I may have had my fade.final and fade.inital reversed ;)
I'll let it play-out for a while and see if it's better.
On Thu, Jul 14, 2011 at 10:46 AM, Brandon Casci <[email protected]>wrote:
> disregard my last message. I sent it offlist by mistake, and I may have
> figured it out.
>
> On Thu, Jul 14, 2011 at 9:41 AM, Romain Beauxis <[email protected]>wrote:
>
>> Hi Brandon!
>>
>> Le 13 juillet 2011 23:09, Brandon Casci <[email protected]> a écrit
>> :
>> > I've implemented a custom crossfade based from one of the examples. The
>> > crossfade works great, but metadata updates to icecast always stop after
>> the
>> > second track is played. If I restart liquidsoap metadata updates will
>> > resume, but will stop after the second track is played. Metadata updates
>> > process as usual when I remove the crossfade code. I'm using a trunk
>> version
>> > of liquidsoap that's about 2 or three weeks old. Any theories?
>>
>> Sure!
>> ..
>> > Here is a
>> > snippet of the code:
>> >
>> >
>> > def my_crossfade (~start_next=5.,~fade_in=3.,~fade_out=3.,
>> > ~default=(fun (a,b) -> sequence([a, b])),
>> > ~high=-15., ~medium=-32., ~margin=4.,
>> > ~width=2.,~conservative=false,s)
>> > fade.out = fade.out(type="sin",duration=fade_out)
>> > fade.in = fade.in(type="sin",duration=fade_in)
>> > add = fun (a,b) -> add(normalize=false,[b, a])
>> > log = log(label="smart_crossfade")
>> >
>> > def transition(a,b,ma,mb,sa,sb)
>> >
>> > list.iter(fun(x)-> log(level=4,"Before: #{x}"),ma)
>> > list.iter(fun(x)-> log(level=4,"After : #{x}"),mb)
>> > if ma["crossfade"] == "yes" and mb["crossfade"] == "yes" then
>> > add(fade.initial(type="sin", sb),fade.final(type="sin", sa))
>>
>> This is your problem: add only relays metadata of the first stream.
>> Therefore, you should write:
>> add([fade.final(type="sin", sa),fade.initial(type="sin", sb)])
>>
>> (BTW: it should be an array of sources I think..)
>>
>> > else
>> > log("No transition defined: using default.")
>> > default(sa, sb)
>> > end
>> > end
>> >
>> > smart_cross(width=width, duration=start_next,
>> > conservative=conservative,transition,s)
>> > end
>> >
>> > live_broadcast = input.http(id="live_broadcast_url", buffer = 5.0,
>> > "http://#{live_server}:#{live_port}#{live_mount}";)
>> > live_broadcast = nrj(live_broadcast)
>> > local_playlist = playlist(id = "local_playlist", mode = "normal",
>> > "content.m3u")
>> > local_playlist =
>> >
>> request.dynamic(id="local_playlist",{request.create(get_process_output("#{track_script}
>> > #{channel_id}"))})
>> > local_playlist = rewrite_metadata(
>> > [
>> > ("title", '$(if $(player_title),"$(player_title)","$(title)")'),
>> > ],
>> > local_playlist)
>>
>> I have two minor remarks concerning this: I happen to think this
>> rewrite syntax is rather obscure. I personally prefer to use
>> map_metadata this way:
>>
>> # This will only update by default so
>> # we only need to return the fields that
>> # need to be updated..
>> def update_meta(m) =
>> if m["player_title"] != "" then
>> [("title",m["player_title")]
>> else
>> []
>> end
>> end
>> local_playlist = map_metadata(update_meta,local_playlist)
>>
>> Romain
>>
>
>
>
> --
> =========================================
> Brandon Casci
> Loudcaster
> http://loudcaster.com
> =========================================
>
--
=========================================
Brandon Casci
Loudcaster
http://loudcaster.com
=========================================
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