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Médias (1)
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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (106)
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Le plugin : Podcasts.
14 juillet 2010, parLe problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
Types de fichiers supportés dans les flux
Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...) -
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
Emballe médias : à quoi cela sert ?
4 février 2011, parCe plugin vise à gérer des sites de mise en ligne de documents de tous types.
Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;
Sur d’autres sites (8605)
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prores : Reject negative run and level values
10 octobre 2013, par Luca Barbato -
Live555 : X264 Stream Live source based on "testOnDemandRTSPServer"
12 janvier 2017, par user2660369I am trying to create a rtsp Server that streams the OpenGL output of my program. I had a look at How to write a Live555 FramedSource to allow me to stream H.264 live, but I need the stream to be unicast. So I had a look at testOnDemandRTSPServer. Using the same Code fails. To my understanding I need to provide memory in which I store my h264 frames so the OnDemandServer can read them on Demand.
H264VideoStreamServerMediaSubsession.cpp
H264VideoStreamServerMediaSubsession*
H264VideoStreamServerMediaSubsession::createNew(UsageEnvironment& env,
Boolean reuseFirstSource) {
return new H264VideoStreamServerMediaSubsession(env, reuseFirstSource);
}
H264VideoStreamServerMediaSubsession::H264VideoStreamServerMediaSubsession(UsageEnvironment& env, Boolean reuseFirstSource)
: OnDemandServerMediaSubsession(env, reuseFirstSource), fAuxSDPLine(NULL), fDoneFlag(0), fDummyRTPSink(NULL) {
}
H264VideoStreamServerMediaSubsession::~H264VideoStreamServerMediaSubsession() {
delete[] fAuxSDPLine;
}
static void afterPlayingDummy(void* clientData) {
H264VideoStreamServerMediaSubsession* subsess = (H264VideoStreamServerMediaSubsession*)clientData;
subsess->afterPlayingDummy1();
}
void H264VideoStreamServerMediaSubsession::afterPlayingDummy1() {
// Unschedule any pending 'checking' task:
envir().taskScheduler().unscheduleDelayedTask(nextTask());
// Signal the event loop that we're done:
setDoneFlag();
}
static void checkForAuxSDPLine(void* clientData) {
H264VideoStreamServerMediaSubsession* subsess = (H264VideoStreamServerMediaSubsession*)clientData;
subsess->checkForAuxSDPLine1();
}
void H264VideoStreamServerMediaSubsession::checkForAuxSDPLine1() {
char const* dasl;
if (fAuxSDPLine != NULL) {
// Signal the event loop that we're done:
setDoneFlag();
} else if (fDummyRTPSink != NULL && (dasl = fDummyRTPSink->auxSDPLine()) != NULL) {
fAuxSDPLine = strDup(dasl);
fDummyRTPSink = NULL;
// Signal the event loop that we're done:
setDoneFlag();
} else {
// try again after a brief delay:
int uSecsToDelay = 100000; // 100 ms
nextTask() = envir().taskScheduler().scheduleDelayedTask(uSecsToDelay,
(TaskFunc*)checkForAuxSDPLine, this);
}
}
char const* H264VideoStreamServerMediaSubsession::getAuxSDPLine(RTPSink* rtpSink, FramedSource* inputSource) {
if (fAuxSDPLine != NULL) return fAuxSDPLine; // it's already been set up (for a previous client)
if (fDummyRTPSink == NULL) { // we're not already setting it up for another, concurrent stream
// Note: For H264 video files, the 'config' information ("profile-level-id" and "sprop-parameter-sets") isn't known
// until we start reading the file. This means that "rtpSink"s "auxSDPLine()" will be NULL initially,
// and we need to start reading data from our file until this changes.
fDummyRTPSink = rtpSink;
// Start reading the file:
fDummyRTPSink->startPlaying(*inputSource, afterPlayingDummy, this);
// Check whether the sink's 'auxSDPLine()' is ready:
checkForAuxSDPLine(this);
}
envir().taskScheduler().doEventLoop(&fDoneFlag);
return fAuxSDPLine;
}
FramedSource* H264VideoStreamServerMediaSubsession::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
estBitrate = 500; // kb
megamol::remotecontrol::View3D_MRC *parent = (megamol::remotecontrol::View3D_MRC*)this->parent;
return H264VideoStreamFramer::createNew(envir(), parent->h264FramedSource);
}
RTPSink* H264VideoStreamServerMediaSubsession::createNewRTPSink(Groupsock* rtpGroupsock, unsigned char rtpPayloadTypeIfDynamic, FramedSource* /*inputSource*/) {
return H264VideoRTPSink::createNew(envir(), rtpGroupsock, rtpPayloadTypeIfDynamic);
}FramedSource.cpp
H264FramedSource* H264FramedSource::createNew(UsageEnvironment& env,
unsigned preferredFrameSize,
unsigned playTimePerFrame)
{
return new H264FramedSource(env, preferredFrameSize, playTimePerFrame);
}
H264FramedSource::H264FramedSource(UsageEnvironment& env,
unsigned preferredFrameSize,
unsigned playTimePerFrame)
: FramedSource(env),
fPreferredFrameSize(fMaxSize),
fPlayTimePerFrame(playTimePerFrame),
fLastPlayTime(0),
fCurIndex(0)
{
x264_param_default_preset(&param, "veryfast", "zerolatency");
param.i_threads = 1;
param.i_width = 1024;
param.i_height = 768;
param.i_fps_num = 30;
param.i_fps_den = 1;
// Intra refres:
param.i_keyint_max = 60;
param.b_intra_refresh = 1;
//Rate control:
param.rc.i_rc_method = X264_RC_CRF;
param.rc.f_rf_constant = 25;
param.rc.f_rf_constant_max = 35;
param.i_sps_id = 7;
//For streaming:
param.b_repeat_headers = 1;
param.b_annexb = 1;
x264_param_apply_profile(&param, "baseline");
param.i_log_level = X264_LOG_ERROR;
encoder = x264_encoder_open(&param);
pic_in.i_type = X264_TYPE_AUTO;
pic_in.i_qpplus1 = 0;
pic_in.img.i_csp = X264_CSP_I420;
pic_in.img.i_plane = 3;
x264_picture_alloc(&pic_in, X264_CSP_I420, 1024, 768);
convertCtx = sws_getContext(1024, 768, PIX_FMT_RGBA, 1024, 768, PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
eventTriggerId = envir().taskScheduler().createEventTrigger(deliverFrame0);
}
H264FramedSource::~H264FramedSource()
{
envir().taskScheduler().deleteEventTrigger(eventTriggerId);
eventTriggerId = 0;
}
void H264FramedSource::AddToBuffer(uint8_t* buf, int surfaceSizeInBytes)
{
uint8_t* surfaceData = (new uint8_t[surfaceSizeInBytes]);
memcpy(surfaceData, buf, surfaceSizeInBytes);
int srcstride = 1024*4;
sws_scale(convertCtx, &surfaceData, &srcstride,0, 768, pic_in.img.plane, pic_in.img.i_stride);
x264_nal_t* nals = NULL;
int i_nals = 0;
int frame_size = -1;
frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
static bool finished = false;
if (frame_size >= 0)
{
static bool alreadydone = false;
if(!alreadydone)
{
x264_encoder_headers(encoder, &nals, &i_nals);
alreadydone = true;
}
for(int i = 0; i < i_nals; ++i)
{
m_queue.push(nals[i]);
}
}
delete [] surfaceData;
surfaceData = nullptr;
envir().taskScheduler().triggerEvent(eventTriggerId, this);
}
void H264FramedSource::doGetNextFrame()
{
deliverFrame();
}
void H264FramedSource::deliverFrame0(void* clientData)
{
((H264FramedSource*)clientData)->deliverFrame();
}
void H264FramedSource::deliverFrame()
{
x264_nal_t nalToDeliver;
if (fPlayTimePerFrame > 0 && fPreferredFrameSize > 0) {
if (fPresentationTime.tv_sec == 0 && fPresentationTime.tv_usec == 0) {
// This is the first frame, so use the current time:
gettimeofday(&fPresentationTime, NULL);
} else {
// Increment by the play time of the previous data:
unsigned uSeconds = fPresentationTime.tv_usec + fLastPlayTime;
fPresentationTime.tv_sec += uSeconds/1000000;
fPresentationTime.tv_usec = uSeconds%1000000;
}
// Remember the play time of this data:
fLastPlayTime = (fPlayTimePerFrame*fFrameSize)/fPreferredFrameSize;
fDurationInMicroseconds = fLastPlayTime;
} else {
// We don't know a specific play time duration for this data,
// so just record the current time as being the 'presentation time':
gettimeofday(&fPresentationTime, NULL);
}
if(!m_queue.empty())
{
m_queue.wait_and_pop(nalToDeliver);
uint8_t* newFrameDataStart = (uint8_t*)0xD15EA5E;
newFrameDataStart = (uint8_t*)(nalToDeliver.p_payload);
unsigned newFrameSize = nalToDeliver.i_payload;
// Deliver the data here:
if (newFrameSize > fMaxSize) {
fFrameSize = fMaxSize;
fNumTruncatedBytes = newFrameSize - fMaxSize;
}
else {
fFrameSize = newFrameSize;
}
memcpy(fTo, nalToDeliver.p_payload, nalToDeliver.i_payload);
FramedSource::afterGetting(this);
}
}Relevant part of the RTSP-Server Therad
RTSPServer* rtspServer = RTSPServer::createNew(*(parent->env), 8554, NULL);
if (rtspServer == NULL) {
*(parent->env) << "Failed to create RTSP server: " << (parent->env)->getResultMsg() << "\n";
exit(1);
}
char const* streamName = "Stream";
parent->h264FramedSource = H264FramedSource::createNew(*(parent->env), 0, 0);
H264VideoStreamServerMediaSubsession *h264VideoStreamServerMediaSubsession = H264VideoStreamServerMediaSubsession::createNew(*(parent->env), true);
h264VideoStreamServerMediaSubsession->parent = parent;
sms->addSubsession(h264VideoStreamServerMediaSubsession);
rtspServer->addServerMediaSession(sms);
parent->env->taskScheduler().doEventLoop(); // does not returnOnce a connection exists the render loop calls
h264FramedSource->AddToBuffer(videoData, 1024*768*4); -
Getting “field has incomplete type” and "conflicting types"
4 novembre 2013, par VietI'm trying build pjsip from source with video support by gcc on ubuntu. After i success full run ./configure and make dep, i run make and i have error below :
../src/pjmedia/ffmpeg_util.c:46:18: error: field ‘codec_id’ has incomplete type
../src/pjmedia/ffmpeg_util.c:148:13: error: conflicting types for ‘pjmedia_format_id_to_CodecID’
../src/pjmedia/ffmpeg_util.h:23:13: note: previous declaration of ‘pjmedia_format_id_to_CodecID’ was here
../src/pjmedia/ffmpeg_util.c: In function ‘pjmedia_format_id_to_CodecID’:
../src/pjmedia/ffmpeg_util.c:154:35: warning: comparison between pointer and integer [enabled by default]
../src/pjmedia/ffmpeg_util.c:155:6: error: dereferencing pointer to incomplete type
../src/pjmedia/ffmpeg_util.c:155:6: warning: statement with no effect [-Wunused-value]
../src/pjmedia/ffmpeg_util.c:160:5: error: dereferencing pointer to incomplete type
../src/pjmedia/ffmpeg_util.c:160:5: warning: statement with no effect [-Wunused-value]
../src/pjmedia/ffmpeg_util.c: At top level:
../src/pjmedia/ffmpeg_util.c:164:55: error: parameter 1 (‘codec_id’) has incomplete typeHere is the code in ffmpeg_util.h and ffmpeg_util.c
ffmpeg_util.h
#ifndef __PJMEDIA_FFMPEG_UTIL_H__
#define __PJMEDIA_FFMPEG_UTIL_H__
#include <pjmedia></pjmedia>format.h>
#ifdef _MSC_VER
# ifndef __cplusplus
# define inline _inline
# endif
# pragma warning(disable:4244) /* possible loss of data */
#endif
#include <libavutil></libavutil>avutil.h>
#include <libavcodec></libavcodec>avcodec.h>
void pjmedia_ffmpeg_add_ref();
void pjmedia_ffmpeg_dec_ref();
pj_status_t pjmedia_format_id_to_PixelFormat(pjmedia_format_id fmt_id,
enum PixelFormat *pixel_format);
pj_status_t PixelFormat_to_pjmedia_format_id(enum PixelFormat pf,
pjmedia_format_id *fmt_id);
pj_status_t pjmedia_format_id_to_CodecID(pjmedia_format_id fmt_id,
enum CodecID *codec_id);
pj_status_t CodecID_to_pjmedia_format_id(enum CodecID codec_id,
pjmedia_format_id *fmt_id);
#endif /* __PJMEDIA_FFMPEG_UTIL_H__ */ffmpeg_util.c
#include <pjmedia></pjmedia>types.h>
#include <pj></pj>errno.h>
#include <pj></pj>log.h>
#include <pj></pj>string.h>
#if PJMEDIA_HAS_LIBAVFORMAT && PJMEDIA_HAS_LIBAVUTIL
#include "ffmpeg_util.h"
#include <libavformat></libavformat>avformat.h>
#define MAKE_VER(mj,mn,mi) ((mj << 16) | (mn << 8) | (mi << 0))
#define VER_AT_LEAST(mj,mn,mi) (MAKE_VER(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \
LIBAVUTIL_VERSION_MICRO) >= \
MAKE_VER(mj,mn,mi))
/* Conversion table between pjmedia_format_id and PixelFormat */
static const struct ffmpeg_fmt_table_t
{
pjmedia_format_id id;
enum PixelFormat pf;
} ffmpeg_fmt_table[] =
{
{ PJMEDIA_FORMAT_RGBA, PIX_FMT_RGBA},
{ PJMEDIA_FORMAT_RGB24,PIX_FMT_BGR24},
{ PJMEDIA_FORMAT_BGRA, PIX_FMT_BGRA},
#if VER_AT_LEAST(51,20,1)
{ PJMEDIA_FORMAT_GBRP, PIX_FMT_GBR24P},
#endif
{ PJMEDIA_FORMAT_AYUV, PIX_FMT_NONE},
{ PJMEDIA_FORMAT_YUY2, PIX_FMT_YUYV422},
{ PJMEDIA_FORMAT_UYVY, PIX_FMT_UYVY422},
{ PJMEDIA_FORMAT_I420, PIX_FMT_YUV420P},
//{ PJMEDIA_FORMAT_YV12, PIX_FMT_YUV420P},
{ PJMEDIA_FORMAT_I422, PIX_FMT_YUV422P},
{ PJMEDIA_FORMAT_I420JPEG, PIX_FMT_YUVJ420P},
{ PJMEDIA_FORMAT_I422JPEG, PIX_FMT_YUVJ422P},
};
/* Conversion table between pjmedia_format_id and CodecID */
static const struct ffmpeg_codec_table_t
{
pjmedia_format_id id;
enum CodecID codec_id;
} ffmpeg_codec_table[] =
{
{PJMEDIA_FORMAT_H261, CODEC_ID_H261},
{PJMEDIA_FORMAT_H263, CODEC_ID_H263},
{PJMEDIA_FORMAT_H263P, CODEC_ID_H263P},
{PJMEDIA_FORMAT_H264, CODEC_ID_H264},
{PJMEDIA_FORMAT_MPEG1VIDEO, CODEC_ID_MPEG1VIDEO},
{PJMEDIA_FORMAT_MPEG2VIDEO, CODEC_ID_MPEG2VIDEO},
{PJMEDIA_FORMAT_MPEG4, CODEC_ID_MPEG4},
{PJMEDIA_FORMAT_MJPEG, CODEC_ID_MJPEG}
};
static int pjmedia_ffmpeg_ref_cnt;
static void ffmpeg_log_cb(void* ptr, int level, const char* fmt, va_list vl);
void pjmedia_ffmpeg_add_ref()
{
if (pjmedia_ffmpeg_ref_cnt++ == 0) {
av_log_set_level(AV_LOG_ERROR);
av_log_set_callback(&ffmpeg_log_cb);
av_register_all();
}
}
void pjmedia_ffmpeg_dec_ref()
{
if (pjmedia_ffmpeg_ref_cnt-- == 1) {
/* How to shutdown ffmpeg? */
}
if (pjmedia_ffmpeg_ref_cnt < 0) pjmedia_ffmpeg_ref_cnt = 0;
}
static void ffmpeg_log_cb(void* ptr, int level, const char* fmt, va_list vl)
{
const char *LOG_SENDER = "ffmpeg";
enum { LOG_LEVEL = 5 };
char buf[100];
int bufsize = sizeof(buf), len;
pj_str_t fmt_st;
/* Custom callback needs to filter log level by itself */
if (level > av_log_get_level())
return;
/* Add original ffmpeg sender to log format */
if (ptr) {
AVClass* avc = *(AVClass**)ptr;
len = pj_ansi_snprintf(buf, bufsize, "%s: ", avc->item_name(ptr));
bufsize -= len;
}
/* Copy original log format */
len = pj_ansi_strlen(fmt);
if (len > bufsize-1)
len = bufsize-1;
pj_memcpy(buf+sizeof(buf)-bufsize, fmt, len);
bufsize -= len;
/* Trim log format */
pj_strset(&fmt_st, buf, sizeof(buf)-bufsize);
pj_strrtrim(&fmt_st);
buf[fmt_st.slen] = '\0';
pj_log(LOG_SENDER, LOG_LEVEL, buf, vl);
}
pj_status_t pjmedia_format_id_to_PixelFormat(pjmedia_format_id fmt_id,
enum PixelFormat *pixel_format)
{
unsigned i;
for (i=0; iid==fmt_id && t->pf != PIX_FMT_NONE) {
*pixel_format = t->pf;
return PJ_SUCCESS;
}
}
*pixel_format = PIX_FMT_NONE;
return PJ_ENOTFOUND;
}
pj_status_t PixelFormat_to_pjmedia_format_id(enum PixelFormat pf,
pjmedia_format_id *fmt_id)
{
unsigned i;
for (i=0; ipf == pf) {
if (fmt_id) *fmt_id = t->id;
return PJ_SUCCESS;
}
}
return PJ_ENOTFOUND;
}
pj_status_t pjmedia_format_id_to_CodecID(pjmedia_format_id fmt_id,
enum CodecID *codec_id)
{
unsigned i;
for (i=0; iid==fmt_id && t->codec_id != PIX_FMT_NONE) {
*codec_id = t->codec_id;
return PJ_SUCCESS;
}
}
*codec_id = PIX_FMT_NONE;
return PJ_ENOTFOUND;
}
pj_status_t CodecID_to_pjmedia_format_id(enum CodecID codec_id,
pjmedia_format_id *fmt_id)
{
unsigned i;
for (i=0; icodec_id == codec_id) {
if (fmt_id) *fmt_id = t->id;
return PJ_SUCCESS;
}
}
return PJ_ENOTFOUND;
}
#ifdef _MSC_VER
# pragma comment( lib, "avformat.lib")
# pragma comment( lib, "avutil.lib")
#endif
#endif /* #if PJMEDIA_HAS_LIBAVFORMAT && PJMEDIA_HAS_LIBAVUTIL */Help me fix this error !
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