Am Mo., 27. Jan. 2020 um 23:03 Uhr schrieb William Caulfield via ffmpeg-user <[email protected]>: > > On Sun, Jan 26, 2020 at 7:28 PM Hans Carlson <[email protected]> wrote: > > > On Mon, 27 Jan 2020, Carl Eugen Hoyos wrote: > > > > > Am Mo., 27. Jan. 2020 um 03:27 Uhr schrieb Hans Carlson <[email protected] > > >: > > > > > >> Is 16/9 the correct value for setdar since that's what I want it to end > > >> up to be? > > > > > > Apparently not but it is what you told us you'd like. (I did not > > > calculate myself) > > > > OK... perhaps I don't know WHAT dar I want. I plan to concat this video > > to some others (using concat protocol or demuxer) and the other videos > > have a DAR of 16:9, eg: > > > > Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top first), > > 720x480 [SAR 32:27 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k > > tbn, 59.94 tbc > > > > So, based on that, I assumed it would be a good idea to match the aspect > > ration (720x480) and the DAR. > > > > If the DAR value doesn't matter when concat'ing multiple files, then I > > just > > want the video to LOOK correct. > > > > How do I calculate the correct dar (and/or sar) values to use? > > _______________________________________________ > > > > > Your larger issues are all coming from the anamorphic aspects of PAL and > NTSC. They are not "right" to begin with, but will play back at the correct > resolution using DAR. You need to take the original PAL 720x576 4:3, trim > it to 704x416, then resize it to 720x480 with 16/9 DAR. Then you can > combine the two with the 16/9 DAR and they will play back correctly. (This > is highly over-simplified without doing the math).
Hans wants to crop black bars so above will not (completely) work for him... Carl Eugen _______________________________________________ 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".
