On Sat, Jun 11, 2022 at 12:02 PM Michael Koch <[email protected]> wrote:
> Am 11.06.2022 um 11:46 schrieb Nicolas George: > > Michael Koch (12022-06-11): > >> I always get this error message: > >> Stream specifier '' in filtergraph description [0][1]concat=n=2:a=1 > matches > >> no streams. > > Where did you find this "[number]" syntax, and has it ever worked for > > you? > > yes, it works after I added v=0. Isn't this the normal syntax to specify > the two inputs of the concat filter? In this case [0][1] could be > omitted because there are only these two inputs. [0:0][1:0] does also work. > > You should really use lavfi-preview, its GUI for libavfilter. > Michael > > _______________________________________________ > 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".
