Recherche avancée
Médias (1)
-
The pirate bay depuis la Belgique
1er avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
Autres articles (61)
-
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 -
Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...) -
Les tâches Cron régulières de la ferme
1er décembre 2010, parLa gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
Le super Cron (gestion_mutu_super_cron)
Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)
Sur d’autres sites (9322)
-
mp4 video file generated using ffmpeg, works on desktop but doesn't work on android emulator
8 mai 2014, par NikeshI am generating a video that converts images into .mp4 video file. Every thing works fine. File is also generated as mp4 but the file doesn’t run on android device, says cannot play video.
Please find the attached sample code which convert single jpeg file into video (.mp4)
Please help me to resolve this issue. Thanks.
JNIEXPORT void JNICALL Java_roman10_ffmpegtst_VideoBrowser_videoExample(JNIEnv *pEnv, jobject pObj, char* imagefile,char* videoFile)
{
avcodec_init();
av_register_all();
avcodec_register_all();
AVCodecContext *pOCtx= NULL;
AVCodec *pOCodex = NULL;
LOGE(10,"Start videoExample");
pOCodex = avcodec_find_encoder(AV_CODEC_ID_MPEG1VIDEO);
if (!pOCodex) {
LOGE(10,"Cannot find encoder %s", pOCodex);
exit(1);
}
pOCtx= avcodec_alloc_context3(pOCodex);
uint8_t *outbuf;
int i, out_size;
pOCtx->bit_rate = 400000;
pOCtx->width = 640;
pOCtx->height = 480;
AVRational rational = {1,25};
pOCtx->time_base= rational;
pOCtx->gop_size = 10; /* emit one intra frame every ten frames */
pOCtx->max_b_frames=1;
pOCtx->pix_fmt = AV_PIX_FMT_YUV420P;
LOGE(10,"Start avcodec_open2");
int ret = avcodec_open2(pOCtx,pOCodex,NULL);
if(ret < 0)
{
return;
}
LOGE(10,"End avcodec_open2");
AVFormatContext *pIFormatCtx = NULL;
ret = avformat_open_input(&pIFormatCtx, imagefile, NULL, NULL);
if(ret < 0)
{
//Cant't open jpg file
return;
}
av_dump_format(pIFormatCtx, 0, imagefile, 0);
AVCodecContext *pICodecCtx; //output codec context
pICodecCtx = pIFormatCtx->streams[0]->codec;
/*pICodecCtx->width = 640;
pICodecCtx->height = 480;
pICodecCtx->pix_fmt = PIX_FMT_YUV420P;*/
AVCodec *pICodec = avcodec_find_decoder(pICodecCtx->codec_id); //output codec
// Open codec
ret = avcodec_open2(pICodecCtx, pICodec,NULL);
if(ret < 0)
{
//Can't find the decoder
return;
}
AVFrame *pIFrame = avcodec_alloc_frame();
if (!pIFrame)
{
//Can't alloc the input frame
return ;
}
int bufSize = avpicture_get_size(AV_PIX_FMT_YUVJ420P, pICodecCtx->width, pICodecCtx->height);
uint8_t *buffer = (uint8_t *) av_malloc(bufSize * sizeof(uint8_t));
avpicture_fill((AVPicture *) pIFrame, buffer, AV_PIX_FMT_YUVJ420P, pICodecCtx->width, pICodecCtx->height);
FILE *outputFile;
outputFile = fopen(videoFile, "w+");
if (!outputFile) {
LOGE(10,"could not open ");
exit(1);
}
int outbuf_size = 100000;
outbuf = (uint8_t*)malloc(outbuf_size);
AVPacket packet;
int frameFinished;
int framesNumber = 0;
while (av_read_frame(pIFormatCtx, &packet) >= 0)
{
if(packet.stream_index != 0)
continue;
ret = avcodec_decode_video2(pICodecCtx, pIFrame, &frameFinished, &packet);
if (ret > 0)
{
pIFrame->quality = 4;
for(i=0;i<25;i++) {
fflush(stdout);
/* encode the image */
out_size = avcodec_encode_video(pOCtx, outbuf, outbuf_size, pIFrame);
fwrite(outbuf, 1, out_size, outputFile);
}
}
}
/* get the delayed frames */
for(; out_size; i++) {
fflush(stdout);
out_size = avcodec_encode_video(pOCtx, outbuf, outbuf_size, NULL);
fwrite(outbuf, 1, out_size, outputFile);
}
/* add sequence end code to have a real mpeg file */
outbuf[0] = 0x00;
outbuf[1] = 0x00;
outbuf[2] = 0x01;
outbuf[3] = 0xb7;
fwrite(outbuf, 1, 4, outputFile);
fclose(outputFile);
free(outbuf);
avcodec_close(pOCtx);
av_free(pOCtx);
av_free(pIFrame);
} -
Android HLS plays first segment then only audio
1er décembre 2014, par Chris RecalisI’m having difficulty playing HLS on Android where only the audio is playing. The stream will play for the first video segment and then turn into an audio only stream. Here is a sample link https://clipter.com/c/aymels8/hls.m3u8
hls.m3u8
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-TARGETDURATION:9
#EXT-X-ALLOW-CACHE:YES
#EXTINF:8.5,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/2103cb31c3078eb5edd5c325108f6d6f.ts?1416176849
#EXTINF:7.33,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/1214ef63a031e3d3229893fdb60eea86.ts?1416176848
#EXTINF:8.5,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/99c47c49548521b0fff05119a5c63908.ts?1416176889
#EXTINF:8.43,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/143acefc2149f2572ddcc08abb705736.ts?1416176988
#EXTINF:4.43,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/11c92b5084971e0cf4768f958e97f936.ts?1416177431
#EXTINF:6.9,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/10ab810169fb684469f736a53f2cba3a.ts?1416177545
#EXTINF:8.57,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/88b037af27757e4805d7f1ed0496cbb8.ts?1416178434
#EXTINF:2.1,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/4a8cda13ea40228de4638dee9985b8b0.ts?1416178513
#EXTINF:8.47,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/e6fa0135987c86d323f1e994bcd2b429.ts?1416179772
#EXTINF:8.38,
https://d3ilpkc014v0xn.cloudfront.net/f5305de24/9a08aba19b45601c83854216bb07a6b6.ts?1416604373
#EXT-X-ENDLISToutput from ffprobe
ffprobe version 2.3.3 Copyright (c) 2007-2014 the FFmpeg developers
built on Aug 25 2014 19:47:15 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.3.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
libavutil 52. 92.100 / 52. 92.100
libavcodec 55. 69.100 / 55. 69.100
libavformat 55. 48.100 / 55. 48.100
libavdevice 55. 13.102 / 55. 13.102
libavfilter 4. 11.100 / 4. 11.100
libavresample 1. 3. 0 / 1. 3. 0
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mpegts, from '2103cb31c3078eb5edd5c325108f6d6f.ts?1416176849':
Duration: 00:00:08.53, start: 1.400000, bitrate: 1236 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, 480x480, 30 fps, 30 tbr, 90k tbn, 60 tbc
Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 44100 Hz, mono, fltp, 67 kb/s -
mp4 video file generated using ffmpeg, play on desktop but doesn't play on device
9 mai 2014, par NikeshI am generating a video that converts images into .mp4 video file. Every thing works fine. File is also generated as mp4 but the file doesn’t run on android device, says cannot play video.
Please find the attached sample code which convert single jpeg file into video (.mp4)
Please help me to resolve this issue. Thanks.
JNIEXPORT void JNICALL Java_roman10_ffmpegtst_VideoBrowser_videoExample(JNIEnv *pEnv, jobject pObj, char* imagefile,char* videoFile)
{
avcodec_init();
av_register_all();
avcodec_register_all();
AVCodecContext *pOCtx= NULL;
AVCodec *pOCodex = NULL;
LOGE(10,"Start videoExample");
pOCodex = avcodec_find_encoder(AV_CODEC_ID_MPEG1VIDEO);
if (!pOCodex) {
LOGE(10,"Cannot find encoder %s", pOCodex);
exit(1);
}
pOCtx= avcodec_alloc_context3(pOCodex);
uint8_t *outbuf;
int i, out_size;
pOCtx->bit_rate = 400000;
pOCtx->width = 640;
pOCtx->height = 480;
AVRational rational = {1,25};
pOCtx->time_base= rational;
pOCtx->gop_size = 10; /* emit one intra frame every ten frames */
pOCtx->max_b_frames=1;
pOCtx->pix_fmt = AV_PIX_FMT_YUV420P;
LOGE(10,"Start avcodec_open2");
int ret = avcodec_open2(pOCtx,pOCodex,NULL);
if(ret < 0)
{
return;
}
LOGE(10,"End avcodec_open2");
AVFormatContext *pIFormatCtx = NULL;
ret = avformat_open_input(&pIFormatCtx, imagefile, NULL, NULL);
if(ret < 0)
{
//Cant't open jpg file
return;
}
av_dump_format(pIFormatCtx, 0, imagefile, 0);
AVCodecContext *pICodecCtx; //output codec context
pICodecCtx = pIFormatCtx->streams[0]->codec;
/*pICodecCtx->width = 640;
pICodecCtx->height = 480;
pICodecCtx->pix_fmt = PIX_FMT_YUV420P;*/
AVCodec *pICodec = avcodec_find_decoder(pICodecCtx->codec_id); //output codec
// Open codec
ret = avcodec_open2(pICodecCtx, pICodec,NULL);
if(ret < 0)
{
//Can't find the decoder
return;
}
AVFrame *pIFrame = avcodec_alloc_frame();
if (!pIFrame)
{
//Can't alloc the input frame
return ;
}
int bufSize = avpicture_get_size(AV_PIX_FMT_YUVJ420P, pICodecCtx->width, pICodecCtx->height);
uint8_t *buffer = (uint8_t *) av_malloc(bufSize * sizeof(uint8_t));
avpicture_fill((AVPicture *) pIFrame, buffer, AV_PIX_FMT_YUVJ420P, pICodecCtx->width, pICodecCtx->height);
FILE *outputFile;
outputFile = fopen(videoFile, "w+");
if (!outputFile) {
LOGE(10,"could not open ");
exit(1);
}
int outbuf_size = 100000;
outbuf = (uint8_t*)malloc(outbuf_size);
AVPacket packet;
int frameFinished;
int framesNumber = 0;
while (av_read_frame(pIFormatCtx, &packet) >= 0)
{
if(packet.stream_index != 0)
continue;
ret = avcodec_decode_video2(pICodecCtx, pIFrame, &frameFinished, &packet);
if (ret > 0)
{
pIFrame->quality = 4;
for(i=0;i<25;i++) {
fflush(stdout);
/* encode the image */
out_size = avcodec_encode_video(pOCtx, outbuf, outbuf_size, pIFrame);
fwrite(outbuf, 1, out_size, outputFile);
}
}
}
/* get the delayed frames */
for(; out_size; i++) {
fflush(stdout);
out_size = avcodec_encode_video(pOCtx, outbuf, outbuf_size, NULL);
fwrite(outbuf, 1, out_size, outputFile);
}
/* add sequence end code to have a real mpeg file */
outbuf[0] = 0x00;
outbuf[1] = 0x00;
outbuf[2] = 0x01;
outbuf[3] = 0xb7;
fwrite(outbuf, 1, 4, outputFile);
fclose(outputFile);
free(outbuf);
avcodec_close(pOCtx);
av_free(pOCtx);
av_free(pIFrame);
}
Syndiquer tout le site
