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Problem with flacdec and ismd_audio_sink

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Raymond Frost

Problem with flacdec and ismd_audio_sink

Hi,

Im working on a intel CE4150 board with gstreamer
and i have issues of extremely low volume whenever i use flacdec along with ismd_audio_sink
basically my setup is
filesrc ! queue ! flacdec ! audioconvert ! ismd_audio_sink

i have no issues when using other combinations
such as
filesrc ! queue ! flacdec ! audioconvert ! alsasink
[same flac playback with a usb uDAC]
or
filesrc ! queue ! oggparse ! vorbsdec ! audioconvert ! ismd_audio_sink
[same device setup for vorbis playback]

anybody can shed some light as in what did i miss in setting up a flac pipeline?

Thanks in advance

Tim-Philipp Müller-2

Re: Problem with flacdec and ismd_audio_sink

On Tue, 2010-12-07 at 02:49 -0800, Raymond Frost wrote:

> Im working on a intel CE4150 board with gstreamer
> and i have issues of extremely low volume whenever i use flacdec along with
> ismd_audio_sink. Basically my setup is
>
> filesrc ! queue ! flacdec ! audioconvert ! ismd_audio_sink
>
> i have no issues when using other combinations such as (snip)

So what format is being negotiated between flacdec and your sink? (pass
-v to gst-launch)

What if you use e.g.

... ! flacdec ! audioconvert ! \
audio/x-raw-int,width=16,depth=16,channels=2 ! \
ismd_audio_sink

for example (try other combinations too, maybe the same as are used with
the other formats).

Cheers
-Tim

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Raymond Frost

Re: Problem with flacdec and ismd_audio_sink

Tim-Philipp Müller-2 wrote

On Tue, 2010-12-07 at 02:49 -0800, Raymond Frost wrote:

> Im working on a intel CE4150 board with gstreamer
> and i have issues of extremely low volume whenever i use flacdec along with
> ismd_audio_sink. Basically my setup is
>
> filesrc ! queue ! flacdec ! audioconvert ! ismd_audio_sink
>
> i have no issues when using other combinations such as (snip)

So what format is being negotiated between flacdec and your sink? (pass
-v to gst-launch)

What if you use e.g.

... ! flacdec ! audioconvert ! \
audio/x-raw-int,width=16,depth=16,channels=2 ! \
ismd_audio_sink

for example (try other combinations too, maybe the same as are used with
the other formats).

Cheers
-Tim

well,
i have been trying something similar before,
it goes something like the codes below,
*note that I'm using C

audio_caps = gst_caps_new_simple("audio/x-raw-int",
"width", G_TYPE_INT, 16,
"rate", G_TYPE_INT, 48000,
"channels", G_TYPE_INT, 2,
"endianness", G_TYPE_INT, 1234,
"depth", G_TYPE_INT, 24,
"signed", G_TYPE_BOOLEAN, true,
NULL);
g_assert(audio_caps);
gst_pad_set_caps(audioconvert_src_pad, audio_caps);
gst_caps_unref(audio_caps);

I run this before linking up the pipeline,
and so far i have tried numerous setting combinations,
so far i have no positive improvements yet.

so far only by replacing the audiosink to alsasink,
i can get good volume with the same setting on all the other part of the pipeline.
i guess this part of setting could be the only connection to this problem.

Josep Torra

Re: Problem with flacdec and ismd_audio_sink

On 12/8/10 10:35 AM, Raymond Frost wrote:

>
>
> Tim-Philipp Müller-2 wrote:
>>
>> On Tue, 2010-12-07 at 02:49 -0800, Raymond Frost wrote:
>>
>>> Im working on a intel CE4150 board with gstreamer
>>> and i have issues of extremely low volume whenever i use flacdec along
>>> with
>>> ismd_audio_sink. Basically my setup is
>>>
>>> filesrc ! queue ! flacdec ! audioconvert ! ismd_audio_sink
>>>
>>> i have no issues when using other combinations such as (snip)
>>
>> So what format is being negotiated between flacdec and your sink? (pass
>> -v to gst-launch)
>>
>> What if you use e.g.
>>
>> ... ! flacdec ! audioconvert ! \
>> audio/x-raw-int,width=16,depth=16,channels=2 ! \
>> ismd_audio_sink
>>
>> for example (try other combinations too, maybe the same as are used with
>> the other formats).
>>
>> Cheers
>> -Tim
>>
>>
>
> well,
> i have been trying something similar before,
> it goes something like the codes below,
> *note that I'm using C
>
> audio_caps = gst_caps_new_simple("audio/x-raw-int",
> "width", G_TYPE_INT, 16,
> "rate", G_TYPE_INT, 48000,
> "channels", G_TYPE_INT, 2,
> "endianness", G_TYPE_INT, 1234,
> "depth", G_TYPE_INT, 24,
> "signed", G_TYPE_BOOLEAN, true,
> NULL);
> g_assert(audio_caps);
> gst_pad_set_caps(audioconvert_src_pad, audio_caps);
> gst_caps_unref(audio_caps);
>
>
>
> I run this before linking up the pipeline,
> and so far i have tried numerous setting combinations,
> so far i have no positive improvements yet.
>
> so far only by replacing the audiosink to alsasink,
> i can get good volume with the same setting on all the other part of the
> pipeline.
> i guess this part of setting could be the only connection to this problem.
>

Having depth > width doesn't make sense.

Try with 16 bits on both.

Cheers
Josep

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