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Autres articles (50)
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Keeping control of your media in your hands
13 avril 2011, parThe vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...) -
Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
You may also (...) -
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" (...)
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Streaming client over TCP and RTSP through Wi-Fi or LAN in Android
6 janvier 2015, par GowthamI am struggling to develop streaming client for DVR camera’s, I tried with VLC Media player through RTSP protocol I got the solution (used Wi-Fi standard model like, Netgear etc.,), but the same code is not supporting for other Wi-Fi Modem’s, now am working with FFMPEG framework to implement the streaming client in android using JNI API. Not getting any proper idea to implement JNI api
Network Camera working with IP Cam Viewer App
code below,
/*****************************************************/
/* functional call */
/*****************************************************/
jboolean Java_FFmpeg_allocateBuffer( JNIEnv* env, jobject thiz )
{
// Allocate an AVFrame structure
pFrameRGB=avcodec_alloc_frame();
if(pFrameRGB==NULL)
return 0;
sprintf(debugMsg, "%d %d", screenWidth, screenHeight);
INFO(debugMsg);
// Determine required buffer size and allocate buffer
numBytes=avpicture_get_size(dstFmt, screenWidth, screenHeight);
/*
numBytes=avpicture_get_size(dstFmt, pCodecCtx->width,
pCodecCtx->height);
*/
buffer=(uint8_t *)av_malloc(numBytes * sizeof(uint8_t));
// Assign appropriate parts of buffer to image planes in pFrameRGB
// Note that pFrameRGB is an AVFrame, but AVFrame is a superset
// of AVPicture
avpicture_fill((AVPicture *)pFrameRGB, buffer, dstFmt, screenWidth, screenHeight);
return 1;
}
/* for each decoded frame */
jbyteArray Java_FFmpeg_getNextDecodedFrame( JNIEnv* env, jobject thiz )
{
av_free_packet(&packet);
while(av_read_frame(pFormatCtx, &packet)>=0) {
if(packet.stream_index==videoStream) {
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
if(frameFinished) {
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, screenWidth, screenHeight, dstFmt, SWS_BICUBIC, NULL, NULL, NULL);
/*
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, dstFmt, SWS_BICUBIC, NULL, NULL, NULL);
*/
sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize,
0, pCodecCtx->height, pFrameRGB->data, pFrameRGB->linesize);
++frameCount;
/* uint8_t == unsigned 8 bits == jboolean */
jbyteArray nativePixels = (*env)->NewByteArray(env, numBytes);
(*env)->SetByteArrayRegion(env, nativePixels, 0, numBytes, buffer);
return nativePixels;
}
}
av_free_packet(&packet);
}
return NULL;
}
/*****************************************************/
/* / functional call */
/*****************************************************/
jstring
Java_FFmpeg_play( JNIEnv* env, jobject thiz, jstring jfilePath )
{
INFO("--- Play");
char* filePath = (char *)(*env)->GetStringUTFChars(env, jfilePath, NULL);
RE(filePath);
/*****************************************************/
AVFormatContext *pFormatCtx;
int i, videoStream;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame;
AVPacket packet;
int frameFinished;
float aspect_ratio;
struct SwsContext *img_convert_ctx;
INFO(filePath);
/* FFmpeg */
av_register_all();
if(av_open_input_file(&pFormatCtx, filePath, NULL, 0, NULL)!=0)
RE("failed av_open_input_file ");
if(av_find_stream_info(pFormatCtx)<0)
RE("failed av_find_stream_info");
videoStream=-1;
for(i=0; inb_streams; i++)
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
videoStream=i;
break;
}
if(videoStream==-1)
RE("failed videostream == -1");
pCodecCtx=pFormatCtx->streams[videoStream]->codec;
pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
if(pCodec==NULL) {
RE("Unsupported codec!");
}
if(avcodec_open(pCodecCtx, pCodec)<0)
RE("failed codec_open");
pFrame=avcodec_alloc_frame();
/* /FFmpeg */
INFO("codec name:");
INFO(pCodec->name);
INFO("Getting into stream decode:");
/* video stream */
i=0;
while(av_read_frame(pFormatCtx, &packet)>=0) {
if(packet.stream_index==videoStream) {
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
if(frameFinished) {
++i;
INFO("frame finished");
AVPicture pict;
/*
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height,
pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height,
PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize,
0, pCodecCtx->height, pict.data, pict.linesize);
*/
}
}
av_free_packet(&packet);
}
/* /video stream */
av_free(pFrame);
avcodec_close(pCodecCtx);
av_close_input_file(pFormatCtx);
RE("end of main");
}I can’t able to get the frames from Network camera
And give some idea to implement the live stream client for DVR camera in Android