[FFmpeg-user] ffprobe -show_frames values

Werner Robitza werner.robitza at gmail.com
Wed May 13 11:47:35 CEST 2015

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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