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  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • Demande de création d’un canal

    12 mars 2010, par

    En fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
    Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...)

Sur d’autres sites (4862)

  • How do you set up carrierwave-video with ffmpeg ?

    24 septembre 2013, par Maleckai

    This has been doing my head in for the past 2 days, and I just cannot seem to get it working.

    I am building a simple Rails app with the sole purpose of uploading & processing images and videos. I'm working on Ubuntu Linux.

    Here's the relevant gems in my Gemfile :

    gem 'delayed_job_active_record'
    
gem 'carrierwave'
    
gem 'carrierwave-video'
    
gem 'carrierwave_backgrounder'
    
gem 'mini_magick'
    
gem 'streamio-ffmpeg'

    At first I was having problems with ffmpeg complaining about certain arguments (I determined this by taking the command the rails app attempted to run when it was to convert a video, and running it manually outside rails), which I discovered was because the version of ffmpeg I was using was 'too new'. So I downgraded to 1.2.1, which is what streamio-ffmpeg says is the only version of ffmpeg they're tested against.

    After that, I could run the command manually, fine. But whenever I tried to convert through the app, I'd get the error :

    Failed to transcode with FFmpeg. Check ffmpeg install and verify video is not corrupt or cut short. Original error: nil is not a symbol

    I did a bit of Googling on the error, and only came up with one relevant result, but nothing in there has helped my situation.

    I'm at a total loss at this point, and am not sure where I can go from here. I assume many of people have tried this before, so I'm hoping someone can guide me on the exact steps they took to get carrierwave-video & ffmpeg working together.

  • Defining moment of the audio attenuation through ffmpeg

    23 août 2016, par riki-tik

    There are audio tracks of different lengths in m4a format. And there’s ffmpeg library for working with the media. Many of the tracks have the effect of "decay" in the end, and it is necessary to determine at what point it occurs (determined once and the value entered in the database along with other information about the track). Those. we must somehow determine that the track begins to fade, and its volume reached 30% compared to the total volume of the song. Is it possible to solve by means of ffmpeg, and if so, how ?

  • mediastreamvalidator "Error injecting segment data" and Can't deal with multiple sample timings per sample buffer

    18 août 2016, par Dathan Vance Pattishall

    So using ffmpeg

    /usr/local/bin/ffmpeg -i track.m4a -vn -c:a aac -b:a 192k  -f segment -segment_list 93_jrf2niqb7n2s8pzjopkqvbbw1wmzz3foqrsa93bm.m3u8 -segment_time 120 -segment_format_options movflags=faststart  93_jrf2niqb7n2s8pzjopkqvbbw1wmzz3foqrsa93bm.%03d.m4a

    a playlist file is created where

    #EXTM3U
    
#EXT-X-VERSION:3
    
#EXT-X-MEDIA-SEQUENCE:0
    
#EXT-X-ALLOW-CACHE:YES
    
#EXT-X-TARGETDURATION:121
    
#EXTINF:120.000726,
    
93_jrf2niqb7n2s8pzjopkqvbbw1wmzz3foqrsa93bm.000.m4a
    
#EXTINF:119.883175,
    
93_jrf2niqb7n2s8pzjopkqvbbw1wmzz3foqrsa93bm.001.m4a
    
#EXT-X-ENDLIST

    Then using mediastreamvalidator I get the following output which leads me to believe there are errors which I have no idea how to fix. I am assuming that ffmpeg is jacking up the segmenting.

    mediastreamvalidator http://**OMIT**/AMP/1/92_y7lu9u1qy5wsw2fqn61mankqof7lkuu5qvk7asv5.m3u8
    
mediastreamvalidator: Version 1.2(160525)
    

    
[/AMP/1/92_y7lu9u1qy5wsw2fqn61mankqof7lkuu5qvk7asv5.m3u8] Started root playlist download
    
[/AMP/1/92_y7lu9u1qy5wsw2fqn61mankqof7lkuu5qvk7asv5.m3u8] Started media playlist download
    
Error injecting segment data
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
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Can't deal with multiple sample timings per sample buffer
    
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Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
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Can't deal with multiple sample timings per sample buffer
    
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Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
Can't deal with multiple sample timings per sample buffer
    
[/AMP/1/92_y7lu9u1qy5wsw2fqn61mankqof7lkuu5qvk7asv5.m3u8] All media files delivered and have end tag, stopping
    

    
--------------------------------------------------------------------------------
    
http://**OMIT**/AMP/1/92_y7lu9u1qy5wsw2fqn61mankqof7lkuu5qvk7asv5.m3u8
    
--------------------------------------------------------------------------------
    
Processed 1 out of 2 segments
    
Average segment duration: 119.941950
    
Total segment bitrates (all discontinuities): average: 130.88 kb/s, max: 131.25 kb/s
    

    

    
Discontinuity: sequence: 0, parsed segment count: 1 of 2, duration: 239.884 sec, average: 130.88 kb/s, max: 131.25 kb/s
    
Track ID: 1
    
Audio Codec: AAC-LC
    
Audio sample rate: 44100 Hz
    
Audio channel layout: Stereo (L R)

    So, my question is what is "Error injecting segment data" and "Can’t deal with multiple sample timings per sample buffer" and why is the segment messed up ?

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