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Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
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Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...)
Sur d’autres sites (8901)
-
OpenCV VideoWriter using ffmpeg with "Could not open codec 'libx264'" Error
28 septembre 2016, par user2262504I am new to OpenCV, and I want write Mat images into video using VideoWriter on Ubuntu 12.04. But when constructing VideoWriter, errors came out.
It seems that OpenCV invoke ffmpeg API using default parameters and ffmpeg invoke x264 using its default parameters. Then these setting is broken for libx264. Thus the "Could not open codec ’libx264’" error.
Anyone has ideas to solve this problem ?
More specifically :
- anyone knows where and how OpenCV invoke ffmpeg API ?
- how to change ffmpeg default settings using code, hopefull, can be easily embeded into OpenCV ?
- will changes of default in ffmpeg be carried to libx264 ?
Errors :
1. Uising CV_FOURCC('H', '2', '6', '4')
[libx264 @ 0x255de40] broken ffmpeg default settings detected
[libx264 @ 0x255de40] use an encoding preset (e.g. -vpre medium)
[libx264 @ 0x255de40] preset usage: -vpre <speed> -vpre <profile>
[libx264 @ 0x255de40] speed presets are listed in x264 --help
[libx264 @ 0x255de40] profile is optional; x264 defaults to high
Could not open codec 'libx264': Unspecified error
2. Using FOURCC = -1 to invoke user customized codec
OpenCV Error: Unsupported format or combination of formats (Gstreamer Opencv
backend doesn't support this codec acutally.) in CvVideoWriter_GStreamer::open,
file /home/XXX/Downloads/opencv-2.4.8/modules/highgui/src/cap_gstreamer.cpp,
line 505 terminate called after throwing an instance of 'cv::Exception'
what(): /home/XXX/Downloads/opencv-2.4.8/modules/highgui/src/cap_gstreamer.cpp:
505: error: (-210) Gstreamer Opencv backend doesn't support this codec acutally.
in function CvVideoWriter_GStreamer::open
</profile></speed>Codes :
int main(int argc, char *argv[])
{
VideoWriter outputVideo;
bool fourcc_on = true; //switch on / off different error
if (fourcc_on)
outputVideo.open("outVideo.avi", CV_FOURCC('H', '2', '6', '4'), 25, Size(100, 100), true);
else
outputVideo.open("outVideo.avi", -1, 25, Size(100, 100), true);
if (!outputVideo.isOpened())
{
cout << "Could not open the output video for write" << endl;
return -1;
}
return 0;
}OpenCV Configuration :
-- Detected version of GNU GCC: 46 (406)
-- Found OpenEXR: /usr/lib/libIlmImf.so
-- Looking for linux/videodev.h
-- Looking for linux/videodev.h - not found
-- Looking for linux/videodev2.h
-- Looking for linux/videodev2.h - found
-- Looking for sys/videoio.h
-- Looking for sys/videoio.h - not found
-- Looking for libavformat/avformat.h
-- Looking for libavformat/avformat.h - found
-- Looking for ffmpeg/avformat.h
-- Looking for ffmpeg/avformat.h - not found
-- Could NOT find JNI (missing: JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)
--
-- General configuration for OpenCV 2.4.8 =====================================
-- Version control: unknown
--
-- Platform:
-- Host: Linux 3.8.0-38-generic x86_64
-- CMake: 2.8.7
-- CMake generator: Unix Makefiles
-- CMake build tool: /usr/bin/make
-- Configuration: RELEASE
--
-- C/C++:
-- Built as dynamic libs?: YES
-- C++ Compiler: /usr/bin/c++ (ver 4.6)
-- C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
-- C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
-- C Compiler: /usr/bin/gcc
-- C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
-- C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
-- Linker flags (Release):
-- Linker flags (Debug):
-- Precompiled headers: YES
--
-- OpenCV modules:
-- To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib python stitching superres ts videostab
-- Disabled: world
-- Disabled by dependency: -
-- Unavailable: androidcamera dynamicuda java
--
-- GUI:
-- QT: NO
-- GTK+ 2.x: YES (ver 2.24.10)
-- GThread : YES (ver 2.32.4)
-- GtkGlExt: NO
-- OpenGL support: NO
--
-- Media I/O:
-- ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.3.4)
-- JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
-- PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.46)
-- TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 3.9.5)
-- JPEG 2000: /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
-- OpenEXR: /usr/lib/libImath.so /usr/lib/libIlmImf.so /usr/lib/libIex.so /usr/lib/libHalf.so /usr/lib/libIlmThread.so (ver 1.6.1)
--
-- Video I/O:
-- DC1394 1.x: NO
-- DC1394 2.x: YES (ver 2.2.0)
-- FFMPEG: YES
-- codec: YES (ver 55.58.105)
-- format: YES (ver 55.37.101)
-- util: YES (ver 52.78.100)
-- swscale: YES (ver 2.6.100)
-- gentoo-style: YES
-- GStreamer:
-- base: YES (ver 0.10.36)
-- app: YES (ver 0.10.36)
-- video: YES (ver 0.10.36)
-- OpenNI: NO
-- OpenNI PrimeSensor Modules: NO
-- PvAPI: NO
-- GigEVisionSDK: NO
-- UniCap: NO
-- UniCap ucil: NO
-- V4L/V4L2: Using libv4l (ver 1.0.1)
-- XIMEA: NO
-- Xine: NO
--
-- Other third-party libraries:
-- Use IPP: NO
-- Use Eigen: NO
-- Use TBB: NO
-- Use OpenMP: NO
-- Use GCD NO
-- Use Concurrency NO
-- Use C=: NO
-- Use Cuda: NO
-- Use OpenCL: YES
--
-- OpenCL:
-- Version: dynamic
-- Include path: /home/shixudongleo/Downloads/opencv-2.4.8/3rdparty/include/opencl/1.2
-- Use AMD FFT: NO
-- Use AMD BLAS: NO
--
-- Python:
-- Interpreter: /usr/bin/python (ver 2.7.3)
-- Libraries: /usr/lib/libpython2.7.so
-- numpy: /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.6.1)
-- packages path: lib/python2.7/dist-packages
--
-- Java:
-- ant: NO
-- JNI: NO
-- Java tests: NO
--
-- Documentation:
-- Build Documentation: NO
-- Sphinx: NO
-- PdfLaTeX compiler: /usr/bin/pdflatex
--
-- Tests and samples:
-- Tests: YES
-- Performance tests: YES
-- C/C++ Examples: NO
--
-- Install path: /usr/local
--
-- cvconfig.h is in: /home/shixudongleo/Downloads/opencv-2.4.8/build
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done
-- Build files have been written to: /home/XXX/Downloads/opencv-2.4.8/buildFFMPEG
ffmpeg is enable to support OpenCV and libx264 is enabled when compiling ffmpeg.
By using ffmpeg command line, libx264 is running normally.$ ffmpeg -i test.avi -vcodec libx264 test.mp4
ffmpeg -i test.avi -vcodec libx264 test.mp4 > ~/Downloads/ffmpeg_log.txt
ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 24 2014 16:39:51 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-shared --enable-pic
libavutil 52. 78.100 / 52. 78.100
libavcodec 55. 58.105 / 55. 58.105
libavformat 55. 37.101 / 55. 37.101
libavdevice 55. 13.100 / 55. 13.100
libavfilter 4. 4.100 / 4. 4.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, avi, from 'test.avi':
Duration: 00:00:03.73, start: 0.000000, bitrate: 1757 kb/s
Stream #0:0: Video: msvideo1 (CRAM / 0x4D415243), rgb555le, 320x240, 1781 kb/s, 15 tbr, 15 tbn, 15 tbc
Metadata:
title : julius.avi Video #1
File 'test.mp4' already exists. Overwrite ? [y/N] y
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x25d08e0] using cpu capabilities: none!
[libx264 @ 0x25d08e0] profile High 4:4:4 Predictive, level 1.2, 4:4:4 8-bit
[libx264 @ 0x25d08e0] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=12 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'test.mp4':
Metadata:
encoder : Lavf55.37.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 320x240, q=-1--1, 15360 tbn, 15 tbc
Metadata:
title : julius.avi Video #1
Stream mapping:
Stream #0:0 -> #0:0 (msvideo1 -> libx264)
Press [q] to stop, [?] for help
frame= 56 fps=0.0 q=-1.0 Lsize= 321kB time=00:00:03.60 bitrate= 731.0kbits/s
video:320kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.409949%
[libx264 @ 0x25d08e0] frame I:3 Avg QP:15.36 size: 7975
[libx264 @ 0x25d08e0] frame P:38 Avg QP:26.05 size: 6230
[libx264 @ 0x25d08e0] frame B:15 Avg QP:28.25 size: 4418
[libx264 @ 0x25d08e0] consecutive B-frames: 46.4% 53.6% 0.0% 0.0%
[libx264 @ 0x25d08e0] mb I I16..4: 1.4% 72.8% 25.8%
[libx264 @ 0x25d08e0] mb P I16..4: 1.6% 5.7% 15.1% P16..4: 7.6% 6.3% 7.4% 0.0% 0.0% skip:56.3%
[libx264 @ 0x25d08e0] mb B I16..4: 0.2% 1.0% 2.0% B16..8: 13.3% 7.8% 8.7% direct: 8.3% skip:58.8% L0:34.9% L1:36.6% BI:28.5%
[libx264 @ 0x25d08e0] 8x8 transform intra:37.7% inter:2.3%
[libx264 @ 0x25d08e0] coded y,u,v intra: 52.1% 42.1% 30.1% inter: 19.6% 9.2% 5.2%
[libx264 @ 0x25d08e0] i16 v,h,dc,p: 56% 17% 24% 2%
[libx264 @ 0x25d08e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 16% 68% 1% 1% 1% 1% 1% 1%
[libx264 @ 0x25d08e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 18% 28% 5% 6% 5% 7% 5% 6%
[libx264 @ 0x25d08e0] Weighted P-Frames: Y:31.6% UV:21.1%
[libx264 @ 0x25d08e0] ref P L0: 70.5% 9.0% 12.1% 6.5% 2.0%
[libx264 @ 0x25d08e0] ref B L0: 91.3% 8.7%
[libx264 @ 0x25d08e0] kb/s:700.56 -
OpenCV VideoWriter using ffmpeg with "Could not open codec 'libx264'" Error
28 septembre 2016, par user2262504I am new to OpenCV, and I want write Mat images into video using VideoWriter on Ubuntu 12.04. But when constructing VideoWriter, errors came out.
It seems that OpenCV invoke ffmpeg API using default parameters and ffmpeg invoke x264 using its default parameters. Then these setting is broken for libx264. Thus the "Could not open codec ’libx264’" error.
Anyone has ideas to solve this problem ?
More specifically :
- anyone knows where and how OpenCV invoke ffmpeg API ?
- how to change ffmpeg default settings using code, hopefull, can be easily embeded into OpenCV ?
- will changes of default in ffmpeg be carried to libx264 ?
Errors :
1. Uising CV_FOURCC('H', '2', '6', '4')
[libx264 @ 0x255de40] broken ffmpeg default settings detected
[libx264 @ 0x255de40] use an encoding preset (e.g. -vpre medium)
[libx264 @ 0x255de40] preset usage: -vpre <speed> -vpre <profile>
[libx264 @ 0x255de40] speed presets are listed in x264 --help
[libx264 @ 0x255de40] profile is optional; x264 defaults to high
Could not open codec 'libx264': Unspecified error
2. Using FOURCC = -1 to invoke user customized codec
OpenCV Error: Unsupported format or combination of formats (Gstreamer Opencv
backend doesn't support this codec acutally.) in CvVideoWriter_GStreamer::open,
file /home/XXX/Downloads/opencv-2.4.8/modules/highgui/src/cap_gstreamer.cpp,
line 505 terminate called after throwing an instance of 'cv::Exception'
what(): /home/XXX/Downloads/opencv-2.4.8/modules/highgui/src/cap_gstreamer.cpp:
505: error: (-210) Gstreamer Opencv backend doesn't support this codec acutally.
in function CvVideoWriter_GStreamer::open
</profile></speed>Codes :
int main(int argc, char *argv[])
{
VideoWriter outputVideo;
bool fourcc_on = true; //switch on / off different error
if (fourcc_on)
outputVideo.open("outVideo.avi", CV_FOURCC('H', '2', '6', '4'), 25, Size(100, 100), true);
else
outputVideo.open("outVideo.avi", -1, 25, Size(100, 100), true);
if (!outputVideo.isOpened())
{
cout << "Could not open the output video for write" << endl;
return -1;
}
return 0;
}OpenCV Configuration :
-- Detected version of GNU GCC: 46 (406)
-- Found OpenEXR: /usr/lib/libIlmImf.so
-- Looking for linux/videodev.h
-- Looking for linux/videodev.h - not found
-- Looking for linux/videodev2.h
-- Looking for linux/videodev2.h - found
-- Looking for sys/videoio.h
-- Looking for sys/videoio.h - not found
-- Looking for libavformat/avformat.h
-- Looking for libavformat/avformat.h - found
-- Looking for ffmpeg/avformat.h
-- Looking for ffmpeg/avformat.h - not found
-- Could NOT find JNI (missing: JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)
--
-- General configuration for OpenCV 2.4.8 =====================================
-- Version control: unknown
--
-- Platform:
-- Host: Linux 3.8.0-38-generic x86_64
-- CMake: 2.8.7
-- CMake generator: Unix Makefiles
-- CMake build tool: /usr/bin/make
-- Configuration: RELEASE
--
-- C/C++:
-- Built as dynamic libs?: YES
-- C++ Compiler: /usr/bin/c++ (ver 4.6)
-- C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
-- C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
-- C Compiler: /usr/bin/gcc
-- C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
-- C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
-- Linker flags (Release):
-- Linker flags (Debug):
-- Precompiled headers: YES
--
-- OpenCV modules:
-- To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib python stitching superres ts videostab
-- Disabled: world
-- Disabled by dependency: -
-- Unavailable: androidcamera dynamicuda java
--
-- GUI:
-- QT: NO
-- GTK+ 2.x: YES (ver 2.24.10)
-- GThread : YES (ver 2.32.4)
-- GtkGlExt: NO
-- OpenGL support: NO
--
-- Media I/O:
-- ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.3.4)
-- JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
-- PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.46)
-- TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 3.9.5)
-- JPEG 2000: /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
-- OpenEXR: /usr/lib/libImath.so /usr/lib/libIlmImf.so /usr/lib/libIex.so /usr/lib/libHalf.so /usr/lib/libIlmThread.so (ver 1.6.1)
--
-- Video I/O:
-- DC1394 1.x: NO
-- DC1394 2.x: YES (ver 2.2.0)
-- FFMPEG: YES
-- codec: YES (ver 55.58.105)
-- format: YES (ver 55.37.101)
-- util: YES (ver 52.78.100)
-- swscale: YES (ver 2.6.100)
-- gentoo-style: YES
-- GStreamer:
-- base: YES (ver 0.10.36)
-- app: YES (ver 0.10.36)
-- video: YES (ver 0.10.36)
-- OpenNI: NO
-- OpenNI PrimeSensor Modules: NO
-- PvAPI: NO
-- GigEVisionSDK: NO
-- UniCap: NO
-- UniCap ucil: NO
-- V4L/V4L2: Using libv4l (ver 1.0.1)
-- XIMEA: NO
-- Xine: NO
--
-- Other third-party libraries:
-- Use IPP: NO
-- Use Eigen: NO
-- Use TBB: NO
-- Use OpenMP: NO
-- Use GCD NO
-- Use Concurrency NO
-- Use C=: NO
-- Use Cuda: NO
-- Use OpenCL: YES
--
-- OpenCL:
-- Version: dynamic
-- Include path: /home/shixudongleo/Downloads/opencv-2.4.8/3rdparty/include/opencl/1.2
-- Use AMD FFT: NO
-- Use AMD BLAS: NO
--
-- Python:
-- Interpreter: /usr/bin/python (ver 2.7.3)
-- Libraries: /usr/lib/libpython2.7.so
-- numpy: /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.6.1)
-- packages path: lib/python2.7/dist-packages
--
-- Java:
-- ant: NO
-- JNI: NO
-- Java tests: NO
--
-- Documentation:
-- Build Documentation: NO
-- Sphinx: NO
-- PdfLaTeX compiler: /usr/bin/pdflatex
--
-- Tests and samples:
-- Tests: YES
-- Performance tests: YES
-- C/C++ Examples: NO
--
-- Install path: /usr/local
--
-- cvconfig.h is in: /home/shixudongleo/Downloads/opencv-2.4.8/build
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done
-- Build files have been written to: /home/XXX/Downloads/opencv-2.4.8/buildFFMPEG
ffmpeg is enable to support OpenCV and libx264 is enabled when compiling ffmpeg.
By using ffmpeg command line, libx264 is running normally.$ ffmpeg -i test.avi -vcodec libx264 test.mp4
ffmpeg -i test.avi -vcodec libx264 test.mp4 > ~/Downloads/ffmpeg_log.txt
ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 24 2014 16:39:51 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-shared --enable-pic
libavutil 52. 78.100 / 52. 78.100
libavcodec 55. 58.105 / 55. 58.105
libavformat 55. 37.101 / 55. 37.101
libavdevice 55. 13.100 / 55. 13.100
libavfilter 4. 4.100 / 4. 4.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, avi, from 'test.avi':
Duration: 00:00:03.73, start: 0.000000, bitrate: 1757 kb/s
Stream #0:0: Video: msvideo1 (CRAM / 0x4D415243), rgb555le, 320x240, 1781 kb/s, 15 tbr, 15 tbn, 15 tbc
Metadata:
title : julius.avi Video #1
File 'test.mp4' already exists. Overwrite ? [y/N] y
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x25d08e0] using cpu capabilities: none!
[libx264 @ 0x25d08e0] profile High 4:4:4 Predictive, level 1.2, 4:4:4 8-bit
[libx264 @ 0x25d08e0] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=12 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'test.mp4':
Metadata:
encoder : Lavf55.37.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 320x240, q=-1--1, 15360 tbn, 15 tbc
Metadata:
title : julius.avi Video #1
Stream mapping:
Stream #0:0 -> #0:0 (msvideo1 -> libx264)
Press [q] to stop, [?] for help
frame= 56 fps=0.0 q=-1.0 Lsize= 321kB time=00:00:03.60 bitrate= 731.0kbits/s
video:320kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.409949%
[libx264 @ 0x25d08e0] frame I:3 Avg QP:15.36 size: 7975
[libx264 @ 0x25d08e0] frame P:38 Avg QP:26.05 size: 6230
[libx264 @ 0x25d08e0] frame B:15 Avg QP:28.25 size: 4418
[libx264 @ 0x25d08e0] consecutive B-frames: 46.4% 53.6% 0.0% 0.0%
[libx264 @ 0x25d08e0] mb I I16..4: 1.4% 72.8% 25.8%
[libx264 @ 0x25d08e0] mb P I16..4: 1.6% 5.7% 15.1% P16..4: 7.6% 6.3% 7.4% 0.0% 0.0% skip:56.3%
[libx264 @ 0x25d08e0] mb B I16..4: 0.2% 1.0% 2.0% B16..8: 13.3% 7.8% 8.7% direct: 8.3% skip:58.8% L0:34.9% L1:36.6% BI:28.5%
[libx264 @ 0x25d08e0] 8x8 transform intra:37.7% inter:2.3%
[libx264 @ 0x25d08e0] coded y,u,v intra: 52.1% 42.1% 30.1% inter: 19.6% 9.2% 5.2%
[libx264 @ 0x25d08e0] i16 v,h,dc,p: 56% 17% 24% 2%
[libx264 @ 0x25d08e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 16% 68% 1% 1% 1% 1% 1% 1%
[libx264 @ 0x25d08e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 18% 28% 5% 6% 5% 7% 5% 6%
[libx264 @ 0x25d08e0] Weighted P-Frames: Y:31.6% UV:21.1%
[libx264 @ 0x25d08e0] ref P L0: 70.5% 9.0% 12.1% 6.5% 2.0%
[libx264 @ 0x25d08e0] ref B L0: 91.3% 8.7%
[libx264 @ 0x25d08e0] kb/s:700.56 -
FFMPEG - 2-pass video conversion final file size is larger than expected
14 juin 2022, par Kevin KorbWe are converting files and the target filesize is important. For one version of the video it can not be above 750KB.


We are using the 2-pass encoding and specifying the target audio bitrate and target video bitrate, however the longer the duration of the video, the larger the file becomes and exceeds our 750KB target.




For example, our file is 53.3 seconds, we know our final target of
750KB. We like our audio at 48kbps (mono).


So we calculate our target (total) bitrate at : 750*8/53.3 = 112.57
total kbps Audio bitrate = 48kbps Video bitrate = 112-48 = 64kbps
video


We would expect the file produced to be 746.2KB. (112*53.3 / 8)


The file produced is 850k(ish).




Is there something that takes up space in the file that isn't video or audio that we need to take into consideration ?


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