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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (31)
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De l’upload à la vidéo finale [version standalone]
31 janvier 2010, parLe chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
Upload et récupération d’informations de la vidéo source
Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...) -
Support audio et vidéo HTML5
10 avril 2011MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...) -
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 (5845)
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Converting mp3 files to ogg vorbis while retaining cover art using FFmpeg
22 juin 2017, par refi64Title says it all. I’ve tried :
ffmpeg -i 01_FFXV_OST.mp3 -c:a libvorbis 01_FFXV_OST.oggbut I get :
ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
libavutil 55. 44.100 / 55. 44.100
libavcodec 57. 75.100 / 57. 75.100
libavformat 57. 63.100 / 57. 63.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 69.100 / 6. 69.100
libavresample 3. 2. 0 / 3. 2. 0
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, mp3, from '01_FFXV_OST.mp3':
Metadata:
album : FINAL FANTASY XV Original Soundtrack
artist : Yoko Shimomura
album_artist : SQUARE ENIX MUSIC
composer : Yoko Shimomura
disc : 1
genre : Game
title : Somnus (Instrumental Version)
track : 01
date : 2016
Duration: 00:02:29.47, start: 0.023021, bitrate: 306 kb/s
Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 301 kb/s
Metadata:
encoder : LAME3.98r
Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 500x500 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Cover (front)
Automatic encoder selection failed for output stream #0:0. Default encoder for format ogg (codec theora) is probably disabled. Please choose an encoder manually.
Error selecting an encoder for stream 0:0Adding on
-c:v copydoes...nothing :ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
libavutil 55. 44.100 / 55. 44.100
libavcodec 57. 75.100 / 57. 75.100
libavformat 57. 63.100 / 57. 63.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 69.100 / 6. 69.100
libavresample 3. 2. 0 / 3. 2. 0
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, mp3, from '01_FFXV_OST.mp3':
Metadata:
album : FINAL FANTASY XV Original Soundtrack
artist : Yoko Shimomura
album_artist : SQUARE ENIX MUSIC
composer : Yoko Shimomura
disc : 1
genre : Game
title : Somnus (Instrumental Version)
track : 01
date : 2016
Duration: 00:02:29.47, start: 0.023021, bitrate: 306 kb/s
Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 301 kb/s
Metadata:
encoder : LAME3.98r
Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 500x500 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Cover (front)
[ogg @ 0x2ac6e00] Unsupported codec id in stream 0
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:0 -> #0:1 (mp3 (native) -> vorbis (libvorbis))
Last message repeated 1 timesI have absolutely no clue what to do next. I’ve also tried adding
-c:v copyto no avail :ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
libavutil 55. 44.100 / 55. 44.100
libavcodec 57. 75.100 / 57. 75.100
libavformat 57. 63.100 / 57. 63.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 69.100 / 6. 69.100
libavresample 3. 2. 0 / 3. 2. 0
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, mp3, from '01_FFXV_OST.mp3':
Metadata:
album : FINAL FANTASY XV Original Soundtrack
artist : Yoko Shimomura
album_artist : SQUARE ENIX MUSIC
composer : Yoko Shimomura
disc : 1
genre : Game
title : Somnus (Instrumental Version)
track : 01
date : 2016
Duration: 00:02:29.47, start: 0.023021, bitrate: 306 kb/s
Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 301 kb/s
Metadata:
encoder : LAME3.98r
Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 500x500 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Cover (front)
[ogg @ 0x2b6ce00] Unsupported codec id in stream 0
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:0 -> #0:1 (mp3 (native) -> vorbis (libvorbis))
Last message repeated 1 timesI get the same results if I change the stream order (by passing
-map 0:0 -map 0:1). I’m not sure what to do next... -
Using WebRTC to send canvas stream to peer connection
16 août 2021, par namelessI'm currently trying a little project. I have a canvas I can draw in with simple strokes. Now I want to send this canvas content to a MPV player to receive it there, so something like a live stream of the canvas to another computer (in the same network), which receives the live stream via MPV.



I thought about using FFMPEG to send the live stream then, but the question is how..



I found WebRTC (click here) to be able to send a canvas to a peer connection as well as to a video element. Sending it to a video element also works fine, sending to a peer connection didn't work so far.



However I'm still not sure how to send it to FFMPEG or something else in order to receive it on another PC.



Other ideas are also welcome, its mainly about sending the live image of the canvas to another client with a static IP adress.



This, by the way, is the code I tried in order to send the canvas content to a video element :



var canvas = $('#can')[0];
var ctx = canvas.getContext('2d');
var stream = canvas.captureStream(60);

var video = $('#video')[0];
video.srcObject = stream;


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Building x264 with YASM : failing the ASM check
11 janvier 2020, par radiofreemyourenjiMy question up front is, "I have new yasm, I think x264 is supposed to be cool with that, why is x264 not cool with that ?"


For reasons, I am building a CentOS docker image (based on centos:latest) that contains a from-scratch ffmpeg build, following the guide here. It's a good guide, it's worked for me before, so I was feeling good about it.


Today I'm hitting a choke point on the libx264 build point : specifically, I say


PKG_CONFIG_PATH="/tmp/ffmpeg_build/lib/pkgconfig" \
 ./configure \
 --prefix="/tmp/ffmpeg_build" \
 --bindir="/tmp/bin" \
 --enable-static


And I get a reply back




Found no assembler


Minimum version is nasm-2.13


If you really want to compile without asm, configure with —disable-asm.




That's unexpected. I have yasm, which I understand to be 1) there to do the things nasm does but better, and 2) to be the daisy-fresh most modern version given that I pulled it from its repo about an hour ago, and built it about fifty-nine minutes ago. For what it's worth, nasm is on the box too since the instructions request it, but it's below their stated version (i.e. it's "NASM version 2.10.07 compiled on Jun 9 2014")


So it seems like yasm is not being found. There's another StackExchange question that mentions that problem, which came out to a pathing issue. So, I added yasm to my path like so :


PATH=/tmp/ffmpeg_sources/yasm:$PATH \
 PKG_CONFIG_PATH="/tmp/ffmpeg_build/lib/pkgconfig" \
 ./configure
 ...etc


That still gave the Found-no-assembler problem. As a last, confused resort, I told the script explicitly what I wanted to use for the variable $AS, because based on my quick look into configure, that looked like where yasm/nasm was meant to go. The command becomes :


AS=`which yasm`
 PKG_CONFIG_PATH="/tmp/ffmpeg_build/lib/pkgconfig" \
 ./configure
 ...etc


That at least gave




Found yasm 1.3.0


Minimum version is nasm-2.13


If you really want to compile without asm, configure with —disable-asm.




Looking in the config.log I see the following :


checking whether /tmp/bin/yasm supports vmovdqa32 [eax]{k1}{z}, zmm0... no
Failed commandline was:
--------------------------------------------------
/tmp/bin/yasm conftest.asm -I. -I$(SRCPATH) -DARCH_X86_64=1 -I$(SRCPATH)/common/x86/ -f elf64 -o conftest.o
conftest.asm:1: error: instruction expected after label
conftest.asm:1: warning: ignoring unrecognized character `{'
conftest.asm:1: warning: ignoring unrecognized character `}'
conftest.asm:1: warning: ignoring unrecognized character `{'
conftest.asm:1: warning: ignoring unrecognized character `}'
--------------------------------------------------
Failed program was:
--------------------------------------------------
vmovdqa32 [eax]{k1}{z}, zmm0
--------------------------------------------------


So : what's the deal here ? Is my assumption that yasm drop-in replaces nasm bad ? Is yasm good for this purpose, but I'm not providing the right information to ./configure ? Are my instructions for building ffmpeg for CentOS simply out of date with respect to this prerequisite and I should just try harder to get a modern nasm ?


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