Re: [FFmpeg-user] Starting to copy takes long

2017-03-29 Thread Cecil Westerhof 
On Wednesday 29 Mar 2017 09:34 CEST, Carl Eugen Hoyos wrote:

> 2017-03-29 4:17 GMT+02:00 Cecil Westerhof :
>
>> You are right. But it was only a temporary hack, because
>> what I really wanted was:
>> ffmpeg -ss 16:28 -t 5 -i input.mov output%03d.jpg
>
> Just like to note that the input option "-t" is supposed to
> work but sometimes has side-effects (or fails), the safe
> way to do it is:
> $ ffmpeg -ss x -i input -t y out
> unless you need the input option.

In this case it worked, but when I need it again, I will put it after
the input.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: [FFmpeg-user] Starting to copy takes long

2017-03-29 Thread Carl Eugen Hoyos 
2017-03-29 4:17 GMT+02:00 Cecil Westerhof :

> You are right. But it was only a temporary hack, because
> what I really wanted was:
> ffmpeg -ss 16:28 -t 5 -i input.mov output%03d.jpg

Just like to note that the input option "-t" is supposed to
work but sometimes has side-effects (or fails), the safe
way to do it is:
$ ffmpeg -ss x -i input -t y out
unless you need the input option.

Carl Eugen
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Re: [FFmpeg-user] Starting to copy takes long

2017-03-28 Thread Cecil Westerhof 
On Wednesday 29 Mar 2017 02:04 CEST, Cley Faye wrote:

> 2017-03-29 1:54 GMT+02:00 Cecil Westerhof :
>
>> I want to copy a little bit of a video. I do this with:
>> ffmpeg -i input.mov -ss 16:28 -t 5 output.mov
>>
>> But it takes about 2:20 before the copying starts. Is this normal?
>>
>
> ​Try moving the -ss part before your input. -ss before an input use
> forward (if possible fast forward) on your source, while before an
> output it means processing everything before, then start using the
> output after the given time.

That was the problem. Thanks.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: [FFmpeg-user] Starting to copy takes long

2017-03-28 Thread James Darnley 
On 2017-03-29 02:04, Cley Faye wrote:
> 2017-03-29 1:54 GMT+02:00 Cecil Westerhof :
> 
>> I want to copy a little bit of a video. I do this with:
>> ffmpeg -i input.mov -ss 16:28 -t 5 output.mov
>>
>> But it takes about 2:20 before the copying starts. Is this normal?
>>
> 
> ​Try moving the -ss part before your input. -ss before an input use forward
> (if possible fast forward) on your source, while before an output it means
> processing everything before, then start using the output after the given
> time.

Furthermore ffmpeg is not copying anything there.  You did not tell
ffmpeg to copy.  It is encoding with (probably rubbish) defaults.




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Re: [FFmpeg-user] Starting to copy takes long

2017-03-28 Thread Cley Faye 
2017-03-29 1:54 GMT+02:00 Cecil Westerhof :

> I want to copy a little bit of a video. I do this with:
> ffmpeg -i input.mov -ss 16:28 -t 5 output.mov
>
> But it takes about 2:20 before the copying starts. Is this normal?
>

​Try moving the -ss part before your input. -ss before an input use forward
(if possible fast forward) on your source, while before an output it means
processing everything before, then start using the output after the given
time.
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