Re: [Mlt-devel] mlt_playlist_append rtmp live stream

[Evalds U. <ev...@as...>]

Thank you Dan for answers.


To clear up some of things:

1. I found out that if I set mlt_playlists parent producer "eof" behavior as "loop" and then put live stream in mlt_playlist it will work as expected when its time to play comes :) 

In this application I am not using melt, but just mlt framework & C/C++. Is it possible to see "avformat-novalidate" service using only mlt_properties on mlt_producer?


2. About eof live stream (I was thinking when it disconnects). 

What function/property should I use to "poll clip_info on the playlist API"?


3. Thank you, I didn't think that I could use mlt_producer_set_speed as pause/play function. :)

4. I have two more questions (hopefully thats it :) ) 
Is it possible to get transitions (mlt_playlist_mix) between live stream producers and file based producers? In my tests previous clip freezes and then just jumps to live stream without transition.

5. What is the correct way of releasing clips in mlt_playlist if I use it as double ended queue - appending new clips at the end and dropping old ones at the end.
if I just use mlt_playlist_remove I see from memory logs that it might not release all memory used by clip's producer. 

//Evalds


On Sep 4, 2012, at 11:19 PM, Dan Dennedy wrote:

> On Tue, Sep 4, 2012 at 10:48 AM, Evalds Urtans <ev...@as...> wrote:
>> Hello,
>> 
>> 1. Can anyone tell if it is possible to add rtmp live stream (producer of "loader") to mlt_playlist? At the moment after adding it to playlist everything freezes on SDL, but some kind of processes and memory is active till in background
>> 
> 
> You may need to use the "avformat-novalidate" service with a live
> stream in a playlist. Normally, a producer must check its input so it
> can fail and return an error to the app, but that variant of the
> avformat producer bypasses the validation. If using xml, then you will
> change the mlt_service property. If using command line, then preface
> the URL with "avformat-novalidate:"  Try this "melt rtmp://...
> -consumer xml:rtmp.mlt" Then, edit the XML's mlt_service. Now, try to
> use rtmp.mlt as a clip in a playlist.
> 
>> 2. Is ti possible to detect when mlt_producer of live stream has needed (eof)? What function should I use?
>> 
> 
> When does a live stream end? Anyways, you can control the duration of
> play of a live stream with length and out properties. As for
> detection, you either need to poll clip_info on the playlist API and
> detect when the index/producer has changed, or you can use the new
> playlist event "producer-next" that I added only days ago. For that,
> you need to learn how to listen for events by supplying a callback
> function (search source code for "mlt_events_listen" for examples if
> you are using C.
> 
>> 3. How to pause & resume mlt_playlist and/or mlt_producer?
> 
> mlt_producer_set_speed() 0 for pause, 1.0 for normal. You should see
> the source of melt.c if you are using C and want to learn more; it is
> not that long. If you are using another language, then it is pretty
> easy to map the C functions to your language once you understand the
> convention. The language bindings are very thin so you can understand
> the rules and adapt the C API docs or examples.
> 
>> Thank You!
>> 
>> //Evalds Urtans,
>> www.asketic.lv
>> 
> 
> -- 
> +-DRD-+