Am Sa., 25. Apr. 2020 um 04:20 Uhr schrieb Mark Filipak <markfilipak.windows+ffm...@gmail.com>: > > On 04/24/2020 01:22 PM, Carl Eugen Hoyos wrote: > > > > > >> Am 24.04.2020 um 11:10 schrieb Mark Filipak > >> <markfilipak.windows+ffm...@gmail.com>: > >> > >> I've been told that, for soft telecined video the decoder is fully > >> compliant > >> and therefore outputs 30fps > > > > (“fps” is highly ambiguous in this sentence.)
The decoder is "compliant" in the sense that the stream it outputs for soft-telecined input has a time base of 30000/1001, the output has 24000/1001 "frames per second" though. > > This is not correct. > > I believe I told you some time ago that this is not how the decoder behaves. > > I beg your pardon, Carl Eugen. I thought you said that the decoders are > fully compliant and therefore produce interlaced fields. I am quite sure I wrote the opposite several times as replies to your mails. Note that FFmpeg cannot produce "fields" because it cannot deal with devices that know what a "field" is. (Just as there are "interlacing" filters that you would call differently if it were your decision, we also decided to name some of the filters that deal with frames "field"-filters because this allows understanding the filters' purpose for everybody except broadcast and video engineers like you.) > > I believe such a behaviour would not make sense for FFmpeg (because > > you cannot connect FFmpeg’s output to an NTSC CRT). The telecine filter > > would not work at all if above were the case. > > Or in other words: FFmpeg outputs approximately 24 frames per second for > > typical soft-telecined program streams. > > The only thing FFmpeg does to be “compliant” is to forward the correct time > > base. > > By "correct time base" you mean 24/1.001, correct? lol, no Carl Eugen _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
