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Médias (1)
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MediaSPIP Simple : futur thème graphique par défaut ?
26 septembre 2013, par
Mis à jour : Octobre 2013
Langue : français
Type : Video
Autres articles (20)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
Submit enhancements and plugins
13 avril 2011If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone.
Sur d’autres sites (5765)
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How to encode resampled PCM-audio to AAC using ffmpeg-API when input pcm samples count not equal 1024
26 septembre 2016, par Aleksei2414904I am working on capturing and streaming audio to RTMP server at a moment. I work under MacOS (in Xcode), so for capturing audio sample-buffer I use AVFoundation-framework. But for encoding and streaming I need to use ffmpeg-API and libfaac encoder. So output format must be AAC (for supporting stream playback on iOS-devices).
And I faced with such problem : audio-capturing device (in my case logitech camera) gives me sample-buffer with 512 LPCM samples, and I can select input sample-rate from 16000, 24000, 36000 or 48000 Hz. When I give these 512 samples to AAC-encoder (configured for appropriate sample-rate), I hear a slow and jerking audio (seems as like pice of silence after each frame).
I figured out (maybe I am wrong), that libfaac encoder accepts audio frames only with 1024 samples. When I set input samplerate to 24000 and resample input sample-buffer to 48000 before encoding, I obtain 1024 resampled samples. After encoding these 1024 sampels to AAC, I hear proper sound on output. But my web-cam produce 512 samples in buffer for any input samplerate, when output sample-rate must be 48000 Hz. So I need to do resampling in any case, and I will not obtain exactly 1024 samples in buffer after resampling.
Is there a way to solve this problem within ffmpeg-API functionality ?
I would be grateful for any help.
PS :
I guess that I can accumulate resampled buffers until count of samples become 1024, and then encode it, but this is stream so there will be troubles with resulting timestamps and with other input devices, and such solution is not suitable.The current issue came out of the problem described in [question] : How to fill audio AVFrame (ffmpeg) with the data obtained from CMSampleBufferRef (AVFoundation) ?
Here is a code with audio-codec configs (there also was video stream but video work fine) :
/*global variables*/
static AVFrame *aframe;
static AVFrame *frame;
AVOutputFormat *fmt;
AVFormatContext *oc;
AVStream *audio_st, *video_st;
Init ()
{
AVCodec *audio_codec, *video_codec;
int ret;
avcodec_register_all();
av_register_all();
avformat_network_init();
avformat_alloc_output_context2(&oc, NULL, "flv", filename);
fmt = oc->oformat;
oc->oformat->video_codec = AV_CODEC_ID_H264;
oc->oformat->audio_codec = AV_CODEC_ID_AAC;
video_st = NULL;
audio_st = NULL;
if (fmt->video_codec != AV_CODEC_ID_NONE)
{ //… /*init video codec*/}
if (fmt->audio_codec != AV_CODEC_ID_NONE) {
audio_codec= avcodec_find_encoder(fmt->audio_codec);
if (!(audio_codec)) {
fprintf(stderr, "Could not find encoder for '%s'\n",
avcodec_get_name(fmt->audio_codec));
exit(1);
}
audio_st= avformat_new_stream(oc, audio_codec);
if (!audio_st) {
fprintf(stderr, "Could not allocate stream\n");
exit(1);
}
audio_st->id = oc->nb_streams-1;
//AAC:
audio_st->codec->sample_fmt = AV_SAMPLE_FMT_S16;
audio_st->codec->bit_rate = 32000;
audio_st->codec->sample_rate = 48000;
audio_st->codec->profile=FF_PROFILE_AAC_LOW;
audio_st->time_base = (AVRational){1, audio_st->codec->sample_rate };
audio_st->codec->channels = 1;
audio_st->codec->channel_layout = AV_CH_LAYOUT_MONO;
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
audio_st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
if (video_st)
{
// …
/*prepare video*/
}
if (audio_st)
{
aframe = avcodec_alloc_frame();
if (!aframe) {
fprintf(stderr, "Could not allocate audio frame\n");
exit(1);
}
AVCodecContext *c;
int ret;
c = audio_st->codec;
ret = avcodec_open2(c, audio_codec, 0);
if (ret < 0) {
fprintf(stderr, "Could not open audio codec: %s\n", av_err2str(ret));
exit(1);
}
//…
}And resampling and encoding audio :
if (mType == kCMMediaType_Audio)
{
CMSampleTimingInfo timing_info;
CMSampleBufferGetSampleTimingInfo(sampleBuffer, 0, &timing_info);
double pts=0;
double dts=0;
AVCodecContext *c;
AVPacket pkt = { 0 }; // data and size must be 0;
int got_packet, ret;
av_init_packet(&pkt);
c = audio_st->codec;
CMItemCount numSamples = CMSampleBufferGetNumSamples(sampleBuffer);
NSUInteger channelIndex = 0;
CMBlockBufferRef audioBlockBuffer = CMSampleBufferGetDataBuffer(sampleBuffer);
size_t audioBlockBufferOffset = (channelIndex * numSamples * sizeof(SInt16));
size_t lengthAtOffset = 0;
size_t totalLength = 0;
SInt16 *samples = NULL;
CMBlockBufferGetDataPointer(audioBlockBuffer, audioBlockBufferOffset, &lengthAtOffset, &totalLength, (char **)(&samples));
const AudioStreamBasicDescription *audioDescription = CMAudioFormatDescriptionGetStreamBasicDescription(CMSampleBufferGetFormatDescription(sampleBuffer));
SwrContext *swr = swr_alloc();
int in_smprt = (int)audioDescription->mSampleRate;
av_opt_set_int(swr, "in_channel_layout", AV_CH_LAYOUT_MONO, 0);
av_opt_set_int(swr, "out_channel_layout", audio_st->codec->channel_layout, 0);
av_opt_set_int(swr, "in_channel_count", audioDescription->mChannelsPerFrame, 0);
av_opt_set_int(swr, "out_channel_count", audio_st->codec->channels, 0);
av_opt_set_int(swr, "out_channel_layout", audio_st->codec->channel_layout, 0);
av_opt_set_int(swr, "in_sample_rate", audioDescription->mSampleRate,0);
av_opt_set_int(swr, "out_sample_rate", audio_st->codec->sample_rate,0);
av_opt_set_sample_fmt(swr, "in_sample_fmt", AV_SAMPLE_FMT_S16, 0);
av_opt_set_sample_fmt(swr, "out_sample_fmt", audio_st->codec->sample_fmt, 0);
swr_init(swr);
uint8_t **input = NULL;
int src_linesize;
int in_samples = (int)numSamples;
ret = av_samples_alloc_array_and_samples(&input, &src_linesize, audioDescription->mChannelsPerFrame,
in_samples, AV_SAMPLE_FMT_S16P, 0);
*input=(uint8_t*)samples;
uint8_t *output=NULL;
int out_samples = av_rescale_rnd(swr_get_delay(swr, in_smprt) +in_samples, (int)audio_st->codec->sample_rate, in_smprt, AV_ROUND_UP);
av_samples_alloc(&output, NULL, audio_st->codec->channels, out_samples, audio_st->codec->sample_fmt, 0);
in_samples = (int)numSamples;
out_samples = swr_convert(swr, &output, out_samples, (const uint8_t **)input, in_samples);
aframe->nb_samples =(int) out_samples;
ret = avcodec_fill_audio_frame(aframe, audio_st->codec->channels, audio_st->codec->sample_fmt,
(uint8_t *)output,
(int) out_samples *
av_get_bytes_per_sample(audio_st->codec->sample_fmt) *
audio_st->codec->channels, 1);
aframe->channel_layout = audio_st->codec->channel_layout;
aframe->channels=audio_st->codec->channels;
aframe->sample_rate= audio_st->codec->sample_rate;
if (timing_info.presentationTimeStamp.timescale!=0)
pts=(double) timing_info.presentationTimeStamp.value/timing_info.presentationTimeStamp.timescale;
aframe->pts=pts*audio_st->time_base.den;
aframe->pts = av_rescale_q(aframe->pts, audio_st->time_base, audio_st->codec->time_base);
ret = avcodec_encode_audio2(c, &pkt, aframe, &got_packet);
if (ret < 0) {
fprintf(stderr, "Error encoding audio frame: %s\n", av_err2str(ret));
exit(1);
}
swr_free(&swr);
if (got_packet)
{
pkt.stream_index = audio_st->index;
pkt.pts = av_rescale_q(pkt.pts, audio_st->codec->time_base, audio_st->time_base);
pkt.dts = av_rescale_q(pkt.dts, audio_st->codec->time_base, audio_st->time_base);
// Write the compressed frame to the media file.
ret = av_interleaved_write_frame(oc, &pkt);
if (ret != 0) {
fprintf(stderr, "Error while writing audio frame: %s\n",
av_err2str(ret));
exit(1);
}
} -
Build libaacplus 2.0.2 for ios
23 mai 2013, par JavanDoes anyone build libaacplus2.0.2(Download here) successed for iOS ? I want ffmpeg support that.It cast me one day to build that, but failed.
This is libaacplus2.0.2/autogen.sh， It was edited, just let it create configure file :
#!/bin/sh
# Run this to set up the build system: configure, makefiles, etc.
# (based on the version in enlightenment's cvs)
package="libaacplus"
srcdir=`dirname $0`
test -z "$srcdir" && srcdir=.
cd "$srcdir"
DIE=0
(autoheader --version) < /dev/null > /dev/null 2>&1 || {
echo
echo "You must have autoconf installed to compile $package."
echo "Download the appropriate package for your distribution,"
echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
DIE=1
}
(autoreconf --version) < /dev/null > /dev/null 2>&1 || {
echo
echo "You must have autoreconf installed to compile $package."
echo "Download the appropriate package for your distribution,"
echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
DIE=1
}
(automake --version) < /dev/null > /dev/null 2>&1 || {
echo
echo "You must have automake installed to compile $package."
echo "Download the appropriate package for your system,"
echo "or get the source from one of the GNU ftp sites"
echo "listed in http://www.gnu.org/order/ftp.html"
DIE=1
}
if test "$DIE" -eq 1; then
exit 1
fi
if test -z "$*"; then
echo "I am going to run ./configure with no arguments - if you wish "
echo "to pass any to it, please specify them on the $0 command line."
fi
echo "Generating configuration files for $package, please wait...."
echo " aclocal $ACLOCAL_FLAGS"
aclocal $ACLOCAL_FLAGS
echo " autoheader"
autoheader
echo " libtoolize --automake"
libtoolize --automake
echo " automake --add-missing $AUTOMAKE_FLAGS"
automake --add-missing $AUTOMAKE_FLAGS
echo " autoreconf"
autoreconf
#$srcdir/configure "$@" && echoAfter run the autogen.sh script :
./autogen.shthe configure file has been created in the same path, them i re-compressed the libaacplus folder named with "libaacplus-2.0.2.tar.gz". Bellow is build script(build-libaacplus.sh) wrote by me :
#!/bin/bash
SRC_PACK='libaacplus-2.0.2.tar.gz'
SRC_ROOT=`pwd`/libaacplus-2.0.2
BUILD_PATH=`pwd`/build
DEVELOPER_ROOT='/Applications/Xcode.app/Contents/Developer'
IOS_VERSION='6.1'
#CC="$DEVELOPER_ROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
CPU_CORE_COUNT=`sysctl -n machdep.cpu.core_count` #Check cpu core number
MAKE_JOBS=$CPU_CORE_COUNT+1
function build_with_args() {
local arch=$1
local platform=$2
local host=$3
local cc=$4
local build=$5
local cpp=$6
local ios_dev_root="$DEVELOPER_ROOT/Platforms/iPhone$platform.platform/Developer"
local sys_root="$ios_dev_root/SDKs/iPhone$platform$IOS_VERSION.sdk"
if [ -d $SRC_ROOT ]; then
echo "Cleaning $SRC_ROOT ..."
rm -rf $SRC_ROOT
echo "Clean $SRC_ROOT completed!"
fi
echo "Decompressing $SRC_PACK ..."
tar -xzf $SRC_PACK
echo "Decompress $SRC_PACK completed!"
cd $SRC_ROOT
export PATH="$ios_dev_root/usr/bin:$DEVELOPER_ROOT/usr/bin:$PATH"
export CC=$cc
export CFLAGS="-I$sys_root/usr/include"
export LDFLAGS="--sysroot=$sys_root -L$sys_root/usr/lib/ -L$sys_root/usr/lib/system"
export CPPFLAGS=$CFLAGS
export CPP=$cpp
export TARGET=$build
./configure \
--prefix="$BUILD_PATH/$arch" \
--host=$host \
--build=$build \
--with-sysroot=$sys_root \
--enable-shared \
--enable-static
echo "Building for $arch ..."
# make -j$MAKE_JOBS
make install
make clean
echo "Build for $arch completed!"
cd -
}
function build_armv7() {
local platform='OS'
local bin_path="$DEVELOPER_ROOT/Platforms/iPhone$platform.platform/Developer/usr/bin"
build_with_args \
'armv7' \
"$platform" \
'arm' \
"$bin_path/arm-apple-darwin10-llvm-gcc-4.2" \
'arm-apple-darwin10' \
"$bin_path/arm-apple-darwin10-llvm-g++-4.2"
}
function build_armv7s() {
local platform='OS'
local bin_path="$DEVELOPER_ROOT/Platforms/iPhone$platform.platform/Developer/usr/bin"
build_with_args \
'armv7s' \
"$platform" \
'arm' \
"$bin_path/arm-apple-darwin10-llvm-gcc-4.2" \
'arm-apple-darwin10' \
"$bin_path/arm-apple-darwin10-llvm-g++-4.2"
}
function build_i386() {
local platform='Simulator'
local bin_path="$DEVELOPER_ROOT/Platforms/iPhone$platform.platform/Developer/usr/bin"
build_with_args \
'i386' \
"$platform" \
'i386' \
"$bin_path/i686-apple-darwin11-llvm-gcc-4.2" \
'i686-apple-darwin11' \
"$bin_path/i686-apple-darwin11-llvm-g++-4.2"
}
if [ -d $BUILD_PATH ]; then
echo "Cleaning $BUILD_PATH..."
rm -rf $BUILD_PATH
fi
build_armv7
#build_armv7s
#build_i386
echo '>>>>>>>>>>>>>>>>>All completed!<<<<<<<<<<<<<<'It failed again and again. Run script->failed->see config.log->modify->Run script ...
I don't know what should I can do. Someone can help me ? Thanks a lot !
The last config.log content is bellow :This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
It was created by libaacplus configure 2.0.2, which was
generated by GNU Autoconf 2.65. Invocation command line was
$ ./configure --prefix=/Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/build/armv7 --host=arm --build=arm-apple-darwin10 --with-sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk --enable-shared --enable-static
## --------- ##
## Platform. ##
## --------- ##
hostname = JieMacBookPro.local
uname -m = x86_64
uname -r = 11.4.2
uname -s = Darwin
uname -v = Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
/usr/bin/uname -p = i386
/bin/uname -X = unknown
/bin/arch = unknown
/usr/bin/arch -k = unknown
/usr/convex/getsysinfo = unknown
/usr/bin/hostinfo = Mach kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
Kernel configured for up to 4 processors.
2 processors are physically available.
4 processors are logically available.
Processor type: i486 (Intel 80486)
Processors active: 0 1 2 3
Primary memory available: 4.00 gigabytes
Default processor set: 127 tasks, 619 threads, 4 processors
Load average: 0.97, Mach factor: 3.02
/bin/machine = unknown
/usr/bin/oslevel = unknown
/bin/universe = unknown
PATH: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin
PATH: /Applications/Xcode.app/Contents/Developer/usr/bin
PATH: /opt/local/bin
PATH: /opt/local/sbin
PATH: /usr/bin
PATH: /bin
PATH: /usr/sbin
PATH: /sbin
PATH: /usr/local/bin
PATH: /usr/X11/bin
PATH: /Library/StartupItems/MySQLCOM
PATH: /usr/local/mysql/bin
## ----------- ##
## Core tests. ##
## ----------- ##
configure:2378: checking for a BSD-compatible install
configure:2446: result: /usr/bin/install -c
configure:2457: checking whether build environment is sane
configure:2512: result: yes
configure:2571: checking for arm-strip
configure:2601: result: no
configure:2611: checking for strip
configure:2627: found /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/strip
configure:2638: result: strip
configure:2650: WARNING: using cross tools not prefixed with host triplet
configure:2663: checking for a thread-safe mkdir -p
configure:2702: result: ./install-sh -c -d
configure:2715: checking for gawk
configure:2745: result: no
configure:2715: checking for mawk
configure:2745: result: no
configure:2715: checking for nawk
configure:2745: result: no
configure:2715: checking for awk
configure:2731: found /usr/bin/awk
configure:2742: result: awk
configure:2753: checking whether make sets $(MAKE)
configure:2775: result: yes
configure:2868: checking for arm-gcc
configure:2895: result: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2
configure:3164: checking for C compiler version
configure:3173: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 --version >&5
arm-apple-darwin10-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2410.2.00)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
configure:3184: $? = 0
configure:3173: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -v >&5
Using built-in specs.
Target: arm-apple-darwin10
Configured with: /private/var/tmp/llvmgcc42_Embedded/llvmgcc42_Embedded-2410.2~111/src/configure --enable-checking --enable-werror --prefix=/Developer/usr/llvm-gcc-4.2 --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --disable-tls --build=i686-apple-darwin10 --enable-llvm=/private/var/tmp/llvmgcc42_Embedded/llvmgcc42_Embedded-2410.2~111/dst-llvmCore/Developer/usr/local --program-prefix=arm-apple-darwin10- --host=x86_64-apple-darwin10 --target=arm-apple-darwin10 --with-gxx-include-dir=/usr/include/c++/4.2.1 --with-build-sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.Internal.sdk
Thread model: posix
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2410.2.00)
configure:3184: $? = 0
configure:3173: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -V >&5
arm-apple-darwin10-llvm-gcc-4.2: '-V' option must have argument
configure:3184: $? = 1
configure:3173: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -qversion >&5
arm-apple-darwin10-llvm-gcc-4.2: no input files
configure:3184: $? = 1
configure:3204: checking whether the C compiler works
configure:3226: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/ -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/system conftest.c >&5
configure:3230: $? = 0
configure:3279: result: yes
configure:3282: checking for C compiler default output file name
configure:3284: result: a.out
configure:3290: checking for suffix of executables
configure:3297: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -o conftest -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/ -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/system conftest.c >&5
configure:3301: $? = 0
configure:3323: result:
configure:3345: checking whether we are cross compiling
configure:3383: result: yes
configure:3388: checking for suffix of object files
configure:3410: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -c -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include conftest.c >&5
configure:3414: $? = 0
configure:3435: result: o
configure:3439: checking whether we are using the GNU C compiler
configure:3458: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -c -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include conftest.c >&5
configure:3458: $? = 0
configure:3467: result: yes
configure:3476: checking whether /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 accepts -g
configure:3496: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -c -g -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include conftest.c >&5
configure:3496: $? = 0
configure:3537: result: yes
configure:3554: checking for /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 option to accept ISO C89
configure:3618: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -c -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include conftest.c >&5
configure:3618: $? = 0
configure:3631: result: none needed
configure:3662: checking for style of include used by make
configure:3690: result: GNU
configure:3716: checking dependency style of /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2
configure:3827: result: gcc3
configure:3843: checking whether /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 and cc understand -c and -o together
configure:3874: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -c conftest.c -o conftest2.o >&5
configure:3878: $? = 0
configure:3884: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -c conftest.c -o conftest2.o >&5
configure:3888: $? = 0
configure:3899: cc -c conftest.c >&5
configure:3903: $? = 0
configure:3911: cc -c conftest.c -o conftest2.o >&5
configure:3915: $? = 0
configure:3921: cc -c conftest.c -o conftest2.o >&5
configure:3925: $? = 0
configure:3943: result: yes
configure:3973: checking how to run the C preprocessor
configure:4043: result: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-g++-4.2
configure:4063: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-g++-4.2 -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include conftest.c
conftest.c:16: error: 'Syntax' does not name a type
configure:4063: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "libaacplus"
| #define PACKAGE_TARNAME "libaacplus"
| #define PACKAGE_VERSION "2.0.2"
| #define PACKAGE_STRING "libaacplus 2.0.2"
| #define PACKAGE_BUGREPORT "Sergiy Guriev <piratfm@ua.fm>"
| #define PACKAGE_URL ""
| #define PACKAGE "libaacplus"
| #define VERSION "2.0.2"
| /* end confdefs.h. */
| #ifdef __STDC__
| # include
| #else
| # include
| #endif
| Syntax error
configure:4063: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-g++-4.2 -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include conftest.c
conftest.c:16: error: 'Syntax' does not name a type
configure:4063: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "libaacplus"
| #define PACKAGE_TARNAME "libaacplus"
| #define PACKAGE_VERSION "2.0.2"
| #define PACKAGE_STRING "libaacplus 2.0.2"
| #define PACKAGE_BUGREPORT "Sergiy Guriev <piratfm@ua.fm>"
| #define PACKAGE_URL ""
| #define PACKAGE "libaacplus"
| #define VERSION "2.0.2"
| /* end confdefs.h. */
| #ifdef __STDC__
| # include
| #else
| # include
| #endif
| Syntax error
configure:4093: error: in `/Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/libaacplus-2.0.2':
configure:4096: error: C preprocessor "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-g++-4.2" fails sanity check
See `config.log' for more details.
## ---------------- ##
## Cache variables. ##
## ---------------- ##
ac_cv_c_compiler_gnu=yes
ac_cv_env_CC_set=set
ac_cv_env_CC_value=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2
ac_cv_env_CFLAGS_set=set
ac_cv_env_CFLAGS_value=-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include
ac_cv_env_CPPFLAGS_set=set
ac_cv_env_CPPFLAGS_value=-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include
ac_cv_env_CPP_set=set
ac_cv_env_CPP_value=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-g++-4.2
ac_cv_env_LDFLAGS_set=set
ac_cv_env_LDFLAGS_value='--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/ -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/system'
ac_cv_env_LIBS_set=
ac_cv_env_LIBS_value=
ac_cv_env_build_alias_set=set
ac_cv_env_build_alias_value=arm-apple-darwin10
ac_cv_env_host_alias_set=set
ac_cv_env_host_alias_value=arm
ac_cv_env_target_alias_set=
ac_cv_env_target_alias_value=
ac_cv_objext=o
ac_cv_path_install='/usr/bin/install -c'
ac_cv_prog_AWK=awk
ac_cv_prog_CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2
ac_cv_prog_CPP=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-g++-4.2
ac_cv_prog_ac_ct_STRIP=strip
ac_cv_prog_cc__Applications_Xcode_app_Contents_Developer_Platforms_iPhoneOS_platform_Developer_usr_bin_arm_apple_darwin10_llvm_gcc_4_2_c_o=yes
ac_cv_prog_cc_c89=
ac_cv_prog_cc_g=yes
ac_cv_prog_make_make_set=yes
am_cv_CC_dependencies_compiler_type=gcc3
## ----------------- ##
## Output variables. ##
## ----------------- ##
AACPLUS_CFLAGS=''
AACPLUS_CPPFLAGS=''
AACPLUS_LIBS=''
AACPLUS_REQUIRES=''
ACLOCAL='${SHELL} /Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/libaacplus-2.0.2/missing --run aclocal-1.12'
AMDEPBACKSLASH='\'
AMDEP_FALSE='#'
AMDEP_TRUE=''
AMTAR='$${TAR-tar}'
AR=''
AS=''
ASH=''
AUTOCONF='${SHELL} /Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/libaacplus-2.0.2/missing --run autoconf'
AUTOHEADER='${SHELL} /Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/libaacplus-2.0.2/missing --run autoheader'
AUTOMAKE='${SHELL} /Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/libaacplus-2.0.2/missing --run automake-1.12'
AWK='awk'
BASH='/bin/sh'
CC='/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2'
CCDEPMODE='depmode=gcc3'
CFLAGS='-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include'
CPP='/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-g++-4.2'
CPPFLAGS='-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/include'
CYGPATH_W='echo'
DEBUG=''
DEFS=''
DEPDIR='.deps'
DLLTOOL=''
DOWNLOADER_PROG=''
DOWNLOADER_PROG_CMD=''
DSYMUTIL=''
DUMPBIN=''
ECHO_C='\c'
ECHO_N=''
ECHO_T=''
EGREP=''
EXEEXT=''
FFTW3_CFLAGS=''
FFTW3_INCFLAGS=''
FFTW3_LDFLAGS=''
FFTW3_LIB=''
FGREP=''
GREP=''
HAVE_PKGCONFIG_FALSE=''
HAVE_PKGCONFIG_TRUE=''
INSTALL_DATA='${INSTALL} -m 644'
INSTALL_PROGRAM='${INSTALL}'
INSTALL_SCRIPT='${INSTALL}'
INSTALL_STRIP_PROGRAM='$(install_sh) -c -s'
LD=''
LDFLAGS='--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/ -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/system'
LIBOBJS=''
LIBS=''
LIBTOOL=''
LIBTOOL_DEPS=''
LIPO=''
LN_S=''
LTLIBOBJS=''
MAKEINFO='${SHELL} /Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/libaacplus-2.0.2/missing --run makeinfo'
MANIFEST_TOOL=''
MKDIR_P='./install-sh -c -d'
NM=''
NMEDIT=''
OBJDUMP=''
OBJEXT='o'
OPT=''
OTOOL64=''
OTOOL=''
PACKAGE='libaacplus'
PACKAGE_BUGREPORT='Sergiy Guriev <piratfm@ua.fm>'
PACKAGE_NAME='libaacplus'
PACKAGE_STRING='libaacplus 2.0.2'
PACKAGE_TARNAME='libaacplus'
PACKAGE_URL=''
PACKAGE_VERSION='2.0.2'
PARAMETER_EXPANSION_STRING_REPLACE_CAPABLE_SHELL=''
PATCH=''
PATH_SEPARATOR=':'
PKGCONFIG=''
PROFILE=''
RANLIB=''
SED=''
SET_MAKE=''
SHELL='/bin/sh'
STRIP='strip'
UNZIP=''
VERSION='2.0.2'
ac_ct_AR=''
ac_ct_CC=''
ac_ct_DUMPBIN=''
am__EXEEXT_FALSE=''
am__EXEEXT_TRUE=''
am__fastdepCC_FALSE='#'
am__fastdepCC_TRUE=''
am__include='include'
am__isrc=''
am__leading_dot='.'
am__nodep='_no'
am__quote=''
am__tar='$${TAR-tar} chof - "$$tardir"'
am__untar='$${TAR-tar} xf -'
bindir='${exec_prefix}/bin'
build='arm-apple-darwin10'
build_alias='arm-apple-darwin10'
build_cpu=''
build_os=''
build_vendor=''
datadir='${datarootdir}'
datarootdir='${prefix}/share'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
dvidir='${docdir}'
exec_prefix='NONE'
host='arm'
host_alias='arm'
host_cpu=''
host_os=''
host_vendor=''
htmldir='${docdir}'
includedir='${prefix}/include'
infodir='${datarootdir}/info'
install_sh='${SHELL} /Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/libaacplus-2.0.2/install-sh'
libdir='${exec_prefix}/lib'
libexecdir='${exec_prefix}/libexec'
localedir='${datarootdir}/locale'
localstatedir='${prefix}/var'
mandir='${datarootdir}/man'
mkdir_p='$(top_builddir)/./install-sh -c -d'
oldincludedir='/usr/include'
pdfdir='${docdir}'
prefix='/Users/md313/Documents/Developer/OpenSource/ffmpef4ios-build-scripts/external-libs/build/armv7'
program_transform_name='s,x,x,'
psdir='${docdir}'
sbindir='${exec_prefix}/sbin'
sharedstatedir='${prefix}/com'
sysconfdir='${prefix}/etc'
target_alias=''
## ----------- ##
## confdefs.h. ##
## ----------- ##
/* confdefs.h */
#define PACKAGE_NAME "libaacplus"
#define PACKAGE_TARNAME "libaacplus"
#define PACKAGE_VERSION "2.0.2"
#define PACKAGE_STRING "libaacplus 2.0.2"
#define PACKAGE_BUGREPORT "Sergiy Guriev <piratfm@ua.fm>"
#define PACKAGE_URL ""
#define PACKAGE "libaacplus"
#define VERSION "2.0.2"
configure: exit 1 -
C - Transcoding to UDP using FFmpeg ?
30 avril 2013, par golmschenkI'm trying to use the FFmpeg libraries to take an existing video file and stream it over a UDP connection. Specifically, I've been looking at the muxing.c and demuxing.c example files in the source code doc/example directory of FFmpeg. The demuxing file presents code which allows an input video to be converted into the video and audio streams. The muxing file presents code which creates fake data and can already be output to a UDP connection as I would like. I've begun work combining the two. Below can be found my code which is basically a copy of the muxing file with some parts replaced/appended with parts of the demuxing file. Unfortunately I'm running into plenty of complications attempting my goal through this approach. Is there an existing source code example which does the transcoding I'm looking for ? Or at least a tutorial on how one might create this ? If not, at least a few pointers might be helpful in directing my work in combing the two files to achieve my goal. Specifically, I'm getting the error :
[NULL @ 0x23b4040] Unable to find a suitable output format for 'udp://localhost:7777'
Could not deduce output format from file extension: using MPEG.
Output #0, mpeg, to 'udp://localhost:7777':Even though the muxing file could accept UDP formats. Any suggestions ? Thank you much !
#include
#include
#include
#include
#include <libavutil></libavutil>mathematics.h>
#include <libavformat></libavformat>avformat.h>
#include <libswscale></libswscale>swscale.h>
/* 5 seconds stream duration */
#define STREAM_DURATION 200.0
#define STREAM_FRAME_RATE 25 /* 25 images/s */
#define STREAM_NB_FRAMES ((int)(STREAM_DURATION * STREAM_FRAME_RATE))
#define STREAM_PIX_FMT AV_PIX_FMT_YUV420P /* default pix_fmt */
//FROM DE
static AVFormatContext *fmt_ctx = NULL;
static AVCodecContext *video_dec_ctx = NULL, *audio_dec_ctx;
static AVStream *video_stream = NULL, *audio_stream = NULL;
static const char *src_filename = NULL;
static const char *video_dst_filename = NULL;
static const char *audio_dst_filename = NULL;
static FILE *video_dst_file = NULL;
static FILE *audio_dst_file = NULL;
static uint8_t *video_dst_data[4] = {NULL};
static int video_dst_linesize[4];
static int video_dst_bufsize;
static uint8_t **audio_dst_data = NULL;
static int audio_dst_linesize;
static int audio_dst_bufsize;
static int video_stream_idx = -1, audio_stream_idx = -1;
static AVFrame *frame = NULL;
static AVPacket pkt;
static int video_frame_count = 0;
static int audio_frame_count = 0;
//END DE
static int sws_flags = SWS_BICUBIC;
/**************************************************************/
/* audio output */
static float t, tincr, tincr2;
static int16_t *samples;
static int audio_input_frame_size;
/* Add an output stream. */
static AVStream *add_stream(AVFormatContext *oc, AVCodec **codec,
enum AVCodecID codec_id)
{
AVCodecContext *c;
AVStream *st;
/* find the encoder */
*codec = avcodec_find_encoder(codec_id);
if (!(*codec)) {
fprintf(stderr, "Could not find encoder for '%s'\n",
avcodec_get_name(codec_id));
exit(1);
}
st = avformat_new_stream(oc, *codec);
if (!st) {
fprintf(stderr, "Could not allocate stream\n");
exit(1);
}
st->id = oc->nb_streams-1;
c = st->codec;
switch ((*codec)->type) {
case AVMEDIA_TYPE_AUDIO:
st->id = 1;
c->sample_fmt = AV_SAMPLE_FMT_S16;
c->bit_rate = 64000;
c->sample_rate = 44100;
c->channels = 2;
break;
case AVMEDIA_TYPE_VIDEO:
c->codec_id = codec_id;
c->bit_rate = 400000;
/* Resolution must be a multiple of two. */
c->width = 352;
c->height = 288;
/* timebase: This is the fundamental unit of time (in seconds) in terms
* of which frame timestamps are represented. For fixed-fps content,
* timebase should be 1/framerate and timestamp increments should be
* identical to 1. */
c->time_base.den = STREAM_FRAME_RATE;
c->time_base.num = 1;
c->gop_size = 12; /* emit one intra frame every twelve frames at most */
c->pix_fmt = STREAM_PIX_FMT;
if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
/* just for testing, we also add B frames */
c->max_b_frames = 2;
}
if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
/* Needed to avoid using macroblocks in which some coeffs overflow.
* This does not happen with normal video, it just happens here as
* the motion of the chroma plane does not match the luma plane. */
c->mb_decision = 2;
}
break;
default:
break;
}
/* Some formats want stream headers to be separate. */
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
c->flags |= CODEC_FLAG_GLOBAL_HEADER;
return st;
}
/**************************************************************/
/* audio output */
static float t, tincr, tincr2;
static int16_t *samples;
static int audio_input_frame_size;
static void open_audio(AVFormatContext *oc, AVCodec *codec, AVStream *st)
{
AVCodecContext *c;
int ret;
c = st->codec;
/* open it */
ret = avcodec_open2(c, codec, NULL);
if (ret < 0) {
fprintf(stderr, "Could not open audio codec: %s\n", av_err2str(ret));
exit(1);
}
/* init signal generator */
t = 0;
tincr = 2 * M_PI * 110.0 / c->sample_rate;
/* increment frequency by 110 Hz per second */
tincr2 = 2 * M_PI * 110.0 / c->sample_rate / c->sample_rate;
if (c->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)
audio_input_frame_size = 10000;
else
audio_input_frame_size = c->frame_size;
samples = av_malloc(audio_input_frame_size *
av_get_bytes_per_sample(c->sample_fmt) *
c->channels);
if (!samples) {
fprintf(stderr, "Could not allocate audio samples buffer\n");
exit(1);
}
}
/* Prepare a 16 bit dummy audio frame of 'frame_size' samples and
* 'nb_channels' channels. */
static void get_audio_frame(int16_t *samples, int frame_size, int nb_channels)
{
int j, i, v;
int16_t *q;
q = samples;
for (j = 0; j < frame_size; j++) {
v = (int)(sin(t) * 10000);
for (i = 0; i < nb_channels; i++)
*q++ = v;
t += tincr;
tincr += tincr2;
}
}
static void write_audio_frame(AVFormatContext *oc, AVStream *st)
{
AVCodecContext *c;
AVPacket pkt = { 0 }; // data and size must be 0;
AVFrame *frame = avcodec_alloc_frame();
int got_packet, ret;
av_init_packet(&pkt);
c = st->codec;
get_audio_frame(samples, audio_input_frame_size, c->channels);
frame->nb_samples = audio_input_frame_size;
avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt,
(uint8_t *)samples,
audio_input_frame_size *
av_get_bytes_per_sample(c->sample_fmt) *
c->channels, 1);
ret = avcodec_encode_audio2(c, &pkt, frame, &got_packet);
if (ret < 0) {
fprintf(stderr, "Error encoding audio frame: %s\n", av_err2str(ret));
exit(1);
}
if (!got_packet)
return;
pkt.stream_index = st->index;
/* Write the compressed frame to the media file. */
ret = av_interleaved_write_frame(oc, &pkt);
if (ret != 0) {
fprintf(stderr, "Error while writing audio frame: %s\n",
av_err2str(ret));
exit(1);
}
avcodec_free_frame(&frame);
}
static void close_audio(AVFormatContext *oc, AVStream *st)
{
avcodec_close(st->codec);
av_free(samples);
}
/**************************************************************/
/* video output */
static AVFrame *frame;
static AVPicture src_picture, dst_picture;
static int frame_count;
static void open_video(AVFormatContext *oc, AVCodec *codec, AVStream *st)
{
int ret;
AVCodecContext *c = st->codec;
/* open the codec */
ret = avcodec_open2(c, codec, NULL);
if (ret < 0) {
fprintf(stderr, "Could not open video codec: %s\n", av_err2str(ret));
exit(1);
}
/* allocate and init a re-usable frame */
frame = avcodec_alloc_frame();
if (!frame) {
fprintf(stderr, "Could not allocate video frame\n");
exit(1);
}
/* Allocate the encoded raw picture. */
ret = avpicture_alloc(&dst_picture, c->pix_fmt, c->width, c->height);
if (ret < 0) {
fprintf(stderr, "Could not allocate picture: %s\n", av_err2str(ret));
exit(1);
}
/* If the output format is not YUV420P, then a temporary YUV420P
* picture is needed too. It is then converted to the required
* output format. */
if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
ret = avpicture_alloc(&src_picture, AV_PIX_FMT_YUV420P, c->width, c->height);
if (ret < 0) {
fprintf(stderr, "Could not allocate temporary picture: %s\n",
av_err2str(ret));
exit(1);
}
}
/* copy data and linesize picture pointers to frame */
*((AVPicture *)frame) = dst_picture;
}
/* Prepare a dummy image. */
static void fill_yuv_image(AVPicture *pict, int frame_index,
int width, int height)
{
int x, y, i;
i = frame_index;
/* Y */
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
pict->data[0][y * pict->linesize[0] + x] = x + y + i * 3;
/* Cb and Cr */
for (y = 0; y < height / 2; y++) {
for (x = 0; x < width / 2; x++) {
pict->data[1][y * pict->linesize[1] + x] = 128 + y + i * 2;
pict->data[2][y * pict->linesize[2] + x] = 64 + x + i * 5;
}
}
}
static void write_video_frame(AVFormatContext *oc, AVStream *st)
{
int ret;
static struct SwsContext *sws_ctx;
AVCodecContext *c = st->codec;
if (frame_count >= STREAM_NB_FRAMES) {
/* No more frames to compress. The codec has a latency of a few
* frames if using B-frames, so we get the last frames by
* passing the same picture again. */
} else {
if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
/* as we only generate a YUV420P picture, we must convert it
* to the codec pixel format if needed */
if (!sws_ctx) {
sws_ctx = sws_getContext(c->width, c->height, AV_PIX_FMT_YUV420P,
c->width, c->height, c->pix_fmt,
sws_flags, NULL, NULL, NULL);
if (!sws_ctx) {
fprintf(stderr,
"Could not initialize the conversion context\n");
exit(1);
}
}
fill_yuv_image(&src_picture, frame_count, c->width, c->height);
sws_scale(sws_ctx,
(const uint8_t * const *)src_picture.data, src_picture.linesize,
0, c->height, dst_picture.data, dst_picture.linesize);
} else {
fill_yuv_image(&dst_picture, frame_count, c->width, c->height);
}
}
if (oc->oformat->flags & AVFMT_RAWPICTURE) {
/* Raw video case - directly store the picture in the packet */
AVPacket pkt;
av_init_packet(&pkt);
pkt.flags |= AV_PKT_FLAG_KEY;
pkt.stream_index = st->index;
pkt.data = dst_picture.data[0];
pkt.size = sizeof(AVPicture);
ret = av_interleaved_write_frame(oc, &pkt);
} else {
AVPacket pkt = { 0 };
int got_packet;
av_init_packet(&pkt);
/* encode the image */
ret = avcodec_encode_video2(c, &pkt, frame, &got_packet);
if (ret < 0) {
fprintf(stderr, "Error encoding video frame: %s\n", av_err2str(ret));
exit(1);
}
/* If size is zero, it means the image was buffered. */
if (!ret && got_packet && pkt.size) {
pkt.stream_index = st->index;
/* Write the compressed frame to the media file. */
ret = av_interleaved_write_frame(oc, &pkt);
} else {
ret = 0;
}
}
if (ret != 0) {
fprintf(stderr, "Error while writing video frame: %s\n", av_err2str(ret));
exit(1);
}
frame_count++;
}
static void close_video(AVFormatContext *oc, AVStream *st)
{
avcodec_close(st->codec);
av_free(src_picture.data[0]);
av_free(dst_picture.data[0]);
av_free(frame);
}
static int open_codec_context(int *stream_idx,
AVFormatContext *fmt_ctx, enum AVMediaType type)
{
int ret;
AVStream *st;
AVCodecContext *dec_ctx = NULL;
AVCodec *dec = NULL;
ret = av_find_best_stream(fmt_ctx, type, -1, -1, NULL, 0);
if (ret < 0) {
fprintf(stderr, "Could not find %s stream in input file '%s'\n",
av_get_media_type_string(type), src_filename);
return ret;
} else {
*stream_idx = ret;
st = fmt_ctx->streams[*stream_idx];
/* find decoder for the stream */
dec_ctx = st->codec;
dec = avcodec_find_decoder(dec_ctx->codec_id);
if (!dec) {
fprintf(stderr, "Failed to find %s codec\n",
av_get_media_type_string(type));
return ret;
}
if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) {
fprintf(stderr, "Failed to open %s codec\n",
av_get_media_type_string(type));
return ret;
}
}
return 0;
}
/**************************************************************/
/* media file output */
int main(int argc, char **argv)
{
const char *filename;
AVOutputFormat *fmt;
AVFormatContext *oc;
AVStream *audio_st, *video_st;
AVCodec *audio_codec, *video_codec;
double audio_pts, video_pts;
int ret = 0, got_frame;;
/* Initialize libavcodec, and register all codecs and formats. */
av_register_all();
if (argc != 3) {
printf("usage: %s input_file output_file\n"
"\n", argv[0]);
return 1;
}
src_filename = argv[1];
filename = argv[2];
/* allocate the output media context */
avformat_alloc_output_context2(&oc, NULL, NULL, filename);
if (!oc) {
printf("Could not deduce output format from file extension: using MPEG.\n");
avformat_alloc_output_context2(&oc, NULL, "mpeg", filename);
}
if (!oc) {
return 1;
}
fmt = oc->oformat;
/* Add the audio and video streams using the default format codecs
* and initialize the codecs. */
video_stream = NULL;
audio_stream = NULL;
//FROM DE
/* open input file, and allocate format context */
if (avformat_open_input(&fmt_ctx, src_filename, NULL, NULL) < 0) {
fprintf(stderr, "Could not open source file %s\n", src_filename);
exit(1);
}
/* retrieve stream information */
if (avformat_find_stream_info(fmt_ctx, NULL) < 0) {
fprintf(stderr, "Could not find stream information\n");
exit(1);
}
if (open_codec_context(&video_stream_idx, fmt_ctx, AVMEDIA_TYPE_VIDEO) >= 0) {
video_stream = fmt_ctx->streams[video_stream_idx];
video_dec_ctx = video_stream->codec;
/* allocate image where the decoded image will be put */
ret = av_image_alloc(video_dst_data, video_dst_linesize,
video_dec_ctx->width, video_dec_ctx->height,
video_dec_ctx->pix_fmt, 1);
if (ret < 0) {
fprintf(stderr, "Could not allocate raw video buffer\n");
goto end;
}
video_dst_bufsize = ret;
}
if (open_codec_context(&audio_stream_idx, fmt_ctx, AVMEDIA_TYPE_AUDIO) >= 0) {
int nb_planes;
audio_stream = fmt_ctx->streams[audio_stream_idx];
audio_dec_ctx = audio_stream->codec;
nb_planes = av_sample_fmt_is_planar(audio_dec_ctx->sample_fmt) ?
audio_dec_ctx->channels : 1;
audio_dst_data = av_mallocz(sizeof(uint8_t *) * nb_planes);
if (!audio_dst_data) {
fprintf(stderr, "Could not allocate audio data buffers\n");
ret = AVERROR(ENOMEM);
goto end;
}
}
//END DE
/* Now that all the parameters are set, we can open the audio and
* video codecs and allocate the necessary encode buffers. */
if (video_stream)
open_video(oc, video_codec, video_stream);
if (audio_stream)
open_audio(oc, audio_codec, audio_stream);
av_dump_format(oc, 0, filename, 1);
/* open the output file, if needed */
if (!(fmt->flags & AVFMT_NOFILE)) {
ret = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE);
if (ret < 0) {
fprintf(stderr, "Could not open '%s': %s\n", filename,
av_err2str(ret));
return 1;
}
}
/* Write the stream header, if any. */
ret = avformat_write_header(oc, NULL);
if (ret < 0) {
fprintf(stderr, "Error occurred when opening output file: %s\n",
av_err2str(ret));
return 1;
}
if (frame)
frame->pts = 0;
for (;;) {
/* Compute current audio and video time. */
if (audio_stream)
audio_pts = (double)audio_stream->pts.val * audio_stream->time_base.num / audio_stream->time_base.den;
else
audio_pts = 0.0;
if (video_stream)
video_pts = (double)video_stream->pts.val * video_stream->time_base.num /
video_stream->time_base.den;
else
video_pts = 0.0;
if ((!audio_stream || audio_pts >= STREAM_DURATION) &&
(!video_stream || video_pts >= STREAM_DURATION))
break;
/* write interleaved audio and video frames */
if (!video_stream || (video_stream && audio_st && audio_pts < video_pts)) {
write_audio_frame(oc, audio_stream);
} else {
write_video_frame(oc, video_stream);
frame->pts += av_rescale_q(1, video_stream->codec->time_base, video_stream->time_base);
}
}
/* Write the trailer, if any. The trailer must be written before you
* close the CodecContexts open when you wrote the header; otherwise
* av_write_trailer() may try to use memory that was freed on
* av_codec_close(). */
av_write_trailer(oc);
/* Close each codec. */
if (video_st)
close_video(oc, video_st);
if (audio_st)
close_audio(oc, audio_st);
if (!(fmt->flags & AVFMT_NOFILE))
/* Close the output file. */
avio_close(oc->pb);
/* free the stream */
avformat_free_context(oc);
end:
if (video_dec_ctx)
avcodec_close(video_dec_ctx);
if (audio_dec_ctx)
avcodec_close(audio_dec_ctx);
avformat_close_input(&fmt_ctx);
if (video_dst_file)
fclose(video_dst_file);
if (audio_dst_file)
fclose(audio_dst_file);
av_free(frame);
av_free(video_dst_data[0]);
av_free(audio_dst_data);
return 0;
}
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