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Encodage et transformation en formats lisibles sur Internet
10 avril 2011MediaSPIP transforme et ré-encode les documents mis en ligne afin de les rendre lisibles sur Internet et automatiquement utilisables sans intervention du créateur de contenu.
Les vidéos sont automatiquement encodées dans les formats supportés par HTML5 : MP4, Ogv et WebM. La version "MP4" est également utilisée pour le lecteur flash de secours nécessaire aux anciens navigateurs.
Les documents audios sont également ré-encodés dans les deux formats utilisables par HTML5 :MP3 et Ogg. La version "MP3" (...) -
Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
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
Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)
Sur d’autres sites (11170)
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av_video_decode2 RETURNS THE VALUE -1094995529 in the threaded function
24 mai 2014, par WhoamiI am developing rtsp streaming player, and followed the below approach.
1) Read packet, decode, display -> works perfectly.
while (1) {
if ( av_read_frame(pFormatCtx, &packet) >= 0) {
if (packet.stream_index == videoStream) {
retDecoder = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
if ( retDecoder <= 0)
LOGD (" Unable to Decode...retval %d ", retDecoder);
if (frameFinished) {
}
}
av_free_packet (&packet);
}
}Whereas,
I introduced two threads, one is reading and pushing into the queue and the second one is reading from the queue.
My problem is while reading the same packet, and decode, i m unable to decode, the return value of the
av_video_decode2is-1094995529.Below is the short description of code. Kindly help to solve this issue ?.
AVPacketList *firstNode=NULL, *lastNode=NULL;
int pushPacket (AVPacket * pkt)
{
AVPacketList *newNode = av_malloc(sizeof(AVPacketList));
newNode->pkt = *pkt;
newNode->next = NULL;
SDL_LockMutex (rwMutex);
if (lastNode != NULL ) {
lastNode->next = newNode;
lastNode = newNode;
} else {
firstNode = lastNode = newNode;
}
SDL_UnlockMutex (rwMutex);
}
int pullPacket ()
{
AVPacketList *tempNode;
AVPacket *pkt;
int res=0;
SDL_LockMutex (rwMutex);
if ( firstNode != NULL ) {
tempNode = firstNode;
*pkt = tempNode->pkt;
res = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, pkt); // HERE IS THE PROBLEM.
if (frameFinished) {
LOGD (" fRAME DECODED.. %d \n", counter++);
}
if (firstNode->next != NULL) {
firstNode = firstNode->next;
}
else {
firstNode = NULL;
lastNode = NULL;
}
av_free (tempNode);
}
}In Thread 1 :
int PacketReader (void *ptr)
{
AVPacket pkt1, *rpacket;
rpacket = &pkt1;
while (globalQuit != 0) {
if ( av_read_frame(pFormatCtx, rpacket) >= 0) {
if (packet.stream_index == videoStream) {
pushPacket (rpacket);
}
av_free_packet(rpacket);
}
}
}In thread 2 :
while (1) {
pullPacket ();
} -
avcodec_decode_video2 RETURNS THE VALUE -1094995529 in the threaded function
2 février 2016, par WhoamiI am developing rtsp streaming player, and followed the below approach.
1) Read packet, decode, display -> works perfectly.
while (1) {
if ( av_read_frame(pFormatCtx, &packet) >= 0) {
if (packet.stream_index == videoStream) {
retDecoder = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
if ( retDecoder <= 0)
LOGD (" Unable to Decode...retval %d ", retDecoder);
if (frameFinished) {
}
}
av_free_packet (&packet);
}
}Whereas,
I introduced two threads, one is reading and pushing into the queue and the second one is reading from the queue.
My problem is while reading the same packet, and decode, i m unable to decode, the return value of the
av_video_decode2is-1094995529.Below is the short description of code. Kindly help to solve this issue ?.
AVPacketList *firstNode=NULL, *lastNode=NULL;
int pushPacket (AVPacket * pkt)
{
AVPacketList *newNode = av_malloc(sizeof(AVPacketList));
newNode->pkt = *pkt;
newNode->next = NULL;
SDL_LockMutex (rwMutex);
if (lastNode != NULL ) {
lastNode->next = newNode;
lastNode = newNode;
} else {
firstNode = lastNode = newNode;
}
SDL_UnlockMutex (rwMutex);
}
int pullPacket ()
{
AVPacketList *tempNode;
AVPacket *pkt;
int res=0;
SDL_LockMutex (rwMutex);
if ( firstNode != NULL ) {
tempNode = firstNode;
*pkt = tempNode->pkt;
res = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, pkt); // HERE IS THE PROBLEM.
if (frameFinished) {
LOGD (" fRAME DECODED.. %d \n", counter++);
}
if (firstNode->next != NULL) {
firstNode = firstNode->next;
}
else {
firstNode = NULL;
lastNode = NULL;
}
av_free (tempNode);
}
}In Thread 1 :
int PacketReader (void *ptr)
{
AVPacket pkt1, *rpacket;
rpacket = &pkt1;
while (globalQuit != 0) {
if ( av_read_frame(pFormatCtx, rpacket) >= 0) {
if (packet.stream_index == videoStream) {
pushPacket (rpacket);
}
av_free_packet(rpacket);
}
}
}In thread 2 :
while (1) {
pullPacket ();
} -
av_read_frame() in ffmpeg returns -5 while receiving UDP data [closed]
26 février 2024, par zttangI'm working on an app which is using ffmpeg lib. There is a living source keep sending TS stream thru udp. Then I allocated a thread use ffmpeg receive the TS packets. the code for this thread is like :


void* av_source_thread(void *data) {
 char udp_url[50];
 snprintf(udp_url, sizeof(udp_url), "udp://127.0.0.1:12345");
 AVDictionary* options = NULL;
 av_dict_set(&options, "timeout", "500000", 0); // timeout=0.5s
 av_dict_set(&options, "overrun_nonfatal", "1", 0);
 av_dict_set(&options, "fifo_size", "278876", 0); //50MB

 AVFormatContext *ffmpeg_source = avformat_alloc_context();
 while (running) {
 if (avformat_open_input(&ffmpeg_source, udp_url, NULL, &options) != 0) {
 continue;
 } else {
 break;
 }
 }
 // Some code fill codec type and alloc context here

 av_format_inject_global_side_data(ffmpeg_source);
 AVPacket *packet = av_packet_alloc();
 while (running) {
 ret = av_read_frame(ffmpeg_source, packet);
 if (ret < 0) {
 char errbuf[AV_ERROR_MAX_STRING_SIZE];
 av_strerror(ret, errbuf, AV_ERROR_MAX_STRING_SIZE);
 usleep(10000);
 log("av_read_frame failed, Exit, %s, %d", errbuf, ret);
 continue;
 }
 putPkt2Q(packet); 
 }
 av_packet_free(&packet);
 avformat_close_input(&ffmpeg_source);
 av_dict_free(&options);
 return nullptr;
}


Then the packets will be sent to Q and other thread will process them. but when I run the program, the av_read_frame will return -5(I/O error) from time to time. and once it returned -5, it can not recover unless I restart this thread.


since this is a real time source, so lost some frames are acceptable, I just want to know how to avoid this kind of issue or how to recover without restart the whole thread. I tried to increase the fifo_size in options, but it does not work.


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