Thanks Dan, maybe i solved this morning. I wasn't using MLT directly from a lot of time after switching to other projects that OTVA, so my memory lacks :D but i remember this morning the -profile directive ;-)
seems that forcing the dv_pal solved the problems with those clips that before i cannot reproduce using mel command. So: ./melt -profile dv_pal -consumer decklink:0 test_clip1.mp4 works well instead: ./melt -consumer decklink:0 test_clip1.mp4 fires: [consumer decklink] Profile is not compatible with decklink. For me is ok, i solved. Hope this could hel otheres. PS: Dan, i always have to great you for the great job in MLT (and not only :-) ) On 29 March 2018 at 19:43, Dan Dennedy <d...@dennedy.org> wrote: > On Thu, Mar 29, 2018 at 10:26 AM Federico Allegretti <allegf...@gmail.com> > wrote: >> >> hello. >> >> experiemnting with melt by command line. >> >> Trying to exit trough the deckink consumer like that: >> melt -consumer decklink file1 file2 file3 ... >> >> I forced the fact really hard i suppose, in fact some files are 1080, >> some 720, some SD and also i mixed 25fps and 30fps clips :D >> >> Seems decklink do not love this mess :D >> > > decklink consumer does not care about mixing the video attributes such as > this. melt will read the first file, get its attributes, and generate a > mlt_profile from them. Then, the decklink consumer must try to find one of > its preset video modes [1] that matches the profile. I do not know what > happened in your case, but it sounds like perhaps the match failed, and > decklink failed to initialize. > >> >> Is there a trick to "rescale" all of the incoming video iles to a >> common size/framerate? > > > Use the "-profile <profile_name>" option and choose a compatible profile > from the list reported by "melt -query profiles" > >> >> >> upscale to 1080 if HDMI selected trough blackmagic set util or >> downscale to SD if analog SD video output was set? >> >> I tried with resize e rescale filters .. but nothing changed. > > > Scaling is automatic to the profile. Everything is either scaled up or down, > preserving aspect ratio, and adding black bar padding where needed (no > cropping). If you want to center crop to remove black bars you can add > "-attach crop center=1" following every clip you want to apply it to. If you > want full control over scaling/pan/crop, you need to apply a filter such as > affine - see one of the GUI MLT apps for examples of usage. > >> >> >> PS: this set is know by the user and no need to detect it by system >> properties. >> >> Cheers, >> >> Federico > > >> >> -- >> Open TV Architecture project: http://sourceforge.net/projects/otva/ >> >> Messagenet VOIP: 5338759 >> >> YouTube Channel: v1p3r's lab >> >> VIMEO HD videos: http://www.vimeo.com/user1912745/videos >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> Mlt-devel mailing list >> Mlt-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/mlt-devel -- Open TV Architecture project: http://sourceforge.net/projects/otva/ Messagenet VOIP: 5338759 YouTube Channel: v1p3r's lab VIMEO HD videos: http://www.vimeo.com/user1912745/videos ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
