I think the bars on the left and right is called Pillarbox and it happens when trying to maintain AR of a PAL/NTSC on widescreen.
On Fri, Apr 15, 2016 at 9:07 AM, Nicholas Robbins < [email protected]> wrote: > > On Thursday, April 14, 2016 1:15 PM, Carl Eugen Hoyos <[email protected]> > wrote: > > > > Nicholas Robbins writes: > > > >> > But if the input is letterboxed, you should definitely crop > >> > first. > >> > >> The input definitely appears to be letterboxed. Is there some > >> difference between "appearing" to be letterboxed and actually > >> being letterboxed that I should check for? > > > > Please remember that I live in PAL country and my mother tongue > > is not English: Does "letterboxed" mean black bars either left > > and right or above and below the actual image? > > If yes, what is the difference between "apparent black bars" > > and "actual black bars"? > > > > I think we can agree that the black bars do not help fieldmatch > > but take time to process and should therefore be removed as > > early in the process as possible. > > > > Carl Eugen > > > "letterboxed" means black bars top and bottom. I didn't know if there > might be a difference or not. Maybe there is a way to encode the black bars > in the mpeg video stream besides just black pixels. I didn't know. Seems > like its just black pixels. > > I thought before would be better, but wanted to make sure that the crop > wouldn't mess us the fieldmatch, like a scale would for instance. > > Thanks for your advice. > > -Nick > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
