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  • List of compatible distributions

    26 April 2011, by

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Les tâches Cron régulières de la ferme

    1 December 2010, by

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • Publier sur MédiaSpip

    13 June 2013

    Puis-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

On other websites (7793)

  • file: Add an option for following a file that is being written

    5 February 2015, by Martin Storsjö
    file: Add an option for following a file that is being written

    Using this requires setting the rw_timeout option to make it
    
terminate, alternatively using the interrupt callback (if used via
    
the API).
    

    Signed-off-by: Martin Storsjö <martin@martin.st>
    • [DBH] doc/protocols.texi
    • [DBH] libavformat/file.c
    • [DBH] libavformat/version.h

  • No such file or directory Error with FFMPEG + CarrierWave screenshot method

    10 July 2013, by dodgerogers747

    I am using AWS CORS to upload videos to my site, all of which works as planned.

    I have the following model method which runs as an after_create callback (for speed) to take a screenshot from the video file on AWS. I plan to move this out into a delayed job but I don't think this will solve this particular issue. Please advise if mistaken.

    I use FFMPEG to take a screenshot from the AWS self.file location, I then send the file to CarrierWave by saving the file to self.screenshot where it is uploaded to AWS.

    Approx. 50% of the time it errors out with Errno::ENOENT - No such file or directory for the location of the screenshot image.

    How can I rectify my code to remove this error and how come it only occurs around 50% of the time? If anyone needs more code just shout.

    video.rb

    after_create :take_screenshot
    

    
mount_uploader :screenshot, ImageUploader
    

    
  def take_screenshot
    
    location = "#{Rails.root}/public/uploads/tmp/screenshots/#{unique}_#{File.basename(file)}.jpg"
    
    system `ffmpeg #{log_level} -i #{self.file} -ss 00:00:0#{time_frame} -vframes 1 #{location}`
    
    logger.debug "Trying to take screenshot from #{self.file}"
    
    #pass the actual file to CarrierWave to handle the image upload
    
    self.screenshot = File.open(location)
    
    self.save
    
    logger.debug "Deleting tmp file: #{location}: #{File.delete(location)}" if self.screenshot.present?
    
  end
    

    
def unique
    
    (0..6).map{(65+rand(26)).chr}.join
    
  end
    

    
def log_level
    
    "-loglevel panic"
    
  end
    

    
  def time_frame
    
    rand(0..3)
    
  end

    Stack trace:

    Started POST "/videos" for 127.0.0.1 at 2013-07-10 03:58:49 +0800
    
Processing by VideosController#create as JS
    
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"6M1Ia+Ag2E3HVKH2PO/p7jewxSpMPdWeVHGA933Bzjw=", "video"=>{"file"=>"http://bucketname.s3.amazonaws.com/uploads/video/file/671a87fb-91de-4eaf-a38a-1b25c51798e5/Good_7iron.m4v"}}
    
  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 9 LIMIT 1
    
   (0.1ms)  BEGIN
    
  SQL (0.2ms)  INSERT INTO `videos` (`created_at`, `file`, `question_id`, `screenshot`, `updated_at`, `user_id`) VALUES (&#39;2013-07-09 19:58:49&#39;, &#39;http://bucketname.s3.amazonaws.com/uploads/video/file/671a87fb-91de-4eaf-a38a-1b25c51798e5/Good_7iron.m4v&#39;, NULL, NULL, &#39;2013-07-09 19:58:49&#39;, 9)
    
Trying to take screenshot from http://bucketname.s3.amazonaws.com/uploads/video/file/671a87fb-91de-4eaf-a38a-1b25c51798e5/Good_7iron.m4v
    
   (0.8ms)  ROLLBACK
    
Completed 500 Internal Server Error in 3550ms
    

    
Errno::ENOENT - No such file or directory - /Users/me/rails/project/public/uploads/tmp/screenshots/WCACLIC_Good_7iron.m4v.jpg:
    
  app/models/video.rb:24:in `initialize&#39;
    
  app/models/video.rb:24:in `open&#39;
    
  app/models/video.rb:24:in `take_screenshot&#39;

  • 'C' program to pipeout audio file to FFMPEG and generate Video file

    9 May 2017, by soflow

    I am attempting to write a short ’C’ program which reads in an Audio file using FFMPEG, processes that file using a ’C’ program, and then outputs a file via FFMEPG, which combines the new, modified audio together with a Video representation using the FFMPEG showwaves filter.

    At present the program attempts to do the following:-

    i) Read in an audio file, using pipein thorugh FFMPEG
    ii) Process the audio file using a portion of the ’C’ program
    iii) Pipeout the modified audio to FFMPEG, and generate a file using the ’showwaves’ filter in FFMEPG to create an MP4 file with audio and video.

    The following code run form the ommand line in FFMPEG generates the Audio/Video MP4 I want to create:-

    ffmpeg -y -f s16le -ar 44100 -ac 1 -i 12345678.wav  -i 12345678.wav  -filter_complex  "[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" -map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  12345678.mp4

    "

    This code generates a processed audio file, and outputs it to a .wav file as required:-

    #include 
    
#include 
    
#include 
    

    
void main()
    
{
    
// Launch two instances of FFmpeg, one to read the original WAV
    
// file and another to write the modified WAV file. In each case,
    
// data passes between this program and FFmpeg through a pipe.
    
FILE *pipein;
    
FILE *pipeout;
    
pipein  = popen("ffmpeg -i 12345678.wav -f s16le -ac 1 -", "r");
    
pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i - out.wav", "w");
    

    
// Read, modify and write one sample at a time
    
int16_t sample;
    
int count, n=0;
    
while(1)
    
{
    
    count = fread(&amp;sample, 2, 1, pipein); // read one 2-byte sample
    
    if (count != 1) break;
    
    ++n;
    
    sample = sample * sin(n * 5.0 * 2*M_PI / 44100.0);
    
    fwrite(&amp;sample, 2, 1, pipeout);
    
}
    

    
// Close input and output pipes
    
pclose(pipein);    
    
pclose(pipeout);
    
}

    (This code borrowed from ted Burke’s excellent post here)

    I have made an attempt as shown below, but this is not working:-

    #include 
    
#include 
    
#include 
    

    
void main()
    
{
    
// Launch two instances of FFmpeg, one to read the original WAV
    
// file and another to write the modified WAV file. In each case,
    
// data passes between this program and FFmpeg through a pipe.
    
FILE *pipein;
    
FILE *pipeout;
    
pipein  = popen("ffmpeg -i 12345678.wav -f s16le -ac 1 -", "r");
    
pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i 12345678.wav  -i 
    
12345678.wav  -filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    
", "w");
    

    

    
// Read, modify and write one sample at a time
    
int16_t sample;
    
int count, n=0;
    
while(1)
    
{
    
    count = fread(&amp;sample, 2, 1, pipein); // read one 2-byte sample
    
    if (count != 1) break;
    
    ++n;
    
    sample = sample * sin(n * 5.0 * 2*M_PI / 44100.0);
    
    fwrite(&amp;sample, 2, 1, pipeout);
    
}
    

    
// Close input and output pipes
    
pclose(pipein);    
    
pclose(pipeout);
    
}    

    Ideally someone can suggest an improved version of the pipeout command above - alternately another process to achieve this would be interesting

    * EDIT *

    Thanks to @Mulvya, the revised pipeout line is now:-

    pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -filter_complex  "[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" -map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  12345678.mp4

    ", "w");

    On compiling with gcc I get the following error messages :-

    avtovid2.c: In function \u2018main\u2019:
    

    
wavtovid2.c:13:83: error: expected \u2018]\u2019 before \u2018:\u2019 
    
token
    
 pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -
    
filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    

    
^
    
wavtovid2.c:13:86: error: expected \u2018)\u2019 before 
    
\u2018showwaves\u2019
    
 pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -
    
filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    

    
^
    
wavtovid2.c:13:98: error: invalid suffix "x720" on integer constant
    
 pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -
    
filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    

    
^
    
wavtovid2.c:13:153: warning: missing terminating " character
    
 pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -
    
filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    

    
^
    
wavtovid2.c:13:86: error: missing terminating " character
    
 pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -
    
filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    

    
^
    
wavtovid2.c:14:6: warning: missing terminating " character
    
 ", "w");
    
  ^
    
wavtovid2.c:14:1: error: missing terminating " character
    
 ", "w");
    
 ^
    
wavtovid2.c:13:21: warning: passing argument 1 of \u2018popen\u2019 makes 
    
pointer from integer without a cast
    
 pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -
    
filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    
                 ^
    
In file included from wavtovid2.c:1:0:
    
/usr/include/stdio.h:872:14: note: expected \u2018const char *\u2019 but 
    
argument is of type \u2018char\u2019
    
 extern FILE *popen (const char *__command, const char *__modes) __wur;
    
          ^
    
wavtovid2.c:13:15: error: too few arguments to function \u2018popen\u2019
    
 pipeout = popen("ffmpeg -y -f s16le -ar 44100 -ac 1 -i -  -
    
filter_complex  "
    
[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" 
    
-map 1:a:0 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -
    
codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart  
    
12345678.mp4
    
           ^ 
    
In file included from wavtovid2.c:1:0:
    
/usr/include/stdio.h:872:14: note: declared here
    
 extern FILE *popen (const char *__command, const char *__modes) __wur;
    
          ^
    
wavtovid2.c:32:1: error: expected \u2018;\u2019 before \u2018}\u2019 
    
token
    
 }

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