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Ffmpeg extract audio duration #1199

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opened 2026-02-20 23:22:56 -05:00 by deekerman · 3 comments

deekerman commented

2026-02-20 23:22:56 -05:00

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Originally created by @vanilla38 on GitHub (Oct 7, 2013).

Hello, everyone knows that ffmpeg returns wrong duration when we extract mp3 file using youtube-dl.

I wonder if someone already solved this problem and if not, if someone can tell me where i can find ffmpeg instruction in the code.

Thanks.

Originally created by @vanilla38 on GitHub (Oct 7, 2013). Hello, everyone knows that ffmpeg returns wrong duration when we extract mp3 file using youtube-dl. I wonder if someone already solved this problem and if not, if someone can tell me where i can find ffmpeg instruction in the code. Thanks.

deekerman closed this issue

2026-02-20 23:22:58 -05:00

deekerman commented

2026-02-20 23:22:59 -05:00

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@phihag commented on GitHub (Oct 7, 2013):

Closing as duplicate of #1022. The code of youtube-dl that calls ffmpeg is in PostProcessor.py.

@phihag commented on GitHub (Oct 7, 2013): Closing as duplicate of #1022. The code of youtube-dl that calls ffmpeg is in [PostProcessor.py](https://github.com/rg3/youtube-dl/blob/master/youtube_dl/PostProcessor.py#L58).

deekerman commented

2026-02-20 23:23:01 -05:00

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@vanilla38 commented on GitHub (Oct 7, 2013):

Okay, i started to work on it, btw do you got any way to pass "video_duration" variable from youtube.py to PostProcessor.py file ? Thanks.

@vanilla38 commented on GitHub (Oct 7, 2013): Okay, i started to work on it, btw do you got any way to pass "video_duration" variable from youtube.py to PostProcessor.py file ? Thanks.

deekerman commented

2026-02-20 23:23:01 -05:00

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@vanilla38 commented on GitHub (Oct 10, 2013):

For people still trying to fix this => apt-get install vbrfix

syntax:
vbrfix file1.mp3 file2.mp3

this will correct mp3 headers and set a correct duration and bitrate without remuxe it.

thanks.

@vanilla38 commented on GitHub (Oct 10, 2013): For people still trying to fix this => apt-get install vbrfix syntax: vbrfix file1.mp3 file2.mp3 this will correct mp3 headers and set a correct duration and bitrate without remuxe it. thanks.

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