ffmpeg overwrite output file if exists

Question

I ran:

ffmpeg -i input.flac output.mp3

This prompts:

File 'output.mp3' already exists. Overwrite? [y/N] y

How do I automatically say "yes"?

score 545 · Accepted Answer · edited Jul 14 '21 at 20:25

545

Use the -y option to automatically overwrite [docs]:

ffmpeg -y -i input.flac output.mp3

edited Jul 14 '21 at 20:25

Mateen Ulhaq

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answered Sep 30 '16 at 10:15

Veer

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Alternatively there is also the `-n` option to automatically never overwrite files. – llogan Dec 21 '17 at 21:10
22

for YES -y and for NO -n. – Veer Feb 13 '18 at 12:44
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Link to relevant documentation for those interested: https://ffmpeg.org/ffmpeg.html#toc-Main-options – TheKarateKid Jun 17 '19 at 15:58

Muhammad Omer Aslam · Answer 2 · 2019-02-18T14:46:59.137

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I need to add the -y global switch before specifying the output file to accomplish this

ffmpeg -i /audio/191079007530_1_01.flac -t 51 -ss 69 -y /clips/44z274v23303t264y2z2s2s2746454t234_clip.mp3 2>&1 >> /ffmpegLogs.log

Alternatively, you can use the -n option to deny overriding the file.

edited Feb 18 '19 at 14:46

answered Sep 30 '16 at 10:16

Muhammad Omer Aslam

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It's perfectly fine to answer your own question, even right away. It helped me find the answer I was looking for - that's what SO is all about. https://meta.stackexchange.com/questions/17845/etiquette-for-answering-your-own-question – squarecandy Aug 06 '18 at 14:49

score 19 · Answer 3 · answered May 05 '22 at 08:04

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If there's someone using the ffmpeg-python wrapper, then you can use overwrite_output arg when running the stream.

stream = ffmpeg.input('dummy.mp4')
stream = ffmpeg.filter(stream, 'fps', fps=25, round='up')
stream = ffmpeg.output(stream, 'dummy2.mp4')
ffmpeg.run(stream, overwrite_output=True)

answered May 05 '22 at 08:04

leminhnguyen

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was looking for this exact thing, thanks! – cwongmath Jun 01 '22 at 16:54
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thnks, like to cmd docs: https://kkroening.github.io/ffmpeg-python/ – Sheece Gardazi Jul 31 '22 at 13:21
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Exactly my use case, tysm! The only difference is that I was using it chained and without `stream`, like this: `...run(overwrite_output=True)` – Dan Mar 27 '23 at 15:39
glad to see my answer helps many people out there ^^ – leminhnguyen Mar 28 '23 at 09:48

ffmpeg overwrite output file if exists

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