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Ovichan
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DRC isnt disabled for Premiere for editing it on audition

Aug 2, 2012 5:38 PM

Tags: #off #disable #ac3 #turn #drc

Why if I import ac3 on premiere and export to audition for editing, it create wave file without turn off DRC??? It is a big error, DRC must be disable!!!!

1086 Views   8 Replies   Latest reply: Ovichan, Apr 4, 2013 5:34 PM
 
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  • Jim Simon
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    1. Jim Simon,
    Aug 2, 2012 6:58 PM   in reply to Ovichan
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    What's DRC?

     
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  • shooternz
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    2. shooternz,
    Aug 2, 2012 7:21 PM   in reply to Jim Simon
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    http://drc-fir.sourceforge.net/

     
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  • Ovichan
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    3. Ovichan,
    Aug 2, 2012 11:35 PM   in reply to shooternz
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    Thanks for link but exist other methods more easy as libavcodec of directshow/ffmpeg

     

    DRC: dinamyc range compression

     

    http://en.m.wikipedia.org/wiki/Dynamic_range_compression

     

    Dolby use it for encoding audio but for editing is necessary turn off before of decoding to wave. Premiere dont do it and is a error but the audio generated will be deformed or corrupt.

     
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  • Jim Simon
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    4. Jim Simon,
    Aug 3, 2012 12:51 AM   in reply to Ovichan
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    To the best of my knowledge, MP3s do not include effects that can be "turned off" or otherwise adjusted after the fact.  If an effect or filter was applied during the creation of the MP3, it's baked in and you can't remove it.

     
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  • Ovichan
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    5. Ovichan,
    Aug 3, 2012 2:47 AM   in reply to Jim Simon
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    Maybe I dont explain properly. Adobe Premiere uses license of Dolby therefore uses his encoder/decoder. DRC is a parameter of decoder, if drc=true (on) then this effect is aplied to audio. On edition of audio the use of DRC isnt correct. This effect is used in media players too and maybe his uses is more properly, although not ever. Personally I dont like have my audio limited in volume.

     
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  • Jim Simon
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    6. Jim Simon,
    Aug 3, 2012 7:55 AM   in reply to Ovichan
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    My mistake.  I was thinking MP3 not AC3.

     
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  • Ovichan
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    7. Ovichan,
    Aug 11, 2012 5:38 AM   in reply to Ovichan
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    Did no engineer will not respond to such information?

     
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  • Ovichan
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    8. Ovichan,
    Apr 4, 2013 5:34 PM   in reply to Ovichan
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    One way for solution is:

     

    1. First remove dialog normalitazion

    2. Use this code with ffmpeg tools:

     

    ffmpeg -drc_scale 0.000000 -i sound.ac3 -f wav sound.wav

     

    More info: http://forum.doom9.org/showthread.php?t=56020

     
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