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Autres articles (42)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 is the first MediaSPIP stable release.
Its official release date is June 21, 2013 and is announced here.
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Librairies et binaires spécifiques au traitement vidéo et sonore
31 janvier 2010, parLes logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
Binaires complémentaires et facultatifs flvtool2 : (...)
Sur d’autres sites (7664)
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Merge commit ’d316f9cefcd854071985c6f524a9a15348240264’
31 mars 2017, par James Almer -
libFLAC/md5.c : Massive refactoring of format_input_ function.
29 juin 2014, par Erik de Castro LopolibFLAC/md5.c : Massive refactoring of format_input_ function.
This refactoring is in preparation for fixing the cast-align warning when
compiling on ARM (and possibly others). Testing on stereo 16 bit files
suggests that the difference between the performance of this code and the
old code is negligible (tested only on amd64/linux). -
How do you specify container format in FFmpeg ?
15 avril 2021, par TheNeuronalCoderI am trying to encode mp4 video, but it doesn't open on my macbook because while it has the supported H264 codec, the container format is not MP4. So all I ask is how you would go about specifying the container format so I can generate video that is actually playable without using ffplay.


ffprobe version N-101948-g870bfe1 Copyright (c) 2007-2021 the FFmpeg developers
 built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
 configuration: --disable-asm --enable-shared --enable-libx264 --enable-gpl
 libavutil 56. 72.100 / 56. 72.100
 libavcodec 58.136.101 / 58.136.101
 libavformat 58. 78.100 / 58. 78.100
 libavdevice 58. 14.100 / 58. 14.100
 libavfilter 7.111.100 / 7.111.100
 libswscale 5. 10.100 / 5. 10.100
 libswresample 3. 10.100 / 3. 10.100
 libpostproc 55. 10.100 / 55. 10.100
Input #0, h264, from 'animation.mp4':
 Duration: N/A, bitrate: N/A
 Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080, 24.33 fps, 24 tbr, 1200k tbn, 48 tbc


void imagine::Camera::Record() {
 if (recording_ == true)
 throw std::runtime_error(
 "you must close your camera before starting another recording"
 );
 recording_ = true;

 output_file_ = std::fopen(output_.c_str(), "wb");
 if (!output_file_)
 throw std::runtime_error("failed to open file");

 AVCodec* codec = avcodec_find_encoder(AV_CODEC_ID_H264);
 if (!codec)
 throw std::runtime_error("failed to find codec");

 context_ = avcodec_alloc_context3(codec);
 if (!context_)
 throw std::runtime_error("failed to allocate video codec context");

 packet_ = av_packet_alloc();
 if (!packet_)
 throw std::runtime_error("failed to allocate video packet");

 py::tuple size = py::globals()["main_scene"].attr("size");
 context_->width = size[0].cast<int>();
 context_->height = size[1].cast<int>();
 context_->bit_rate = 0.4 * fps_ * context_->width * context_->height;
 context_->time_base = (AVRational){ 1, fps_ };
 context_->framerate = (AVRational){ fps_, 1 };
 context_->gop_size = 10;
 context_->max_b_frames = 1;
 context_->pix_fmt = AV_PIX_FMT_YUV420P;

 if (avcodec_open2(context_, codec, NULL) < 0)
 throw std::runtime_error("failed to open codec");

 frame_ = av_frame_alloc();
 if (!frame_)
 throw std::runtime_error("failed to allocate video frame");

 frame_->width = context_->width;
 frame_->height = context_->height;
 frame_->format = AV_PIX_FMT_YUV420P;

 if (av_frame_get_buffer(frame_, 0) < 0)
 throw std::runtime_error("failed to allocate the video frame data");
}
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