[FFmpeg-user] Removing parts of a video using the select filter

[Simon van Bernem]

My specific usecase is removing multiple parts
 
of a video. So e.g. I want to "remove the part
 
from 0:10 to 0:15 and the part from 1:15 to 4:10 and the part from 10:00 to the end".
 
How would that look like with this approach?
 
Can you have multiple -ss and -to pairs?
 
Can you express to discard a section, not keep
 
it?
 

 
Regards,
 
Simon
 

 

 
 
 
 
>  
> Am 09.01.2022 in 12:39, Stephen Liu via ffmpeg-user  <ffmpeg-user at ffmpeg.org>  schrieb:
>  
>  
>  Hi, 
> I run following command on Terminal to trim a section of the video (for VCD video):- 
> $ ffmpeg -i imput.VOB -target pal-vcd -ss 00:02:10 -to 00:03:18 -c:v copy -c:a copy output.VOB 
>
> -ss starting time (hrs:min:sec) 
> -to stop time (hrs:min:sec) 
>
> This command line works for me seamlessly. 
>
> Regards 
>
>  On Sunday, January 9, 2022, 06:43:39 PM GMT+8, MacFH - C E Macfarlane - News  <news at macfh.co.uk>  wrote: 
>  
>  On 08/01/2022 23:43, amindfv--- via ffmpeg-user wrote: 
> >  
> >  On Sat, Jan 08, 2022 at 08:20:46PM +0000, MacFH - C E Macfarlane - News wrote: 
> >>  
> >>  To select parts of a video, I use ... 
> >>  
> >>  FFMPEG -ss  <start-time>  -i  <input>  -codec copy -to  <end>   <output>  
> >>  
> >>  ... however it's tedious, because with this method the video will only break 
> >>  at certain points between compression units (can't remember the proper 
> >>  terminology), and it can take some experimentation to find the precise 
> >>  timing of these to get the audio right as well, and often, because of the 
> >>  way the compression works, the first extracted frame is often an unwanted 
> >>  last frame of a previous scene. 
> >>  
> >>  I have long lamented that FFMPEG doesn't make this both easier and to allow 
> >>  greater resolution, if necessary recreating the start and end compression 
> >>  units to get the exact timing wanted. 
> >  
> >  If you get rid of the "-codec copy" you can have any precision you'd like. 
>
> But the entire video will be re-encoded, which is undesirable because, 
> as the codecs use lossy compression, there will be further degradation 
> of the entire video clip just gain some precision at each end. 
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