GStreamer issues.

[Mike Wey via Digitalmars-d-learn]

On 22-08-17 02:13, Johnson wrote:
> I can't get the example to work(although slightly modified).
> 
> The installed version of GStreamer is 1.12.2
> The file is: D:\temp\test.ogg
> Loading
> Setting to PLAYING.
> Running.
>> XError: Could not demultiplex stream. dbug: gstoggdemux.c(4418): 
>> gst_ogg_demux_find_chains (): 
>> /GstPipeline:audio-player/GstOggDemux:ogg-parser:
> can't get first chain
> 
> Actually I was getting a much worse error before ;/ I can't remember it 
> now.
> 
> 
> The installed version of GStreamer is 1.12.2
> The file is: D:\temp\test2.wav
> Loading
> Setting to PLAYING.
> Running.
>> XError: Internal data stream error. dbug: gstwavparse.c(2249): 
>> gst_wavparse_loop (): /GstPipeline:audio-player/GstWavParse:wav-parser:
> streaming stopped, reason not-linked (-1)
> 
> Basically all I did was change the sink:
> 
>      sink = ElementFactory.make("autoaudiosink", "auto-output");
> 
> So it I could get past the error about alsa. I think the last name 
> doesn't matter?
> 
> I downloaded the gstreamer binaries from their site, had some issues 
> with a few of the dll's complaining about gxx errors, I removed 
> them(h264, soundtouch, tag).
> 
> 
> For the wav I changed
>          //parser = ElementFactory.make("oggdemux", "ogg-parser");
>          //decoder = ElementFactory.make("vorbisdec", "vorbis-decoder");
>          parser = ElementFactory.make("wavparse", "wav-parser");
>          decoder = ElementFactory.make("audioconvert", "wav-decoder");
> 
> 
> which, is all i could find on line, I don't know if it's right at all.
> 
> 
> Ultimately I want to be able to read somewhat arbitrary audio 
> formats(most common at least), get the raw channel data(samples for each 
> channel), play/pause/stop with good accuracy(no latency or low 
> latency(<20ms), possibly do some pitch shifting and basic mixing(EQ, 
> limiting, panning, etc), and eventually play some videos.
> 
> Is GstreamerD going to be useful for this or so I look in to using 
> ffmpeg directly and do some of the stuff(e.g., eq) myself?
> 
> Thanks.

The Gstreamer demo should use an `playbin` instead of explicitly setting 
the pipeline, Like this: 
https://github.com/gtkd-developers/GtkD/blob/master/demos/gstreamer/helloworld/gstreamer_helloworld.d

This way gstreamer will detect the file type, i don't know if it helps 
with the errors.

-- 
Mike Wey