[gst-devel] Help needed resolving pipeline error.

[Steven Stromer]

Stefan Kost wrote:
> Hi Steven,
> 
> okay, get ready for a dose of gstreamer debug logs :)
> 
> This fragemnt is enought to test if the m4a decoding works.
> GST_DEBUG="*:2" gst-launch-0.10 filesrc location=foo.m4a ! decodebin ! fakesink
> 
> If that works, you should also be able to play it.
> GST_DEBUG="*:2" gst-launch-0.10 playbin uri=file://$PWD/foo.m4a
> 
> (the GST_DEBUG="*:2" displays warnings from all log domains)
> Now if that works as well try this again:
> GST_DEBUG="*:2" gst-launch-0.10 filesrc location=foo.m4a ! decodebin !
> audioconvert ! audioresample ! lame ! filesink location=foo.mp3
> 
> any warnings?

Thank you so much for assistance. First test fails miserably with:

0:00:00.193359000 24259 0x96d0a08 WARN              GST_PADS 
gstpad.c:674:gst_pad_set_active: Failed to activate pad '':sink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
0:00:00.212694000 24259 0x96ef750 WARN               basesrc 
gstbasesrc.c:1614:gst_base_src_loop:<filesrc0> error: Internal data flow 
error.
0:00:00.213020000 24259 0x96ef750 WARN               basesrc 
gstbasesrc.c:1614:gst_base_src_loop:<filesrc0> error: streaming task 
paused, reason not-linked (-1)
ERROR: from element /pipeline0/filesrc0: Internal data flow error.
Additional debug info:
gstbasesrc.c(1614): gst_base_src_loop (): /pipeline0/filesrc0:
streaming task paused, reason not-linked (-1)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
FREEING pipeline ...

> 
> Stefan
> 
> Steven Stromer wrote:
>>> On Sun, 2007-07-22 at 11:45 -0400, Steven Stromer wrote:
>>>
>>>> When executing under Fedora 6:
>>>>
>>>> gst-launch filesrc location=\"$M4A_SONG\" ! decodebin ! \ lame 
>>>> preset=1001 quality=0 ! filesink location=\"$MP3_SONG\" ;
>>>>
>>>> I am getting the following errors:
>>>>
>>>> Setting pipeline to PAUSED ...
>>>> Pipeline is PREROLLING ...
>>>> ERROR: from element /pipeline0/filesrc0: Internal data flow error.
>>>> Additional debug info:
>>>> gstbasesrc.c(1614): gst_base_src_loop (): /pipeline0/filesrc0:
>>>> streaming task paused, reason not-linked (-1)
>>>> ERROR: pipeline doesn't want to preroll.
>>> Try something like:
>>>
>>>  gst-launch-0.10 filesrc location=foo.m4a ! decodebin ! audioconvert !
>>> audioresample ! lame ! filesink location=foo.mp3
>>>
>> Tim, thanks for responding. It is much appreciated. Unfortunately, this 
>> generates the exact same error. I should note that the foo.mp3 file is 
>> created when command is executed, but the file contains no data. I've 
>> just been deleting the empty file before each subsequent test. Also, 
>> I've triple checked my filesrc and filesink paths; they are correct. 
>> I've tried with licensed and unlicensed music; same error.
>>
>>>> Note that good and ugly are being retrieved from a different repo than 
>>>> all of the other packages. These aren't available from Redhat's Fedora 
>>>> repos. This is probably due to the fact that Redhat doesn't like to 
>>>> touch anything that might be either unstable or potentiallly litigeous. 
>>>> I could see how these errors might be a result of mixing plugin 
>>>> packages, but I'm not sure.
>>> The error means that streaming stopped because some point in the
>>> pipeline wasn't linked to anything else. In this case, it's probably the
>>> decoder automatically plugged by decodebin that's not linked to lame,
>>> probably because lame's input format/caps are not compatible with the
>>> decoder's output format/caps (gst-launch doesn't give you an error right
>>> away because decodebin has sometimes pads, so it's possible that a
>>> compatible pad is created later on).
>>>
>>>
>>>> One more thing. When using lame in a gstreamer pipe, where would I find 
>>>> docs on the available arguments? The formatting and options seem 
>>>> different in this usage from the standard options described in the lame 
>>>> man file.
>>> gst-inspect-0.10 lame
>> This is very helpful. Thanks!
>>
>>> Cheers
>>>  -Tim