Anyone have any suggestions to help me please? Bertrand
Le lun. 2 mai 2022 à 13:15, Bertrand Lagrange <bertr...@b-la.fr> a écrit : > Hello, > > I'am a liquidsoap user for a few years, i using it for my web radio. I had > started at the very beginning by writing my own system which provided a > dynamic playlist for Liquidsoap, but now I use Azuracast with a custom > Liquidsoap script. > > Azuracast having switched to liquidsoap 2, I therefore adapted my script > by following the recommendations ( > https://www.liquidsoap.info/doc-2.0.4/migrating.html). > > But there's a part that I don't understand. That's why I'm asking for your > help. > > My radio script is designed to insert an ad twice an hour. I add to this > insert an entry and exit transition containing a very short sound which > makes it possible to signalize to the listeners the "dropout" on the ad... > > Here is an excerpt from the script: > > #################################################################### > # One track by predicate true > # https://github.com/savonet/liquidsoap/issues/1067 > def predicate.activates(~init=false, p) > last = ref(not init) > fun () -> begin > cur = p() > ans = (not !last) and cur > last := cur > ans > end > end > > def pre_advert_trans(virgule, a ,b) > log(label="pre_advert_trans", "Advert In") > > def add_transition_length(_) = > [("liq_transition_length","10.")] > end > > transition = > add(normalize=false, > [ sequence([blank(duration=0.5), fade.in(duration=1.,virgule), b]), > sequence([fade.out(duration=3.,a),blank()]) ]) > > map_first_track(map_metadata(add_transition_length),transition) > end > > def post_advert_trans(virgule, a ,b) > log(label="post_advert_trans", "Advert Out") > > def add_transition_length(_) = > [("liq_transition_length","10.")] > end > > transition = > add(normalize=false, > [ sequence([blank(duration=5.1), virgule, b]), > sequence([fade.out(type="sin",duration=5.0, a),blank()]) ]) > > map_first_track(map_metadata(add_transition_length),transition) > end > > radio = > switch(transitions=[pre_advert_trans(playlist_decrochage_in),post_advert_trans(playlist_decrochage_out)], > [ > (predicate.activates({ 12m-18m or 42m-48m }), playlist_advert), > ({ true }, radio) > ]) > #################################################################### > > I had obtained the expected result, but with the passage in v2 I have the > following error: > > At /tmp/liquidsoap.liq, line 248, char 27-112: > radio = > switch(transitions=[pre_advert_trans(playlist_decrochage_in),post_advert_trans(playlist_decrochage_out)], > > Error 5: this value has type > [(_, _.{id : _}, ...) -> _] > but it should be a subtype of > [(_, source(audio=pcm(?A), video=?internal(?B), midi=?internal(?C)), > ...) -> > _] > > > I understood that it was the transition on the switch that poses the > problem but I have trouble seeing how I should rewrite that. > > Thanks in advance for your help. > > Bertrand > > >
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