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Autres articles (51)
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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
Sur d’autres sites (5191)
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Video created using H263 codec and ffmpeg does not play on android device [closed]
21 mars 2013, par susheel tickooI have created a video using FFmpeg and H263 codec. But when I play the video on an Android device the player is unable to play it. I have used both the extensions .mp4 and .3gp.
void generate(JNIEnv *pEnv, jobject pObj,jobjectArray stringArray,int famerate,int width,int height,jstring videoFilename)
{
AVCodec *codec;
AVCodecContext *c= NULL;
//int framesnum=5;
int i,looper, out_size, size, x, y,encodecbuffsize,j;
__android_log_write(ANDROID_LOG_INFO, "record","************into generate************");
int imagecount= (*pEnv)->GetArrayLength(pEnv, stringArray);
__android_log_write(ANDROID_LOG_INFO, "record","************got magecount************");
int retval=-10;
FILE *f;
AVFrame *picture,*encoded_avframe;
uint8_t *encodedbuffer;
jbyte *raw_record;
char logdatadata[100];
int returnvalue = -1,numBytes =-1;
const char *gVideoFileName = (char *)(*pEnv)->GetStringUTFChars(pEnv, videoFilename, NULL);
__android_log_write(ANDROID_LOG_INFO, "record","************got video file name************");
/* find the mpeg1 video encoder */
codec = avcodec_find_encoder(CODEC_ID_H264);
if (!codec) {
__android_log_write(ANDROID_LOG_INFO, "record","codec not found");
exit(1);
}
c= avcodec_alloc_context();
/*c->bit_rate = 400000;
c->width = width;
c->height = height;
c->time_base= (AVRational){1,famerate};
c->gop_size = 12; // emit one intra frame every ten frames
c->max_b_frames=0;
c->pix_fmt = PIX_FMT_YUV420P;
c->codec_type = AVMEDIA_TYPE_VIDEO;
c->codec_id = CODEC_ID_H263;*/
c->bit_rate = 400000;
// resolution must be a multiple of two
c->width = 176;
c->height = 144;
c->pix_fmt = PIX_FMT_YUV420P;
c->qcompress = 0.0;
c->qblur = 0.0;
c->gop_size = 20; //or 1
c->sub_id = 1;
c->workaround_bugs = FF_BUG_AUTODETECT;
//pFFmpeg->c->time_base = (AVRational){1,25};
c->time_base.num = 1;
c->time_base.den = famerate;
c->max_b_frames = 0; //pas de B frame en H263
// c->opaque = opaque;
c->dct_algo = FF_DCT_AUTO;
c->idct_algo = FF_IDCT_AUTO;
//lc->rtp_mode = 0;
c->rtp_payload_size = 1000;
c->rtp_callback = 0; // ffmpeg_rtp_callback;
c->flags |= CODEC_FLAG_QSCALE;
c->mb_decision = FF_MB_DECISION_RD;
c->thread_count = 1;
#define DEFAULT_RATE (16 * 8 * 1024)
c->rc_min_rate = DEFAULT_RATE;
c->rc_max_rate = DEFAULT_RATE;
c->rc_buffer_size = DEFAULT_RATE * 64;
c->bit_rate = DEFAULT_RATE;
sprintf(logdatadata, "------width from c ---- = %d",width);
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
sprintf(logdatadata, "------height from c ---- = %d",height);
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
__android_log_write(ANDROID_LOG_INFO, "record","************Found codec and now opening it************");
/* open it */
retval = avcodec_open(c, codec);
if ( retval < 0)
{
sprintf(logdatadata, "------avcodec_open ---- retval = %d",retval);
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
__android_log_write(ANDROID_LOG_INFO, "record","could not open codec");
exit(1);
}
__android_log_write(ANDROID_LOG_INFO, "record","statement 5");
f = fopen(gVideoFileName, "ab");
if (!f) {
__android_log_write(ANDROID_LOG_INFO, "record","could not open video file");
exit(1);
}
__android_log_write(ANDROID_LOG_INFO, "record", "***************Allocating encodedbuffer*********\n");
encodecbuffsize = avpicture_get_size(PIX_FMT_RGB24, c->width, c->height);
sprintf(logdatadata, "encodecbuffsize = %d",encodecbuffsize);
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
encodedbuffer = malloc(encodecbuffsize);
jclass cls = (*pEnv)->FindClass(pEnv, "com/canvasm/mediclinic/VideoGenerator");
jmethodID mid = (*pEnv)->GetMethodID(pEnv, cls, "videoProgress", "(Ljava/lang/String;)Ljava/lang/String;");
jmethodID mid_delete = (*pEnv)->GetMethodID(pEnv, cls, "deleteTempFile", "(Ljava/lang/String;)Ljava/lang/String;");
if (mid == 0)
return;
__android_log_write(ANDROID_LOG_INFO, "native","got method id");
for(i=0;i<=imagecount;i++) {
jboolean isCp;
int progress = 0;
float temp;
jstring string;
if(i==imagecount)
string = (jstring) (*pEnv)->GetObjectArrayElement(pEnv, stringArray, imagecount-1);
else
string = (jstring) (*pEnv)->GetObjectArrayElement(pEnv, stringArray, i);
const char *rawString = (*pEnv)->GetStringUTFChars(pEnv, string, &isCp);
__android_log_write(ANDROID_LOG_INFO, "record",rawString);
picture = OpenImage(rawString,width,height);
//WriteJPEG(c,picture,i);
// encode video
memset(encodedbuffer,0,encodecbuffsize);
//do{
for(looper=0;looper<5;looper++)
{
memset(encodedbuffer,0,encodecbuffsize);
out_size = avcodec_encode_video(c, encodedbuffer, encodecbuffsize, picture);
sprintf(logdatadata, "avcodec_encode_video ----- out_size = %d \n",out_size );
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
if(out_size>0)
break;
}
__android_log_write(ANDROID_LOG_INFO, "record","*************Start looping for same image*******");
returnvalue = fwrite(encodedbuffer, 1, out_size, f);
sprintf(logdatadata, "fwrite ----- returnvalue = %d \n",returnvalue );
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
__android_log_write(ANDROID_LOG_INFO, "record","*************End looping for same image*******");
// publishing progress
progress = ((i*100)/(imagecount+1))+15;//+1 is for last frame duplicated entry
if(progress<20 )
progress =20;
if(progress>=95 )
progress =95;
sprintf(logdatadata, "%d",progress );
jstring jstrBuf = (*pEnv)->NewStringUTF(pEnv, logdatadata);
(*pEnv)->CallObjectMethod(pEnv, pObj, mid,jstrBuf);
if(i>0)
(*pEnv)->CallObjectMethod(pEnv, pObj, mid_delete,string);
}
/* get the delayed frames */
for(; out_size; i++) {
fflush(stdout);
out_size = avcodec_encode_video(c, encodedbuffer, encodecbuffsize, NULL);
fwrite(encodedbuffer, 20, out_size, f);
}
/* add sequence end code to have a real mpeg file */
encodedbuffer[0] = 0x00;
encodedbuffer[1] = 0x00;
encodedbuffer[2] = 0x01;
encodedbuffer[3] = 0xb7;
fwrite(encodedbuffer, 1, 4, f);
fclose(f);
free(encodedbuffer);
avcodec_close(c);
av_free(c);
__android_log_write(ANDROID_LOG_INFO, "record","Video created ");
// last updation of 100%
sprintf(logdatadata, "%d",100 );
jstring jstrBuf = (*pEnv)->NewStringUTF(pEnv, logdatadata);
(*pEnv)->CallObjectMethod(pEnv, pObj, mid,jstrBuf);
}
AVFrame* OpenImage(const char* imageFileName,int w,int h)
{
AVFrame *pFrame;
AVCodec *pCodec ;
AVFormatContext *pFormatCtx;
AVCodecContext *pCodecCtx;
uint8_t *buffer;
int frameFinished,framesNumber = 0,retval = -1,numBytes=0;
AVPacket packet;
char logdatadata[100];
//__android_log_write(ANDROID_LOG_INFO, "OpenImage",imageFileName);
if(av_open_input_file(&pFormatCtx, imageFileName, NULL, 0, NULL)!=0)
//if(avformat_open_input(&pFormatCtx,imageFileName,NULL,NULL)!=0)
{
__android_log_write(ANDROID_LOG_INFO, "record",
"Can't open image file ");
return NULL;
}
pCodecCtx = pFormatCtx->streams[0]->codec;
pCodecCtx->width = w;
pCodecCtx->height = h;
pCodecCtx->pix_fmt = PIX_FMT_YUV420P;
// Find the decoder for the video stream
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if (!pCodec)
{
__android_log_write(ANDROID_LOG_INFO, "record",
"Can't open image file ");
return NULL;
}
pFrame = avcodec_alloc_frame();
numBytes = avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
buffer = (uint8_t *) av_malloc(numBytes * sizeof(uint8_t));
sprintf(logdatadata, "numBytes = %d",numBytes);
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
retval = avpicture_fill((AVPicture *) pFrame, buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
// Open codec
if(avcodec_open(pCodecCtx, pCodec)<0)
{
__android_log_write(ANDROID_LOG_INFO, "record","Could not open codec");
return NULL;
}
if (!pFrame)
{
__android_log_write(ANDROID_LOG_INFO, "record","Can't allocate memory for AVFrame\n");
return NULL;
}
int readval = -5;
while (readval = av_read_frame(pFormatCtx, &packet) >= 0)
{
if(packet.stream_index != 0)
continue;
int ret = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
sprintf(logdatadata, "avcodec_decode_video2 ret = %d",ret);
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
if (ret > 0)
{
__android_log_write(ANDROID_LOG_INFO, "record","Frame is decoded\n");
pFrame->quality = 4;
av_free_packet(&packet);
av_close_input_file(pFormatCtx);
return pFrame;
}
else
{
__android_log_write(ANDROID_LOG_INFO, "record","error while decoding frame \n");
}
}
sprintf(logdatadata, "readval = %d",readval);
__android_log_write(ANDROID_LOG_INFO, "record",logdatadata);
}The
generatemethod takes a list of strings (path to images) and converts them to video and theOpenImagemethod is responsible for convertign a single image toAVFrame. -
Revision 7d8fc26c9c : vpxdec : support scaling output Adds an option, —scale, that will rescale any f
26 février 2013, par John KoleszarChanged Paths : Modify /examples.mk Modify /vpxdec.c vpxdec : support scaling output Adds an option, —scale, that will rescale any frames produced by the decoder that don't match the resolution of the first frame to that resolution. This is useful for playback of files that use spatial (...)
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Evolution #2919 : Boucles récursives et critère {si ...} des itérateurs
2 mars 2013, par marcimat -La résolution d’un des 2 points cités est assez délicate. 1) On ne peut pas mettre de critères sur une boucle récursive : effectivement puisque cette boucle appelle simplement la fonction de la boucle parente, ni plus ni moins, qui elle possède les critères. Cependant, les critères (qui sont mis (...)
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