christian Frisson
cmake_minimum_required(VERSION 2.8)
PROJECT(shotdetect)
SET(CMAKE_C_COMPILER "/usr/bin/clang")
SET(CMAKE_CXX_COMPILER "/usr/bin/clang++")
SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
# Get git version information for automatic embedding in version string:
include(GetGitRevisionDescription)
get_git_head_revision(GIT_REFSPEC GIT_SHA1)
# Take the first 12 characters of the SHA1 as short identifier:
STRING(SUBSTRING ${GIT_SHA1} 0 11 GIT_SHA1_SHORT)
configure_file("${CMAKE_CURRENT_SOURCE_DIR}/src/version.cc.in" "${CMAKE_CURRENT_BINARY_DIR}/version.cc" @ONLY)
list(APPEND SOURCES "${CMAKE_CURRENT_BINARY_DIR}/version.cc" src/version.h)
# Miscellaneous compilation options:
OPTION(USE_WXWIDGETS "Compile GUI app with wxWidgets, otherwise commandline app" ON)
OPTION(USE_POSTGRESQL "Compile with PostgreSQL support" OFF)
# Dependency: pkg-config (required if cross-compiling with MXE)
IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
FIND_PACKAGE (PkgConfig)
IF(NOT PKG_CONFIG_FOUND)
MESSAGE(FATAL_ERROR "pkgconfig required for cross-compiling with MXE for windows")
ENDIF()
SET(PKG_CONFIG_EXECUTABLE ${PKG_CONFIG_EXECUTABLE} CACHE STRING "pkg-config")
ENDIF()
# Dependency: FFmpeg (required)
FIND_PACKAGE( FFmpeg )
IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
PKG_CHECK_MODULES (FFMPEG_PKG REQUIRED libavcodec libavfilter libavutil libavdevice libavformat libavformat libswscale)
IF (FFMPEG_PKG_FOUND)
MESSAGE( "FFmpeg cflags found through pkg-config: ${FFMPEG_PKG_CFLAGS}" )
MESSAGE( "FFmpeg ldflags found through pkg-config: ${FFMPEG_PKG_LDFLAGS}" )
STRING(REGEX REPLACE ";" " " FFMPEG_PKG_CFLAGS "${FFMPEG_PKG_CFLAGS}")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FFMPEG_PKG_CFLAGS}")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${FFMPEG_PKG_CFLAGS}")
SET(FFMPEG_LIBRARIES ${FFMPEG_LIBRARY} ${FFMPEG_PKG_LDFLAGS})
MESSAGE("FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES}")
ELSE (FFMPEG_PKG_FOUND)
MESSAGE( FATAL_ERROR "FFmpeg cflags/ldflags not found through pkg-config." )
ENDIF (FFMPEG_PKG_FOUND)
ENDIF()
IF(FFMPEG_LIBAVFORMAT_FOUND)
MESSAGE(STATUS "avformat library found: ${FFMPEG_LIBAVFORMAT_LIBRARIES}")
ELSE()
MESSAGE(STATUS "avformat library not found.")
ENDIF()
IF(FFMPEG_LIBAVCODEC_FOUND)
MESSAGE(STATUS "avcodec library found: ${FFMPEG_LIBAVCODEC_LIBRARIES}")
ELSE()
MESSAGE(STATUS "avcodec library not found.")
ENDIF()
IF(FFMPEG_LIBAVUTIL_FOUND)
MESSAGE(STATUS "avutil library found: ${FFMPEG_LIBAVUTIL_LIBRARIES}")
ELSE()
MESSAGE(STATUS "avutil library not found.")
ENDIF()
IF(FFMPEG_LIBSWSCALE_FOUND)
MESSAGE(STATUS "swscale library found: ${FFMPEG_LIBSWSCALE_LIBRARIES}")
ELSE()
MESSAGE(STATUS "swscale library not found.")
ENDIF()
IF(FFMPEG_FOUND)
INCLUDE_DIRECTORIES(${FFMPEG_INCLUDE_DIR} ${FFMPEG_INCLUDE_DIRS})
SET(FFMPEG_LIBRARIES "${FFMPEG_LIBRARIES};/root/ffmpeg_build/lib/libswresample.a;/root/ffmpeg_build/lib/libx264.a;/lib64/libdl.so.2;/root/ffmpeg_build/lib/libfdk-aac.a;/root/ffmpeg_build/lib/libswresample.a")
MESSAGE("Found all FFmpeg libraries in ${FFMPEG_LIBRARIES}.")
ELSE()
MESSAGE(FATAL_ERROR "Some FFmpeg libraries are missing.")
ENDIF()
# Dependency: GD (required)
FIND_PACKAGE(GD REQUIRED)
IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
EXEC_PROGRAM(${CMAKE_FIND_ROOT_PATH}/bin/gdlib-config ARGS "--cflags" OUTPUT_VARIABLE GD_PKG_CFLAGS)
EXEC_PROGRAM(${CMAKE_FIND_ROOT_PATH}/bin/gdlib-config ARGS "--libs" OUTPUT_VARIABLE GD_PKG_LDFLAGS)
MESSAGE( "gd cflags found through gdlib-config: ${GD_PKG_CFLAGS}" )
MESSAGE( "gd ldflags found through gdlib-config: ${GD_PKG_LDFLAGS}" )
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GD_PKG_CFLAGS}")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GD_PKG_CFLAGS}")
SET(GD_LIBRARIES ${GD_LIBRARY} ${GD_PKG_LDFLAGS})
MESSAGE("GD_LIBRARIES ${GD_LIBRARIES}")
ENDIF()
IF(GD_FOUND)
INCLUDE_DIRECTORIES(${GD_INCLUDE_DIR})
MESSAGE("Found libgd: ${GD_LIBRARIES} in ${GD_INCLUDE_DIR}")
ELSE()
MESSAGE(FATAL_ERROR "Couldn't find libgd")
ENDIF()
# Dependency: libxml2 (required)
FIND_PACKAGE(LibXml2 2.7 REQUIRED)
IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
PKG_CHECK_MODULES (LIBXML2_PKG REQUIRED libxml-2.0)
IF (LIBXML2_PKG_FOUND)
MESSAGE( "LibXml2 cflags found through pkg-config: ${LIBXML2_PKG_CFLAGS}" )
MESSAGE( "LibXml2 ldflags found through pkg-config: ${LIBXML2_PKG_LDFLAGS}" )
STRING(REGEX REPLACE ";" " " LIBXML2_PKG_CFLAGS "${LIBXML2_PKG_CFLAGS}")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBXML2_PKG_CFLAGS}")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBXML2_PKG_CFLAGS}")
SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARY} ${LIBXML2_PKG_LDFLAGS})
MESSAGE("LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES}")
ELSE (LIBXML2_PKG_FOUND)
MESSAGE( FATAL_ERROR "LibXml2 cflags/ldflags not found through pkg-config." )
ENDIF (LIBXML2_PKG_FOUND)
ENDIF()
IF(LIBXML2_FOUND)
MESSAGE("Found libxml2: ${LIBXML2_LIBRARIES} in ${LIBXML2_INCLUDE_DIR}")
INCLUDE_DIRECTORIES(${LIBXML2_INCLUDE_DIR})
ELSE()
MESSAGE(FATAL_ERROR "Couldn't find libxml2")
ENDIF()
# Dependency: libxslt (required)
FIND_PACKAGE(LibXslt REQUIRED)
IF(LIBXSLT_FOUND)
MESSAGE("Found libxslt: ${LIBXSLT_LIBRARIES} in ${LIBXSLT_INCLUDE_DIR}")
INCLUDE_DIRECTORIES(${LIBXSLT_INCLUDE_DIR})
ELSE()
MESSAGE(FATAL_ERROR "Couldn't find libxslt")
ENDIF()
# Dependency: wxWidgets (optional)
IF(USE_WXWIDGETS)
FIND_PACKAGE(wxWidgets)# COMPONENTS core base)
IF(wxWidgets_FOUND)
MESSAGE("Found wxWidgets: ${wxWidgets_LIBRARIES} in ${wxWidgets_INCLUDE_DIRS}")
INCLUDE_DIRECTORIES(${wxWidgets_INCLUDE_DIRS})
ADD_DEFINITIONS(-DWXWIDGETS)
INCLUDE("${wxWidgets_USE_FILE}")
ELSE()
MESSAGE(FATAL_ERROR "Couldn't find wxWidgets. Set USE_WXWIDGETS to OFF or install wxWidgets.")
ENDIF()
ENDIF()
# Dependency: PostgreSQL (optional)
IF(USE_POSTGRESQL)
FIND_PACKAGE(PostgreSQL)
IF(PostgreSQL_FOUND)
MESSAGE("Found PostgreSQL: ${PostgreSQL_LIBRARIES} in ${PostgreSQL_INCLUDE_DIR}")
INCLUDE_DIRECTORIES(${PostgreSQL_INCLUDE_DIR})
ELSE()
MESSAGE(FATAL_ERROR "Couldn't find PostgreSQL. Set USE_POSTGRESQL to OFF or install PostgreSQL.")
ENDIF()
ENDIF()
# shotdetect
SET(TARGET_NAME "shotdetect")
INCLUDE_DIRECTORIES(.)
# shotdetect library
SET(${TARGET_NAME}_LIBRARY_SRCS src/film.cc src/graph.cc src/image.cc src/shot.cc src/xml.cc)
SET(${TARGET_NAME}_LIBRARY_HDRS src/film.h src/graph.h src/image.h src/shot.h src/xml.h)
IF(USE_POSTGRESQL)
SET(${TARGET_NAME}_LIBRARY_SRCS ${${TARGET_NAME}_LIBRARY_SRCS} src/bdd.cc)
SET(${TARGET_NAME}_LIBRARY_HDRS ${${TARGET_NAME}_LIBRARY_HDRS} src/bdd.h)
ENDIF()
ADD_LIBRARY(${TARGET_NAME} ${${TARGET_NAME}_LIBRARY_SRCS} ${${TARGET_NAME}_LIBRARY_HDRS})
TARGET_LINK_LIBRARIES(${TARGET_NAME} ${FFMPEG_LIBRARIES} ${LIBXML2_LIBRARIES} ${LIBXSLT_LIBRARIES} ${GD_LIBRARIES} "pthread" "m" "z")
IF(USE_WXWIDGETS AND wxWidgets_FOUND)
TARGET_LINK_LIBRARIES(${TARGET_NAME} ${wxWidgets_LIBRARIES})
ENDIF()
IF(USE_POSTGRESQL AND PostgreSQL_FOUND)
TARGET_LINK_LIBRARIES(${TARGET_NAME} ${PostgreSQL_LIBRARY})
ENDIF()
# shotdetect application: gui or commandline
IF(APPLE)
SET(APP_TYPE "MACOSX_BUNDLE")
ELSEIF(WIN32)
SET(APP_TYPE "WIN32")
ENDIF()
IF(USE_WXWIDGETS AND wxWidgets_FOUND)
LIST(APPEND ${TARGET_NAME}_GUI_SRCS src/main.cc src/ui/dialog_help.cc src/ui/dialog_shotdetect.cc src/ui/process_video_thread.cc)
LIST(APPEND ${TARGET_NAME}_GUI_HDRS src/ui/dialog_help.h src/ui/dialog_shotdetect.h src/ui/process_video_thread.h)
ADD_EXECUTABLE(${TARGET_NAME}-gui ${APP_TYPE} ${SOURCES} ${${TARGET_NAME}_GUI_SRCS} ${${TARGET_NAME}_GUI_HDRS})
TARGET_LINK_LIBRARIES(${TARGET_NAME}-gui ${TARGET_NAME})
# Make this target optional to install:
SET(TARGETS_TO_INSTALL ${TARGET_NAME}-gui)
ELSE()
LIST(APPEND ${TARGET_NAME}_COMMANDLINE_SRCS src/commandline.cc)
ADD_EXECUTABLE(${TARGET_NAME}-cmd ${SOURCES} ${${TARGET_NAME}_COMMANDLINE_SRCS})
TARGET_LINK_LIBRARIES(${TARGET_NAME}-cmd ${TARGET_NAME})
# Make this target optional to install:
SET(TARGETS_TO_INSTALL ${TARGET_NAME}-cmd)
ENDIF()
# Routines for installing shotdetect.
# Taken from official documentation (http://www.cmake.org/cmake/help/cmake2.6docs.html#command:install)
install(
TARGETS ${TARGETS_TO_INSTALL}
RUNTIME DESTINATION bin
LIBRARY DESTINATION lib
ARCHIVE DESTINATION lib/static
)the built binary will be in the built directory, you can move there and execute
make installto make the binary system wide.
-
-
Android ffmpeg. Linker command failed with exit code 1
8 juin 2017, par Wilsom SandersI’m trying to build ffmpeg static libraries and link them to an android project in order to implement a video player. Goal is to make a player capable of receiving video file from various sources similar to p2p file sharing networks. (target api is 21 level which is 1 level short from supposed official solution with MediaSource)
I managed to compile ffmpeg from this repo (all the code used as-is) but later i got stuck on a linking problem. Whenever I try to compile I get list of ffmpeg methods called in my code and a short eloquent message :
Linker command failed with exit code 1
I have no clue how to pass -v flag to the linker in android studio. Would be great if somebody hinted me that.
I use android studio, build with gradle and cmake.
There’s my files :
build.gradle (Project)// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.3.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}build.gradle (Module)
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
productFlavors {
x86 {
ndk {
abiFilter "x86"
}
}
arm {
ndk {
abiFilters "armeabi-v7a"
}
}
armv7 {
ndk {
abiFilters "armeabi-v7a"
}
}
}
defaultConfig {
applicationId "com.example.ledo.ndkapplication"
minSdkVersion 22
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags "-std=c++11 -frtti -fexceptions"
arguments '-DANDROID_PLATFORM=android-16'
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
splits {
abi {
enable true
reset()
include 'x86', 'armeabi-v7a'
universalApk true
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.android.support:design:25.3.1'
compile 'com.writingminds:FFmpegAndroid:0.3.2'
testCompile 'junit:junit:4.12'
}CMakeLists.txt
# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html
# Sets the minimum version of CMake required to build the native library.
cmake_minimum_required(VERSION 2.8)
# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.
add_library( # Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
src/main/cpp/native-lib.cpp
src/main/cpp/NativePlayer.h
src/main/cpp/NativePlayer.cpp)
# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.
find_library( # Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log )
find_library(png-lib png)
# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.
#avcodec
#avfilter
#avformat
#avutil
#swresample
#swscale
#${ANDROID_ABI}
message(${ANDROID_ABI})
set(FFMPEG_ROOT_DIR src/main/libs/ffmpeg/${ANDROID_ABI})
add_library(avcodec STATIC IMPORTED)
add_library(avformat STATIC IMPORTED)
add_library(avfilter STATIC IMPORTED)
add_library(avutil STATIC IMPORTED)
add_library(swresample STATIC IMPORTED)
add_library(swscale STATIC IMPORTED)
#SET_TARGET_PROPERTIES(avcodec PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavcodec.a)
#SET_TARGET_PROPERTIES(avfilter PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavfilter.a)
#SET_TARGET_PROPERTIES(avformat PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavformat.a)
#SET_TARGET_PROPERTIES(avutil PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavutil.a)
#SET_TARGET_PROPERTIES(swresample PROPERTIES LINKER_LANGUAGE C)
set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswresample.a)
#SET_TARGET_PROPERTIES(swscale PROPERTIES LINKER_LANGUAGE C)
set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswscale.a)
include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/include )
include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib )
target_link_libraries( # Specifies the target library.
native-lib
# Links the target library to the log library
# included in the NDK.
${log-lib}
avcodec
avformat
#avfilter
#swresample
#swscale
#avutil
GLESv2)I have .a files in following locations :
%PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a
%PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a-neon
%PROJECT_DIR%/app/src/libs/ffmpeg/x86It doesn’t look to me that linker misses files themselves. (I get different out put if I misplace them.)
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