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Autres articles (57)
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Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...) -
L’espace de configuration de MediaSPIP
29 novembre 2010, parL’espace de configuration de MediaSPIP est réservé aux administrateurs. Un lien de menu "administrer" est généralement affiché en haut de la page [1].
Il permet de configurer finement votre site.
La navigation de cet espace de configuration est divisé en trois parties : la configuration générale du site qui permet notamment de modifier : les informations principales concernant le site (...) -
Ajouter notes et légendes aux images
7 février 2011, parPour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
Modification lors de l’ajout d’un média
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Sur d’autres sites (11302)
-
libFLAC : Put upper bound on number of seek points.
18 février 2015, par Erik de Castro LopolibFLAC : Put upper bound on number of seek points.
Restrict number of seek points to 32768 total and a maximum of two per
second.Ten hours of content is 36000 seconds which gives about one seek point
for every second for those ten hours. Also, having more than two seek
point per second makes little sense regardless of content length.Without these restrictions flac-to-flac encoding of a malformed input
file (eg something generated with http://lcamtuf.coredump.cx/afl/)
can result in an attempt to generate a stupidly large number of seek
points and cause an allocation failure. -
avcodec/hevc_ps : add proper bound checks around cm_ref_layer_id in colour_mapping_table.
17 mai 2023, par Clement Lecigne -
using ffmpeg for development, libavutil/error environment not OK
26 février 2018, par luoyangheroI want to build a latest ffmpeg development library. I refered the docker script
’https://github.com/jrottenberg/ffmpeg/blob/master/docker-images/3.4/Dockerfile’,
and I changed the docker file to a shell file. Download all source files,
compile all dependency source and ffmpeg 3.4.1 source.
The following is my changed shell script.#!/bin/sh
export PKG_CONFIG_PATH=/opt/ffmpeg/lib/pkgconfig
LD_LIBRARY_PATH=/opt/ffmpeg/lib
PREFIX=/opt/ffmpeg
MAKEFLAGS="-j4"
export FFMPEG_VERSION=3.4.1
export FDKAAC_VERSION=0.1.5
export LAME_VERSION=3.99.5
export LIBASS_VERSION=0.13.7
export OGG_VERSION=1.3.2
export OPENCOREAMR_VERSION=0.1.4
export OPUS_VERSION=1.2
export OPENJPEG_VERSION=2.1.2
export THEORA_VERSION=1.1.1
export VORBIS_VERSION=1.3.5
export VPX_VERSION=1.6.1
export X264_VERSION=20170226-2245-stable
export X265_VERSION=2.3
export XVID_VERSION=1.3.4
export FREETYPE_VERSION=2.5.5
export FRIBIDI_VERSION=0.19.7
export FONTCONFIG_VERSION=2.12.4
export LIBVIDSTAB_VERSION=1.1.0
SRC=/usr/local
OGG_SHA256SUM="e19ee34711d7af328cb26287f4137e70630e7261b17cbe3cd41011d73a654692 libogg-1.3.2.tar.gz"
OPUS_SHA256SUM="77db45a87b51578fbc49555ef1b10926179861d854eb2613207dc79d9ec0a9a9 opus-1.2.tar.gz"
VORBIS_SHA256SUM="6efbcecdd3e5dfbf090341b485da9d176eb250d893e3eb378c428a2db38301ce libvorbis-1.3.5.tar.gz"
THEORA_SHA256SUM="40952956c47811928d1e7922cda3bc1f427eb75680c3c37249c91e949054916b libtheora-1.1.1.tar.gz"
XVID_SHA256SUM="4e9fd62728885855bc5007fe1be58df42e5e274497591fec37249e1052ae316f xvidcore-1.3.4.tar.gz"
FREETYPE_SHA256SUM="5d03dd76c2171a7601e9ce10551d52d4471cf92cd205948e60289251daddffa8 freetype-2.5.5.tar.gz"
LIBVIDSTAB_SHA256SUM="14d2a053e56edad4f397be0cb3ef8eb1ec3150404ce99a426c4eb641861dc0bb v1.1.0.tar.gz"
LIBASS_SHA256SUM="8fadf294bf701300d4605e6f1d92929304187fca4b8d8a47889315526adbafd7 0.13.7.tar.gz"
FRIBIDI_SHA256SUM="3fc96fa9473bd31dcb5500bdf1aa78b337ba13eb8c301e7c28923fea982453a8 0.19.7.tar.gz"
apt-get -y update
apt-get install -y --no-install-recommends ca-certificates expat libgomp1
apt-get autoremove -y
apt-get clean -y
apt-get install -y --no-install-recommends autoconf
apt-get install -y --no-install-recommends automake
apt-get install -y --no-install-recommends cmake
apt-get install -y --no-install-recommends curl
apt-get install -y --no-install-recommends bzip2
apt-get install -y --no-install-recommends libexpat1-dev
apt-get install -y --no-install-recommends g++
apt-get install -y --no-install-recommends gcc
apt-get install -y --no-install-recommends git
apt-get install -y --no-install-recommends gperf
apt-get install -y --no-install-recommends libtool
apt-get install -y --no-install-recommends make
apt-get install -y --no-install-recommends nasm
apt-get install -y --no-install-recommends perl
apt-get install -y --no-install-recommends pkg-config
apt-get install -y --no-install-recommends python
apt-get install -y --no-install-recommends libssl-dev
apt-get install -y --no-install-recommends yasm
apt-get install -y --no-install-recommends zlib1g-dev
############LIB env
## opencore-amr https://sourceforge.net/projects/opencore-amr/
####OnLine
# DIR=/tmp/opencore-amr && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sL https://downloads.sf.net/project/opencore-amr/opencore-amr/opencore-amr-${OPENCOREAMR_VERSION}.tar.gz | \
# tar -zx --strip-components=1 && \
# ./configure --prefix="${PREFIX}" --enable-shared && \
# make && \
# make install && \
# rm -rf ${DIR}
##curl -sL https://downloads.sf.net/project/opencore-amr/opencore-amr/opencore-amr-0.1.4.tar.gz | tar -zx --strip-components=1
####OffLine
DIR=opencore-amr-${OPENCOREAMR_VERSION} && \
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --enable-shared && \
make && \
make install && \
cd ..
### x264 http://www.videolan.org/developers/x264.html
#
# DIR=/tmp/x264 && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sL https://download.videolan.org/pub/videolan/x264/snapshots/x264-snapshot-${X264_VERSION}.tar.bz2 | \
# tar -jx --strip-components=1 && \
# ./configure --prefix="${PREFIX}" --enable-shared --enable-pic --disable-cli && \
# make && \
# make install && \
# rm -rf ${DIR}
####OffLine
DIR=x264-snapshot-${X264_VERSION}
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.bz2 && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --enable-shared --enable-pic --disable-cli && \
make && \
make install && \
cd ..
#### x265 http://x265.org/
#
# DIR=/tmp/x265 && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sL https://download.videolan.org/pub/videolan/x265/x265_${X265_VERSION}.tar.gz | \
# tar -zx && \
# cd x265_${X265_VERSION}/build/linux && \
# sed -i "/-DEXTRA_LIB/ s/$/ -DCMAKE_INSTALL_PREFIX=\/opt\/ffmpeg/" multilib.sh && \
# sed -i "/^cmake/ s/$/ -DENABLE_CLI=OFF/" multilib.sh && \
# ./multilib.sh && \
# make -C 8bit install
### rm -rf ${DIR}
####OffLine
DIR=x265_${X265_VERSION}
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR}/build/linux && \
sed -i "/-DEXTRA_LIB/ s/$/ -DCMAKE_INSTALL_PREFIX=\/opt\/ffmpeg/" multilib.sh && \
sed -i "/^cmake/ s/$/ -DENABLE_CLI=OFF/" multilib.sh && \
./multilib.sh && \
make -C 8bit install
cd ../../../
#### libogg https://www.xiph.org/ogg/
#
# DIR=/tmp/ogg && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO http://downloads.xiph.org/releases/ogg/libogg-${OGG_VERSION}.tar.gz && \
# echo ${OGG_SHA256SUM} | sha256sum --check && \
# tar -zx --strip-components=1 -f libogg-${OGG_VERSION}.tar.gz && \
# ./configure --prefix="${PREFIX}" --enable-shared && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=libogg-${OGG_VERSION}
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --enable-shared && \
make && \
make install && \
cd ..
#### libopus https://www.opus-codec.org/
#
# DIR=/tmp/opus && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO https://archive.mozilla.org/pub/opus/opus-${OPUS_VERSION}.tar.gz && \
# echo ${OPUS_SHA256SUM} | sha256sum --check && \
# tar -zx --strip-components=1 -f opus-${OPUS_VERSION}.tar.gz && \
# autoreconf -fiv && \
# ./configure --prefix="${PREFIX}" --enable-shared && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=opus-${OPUS_VERSION}
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
autoreconf -fiv && \
./configure --prefix="${PREFIX}" --enable-shared && \
make && \
make install && \
cd ..
#### libvorbis https://xiph.org/vorbis/
#
# DIR=/tmp/vorbis && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO http://downloads.xiph.org/releases/vorbis/libvorbis-${VORBIS_VERSION}.tar.gz && \
# echo ${VORBIS_SHA256SUM} | sha256sum --check && \
# tar -zx --strip-components=1 -f libvorbis-${VORBIS_VERSION}.tar.gz && \
# ./configure --prefix="${PREFIX}" --with-ogg="${PREFIX}" --enable-shared && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=libvorbis-${VORBIS_VERSION}
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --with-ogg="${PREFIX}" --enable-shared && \
make && \
make install && \
cd ..
#### libtheora http://www.theora.org/
#
# DIR=/tmp/theora && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO http://downloads.xiph.org/releases/theora/libtheora-${THEORA_VERSION}.tar.gz && \
# echo ${THEORA_SHA256SUM} | sha256sum --check && \
# tar -zx --strip-components=1 -f libtheora-${THEORA_VERSION}.tar.gz && \
# ./configure --prefix="${PREFIX}" --with-ogg="${PREFIX}" --enable-shared && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=libtheora-${THEORA_VERSION}
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --with-ogg="${PREFIX}" --enable-shared && \
make && \
make install && \
cd ..
#### libvpx https://www.webmproject.org/code/
#
# DIR=/tmp/vpx && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sL https://codeload.github.com/webmproject/libvpx/tar.gz/v${VPX_VERSION} | \
# tar -zx --strip-components=1 && \
# ./configure --prefix="${PREFIX}" --enable-vp8 --enable-vp9 --enable-pic --enable-shared \
# --disable-debug --disable-examples --disable-docs --disable-install-bins && \
# make && \
# make install
## rm -rf ${DIR}
#####OffLine
DIR=libvpx-1.6.1
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --enable-vp8 --enable-vp9 --enable-pic --enable-shared \
--disable-debug --disable-examples --disable-docs --disable-install-bins && \
make && \
make install && \
cd ..
#### libmp3lame http://lame.sourceforge.net/
#
# DIR=/tmp/lame && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sL https://downloads.sf.net/project/lame/lame/${LAME_VERSION%.*}/lame-${LAME_VERSION}.tar.gz | \
# tar -zx --strip-components=1 && \
# ./configure --prefix="${PREFIX}" --bindir="${PREFIX}/bin" --enable-shared --enable-nasm --enable-pic --disable-frontend && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=lame-3.99.5
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --bindir="${PREFIX}/bin" --enable-shared --enable-nasm --enable-pic --disable-frontend && \
make && \
make install && \
cd ..
#### xvid https://www.xvid.com/
#
# DIR=/tmp/xvid && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO http://downloads.xvid.org/downloads/xvidcore-${XVID_VERSION}.tar.gz && \
# echo ${XVID_SHA256SUM} | sha256sum --check && \
# tar -zx -f xvidcore-${XVID_VERSION}.tar.gz && \
# cd xvidcore/build/generic && \
# ./configure --prefix="${PREFIX}" --bindir="${PREFIX}/bin" --datadir="${DIR}" --enable-shared --enable-shared && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=xvidcore
BASE_DIR=`pwd`
rm -rf ./${DIR}-1.3.4
tar -xvf ./${DIR}-1.3.4.tar.gz && \
cd ./${DIR} && \
cd ./build/generic && \
./configure --prefix="${PREFIX}" --bindir="${PREFIX}/bin" --datadir="${BASE_DIR}/${DIR}" --enable-shared --enable-shared && \
make && \
make install && \
cd ../../../
#### fdk-aac https://github.com/mstorsjo/fdk-aac
#
# DIR=/tmp/fdk-aac && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sL https://github.com/mstorsjo/fdk-aac/archive/v${FDKAAC_VERSION}.tar.gz | \
# tar -zx --strip-components=1 && \
# autoreconf -fiv && \
# ./configure --prefix="${PREFIX}" --enable-shared --datadir="${DIR}" && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
BASE_DIR=`pwd`
DIR=fdk-aac-0.1.5
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
autoreconf -fiv && \
./configure --prefix="${PREFIX}" --enable-shared --datadir="${BASE_DIR}/${DIR}" && \
make && \
make install && \
cd ..
## openjpeg https://github.com/uclouvain/openjpeg
# DIR=/tmp/openjpeg && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sL https://github.com/uclouvain/openjpeg/archive/v${OPENJPEG_VERSION}.tar.gz | \
# tar -zx --strip-components=1 && \
# cmake -DBUILD_THIRDPARTY:BOOL=ON -DCMAKE_INSTALL_PREFIX="${PREFIX}" . && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=openjpeg-2.1.2
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
cmake -DBUILD_THIRDPARTY:BOOL=ON -DCMAKE_INSTALL_PREFIX="${PREFIX}" . && \
make && \
make install && \
cd ..
### freetype https://www.freetype.org/
##RUN \
## DIR=/tmp/freetype && \
## mkdir -p ${DIR} && \
## cd ${DIR} && \
## curl -sLO http://download.savannah.gnu.org/releases/freetype/freetype-${FREETYPE_VERSION}.tar.gz && \
## echo ${FREETYPE_SHA256SUM} | sha256sum --check && \
## tar -zx --strip-components=1 -f freetype-${FREETYPE_VERSION}.tar.gz && \
## ./configure --prefix="${PREFIX}" --disable-static --enable-shared && \
## make && \
## make install && \
## rm -rf ${DIR}
###OffLine
DIR=freetype-${FREETYPE_VERSION}
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
./configure --prefix="${PREFIX}" --disable-static --enable-shared && \
make && \
make install && \
cd ..
### libvstab https://github.com/georgmartius/vid.stab
#
# DIR=/tmp/vid.stab && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO https://github.com/georgmartius/vid.stab/archive/v${LIBVIDSTAB_VERSION}.tar.gz &&\
# echo ${LIBVIDSTAB_SHA256SUM} | sha256sum --check && \
# tar -zx --strip-components=1 -f v${LIBVIDSTAB_VERSION}.tar.gz && \
# cmake -DCMAKE_INSTALL_PREFIX="${PREFIX}" . && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=vid.stab
rm -rf ./${DIR}-1.1.0
tar -xvf ./${DIR}_v1.1.0.tar.gz && \
cd ./${DIR}-1.1.0 && \
cmake -DCMAKE_INSTALL_PREFIX="${PREFIX}" . && \
make && \
make install && \
cd ..
### fridibi https://www.fribidi.org/
# + https://github.com/fribidi/fribidi/issues/8
#
# DIR=/tmp/fribidi && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO https://github.com/fribidi/fribidi/archive/${FRIBIDI_VERSION}.tar.gz && \
# echo ${FRIBIDI_SHA256SUM} | sha256sum --check && \
# tar -zx --strip-components=1 -f ${FRIBIDI_VERSION}.tar.gz && \
# sed -i 's/^SUBDIRS =.*/SUBDIRS=gen.tab charset lib/' Makefile.am && \
# ./bootstrap --no-config && \
# ./configure -prefix="${PREFIX}" --disable-static --enable-shared && \
# make && \
# make install
# rm -rf ${DIR}
####OffLine
DIR=fribidi-0.19.7 && \
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.gz && \
cd ./${DIR} && \
sed -i 's/^SUBDIRS =.*/SUBDIRS=gen.tab charset lib/' Makefile.am && \
./bootstrap --no-config && \
./configure -prefix="${PREFIX}" --disable-static --enable-shared && \
make && \
make install && \
cd ..
### fontconfig https://www.freedesktop.org/wiki/Software/fontconfig/
# DIR=/tmp/fontconfig && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO https://www.freedesktop.org/software/fontconfig/release/fontconfig-${FONTCONFIG_VERSION}.tar.bz2 &&\
# tar -jx --strip-components=1 -f fontconfig-${FONTCONFIG_VERSION}.tar.bz2 && \
# ./configure -prefix="${PREFIX}" --disable-static --enable-shared && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=fontconfig-2.12.4 && \
rm -rf ./${DIR}
tar -xvf ./${DIR}.tar.bz2 && \
cd ./${DIR} && \
./configure -prefix="${PREFIX}" --disable-static --enable-shared && \
make && \
make install && \
cd ..
## libass https://github.com/libass/libass
#need add PKG_CONFIG_PATH
#
# DIR=/tmp/libass && \
# rm -rf ${DIR} && \
# mkdir -p ${DIR} && \
# cd ${DIR} && \
# curl -sLO https://github.com/libass/libass/archive/${LIBASS_VERSION}.tar.gz &&\
# echo ${LIBASS_SHA256SUM} | sha256sum --check && \
# tar -zx --strip-components=1 -f ${LIBASS_VERSION}.tar.gz && \
# ./autogen.sh && \
# ./configure --prefix="${PREFIX}" --disable-static --enable-shared && \
# make && \
# make install
## rm -rf ${DIR}
####OffLine
DIR=libass && \
rm -rf ./${DIR}-0.13.7
tar -xvf ./${DIR}_0.13.7.tar.gz && \
cd ./${DIR}-0.13.7 && \
./autogen.sh && \
./configure --prefix="${PREFIX}" --disable-static --enable-shared && \
make && \
make install && \
cd ..
### ffmpeg https://ffmpeg.org/
#####OffLine
DIR=ffmpeg341 && \
mkdir -p ${DIR} && cd ${DIR} && \
rm -rf ffmpeg-${FFMPEG_VERSION} && \
tar -xvf ffmpeg-${FFMPEG_VERSION}.tar.gz && \
cd ffmpeg-${FFMPEG_VERSION} && \
./configure \
--enable-debug \
--enable-doc \
--disable-ffplay \
--enable-shared \
--enable-avresample \
--enable-libopencore-amrnb \
--enable-libopencore-amrwb \
--enable-gpl \
--enable-libass \
--enable-libfreetype \
--enable-libvidstab \
--enable-libmp3lame \
--enable-libopenjpeg \
--enable-libopus \
--enable-libtheora \
--enable-libvorbis \
--enable-libvpx \
--enable-libx265 \
--enable-libxvid \
--enable-libx264 \
--enable-nonfree \
--enable-openssl \
--enable-libfdk_aac \
--enable-postproc \
--enable-small \
--enable-version3 \
--extra-cflags="-I${PREFIX}/include" \
--extra-ldflags="-L${PREFIX}/lib" \
--extra-libs=-ldl \
--prefix="${PREFIX}" && \
make && \
make install && \
make distclean && \
hash -r && \
cd tools && \
make qt-faststart && \
cp qt-faststart ${PREFIX}/bin
cd ../../I try to run my compiled ffmpeg, it is OK.
#
export LD_LIBRARY_PATH=/opt/ffmpeg/lib/
/opt/ffmpeg/bin/ffmpeg -i "/home/luoy/Videos/芳华.2017.TC720P独家高清中字.mp4" -ss 00:00:00 -t 00:00:01 -f image2 -y "./2_%04d.bmp"
ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.6) 20160609
configuration: --enable-debug --enable-doc --disable-ffplay --enable-shared --enable-avresample --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-gpl --enable-libass --enable-libfreetype --enable-libvidstab --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx265 --enable-libxvid --enable-libx264 --enable-nonfree --enable-openssl --enable-libfdk_aac --enable-postproc --enable-small --enable-version3 --extra-cflags=-I/opt/ffmpeg/include --extra-ldflags=-L/opt/ffmpeg/lib --extra-libs=-ldl --prefix=/opt/ffmpeg
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/luoy/Videos/芳华.2017.TC720P独家高清中字.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1
creation_time : 2017-12-15T16:28:00.000000Z
encoder : Lite MP4 Tool v2.3
Duration: 02:09:09.24, start: 0.000000, bitrate: 1587 kb/s
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1280x720, 1456 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
Metadata:
creation_time : 2017-12-15T16:28:00.000000Z
handler_name : Imported with GPAC 0.4.6-DEV (internal rev. 5)
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 2017-12-15T16:28:45.000000Z
handler_name : GPAC ISO Audio Handler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> bmp (native))
Press [q] to stop, [?] for help
Output #0, image2, to './2_%04d.bmp':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1
encoder : Lavf57.83.100
Stream #0:0(und): Video: bmp, bgr24, 1280x720, q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default)
Metadata:
creation_time : 2017-12-15T16:28:00.000000Z
handler_name : Imported with GPAC 0.4.6-DEV (internal rev. 5)
encoder : Lavc57.107.100 bmp
frame= 24 fps=0.0 q=-0.0 Lsize=N/A time=00:00:01.00 bitrate=N/A dup=1 drop=0 speed= 5.6x
video:64801kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown#
Now I write a simple code, save as a 0_hello_world.c file.
#
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include
#include
#include
#include
#include
#include
#include
#include "libavutil/error.h"
int main(int argc, const char *argv[])
{
av_register_all();
int response = 0;
char *pchar;
// pchar = av_err2str(response);
return 0;
}#
Use the follow command for make, it’s OK.
#
gcc -g -Wall -o build/hello_world -lz 0_hello_world.c
-lavformat -lavcodec -lswscale
-I/opt/ffmpeg/include -L/opt/ffmpeg/lib#
But when I use the "av_err2str" function(uncomment this line) :
’pchar = av_err2str(response) ;’
compile show the following error :#
gcc -g -Wall -o build/hello_world -lz 0_hello_world.c
-lavformat -lavcodec -lswscale
-I/opt/ffmpeg/include -L/opt/ffmpeg/lib
0_hello_world.c: In function ‘main’:
0_hello_world.c:16:9: warning: variable ‘pchar’ set but not used [-Wunused-but-set-variable]
char *pchar;
^
/usr/bin/ld: /tmp/ccgJJ9CV.o: undefined reference to symbol 'av_strerror@@LIBAVUTIL_55'
/opt/ffmpeg/lib/libavutil.so.55: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:10: recipe for target 'hello_world' failed
make: *** [hello_world] Error 1#
As I know "av_register_all" use the "libavformat/avformat.h" header ; "av_err2str" use the "libavutil/error.h" header.
Both the two headers I have included, why "av_err2str" is not OK ?
I guess this is my environment not OK. How can I find the error ?
I have checked my LD_LIBRARY_PATH, it is OK.#
$ echo $LD_LIBRARY_PATH
/opt/ffmpeg/lib:
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