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Autres articles (79)
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Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...) -
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" (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (10258)
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qsvdec : Pass the correct profile to libmfx
26 octobre 2016, par Mark Thompsonqsvdec : Pass the correct profile to libmfx
This was correct for H.26[45], because libmfx uses the same values
derived from profile_idc and the constraint_set flags, but it is
wrong for other codecs.Also avoid passing FF_LEVEL_UNKNOWN (-99) as the level, as this is
certainly invalid. -
ffmpeg android convert yuv420 to rgba can't get a correct video
13 octobre 2016, par ToolBarI want convert the video (yuv420) to
rgba
, but I got the following gray video
after conversion process :My code :
if (width < 1 || height < 1 || pYUV == NULL || pBGR24 == NULL)
return false;
//int srcNumBytes,dstNumBytes;
//uint8_t *pSrc,*pDst;
AVPicture pFrameYUV,pFrameBGR;
//pFrameYUV = avpicture_alloc();
//srcNumBytes = avpicture_get_size(PIX_FMT_YUV420P,width,height);
//pSrc = (uint8_t *)malloc(sizeof(uint8_t) * srcNumBytes);
avpicture_fill(&pFrameYUV,pYUV,AV_PIX_FMT_YUV420P,width,height);
//U,V change
uint8_t * ptmp=pFrameYUV.data[1];
pFrameYUV.data[1]=pFrameYUV.data[2];
pFrameYUV.data [2]=ptmp;
//pFrameBGR = avcodec_alloc_frame();
//dstNumBytes = avpicture_get_size(PIX_FMT_BGR24,width,height);
//pDst = (uint8_t *)malloc(sizeof(uint8_t) * dstNumBytes);
avpicture_fill(&pFrameBGR,pBGR24,AV_PIX_FMT_BGR24,width,height);
struct SwsContext* imgCtx = NULL;
imgCtx = sws_getContext(width,height,AV_PIX_FMT_YUV420P,width,height,AV_PIX_FMT_BGR24,SWS_BILINEAR,0,0,0);
if (imgCtx != NULL){
sws_scale(imgCtx,pFrameYUV.data,pFrameYUV.linesize,0,height,pFrameBGR.data,pFrameBGR.linesize);
if(imgCtx){
sws_freeContext(imgCtx);
imgCtx = NULL;
}
return true;
}
else{
sws_freeContext(imgCtx);
imgCtx = NULL;
return false;
}Can you help me. I have tried some other methods, but didn’t work.
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Colors are not correct for FFMPEG videos
23 août 2016, par Mohammad Abu MusaI am writing a screen recorder, I managed to record the videos and export them as
webm
but I have a color and timing issue(which I am working on).For coloring the video frames I get are formatted with
FORMAT_I420
which I transfer them to YUV sources and encode them as the following codevoid EncoderInstance::OnGetFrame(int32_t result, pp::VideoFrame frame) {
if (result != PP_OK)
return;
//const uint8_t* data = static_cast<const>(frame.GetDataBuffer());
unsigned char* data = static_cast<unsigned>(frame.GetDataBuffer());
pp::Size size;
frame.GetSize(&size);
uint32_t buffersize = frame.GetDataBufferSize();
//frame.GetFormat() == PP_VIDEOFRAME_FORMAT_BGRA);
//Logger::Log("Format is :%d", frame.GetFormat());
//PP_VIDEOFRAME_FORMAT_I420
Logger::Log("stream received is: %02X", data);
if (is_recording_) {
vpx_codec_iter_t iter = NULL;
const vpx_codec_cx_pkt_t *pkt;
int iSizeY = out_width * out_height;
int iSizeUV = (out_width * out_height)/4;
unsigned char* pY = data;
unsigned char* pU = data + iSizeY; // there are width * height Y components
unsigned char* pV = data + iSizeUV; // skip the U components
Logger::Log("pY: %02X", pY);
Logger::Log("pU: %02X", pU);
Logger::Log("pV: %02X", pV);
// copy the pixels into our "raw input" container.
int bytes_filled = avpicture_fill(&pic_raw, NULL, AV_PIX_FMT_YUV420P, out_width, out_height);
pic_raw.data[0] = pY;
pic_raw.data[1] = pU;
pic_raw.data[2] = pU;
Logger::Log("bytes filled: %d", bytes_filled);
if(!bytes_filled) {
Logger::Log("Cannot fill the raw input buffer");
return;
}
// convert to i420 for vp8
int h = sws_scale(sws, pic_raw.data, pic_raw.linesize, 0, out_height, raw.planes, raw.stride);
if(h != out_height) {
Logger::Log("scale failed: %d", h);
return;
}
Logger::Log("Picture Raw data is: %d", pic_raw.data);
if(vpx_codec_encode(&codec, &raw, frame_cnt, 1, flags, VPX_DL_REALTIME))
die_codec(&codec, "Failed to encode frame");
while( (pkt = vpx_codec_get_cx_data(&codec, &iter)) ) {
switch(pkt->kind) {
case VPX_CODEC_CX_FRAME_PKT:
Logger::Log("Compressed buffer is %02X:",pkt->data.frame.buf);
Logger::Log("Compressed buffer size %02X:",pkt->data.frame.sz);
glb_app_thread.message_loop().PostWork(callback_factory_.NewCallback(&EncoderInstance::write_ivf_frame_header, pkt));
glb_app_thread.message_loop().PostWork(callback_factory_.NewCallback(&EncoderInstance::WriteFile, pkt));
break;
default:break;
}
}
frame_cnt++;
}
video_track_.RecycleFrame(frame);
if (need_config_) {
ConfigureTrack();
need_config_ = false;
} else {
video_track_.GetFrame(
callback_factory_.NewCallbackWithOutput(
&EncoderInstance::OnGetFrame));
}
}
</unsigned></const>Here is a screenshot of an image I got from the video generated