[FFmpeg-user] How do I create an ffmpeg command line?

Mark Filipak markfilipak.windows+ffmpeg at gmail.com
Sun Mar 1 12:52:02 EET 2020

On 03/01/2020 05:39 AM, Michael Koch wrote:
> Am 01.03.2020 um 11:30 schrieb Mark Filipak:
>>> Then please test the following (assuming your input is actually 
>>> telecined, if it is not the command is slow and makes little sense. 
>>> Remember that soft-telecined is progressive and not telecined from 
>>> FFmpeg‘s point of view):
>> Not telecined from any point of view, Carl.
>> For soft-telecined video, I just want to remux to MKV. For NTSC 
>> hard-telecined sources, I want to detelecine (fieldmatch & decimate) 
>> to 24p and then wrap the result in MKV.
>>> $ ffmpeg -i input -vf fieldmatch out.mov
>> I assume that '-vf' is the same as '-filter:v'? What about 'decimate'? 
>> Do I just do this?
>> 'ffmpeg -i <infile> -vf fieldmatch decimate <outfile>
> Two or more filters in the filter chain must be separated by a comma, 
> and it's a good idea to enclose the filter chain in double quotes:
> ffmpeg -i <infile> -vf "fieldmatch,decimate" <outfile>
>> Again, I apologize for asking such seemingly primitive questions. I'm 
>> just getting so weary that I may not be thinking straight.
>> Is <outfile> always the last element in the line
> yes.

Thanks, Michael,

I do have your pdf-book. I like it. You know, people are pretty smart, 
and they're really sensitive to patterns (by evolutionary selection?). 
In my documentation I've found that, rather than explain, it works 
wonderfully to 'show': to list command after command after command 
leaving it up to the reader to see the patterns, and then, not explain 
anything beyond a few comment words following each command. It works, 
and it winds up being more efficient (and more memorable).


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