topic Re: Segmentation fault when adding mfw_mp3encoder to running pipeline in i.MX Processors

Segmentation fault when adding mfw_mp3encoder to running pipeline

Sjoon — Thu, 03 Nov 2011 08:34:11 GMT

In my app I need to record an alsasrc to mp3 files. When the user clicks a button, a new file should be created.

The problem is that I have a segmentation fault when I add an mfw_mp3encoder to my pipeline when it is running. When I replace the mfw_mp3encoder with an wavenc, everything works fine.

Is it possible that this is a bug in the mp3encoder of freescale?

When I debug the app, this is the gdb backtrace of the error:

#0 0x44715718 in mp3e_flush_bitstream () from /usr/lib/lib_mp3_enc_arm9_elinux.so.2.2.0

#1 0x44702268 in mfw_gst_mp3enc_sink_event (pad=<value optimized out>, event=0x43602180) at mfw_gst_mp3enc.c:448

#2 0x401d806c in gst_pad_send_event (pad=0x13a0d0, event=0x43602180) at gstpad.c:4962

#3 0x401d8900 in gst_pad_push_event (pad=0x13a008, event=0x43602180) at gstpad.c:4818

#4 0x41cda44c in gst_base_transform_sink_event (pad=<value optimized out>, event=0x43602180) at gstbasetransform.c:1710

#5 0x401d806c in gst_pad_send_event (pad=0xf1710, event=0x43602180) at gstpad.c:4962

#6 0x401d8900 in gst_pad_push_event (pad=0xf1648, event=0x43602180) at gstpad.c:4818

#7 0x41dd2cbc in gst_queue_loop (pad=<value optimized out>) at gstqueue.c:1094

#8 0x401f82d8 in gst_task_func (task=0xfe278) at gsttask.c:234

#9 0x401f9be8 in default_func (tdata=<value optimized out>, pool=<value optimized out>) at gsttaskpool.c:70

#10 0x40108d74 in g_thread_pool_thread_proxy (data=<value optimized out>) at gthreadpool.c:265

#11 0x401077bc in g_thread_create_proxy (data=0x140058) at gthread.c:635

#12 0x4025d7cc in start_thread () from /lib/libpthread.so.0#13 0x4033cc08 in clone () from /lib/libc.so.6

Re: Segmentation fault when adding mfw_mp3encoder to running pipeline

LyonWang — Thu, 03 Nov 2011 09:18:43 GMT

can you use gst-lauch to establish the pipeline and have a try "gst-launch alsasrc ! mfw_mp3encoder ! filesin location = out.mp3" or can you share your gst-launch pipeline for us to investigate?

BTW: what's the release version of your package and which platform are you using?

Re: Segmentation fault when adding mfw_mp3encoder to running pipeline

Sjoon — Thu, 03 Nov 2011 12:26:10 GMT

I have no problem when using gst-launch to create the pipeline, because there the pipeline is set to playing when the mp3encoder is already added.

In my application, I have a tee on which mp3encoders are added on the fly when the pipeline is already playing.

I'm using the latest mm-codecs (2.0.3) on an imx28.

My pipeline is as follows:

alsasrc ! tee ! queue ! fakesink

When a I start to record, I attach following to the tee:

queue ! "audio/x-raw-int,rate=44100,width=16,height=16,channels=1" ! mfw_mp3encoder ! queue ! filesink

Everything works fine when I start to record before I set the pipeline to playing, but attaching the mp3 encoder when the pipeline is playing gives a segfault.

Re: Segmentation fault when adding mfw_mp3encoder to running pipeline

Sjoon — Mon, 14 Nov 2011 12:18:51 GMT

Anyone?