On 5 May 2018 at 00:29, RS <richard...@zoho.com> wrote: > On 04/05/18 23:50, Dave Lambley wrote: > >> >> They would remove the interlace to bring the framerate to 50fps before >> encoding. There are many methods of doing so, ffmpeg can do this for >> example. >> > This article > > https://superuser.com/questions/253691/how-to-convert-108050i-72050p-using-ffmpeg > > says, "Just like interlacing progressive content divides each frame into 2 > fields, thus doubling the frame rate, the common method of deinterlacing is > to combine each 2 fields into 1 frame, which reduces the rate by 2, thus > taking 50 into 25fps. You can of course double each final frame, but that > does not provide any benefit." > > Do you disagree?
eg., https://ffmpeg.org/ffmpeg-filters.html#bwdif (and other) filters can give you good quality 50fps frames, without duplication, from interlaced 25fps video. I have no idea what the BBC use, but they have plenty of choice. Dave _______________________________________________ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
