[FFmpeg-user] -t option is ignored

Tim Nicholson nichot20 at yahoo.com
Mon Mar 26 16:30:55 CEST 2012

On 26/03/12 14:58, Rodney Baker wrote:
> On Mon, 26 Mar 2012 21:31:44 Martin G wrote:
>> FFMPEG users,
>> I am trying to edit a subclip from a larger movie. I just want a two
>> minute section.
>> This is the command I have been working with:
>> ffmpeg -i input.avi -ss 01:05:16 -t 120 -vcodec copy -acodec copy
>> output.avi
> In my experience it is faster to put -ss and -t options before -i, otherwise 
> ffmpeg parses the whole file up to -ss before starting conversion. With -ss 
> first, it begins reading at that point (or the closest i-frame or reference 
> frame). 

faster, yes, but sometimes less accurate.....

> Unless, of course, the behaviour has changed in recent versions but I have 
> developed the habit of always putting the seek and duration options first.
> [...]


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