[FFmpeg-user] Seeking for a method to remove sections of a video

[Carlos E. R.]

On 2017-06-19 20:03, Tom Horsley wrote:
> On Mon, 19 Jun 2017 13:17:16 -0400
> Eric Wilde wrote:
> 
>> It would be great if you figured out a better solution.
> 
> My solution works great on linux, it just takes forever
> and involves more manual work than is optimal :-).
> My algorithm:
> 
> 1. One quick encoding to add the six decimal point
> timestamps to the video as a text overlay.

Oh.

> 2. Play that video in mencoder using pause, backup,
> single step keycodes to sneak up on the exact timestamp
> I want. Read the screen and copy the timestamps to a file.
> 
> 3. A script that takes my timestamps and uses -ss and -t
> options to slowly and painfully start from the beginning
> of the file, reach the exact timestamp I want and transcode
> a chunk of video of the right duration. (Trying to speed
> this up by seeking to a keyframe that preceeds the
> timestamp never seems to work right, I have to go through
> the video linearly from the beginning).
> 
> 4. Then a script that does a "concat" to merge all the
> chunks into the final video.

Yes...

> Any shortcuts I tried never worked. Audio would get out
> of sync, etc. The only part that consumes my time
> is copying the timecodes into a file. Everything else
> is automated and just involves waiting for the computer
> to finish :-).

Well, you need to do first one encode run to add the timestamps...

Which is an issue with my recordings, the timestamps in the source are
faulty, I have to use "-copyts".

-- 
Cheers / Saludos,

		Carlos E. R.
		(from 42.2 x86_64 "Malachite" at Telcontar)

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