Hi,
I'm grabbing frame from an ip camera with the rtsp protocol but I have an
issue, I can't release the stream. I mean, my camera is limited at 4 connexions
in a same time but if start 4 connections/disconnections one after the other, I
have the error "453 Not enough Bandwidth" on av_read_play(). So my question is,
how to stop properly the connection to avoid this issue. Here is my testing
code, I used wireshark to track messages and the "TEARDOWN" message is sent but
not used.
Code :
#include <QtCore/QCoreApplication>
#include <QDebug>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
}
bool grab()
{
// Declarations
AVPacket packet;
AVFrame *pFrame;
AVFrame *pFrameRGB = NULL;
int numBytes;
AVDictionary *optionsDict = NULL;
struct SwsContext *sws_ctx = NULL;
uint8_t *buffer = NULL;
AVFormatContext *pFormatCtx;
AVCodecContext *vCodecCtxp;
int videoStream;
int res;
// Init libav
av_register_all();
avformat_network_init();
pFormatCtx = avformat_alloc_context();
// Open stream
res = avformat_open_input(&pFormatCtx, "rtsp://192.168.1.28/h264", NULL, 0);
if(res!=0)
return false; // Couldn't open file
videoStream=-1;
if(avformat_find_stream_info(pFormatCtx,NULL) < 0){
return false;
}
for(int i=0; i<pFormatCtx->nb_streams; i++) {
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO &&
videoStream < 0) {
videoStream=i;
}
}
vCodecCtxp = pFormatCtx->streams[videoStream]->codec;
AVCodec *videoCodec;
videoCodec=avcodec_find_decoder(vCodecCtxp->codec_id);
res = avcodec_open2(vCodecCtxp, videoCodec, 0);
if(res != 0){
return false;
}
// Start playing
res = av_read_play(pFormatCtx);
if(res != 0){
return false;
}
// Stop playing and clean
res = av_read_pause(pFormatCtx);
if(res != 0){
return false;
}
pFormatCtx->streams[videoStream]->discard = AVDISCARD_ALL;
avcodec_close(vCodecCtxp);
avformat_close_input(&pFormatCtx);
avformat_network_deinit();
return true;
}
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
bool ok = true;
for(int i = 0; ok && i < 6; i++){
ok = grab();
if(ok)
qDebug() << i << "************************** - OK";
else
qDebug() << i << "************************** - PB";
}
if(ok)
qDebug() << "It works";
else
qDebug() << "TEST FAILED !";
return a.exec();
}
Results :
0 ************************** - OK
1 ************************** - OK
2 ************************** - PB
TEST FAILED !
Thank you for your help.
Jérémy
Ce courriel (de même que les fichiers joints) est strictement réservé à l'usage
de la personne ou de l'entité à qui il est adressé et peut contenir de
l'information privilégiée et confidentielle. Toute divulgation, distribution ou
copie de ce courriel est strictement prohibée. Si vous avez reçu ce courriel
par erreur, veuillez nous en aviser sur-le-champ, détruire toutes les copies et
le supprimer de votre système informatique.
This communication (including any files transmitted with it) is intended
solely for the person or entity to whom it is addressed, and may contain
confidential or privileged information. The disclosure, distribution or copying
of this message is strictly forbidden. Should you have received this
communication in error, kindly contact the sender promptly, destroy any copies
and delete this message from your computer system.
_______________________________________________
libav-api mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-api
