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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 -
Possibilité de déploiement en ferme
12 avril 2011, parMediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...) -
Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs
12 avril 2011, parLa manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.
Sur d’autres sites (11245)
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ffmpeg audio synch issue - fractional framerate
29 mars 2013, par JoeCitizenWe are working on an Android app which uses the ffmpeg library via JNI to edit the frames of a video while keeping size, codec etc the same.
We are having an issue where the audio of the output video is getting out of sync with the video. We believe this is because some input videos have a frame rate which isn't a whole number e.g 25.66 fps and our output will be at 25fps. We have tried to change the time_base field of the output codec to keep the precision i.e by multiply the numerator and denominator but it makes the output frame rate ridiculously high.
Does anyone know how to force ffmpeg to use the exact same output frame rate as the one it reads in ? We have not found a way to output videos with a fractional frame rate.
Example of setting up the output codec :
c = st->codec;
c->codec_id = codec_id;
c->codec_type = AVMEDIA_TYPE_VIDEO;
c->bit_rate = inputCodecCtx->bit_rate;
c->width = inputCodecCtx->width;
c->height = inputCodecCtx->height;
c->time_base.num = 1000;
c->time_base.den = (int)(fps*1000);//fps of the input video *1000 to keep precision
c->gop_size = inputCodecCtx->gop_size;
c->pix_fmt = inputCodecCtx->pix_fmt;
static int write_video_frame(AVFormatContext *oc, AVStream *st, AVFrame *newpict, double fps)
{
int ret = 0;
AVCodecContext* c = st->codec;
AVPacket pkt;
av_init_packet(&pkt);
if (pkt.pts != AV_NOPTS_VALUE)
{
pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, st->time_base);
}
if (pkt.dts != AV_NOPTS_VALUE)
{
pkt.dts = av_rescale_q(c->coded_frame->pts, c->time_base, st->time_base);
}
.....
} -
av_read_frame function in ffmpeg in android always returning packet.stream_index as 0
31 juillet 2013, par droidmadI am using the following standard code pasted below (ref : http://dranger.com/ffmpeg/) to use ffmpeg in android using ndk. My code is working fine in ubuntu 10.04 using gcc compiler. But I am facing an issue in android.The issue is
av_read_frame(pFormatCtx, &packet)is always returningpacket.stream_index=0. I have tested my code with various rtsp urls and I have the same behaviour in all cases. I do not have any linking or compiling issues as everything seems to be working fine except this issue. I am trying to solve this from last 2 days but I am stuck badly.Please point me in right direction.#include
#include <android></android>log.h>
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libswscale></libswscale>swscale.h>
#include
#define DEBUG_TAG "mydebug_ndk"
jint Java_com_example_tut2_MainActivity_myfunc(JNIEnv * env, jobject this,jstring myjurl) {
AVFormatContext *pFormatCtx = NULL;
int i, videoStream;
AVCodecContext *pCodecCtx = NULL;
AVCodec *pCodec = NULL;
AVFrame *pFrame = NULL;
AVPacket packet;
int frameFinished;
AVDictionary *optionsDict = NULL;
struct SwsContext *sws_ctx = NULL;
jboolean isCopy;
const char * mycurl = (*env)->GetStringUTFChars(env, myjurl, &isCopy);
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:p2: [%s]", mycurl);
// Register all formats and codecs
av_register_all();
avformat_network_init();
// Open video file
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:before_open");
if(avformat_open_input(&pFormatCtx, mycurl, NULL, NULL)!=0)
return -1;
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "start: %d\t%d\n",pFormatCtx->raw_packet_buffer_remaining_size,pFormatCtx->max_index_size);
(*env)->ReleaseStringUTFChars(env, myjurl, mycurl);
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:before_stream");
// Retrieve stream information
if(avformat_find_stream_info(pFormatCtx, NULL)<0)
return -1;
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_stream");
// Find the first video stream
videoStream=-1;
for(i=0; inb_streams; i++)
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
videoStream=i;
break;
}
if(videoStream==-1)
return -1; // Didn't find a video stream
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_videostream");
// Get a pointer to the codec context for the video stream
pCodecCtx=pFormatCtx->streams[videoStream]->codec;
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_codec_context");
// Find the decoder for the video stream
pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_decoder");
if(pCodec==NULL)
return -1;
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:found_decoder");
// Open codec
if(avcodec_open2(pCodecCtx, pCodec, &optionsDict)<0)
return -1;
// Allocate video frame
pFrame=avcodec_alloc_frame();
sws_ctx = sws_getContext(pCodecCtx->width,pCodecCtx->height,pCodecCtx->pix_fmt,pCodecCtx->width,
pCodecCtx->height,PIX_FMT_YUV420P,SWS_BILINEAR,NULL,NULL,NULL);
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:before_while");
int count=0;
while(av_read_frame(pFormatCtx, &packet)>=0) {
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "entered while: %d %d %d\n", packet.duration,packet.stream_index,packet.size);
if(packet.stream_index==videoStream) {
// Decode video frame
//break;
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished,&packet);
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:in_while");
if(frameFinished) {
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:gng_out_of_while");
break;
}
}
// Free the packet that was allocated by av_read_frame
av_free_packet(&packet);
if(++count>1000)
return -2; //infinite while loop
}
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_while");
// Free the YUV frame
av_free(pFrame);
// Close the codec
avcodec_close(pCodecCtx);
// Close the video file
avformat_close_input(&pFormatCtx);
return 0;
} -
FFMPEG dumping a RTSP streaming works on Windows but not in Ubuntu
9 août 2016, par cuentafalsa7I have a camera with a
RTSPserver. When I try to save the streaming, usingFFMPEGin Windows works ; in Ubuntu,FFMPEGit doesn’t.The command, in Windows is :
ffmpeg.exe -i "rtsp://192.168.1.10:1236/?videoapi=mc&h264=1000-20-1280-960" -r 20 test.mp4In Linux :
ffmpeg -i "rtsp://192.168.1.10:1236/?videoapi=mc&h264=1000-20-1280-960" -r 20 test.mp4The output in Linux is :
$ ffmpeg -i "rtsp://192.168.1.10:1236/?videoapi=mr&h264=1000-20-1280-960" -r 20 test.mp4
ffmpeg version 2.8.6-1ubuntu2 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.3.1 (Ubuntu 5.3.1-11ubuntu1) 20160311
configuration: --prefix=/usr --extra-version=1ubuntu2 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
[rtsp @ 0x1f18340] UDP timeout, retrying with TCP
[rtsp @ 0x1f18340] Nonmatching transport in server reply
[rtsp @ 0x1f18340] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
rtsp://192.168.1.10:1236/?videoapi=mr&h264=1000-20-1280-960: could not find codec parameters
Input #0, rtsp, from 'rtsp://192.168.1.10:1236/?videoapi=mr&h264=1000-20-1280-960':
Metadata:
title : Unnamed
comment : N/A
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264, none, 90k tbr, 90k tbn, 180k tbc
Output #0, mp4, to 'test.mp4':
Output file #0 does not contain any streamThe ffmpeg.exe output is :
>ffmpeg.exe
ffmpeg version N-81300-gce2217b Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-lib
ebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfree
type --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-lib
openjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-
libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 28.100 / 55. 28.100
libavcodec 57. 51.100 / 57. 51.100
libavformat 57. 46.100 / 57. 46.100
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 50.100 / 6. 50.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Use -h to get full help or, even better, run 'man ffmpeg'The ffmpeg output in Ubuntu is :
$ ffmpeg
ffmpeg version 2.8.6-1ubuntu2 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.3.1 (Ubuntu 5.3.1-11ubuntu1) 20160311
configuration: --prefix=/usr --extra-version=1ubuntu2 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Use -h to get full help or, even better, run 'man ffmpeg'I’m using Windows 7 64 bits and Ubuntu 16.04.
I have tried to increase the suggested values but didn’t work either.
Any idea, except switching to Windows ?
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