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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (6)
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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 (...) -
Keeping control of your media in your hands
13 avril 2011, parThe vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...) -
Selection of projects using MediaSPIP
2 mai 2011, parThe examples below are representative elements of MediaSPIP specific uses for specific projects.
MediaSPIP farm @ Infini
The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)
Sur d’autres sites (2382)
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ffmpeg how to add mkv to formats
30 décembre 2015, par Mahmoud Saadhello after installing ffmpeg in my linux server with centos 6 after searching google i run ffmpeg -formats so i need to add mkv i know i will need to recompile ffmpeg but i do not know how to do it
thank youFile formats:
D. = Demuxing supported
.E = Muxing supported
--
E 3g2 3GP2 format
E 3gp 3GP format
D 4xm 4X Technologies format
D IFF IFF format
D ISS Funcom ISS format
D MTV MTV format
DE RoQ raw id RoQ format
D aac raw ADTS AAC
DE ac3 raw AC-3
E adts ADTS AAC
D aea MD STUDIO audio
DE aiff Audio IFF
DE alaw PCM A-law format
DE alsa ALSA audio output
DE amr 3GPP AMR file format
D anm Deluxe Paint Animation
D apc CRYO APC format
D ape Monkey's Audio
DE asf ASF format
E asf_stream ASF format
DE ass SSA/ASS format
DE au SUN AU format
DE avi AVI format
E avm2 Flash 9 (AVM2) format
D avs AVS format
D bethsoftvid Bethesda Softworks VID format
D bfi Brute Force & Ignorance
D bink Bink
D c93 Interplay C93
D caf Apple Core Audio Format
D cavsvideo raw Chinese AVS video
D cdg CD Graphics Format
E crc CRC testing format
DE daud D-Cinema audio format
DE dirac raw Dirac
DE dnxhd raw DNxHD (SMPTE VC-3)
D dsicin Delphine Software International CIN format
DE dts raw DTS
DE dv DV video format
D dv1394 DV1394 A/V grab
E dvd MPEG-2 PS format (DVD VOB)
D dxa DXA
D ea Electronic Arts Multimedia Format
D ea_cdata Electronic Arts cdata
DE eac3 raw E-AC-3
DE f32be PCM 32 bit floating-point big-endian format
DE f32le PCM 32 bit floating-point little-endian format
DE f64be PCM 64 bit floating-point big-endian format
DE f64le PCM 64 bit floating-point little-endian format
DE ffm FFM (FFserver live feed) format
D film_cpk Sega FILM/CPK format
DE filmstrip Adobe Filmstrip
DE flac raw FLAC
D flic FLI/FLC/FLX animation format
DE flv FLV format
E framecrc framecrc testing format
E gif GIF Animation
D gsm raw GSM
DE gxf GXF format
DE h261 raw H.261
DE h263 raw H.263
DE h264 raw H.264 video format
D idcin id Cinematic format
DE image2 image2 sequence
DE image2pipe piped image2 sequence
D ingenient raw Ingenient MJPEG
D ipmovie Interplay MVE format
E ipod iPod H.264 MP4 format
D iv8 A format generated by IndigoVision 8000 video server
D libdc1394 dc1394 v.2 A/V grab
D lmlm4 lmlm4 raw format
DE m4v raw MPEG-4 video format
DE matroska Matroska file format
DE mjpeg raw MJPEG video
DE mlp raw MLP
D mm American Laser Games MM format
DE mmf Yamaha SMAF
E mov MOV format
D mov,mp4,m4a,3gp,3g2,mj2 QuickTime/MPEG-4/Motion JPEG 2000 format
E mp2 MPEG audio layer 2
DE mp3 MPEG audio layer 3
E mp4 MP4 format
D mpc Musepack
D mpc8 Musepack SV8
DE mpeg MPEG-1 System format
E mpeg1video raw MPEG-1 video
E mpeg2video raw MPEG-2 video
DE mpegts MPEG-2 transport stream format
D mpegtsraw MPEG-2 raw transport stream format
D mpegvideo raw MPEG video
E mpjpeg MIME multipart JPEG format
D msnwctcp MSN TCP Webcam stream
DE mulaw PCM mu-law format
D mvi Motion Pixels MVI format
DE mxf Material eXchange Format
E mxf_d10 Material eXchange Format, D-10 Mapping
D nc NC camera feed format
D nsv Nullsoft Streaming Video
E null raw null video format
DE nut NUT format
D nuv NuppelVideo format
DE ogg Ogg
D oma Sony OpenMG audio
DE oss Open Sound System playback
E psp PSP MP4 format
D psxstr Sony Playstation STR format
D pva TechnoTrend PVA file and stream format
D qcp QCP format
D r3d REDCODE R3D format
DE rawvideo raw video format
E rcv VC-1 test bitstream
D rl2 RL2 format
DE rm RealMedia format
D rpl RPL/ARMovie format
E rtp RTP output format
DE rtsp RTSP output format
DE s16be PCM signed 16 bit big-endian format
DE s16le PCM signed 16 bit little-endian format
DE s24be PCM signed 24 bit big-endian format
DE s24le PCM signed 24 bit little-endian format
DE s32be PCM signed 32 bit big-endian format
DE s32le PCM signed 32 bit little-endian format
DE s8 PCM signed 8 bit format
D sdp SDP
D shn raw Shorten
D siff Beam Software SIFF
D smk Smacker video
D sol Sierra SOL format
DE sox SoX native format
E spdif IEC958 - S/PDIF (IEC-61937)
E svcd MPEG-2 PS format (VOB)
DE swf Flash format
D thp THP
D tiertexseq Tiertex Limited SEQ format
D tmv 8088flex TMV
DE truehd raw TrueHD
D tta True Audio
D txd Renderware TeXture Dictionary
DE u16be PCM unsigned 16 bit big-endian format
DE u16le PCM unsigned 16 bit little-endian format
DE u24be PCM unsigned 24 bit big-endian format
DE u24le PCM unsigned 24 bit little-endian format
DE u32be PCM unsigned 32 bit big-endian format
DE u32le PCM unsigned 32 bit little-endian format
DE u8 PCM unsigned 8 bit format
D vc1 raw VC-1
D vc1test VC-1 test bitstream format
E vcd MPEG-1 System format (VCD)
D video4linux Video4Linux device grab
D video4linux2 Video4Linux2 device grab
D vmd Sierra VMD format
E vob MPEG-2 PS format (VOB)
DE voc Creative Voice file format
D vqf Nippon Telegraph and Telephone Corporation (NTT) TwinVQ
D w64 Sony Wave64 format
DE wav WAV format
D wc3movie Wing Commander III movie format
E webm WebM file format
D wsaud Westwood Studios audio format
D wsvqa Westwood Studios VQA format
D wv WavPack
D x11grab X11grab
D xa Maxis XA File Format
D yop Psygnosis YOP Format
DE yuv4mpegpipe YUV4MPEG pipe format -
Powerful Video Analytics and Audio Analytics for Piwik
10 novembre 2016, par InnoCraft — Plugins, Press ReleasesOver the years, one of the most frequently requested feature by users was to be able to measure how videos and audios are watched and engaged with on your website. We are finally able to announce that it is here ! We are very excited to launch Media Analytics, which will help you understand and grow your audience.
This article is a showcase of the new powerful video and audio analytics product built for Piwik.
Why media analytics ?
We all love media content such as videos as they can make our experiences on websites and apps so much more interesting. A growing number of websites now utilize media files in one form or another : a video presentation of a product or service, a video tutorial teaching you how to do something or interviews with key speakers. Also many creators and distributors are publishing audio files such as podcasts or music songs, and even broadcasting live video events such as music concerts or an entire conference online.
Whenever you publish videos or audio media on your websites or applications, Media Analytics provides you with clear insights on how your audience interacts with your content. It helps you see what content works and why – so you can better understand and further grow your business !
Valuable insights in Real time
See where your audience comes from.
How will Media Analytics help me grow ?
- Better understand your audience : who are the users playing videos and for how long, how often, and where have they dropped off.
- Gain quick insights into how interaction with your media changes over time with easy to use graphs and report overviews.
- Get closer to your users by seeing every action of your visitors before and after they utilized your media.
- View valuable insights in Real time : ‘most popular content right now’, your real time audience map, and more.
- See where your audience comes from. Drill down right from continents to specifics such as cities.
- Share and export media analytics reports with your colleagues by creating custom email reports.
- Video and audio players are supported either automatically (for Youtube, Vimeo, HTML5…) or via a simple custom player integration.
- No data limit and 100% privacy and data ownership.
Best of all, it is easy to use and understand, and integrates perfectly with Piwik. Media Analytics complements other reports to give you a 360 degree view of how your users engage with your content.
Learn more on the official website : www.media-analytics.net
How do I get Media Analytics ?
All premium plugins come with our 14 day money back guarantee and 1-click installation & updates. Customers get all product updates for free.
Media Analytics is available for purchase and download on the Marketplace.
If you are not using Piwik yet, you can also signup for a free trial of Piwik Cloud (including Media Analytics !).
Have a question about this product ? Get in touch.
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What's wrong with my use of timestamps/timebases for frame seeking/reading using libav (ffmpeg) ?
17 septembre 2013, par mtreeSo I want to grab a frame from a video at a specific time using libav for the use as a thumbnail.
What I'm using is the following code. It compiles and works fine (in regards to retrieving a picture at all), yet I'm having a hard time getting it to retrieve the right picture.
I simply can't get my head around the all but clear logic behind libav's apparent use of multiple time-bases per video. Specifically figuring out which functions expect/return which type of time-base.
The docs were of basically no help whatsoever, unfortunately. SO to the rescue ?
#define ABORT(x) do {fprintf(stderr, x); exit(1);} while(0)
av_register_all();
AVFormatContext *format_context = ...;
AVCodec *codec = ...;
AVStream *stream = ...;
AVCodecContext *codec_context = ...;
int stream_index = ...;
// open codec_context, etc.
AVRational stream_time_base = stream->time_base;
AVRational codec_time_base = codec_context->time_base;
printf("stream_time_base: %d / %d = %.5f\n", stream_time_base.num, stream_time_base.den, av_q2d(stream_time_base));
printf("codec_time_base: %d / %d = %.5f\n\n", codec_time_base.num, codec_time_base.den, av_q2d(codec_time_base));
AVFrame *frame = avcodec_alloc_frame();
printf("duration: %lld @ %d/sec (%.2f sec)\n", format_context->duration, AV_TIME_BASE, (double)format_context->duration / AV_TIME_BASE);
printf("duration: %lld @ %d/sec (stream time base)\n\n", format_context->duration / AV_TIME_BASE * stream_time_base.den, stream_time_base.den);
printf("duration: %lld @ %d/sec (codec time base)\n", format_context->duration / AV_TIME_BASE * codec_time_base.den, codec_time_base.den);
double request_time = 10.0; // 10 seconds. Video's total duration is ~20sec
int64_t request_timestamp = request_time / av_q2d(stream_time_base);
printf("requested: %.2f (sec)\t-> %2lld (pts)\n", request_time, request_timestamp);
av_seek_frame(format_context, stream_index, request_timestamp, 0);
AVPacket packet;
int frame_finished;
do {
if (av_read_frame(format_context, &packet) < 0) {
break;
} else if (packet.stream_index != stream_index) {
av_free_packet(&packet);
continue;
}
avcodec_decode_video2(codec_context, frame, &frame_finished, &packet);
} while (!frame_finished);
// do something with frame
int64_t received_timestamp = frame->pkt_pts;
double received_time = received_timestamp * av_q2d(stream_time_base);
printf("received: %.2f (sec)\t-> %2lld (pts)\n\n", received_time, received_timestamp);Running this with a test movie file I get this output :
stream_time_base: 1 / 30000 = 0.00003
codec_time_base: 50 / 2997 = 0.01668
duration: 20062041 @ 1000000/sec (20.06 sec)
duration: 600000 @ 30000/sec (stream time base)
duration: 59940 @ 2997/sec (codec time base)
requested: 10.00 (sec) -> 300000 (pts)
received: 0.07 (sec) -> 2002 (pts)The times don't match. What's going on here ? What am I doing wrong ?
While searching for clues I stumbled upon this this statement from the libav-users mailing list…
[...] packet PTS/DTS are in units of the format context's time_base,
where the AVFrame->pts value is in units of the codec context's time_base.In other words, the container can have (and usually does) a different
time_base than the codec. Most libav players don't bother using the
codec's time_base or pts since not all codecs have one, but most
containers do. (This is why the dranger tutorial says to ignore AVFrame->pts)…which confused me even more, given that I couldn't find any such mention in the official docs.
Anyway, I replaced…
double received_time = received_timestamp * av_q2d(stream_time_base);…with…
double received_time = received_timestamp * av_q2d(codec_time_base);…and the output changed to this…
...
requested: 10.00 (sec) -> 300000 (pts)
received: 33.40 (sec) -> 2002 (pts)Still no match. What's wrong ?
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