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Médias (91)
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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
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Stereo master soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Audio
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Elephants Dream - Cover of the soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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#7 Ambience
16 octobre 2011, par
Mis à jour : Juin 2015
Langue : English
Type : Audio
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#6 Teaser Music
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#5 End Title
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
Autres articles (56)
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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 -
Pas question de marché, de cloud etc...
10 avril 2011Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
sur le web 2.0 et dans les entreprises qui en vivent.
Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...) -
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 (9937)
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where to save mpd file in raspberry pi so dash.js can access it remotely ?
11 mai 2016, par DjmThis is very high level question. I want to stream a live video from raspberry pi. I want to be able to watch live video in the browser remotely being streamed by the Raspberry pi.I want to use DASH stream protocol, and Dash.js as client to HTML5. I have looked through different tutorials but i am still puzzled about how this works.I understand that (assuming you have already prepared your videos with FFMPEG tool) from the client Dash.js
you have to make a call/request and pass a url to your mpd file. My question is where would you save the file in raspberry pi especially if the Dash client is in a different web app(i want to make the call remotely) ? -
ffmpeg : save separate frames as still gifs
7 novembre 2013, par Eugene MThe question is simple : I don't want ffmpeg to create an animated GIF from given video stream, I want separate frames, each in GIF format. But when I set output file to something like
frame%09d.gifffmpeg tends to create an animation (and stores it exactly asframe%09d.gif). The same for-f gifoption.Of course, I could save PNGs and use ImageMagic's
convertutility to transform them to GIFs, but I don't want any additional invocation overhead because I'm dealing with live streams and going to crunch large amounts of data.Here is what I do, nothing special :
ffmpeg -i http://brightcove03-f.akamaihd.net/valgbodmandag1378107345_1_300k@80362 -f gif -y frame_%09d.gif
ffmpeg version N-54643-g15cee5e Copyright (c) 2000-2013 the FFmpeg developers
built on Jul 11 2013 03:35:11 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu
tls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --ena
ble-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger -
-enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-lib
vpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 39.100 / 52. 39.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.101 / 55. 12.101
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 80.100 / 3. 80.100
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
[flv @ 00000000002cb700] Stream discovered after head already parsed
Input #0, flv, from 'http://brightcove03-f.akamaihd.net/valgbodmandag1378107345_1_300k@80362':
Metadata:
encoder : Lavf54.6.100
Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 480x270 [SAR 1:1 DAR 16:9], 25 tbr, 1k tbn, 50 tbc
Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s
Stream #0:2: Data: none
[swscaler @ 0000000004d051e0] No accelerated colorspace conversion found from yuv420p to bgr8.
Output #0, gif, to 'frame_%09d.gif':
Metadata:
encoder : Lavf55.12.101
Stream #0:0: Video: gif, bgr8, 480x270 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 100 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> gif)
Press [q] to stop, [?] for help
frame= 141 fps=130 q=-1.0 Lsize= 4960kB time=00:00:05.68 bitrate=7153.1kbits/s
video:5100kB audio:0kB subtitle:0 global headers:0kB muxing overhead -2.743247%After all I get a file named "frame_%03d.gif", but instead I want to have several files "frame_001.gif", "frame_002.gif", etc.
Any ideas ?
Thanks in advance. -
How to save the video stream as h264
16 mars 2023, par aaadddzxcI pull the stream through ffmpeg, and then save the video of this stream as an h264 file, but the saved file cannot be played. Why is this ?


The h264 saved by the following code cannot be played,i dont know why...


i try to vlc play, but cant play the h264 file.


can be save to h264 without avformat_alloc_output_context2 function ?


#include <thread>
#include <iostream>
#include <fstream>
extern "C"
{
#include <libavcodec></libavcodec>avcodec.h>
#include <libavcodec></libavcodec>bsf.h>
#include <libavformat></libavformat>avformat.h>
}

#pragma comment(lib,"avcodec.lib")
#pragma comment(lib,"avdevice.lib")
#pragma comment(lib,"avfilter.lib")
#pragma comment(lib,"avformat.lib")
#pragma comment(lib,"avutil.lib")
#pragma comment(lib,"swresample.lib")
#pragma comment(lib,"swscale.lib")

int mp4toannexb(AVBSFContext* bsf_ctx, AVPacket* pkt, std::ofstream& out)
{
 int ret;

 ret = av_bsf_send_packet(bsf_ctx, pkt);
 if (ret < 0) {
 std::cout << "bsf send packet failed, errno:" << ret << std::endl;
 return -1;
 }

 for (;;) {
 ret = av_bsf_receive_packet(bsf_ctx, pkt);
 if (AVERROR_EOF == ret || AVERROR(EAGAIN) == ret) {
 return 0;
 }
 if (ret < 0) {
 std::cout << "Could not receive packet, errno:" << ret << std::endl;
 return -1;
 }
 out.write((const char*)pkt->data, pkt->size);
 }
 return 0;
}


int main()
{
 AVOutputFormat* ofmt = NULL;
 AVFormatContext* ifmt_ctx = NULL;
 AVBSFContext* bsf_ctx = NULL;
 AVPacket* pkt = NULL;
 const char* in_filename = "http://192.168.1.12:8088/live/123.flv";
 int ret = -1;
 int video_index = -1;
 std::ofstream outh264("D:\\ConsoleApplication1\\Debug\\out.h264", std::ios::binary | std::ios::trunc);

 avformat_network_init();

 if ((ifmt_ctx = avformat_alloc_context()) == NULL) {
 std::cout << "avformat_alloc_context failed." << std::endl;
 exit(1);
 }

 if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) {
 std::cout << "Could not open input file." << std::endl;
 exit(1);
 }

 if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) {
 std::cout << "Failed to retrieve input stream information" << std::endl;
 return -1;
 }

 if (!(pkt = av_packet_alloc())) {
 std::cout << "Could not allocate packet" << std::endl;
 return -1;
 }

 video_index = av_find_best_stream(ifmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
 if (video_index < 0) {
 std::cout << "Could not find stream " << std::string(av_get_media_type_string(AVMEDIA_TYPE_VIDEO)) << std::endl;
 return -1;
 }

 av_dump_format(ifmt_ctx, 0, in_filename, 0);

 const AVBitStreamFilter* filter = av_bsf_get_by_name("h264_mp4toannexb");
 if (NULL == filter) {
 std::cout << "Could not create filter" << std::endl;
 return -1;
 }

 ret = av_bsf_alloc(filter, &bsf_ctx);
 if (ret < 0) {
 printf("Could not alloc bitstream filter \n");
 return -1;
 }

 // avcodec_parameters_from_context
 ret = avcodec_parameters_copy(bsf_ctx->par_in, ifmt_ctx->streams[video_index]->codecpar);
 if (ret < 0) {
 printf("Parameter copy filed, errno: %d \n", ret);
 return -1;
 }

 ret = av_bsf_init(bsf_ctx);
 if (ret < 0) {
 printf("BSF init failed, errno: %d \n", ret);
 return -1;
 }

 while (av_read_frame(ifmt_ctx, pkt) >= 0) {
 if (pkt->stream_index == video_index)
 {
 mp4toannexb(bsf_ctx, pkt, outh264);
 }
 av_packet_unref(pkt);
 }
 outh264.close();
 avformat_close_input(&ifmt_ctx);
 av_packet_free(&pkt);
 av_bsf_free(&bsf_ctx);

 return 0;
}
</fstream></iostream></thread>

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