[FFmpeg-user] on frame changes in recode

Xen list at xenhideout.nl
Thu Apr 28 23:31:57 CEST 2016

Moritz Barsnick schreef op 28-04-2016 13:20:
> On Wed, Apr 27, 2016 at 20:17:56 +0000, Xen wrote:
>> > Only if you want support on this mailing list;-)
>> That sounds horrendous.
> Why? The log contains valuable information, such as details about the
> input, messages regarding what ffmpeg is doing in particular, warnings
> and error messages. And, e.g. in your case, whether ffmpeg is dropping
> or adding frames.

I was joking. The horrendous part referred to getting support.

>> Well I think this is about the output of the
>> first attempt (to mp4):
> You shouldn't remove anything, neither your actual command line nor the
> banner. (Ton of repetetive messages in the middle could be omitted if
> too long.

There's hardly anything left I think you are nitpicking now.

I think I already supplied the command line :-/.

ffmpeg -i input.mp4 -ss 00:5:50.800 -vcodec libx264 output.mp4

Basically there is no other information unless you want the number of 
spaces typed on average every day on my system.

I don't have that data :p.

It's very simple:

* whether I use gstreamer (pitivi) or avidemux or ffmpeg
* the output always has the 2nd frame duplicated, and the "scene" 
prolonged from 11 frames to 12 frames.

I mean I can supply the files as well but I can probably suffice with 2 
youtube-dl commands since they are both on youtube now.

This is the download:

youtube-dl -f 22 https://www.youtube.com/watch?v=N0wdB-Vt-ZY

Here is the finished product:

(rather unfinished :p);

youtube-dl -f 22 https://www.youtube.com/watch?v=DFhFD-UlwRc

You can use any player (e.g. VLC) that can do frame-by-frame to see how 
it is constructed.

I mean, what more do you want?

You can easily reproduce it given above command.

All of this is unnecessary, but if it makes you happy, here you have it 

Maybe you think I'm nitpicking but I'm just concerned that the simplest 
of edit operations result in this corruption.


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