[FFmpeg-user] Cutting out part of a video does not work

[Leo Butler]

Bo Berglund <bo.berglund at gmail.com> writes:

> On Sat, 27 Mar 2021 10:06:03 +0100, Peter White <peter.white at posteo.net> wrote:
>
>>> But it all looks the same with the time incrementing at exactly 5 seconds...
>>
>>Looks like someone took extra care to have a static keyframe interval.
>>One can do that. With default codec options x264 won't produce such
>>output though.
>>
>
> The source is using a youtube URL for the streaming video and I use either
> youtube-dl or ffmpeg directly to get it in my scripts.
>
> Is the fact that the times are so exact indication of recoding by Youtube, or is
> the source like that?
> I really have no idea how Youtube video streaming works, I just use YouTube if
> that is the source...
> And I have never published any video on Youtube so I don't know the process.

I know from experience that Youtube automatically transcodes uploaded
videos from unpaid sources (e.g. me). It likely does the same for paid
sources. After all, youtube streams at various resolutions, etc.

Leo