On Wed, Dec 30, 2020 at 6:44 PM Mark Filipak (ffmpeg) <[email protected]> wrote:
> On 12/30/2020 03:35 AM, Paul B Mahol wrote: > > On Wed, Dec 30, 2020 at 6:08 AM Mark Filipak (ffmpeg) < > [email protected]> > > wrote: > > > >> Decimate will drop a repeated frame in each sequence of 5 (=default) > >> frames. I assume the dropped > >> frame can be any 1 of the 5. Is there a way to discover which of the 5 > >> frames it dropped? > >> > > > > -v debug > > May I make a feature request? Could it be added as ... is it called side > data? > > I haven't used side data yet so I'm not quite sure what it is and how it's > used. > > The frame # would need to be readable by follow-on logic inside > expressions. > > This is for processing videos that have previously been telecined, a frame > dropped, and a frame > repeated, in various sequences. The sequence of the video destruction is > not important. What's > important is the phase of the decimation within the modulo-5 in the video > that remains. In 4 of the > 5 cases (phases), it's actually possible to almost completely recover the > original video (prior to > the wrecking). 4 out of 5 cases involve the loss of just 1 field in 10. > The 5th case involves the > total loss of a whole frame and is not recoverable (but since that case > would have an amazing amount > of judder, it's unlikely to be found in the wild). However, I have found > other cases of this video > species in the wild. > Sorry, but you make nonsense entries, very often and as expected. > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
