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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (39)
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Installation en mode ferme
4 février 2011, parLe mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
C’est la méthode que nous utilisons sur cette même plateforme.
L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...) -
La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Configuration spécifique d’Apache
4 février 2011, parModules spécifiques
Pour la configuration d’Apache, il est conseillé d’activer certains modules non spécifiques à MediaSPIP, mais permettant d’améliorer les performances : mod_deflate et mod_headers pour compresser automatiquement via Apache les pages. Cf ce tutoriel ; mode_expires pour gérer correctement l’expiration des hits. Cf ce tutoriel ;
Il est également conseillé d’ajouter la prise en charge par apache du mime-type pour les fichiers WebM comme indiqué dans ce tutoriel.
Création d’un (...)
Sur d’autres sites (6889)
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Metadata in mp3 not working when piping from ffmpeg with album art
10 février 2019, par CromonIn my program I am piping a webm from a stream to ffmpeg and then pipe the output to a http request. Part of the process is adding metadata for the mp3. This has so far worked great. However after adding an image as album art it has started to act unexpected.
First this is the command line I am using inside the program :
val parameters = listOf("ffmpeg",
"-i", "-",
"-i", albumImage.absolutePath,
"-map", "0",
"-map", "1",
"-c:v", "copy",
"-f", "mp3",
"-id3v2_version", "4",
"-metadata", "title=${info.title}",
"-metadata", "album=YouTube",
"-metadata", "artist=${info.author}",
"-metadata:s:v", "title=Album Cover",
"-metadata:s:v", "comment=Cover (front)",
"-"
)It creates a valid mp3 file and I can find both the metadata and the image in the mp3 file, however when playing it none of them are displayed in VLC or anywhere else. To test various configurations I have converted it to the command line.
In a first try I have saved the video and the image and stopped using pipes altogether, which results in this :
ffmpeg -i video.webm -i image.jpeg -map 0 -map 1 -c:v copy -f mp3 -id3v2_version 4 -metadata title="Tiësto & KSHMR feat. Vassy - Secrets (Official Music Video)" -metadata album="YouTube" -metadata artist="Spinnin' Records" -metadata:s:v title="Album Cover" -metadata:s:v comment="Cover (front)" output3.mp3
In this case all metadata including the album art is displayed in VLC.
I then recreated the same thing as in my program, piping both video input and audio output, looking like this :
ffmpeg -i - -i image.jpeg -map 0 -map 1 -c:v copy -f mp3 -id3v2_version 4 -metadata title="Tiësto & KSHMR feat. Vassy - Secrets (Official Music Video)" -metadata album="YouTube" -metadata artist="Spinnin' Records" -metadata:s:v title="Album Cover" -metadata:s:v comment="Cover (front)" - < video.webm > output3.mp3
This file is the same as my programs output. Neither title nor album nor album image are displayed (however it can play the file)
To test a few more options I have hardcoded the output file but pipe the input file like this :
ffmpeg -i - -i image.jpeg -map 0 -map 1 -c:v copy -f mp3 -id3v2_version 4 -metadata title="Tiësto & KSHMR feat. Vassy - Secrets (Official Music Video)" -metadata album="YouTube" -metadata artist="Spinnin’ Records" -metadata:s:v title="Album Cover" -metadata:s:v comment="Cover (front)" output3.mp3 < video.webm
Now the metadata is working again. When hardcoding the input video and piping the output, its again gone.
So to sum up : When piping the output of ffmpeg the metadata in the file is not properly working. Interestingly the stderr output of ffmpeg looks quite similar
Hardcoded output3.mp3 :
ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
Input #0, matroska,webm, from 'pipe:':
Metadata:
encoder : google/video-file
Duration: 00:03:39.58, start: -0.007000, bitrate: N/A
Stream #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
Input #1, image2, from 'image.jpeg':
Duration: 00:00:00.04, start: 0.000000, bitrate: 1466 kb/s
Stream #1:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 320x180, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (opus (native) -> mp3 (libmp3lame))
Stream #1:0 -> #0:1 (copy)
Output #0, mp3, to 'output3.mp3':
Metadata:
TPE1 : Spinnin' Records
TIT2 : Tiësto & KSHMR feat. Vassy - Secrets (Official Music Video)
TALB : YouTube
TSSE : Lavf57.83.100
Stream #0:0(eng): Audio: mp3 (libmp3lame), 48000 Hz, stereo, fltp (default)
Metadata:
encoder : Lavc57.107.100 libmp3lame
Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 320x180, q=2-31, 25 tbr, 25 tbn, 25 tbc
Metadata:
title : Album Cover
comment : Cover (front)With pipe output :
ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
Input #0, matroska,webm, from 'pipe:':
Metadata:
encoder : google/video-file
Duration: 00:03:39.58, start: -0.007000, bitrate: N/A
Stream #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
Input #1, image2, from 'image.jpeg':
Duration: 00:00:00.04, start: 0.000000, bitrate: 1466 kb/s
Stream #1:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 320x180, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (opus (native) -> mp3 (libmp3lame))
Stream #1:0 -> #0:1 (copy)
Output #0, mp3, to 'pipe:':
Metadata:
TPE1 : Spinnin' Records
TIT2 : Tiësto & KSHMR feat. Vassy - Secrets (Official Music Video)
TALB : YouTube
TSSE : Lavf57.83.100
Stream #0:0(eng): Audio: mp3 (libmp3lame), 48000 Hz, stereo, fltp (default)
Metadata:
encoder : Lavc57.107.100 libmp3lame
Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 320x180, q=2-31, 25 tbr, 25 tbn, 25 tbc
Metadata:
title : Album Cover
comment : Cover (front) -
How to set header metadata to encoded video ?
11 juin 2013, par JonaI'm encoding some images into an h264 video inside an mp4 container. I'm essentially using the ffmpeg example muxing.c. The thing is I'm trying to set some metadata in the mp4 container such as artist, title, etc...
I thought using the following would work but it didn't :
AVDictionary *opts = NULL;
av_dict_set(&opts, "title", "Super Lucky Dude", 0);
av_dict_set(&opts, "author", "Jacky Chan", 0);
av_dict_set(&opts, "album", "Chinese Movie", 0);
av_dict_set(&opts, "year", "05/10/2013", 0);
av_dict_set(&opts, "comment", "This video was created using example app.", 0);
av_dict_set(&opts, "genre", "Action", 0);
// Write the stream header, if any.
ret = avformat_write_header(oc, &opts);After the whole video is created I don't see any metadata written to the video file. Any pointers how to actually do this properly ?
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Adding metadata informations with ffmpeg
21 juillet 2017, par StevaI am trying to read and most important to write metadata into file using ffmpeg. But I am getting sigseg.
int main(int argc, char **argv) {
av_register_all();
AVFormatContext* ctx;
std::string path("/home/stefan/test_track.mp3");
ctx = avformat_alloc_context();
if (avformat_open_input(&ctx, path.c_str(), 0, 0) < 0)
std::cout << "error1" << std::endl;
if (avformat_find_stream_info(ctx, 0) < 0)
std::cout << "error2" << std::endl;
AVDictionaryEntry *tag = nullptr;
tag = av_dict_get(ctx->metadata, "artist", tag, AV_DICT_IGNORE_SUFFIX);
std::cout << tag->key << " : " << tag->value << std::endl;
av_dict_set(&ctx->metadata, "TPFL", "testtest", 0);
std::cout << "test!" << std::endl;
int status = avformat_write_header(ctx, &ctx->metadata);
if(status == 0)
std::cout << "test1" << std::endl;
return 0;
}I also tried to make a entire copy of AVDictionary and than saving it with new addition of field I want to save. But still sigseg.
What am I missing ?