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  • Automated installation script of MediaSPIP

    25 avril 2011, par

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    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
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Sur d’autres sites (9151)

  • bash loop through list of file paths - characters get removed when sending to ffmpeg [duplicate]

    9 octobre 2018, par Brad Johnson

    This question already has an answer here :

    I have a text file that contains a list of paths to flac files I want to convert to wav. Here is a small section of it :

    /mnt/nfs/Music/Rob D/1995 - Clubbed To Death/Rob D - 02 - Clubbed To Death _Kurayamino Variation_.flac
    
/mnt/nfs/Music/Blonde Redhead/2000 - Melody of Certain Damaged Lemons/11 - For the Damaged Coda.flac
    
/mnt/nfs/Music/I Monster/2001 - Daydream In Blue/01 - Daydream In Blue.flac
    
/mnt/nfs/Music/Moby/2002 - Extreme Ways/01 - Extreme Ways.flac
    
/mnt/nfs/Music/RJD2/2002 - Deadringer/01 - The Horror.flac
    
/mnt/nfs/Music/RJD2/2002 - Deadringer/03 - Smoke & Mirrors.flac
    
/mnt/nfs/Music/RJD2/2002 - Deadringer/06 - Ghostwriter.flac
    
/mnt/nfs/Music/RJD2/2002 - Deadringer/10 - Chicken-Bone Circuit.flac
    
/mnt/nfs/Music/FC Kahuna/2003 - Hayling/01 - Hayling _Original_.flac
    
/mnt/nfs/Music/Lamb/2003 - Between Darkness and Wonder/04 - Angelica.flac

    I’m trying to loop through it like so :

    while read -r line; do
    
 wavfile=$(basename "$line")
    
 wavfile="${wavfile%.*}"
    
 ffmpeg -i "$line" "$2/$wavfile.wav"
    
done <$1

    ...where $1 is where I would pass the name of the text file and $2 is the destination directory.

    Here is the output with the irrelevant ffmpeg junk pruned out :

    Input #0, flac, from '/mnt/nfs/Music/Rob D/1995 - Clubbed To Death/Rob D - 02 - Clubbed To Death _Kurayamino Variation_.flac':
    
...
    
Output #0, wav, to '/mnt/gray/Clubbed To Death/Rob D - 02 - Clubbed To Death _Kurayamino Variation_.wav':
    
...
    
/nfs/Music/Blonde Redhead/2000 - Melody of Certain Damaged Lemons/11 - For the Damaged Coda.flac: No such file or directory
    
...
    
Input #0, flac, from '/mnt/nfs/Music/I Monster/2001 - Daydream In Blue/01 - Daydream In Blue.flac':
    
...
    
Output #0, wav, to '/mnt/gray/Clubbed To Death/01 - Daydream In Blue.wav':
    
...
    
nt/nfs/Music/Moby/2002 - Extreme Ways/01 - Extreme Ways.flac: No such file or directory
    
...
    
Input #0, flac, from '/mnt/nfs/Music/RJD2/2002 - Deadringer/01 - The Horror.flac':
    
...
    
Output #0, wav, to '/mnt/gray/Clubbed To Death/01 - The Horror.wav':
    
...
    
nt/nfs/Music/RJD2/2002 - Deadringer/03 - Smoke & Mirrors.flac: No such file or directory
    
...
    
Input #0, flac, from '/mnt/nfs/Music/RJD2/2002 - Deadringer/06 - Ghostwriter.flac':
    
...
    
Output #0, wav, to '/mnt/gray/Clubbed To Death/06 - Ghostwriter.wav':
    
...
    
nt/nfs/Music/RJD2/2002 - Deadringer/10 - Chicken-Bone Circuit.flac: No such file or directory
    
...
    
Input #0, flac, from '/mnt/nfs/Music/FC Kahuna/2003 - Hayling/01 - Hayling _Original_.flac':
    
...
    
Output #0, wav, to '/mnt/gray/Clubbed To Death/01 - Hayling _Original_.wav':
    
...
    
/nfs/Music/Lamb/2003 - Between Darkness and Wonder/04 - Angelica.flac: No such file or directory

    If you pay attention to the paths that ffmpeg reports don’t exist, you’ll see that a seemingly random number of characters has been removed from the beginning. This appears to happen on even numbered lines, but odd numbered lines work. I can only reproduce this behavior when using ffmpeg. If I replace the ffmpeg line with a simple echo statement, every file path is shown to be correct. How can this be ?

    Other suggestions of accomplishing this are also welcome, however I do need the files processed in the order by which I have them listed in the file.

  • Error opening filters : Running ffmpeg through Groovy and ProcessBuilder

    30 octobre 2016, par smeeb

    This question involves the popular Linux media processing utility "ffmpeg", but I think its really a Java 8 ProcessBuilder question at its core. Or possibly an issue w/ Groovy GStrings.

    The ffmpeg command to split an MP4 video into frames/images based on a sampling rate is :

    ffmpeg -i /some/path/to/video.mp4 -vf "select=not(mod(n\,${samplingRate}))" -vsync vfr -q:v 2 img_%d.jpg

    Where ${samplingRate} is a positive integer and represents the number of frames to skip in between creating each frame. So for instance, if you had a video with 430 frames in it, and wanted to sample every 50th frame, your command would be :

    ffmpeg -i /some/path/to/video.mp4 -vf "select=not(mod(n\,50))" -vsync vfr -q:v 2 img_%d.jpg

    Which would then create 8 (or maybe 9, not gonna do the math for a pretend example) JPG files called img_1.jpg, img_2.jpg, ...etc. The first image would be the 50th frame in the video. The second image would be the 100th frame, etc. I have ran the above command directly from a terminal and confirmed that it is correct and succeeds without errors.

    I have a Groovy app, and am trying to run this ffmpeg command via a Java 8 ProcessBuilder, and am having issues with the select= argument. Currently I have :

    int numSamples = 50
    
Process frameSamplerProc = new ProcessBuilder(
    
    'ffmpeg',
    
    '-i',
    
    "/home/myuser/some/path/to/video.mp4",
    
    '-vf',
    
    "\"select=not(mod(n\\,${numSamples}))\"",
    
    '-vsync',
    
    'vfr',
    
    '-q:v',
    
    '2',
    
    'sample%d.jpg'
    
).redirectErrorStream(true).start()
    

    
frameSamplerProc.inputStream.eachLine { fsamplerLine ->
    
    println(fsamplerLine)
    
}

    When I run thise code, I don’t get any errors, but I do see errors in ffmpeg’s output :

    ffmpeg version N-81995-gd790e48 Copyright (c) 2000-2016 the FFmpeg developers
    
// Omitting the next ~50 lines of output as it all looks normal
    

    
Metadata:
    
  creation_time   : 2016-10-27T20:20:01.000000Z
    
  handler_name    : SoundHandle
    
[AVFilterGraph @ 0x3eddc80] No such filter: '"select'
    
Error opening filters!

    I’m wondering if I’m not escaping the select argument properly or if I’m passing in a bad array to the ProcessBuilder. Can anybody spot where I’m going awry ?

  • How can i split a video file in C# ?

    19 février 2015, par fthymn

    I’m using c# on vs2012.
    I wanna split to video file for a custom time arrange.
    For Example ; my video file length 30 minutes and i want to watching just selection time arrange. (like between 10th second and 45th second.)

    I dont want to physical new file.

    My steps for what am i doing :)

    1- Select Source Video File.
    2- I must learn source video time length.
    3- I use rangetrackbar control user select time arrange.
    4- User click play then selected time arrange scenes played.

    Is it possible ?

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