[FFmpeg-user] ffprobe -show_frames values

[Anatol]

Thanks Werner.
I believe that u'll find out that disabling scene cut detection might cause
a significant quality reduction.
Therefore, activating together the forced keyframes and the scene cut
detection is probably the most reasonable compromise.

On Wed, May 13, 2015 at 12:47 PM, Werner Robitza <werner.robitza at gmail.com>
wrote:

> On Wed, May 13, 2015 at 7:07 AM, Anatol <anatol2002 at gmail.com> wrote:
> > Werner, can you please shortly explain the no-scenecut issue.
> > Without scenecut detection, if such event occurs in the middle of the
> GOP,
> > as it usually does, the video quality till the end of the GOP will be
> > rather compromised. It appears as a 'breathing effect'.
> > It is mostly stands out when a high quality video played on a large
> screen.
> > Is there a way to avoid such effects without scene cut detection?
>
> I haven't seen this in real life but we had pretty short GOPs in our
> tests. Could it be that the bitrate is generally too low then?
>
> Perhaps the qpstep value can be increased to allow the encoder to
> choose a lower QP for the non-I frames following a scene cut.
>
> I still have to test the force_key_frames method to see whether the
> quality is really noticeably worse compared to disabling scene-cut
> detection altogether.
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