# FFMPEG Query

**URL:** <https://www.ruby-forum.com/t/ffmpeg-query/175976>\
**Category:** Rails\
**Created:** [September 23, 2009, 9:33am UTC](https://www.ruby-forum.com/t/ffmpeg-query/175976 "2009-09-23T09:33:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![salil](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/c89c15/32.png) [@salil](https://www.ruby-forum.com/u/salil)\
**Post date:** [September 23, 2009, 9:33am UTC](https://www.ruby-forum.com/t/ffmpeg-query/175976/1 "2009-09-23T09:33:36Z")

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Hi All,

I want to convert a video file which is located at the Amazon-S3 Store,  
through ffmpeg. How can it b possible? please help me if anyone have any  
idea.

for ex:-  
is it possible to execute following command:-

system "ffmpeg -i  
‘[http://s3.amazonaws.com/discoveryfour/001.igor\_nay\_telstra%20copy.mp4?AWSAccessKeyId=1QM20RW1CJAFGTH5YHR2&Expires=1253689953&Signature=DXBh2HOXqAknQrloHdLTNP%2FwZ2w%3D](http://s3.amazonaws.com/discoveryfour/001.igor_nay_telstra%20copy.mp4?AWSAccessKeyId=1QM20RW1CJAFGTH5YHR2&Expires=1253689953&Signature=DXBh2HOXqAknQrloHdLTNP%2FwZ2w%3D)’  
-b 64k ‘salil.avi’ "

Thanks in Advance.

Regards,  
Salil G.

---

<div class="post-metadata">

**Author:** ![salil](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/c89c15/32.png) [@salil](https://www.ruby-forum.com/u/salil)\
**Post date:** [September 23, 2009, 11:55pm UTC](https://www.ruby-forum.com/t/ffmpeg-query/175976/2 "2009-09-23T23:55:14Z")

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Hi Salil,

I use the aws/s3 Ruby gem ([http://amazon.rubyforge.org/](http://amazon.rubyforge.org/)) to download  
the file and then operate on it locally. In my case I’m doing it from  
an EC2 instance so there’s no charge for the file transfer and it is  
pretty fast.

Good luck,  
Michael Slade  
removed\_email\_address@domain.invalid

On Sep 23, 12:33 am, Salil G. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)