Bug 99489 – can't playback streams mux'd with mplexlo

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Bug 99489 - can't playback streams mux'd with mplexlo


Summary:	can't playback streams mux'd with mplexlo


Status:	RESOLVED FIXED

Product:	GStreamer
Classification:	Platform
Component:	gst-plugins
Version:	git master
Hardware:	Other other

Importance:	Low normal
Target Milestone:	0.4.0
Assigned To:	GStreamer Maintainers
QA Contact:	GStreamer Maintainers

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2002-11-25 10:47 UTC by Joshua N Pritikin
Modified:	2004-12-22 21:47 UTC

See Also:
GNOME target:	---
GNOME version:	---

Attachments
avoid FPE if mpeg_parse->mux_rate is not specified (544 bytes, patch) 2002-11-26 06:41 UTC, Joshua N Pritikin	none	Details \| Review

Description Joshua N Pritikin 2002-11-25 10:47:28 UTC

i re-mixed a VCD mpeg with cinelerra into a mpeg2 (video) and mp3 (audio)
and multiplexed it with mplexlo.  When i try to play this mpeg with
gstreamer CVS, i get the following obvious FPE:

Starting program: /home/joshua/gst/gstreamer/tools/.libs/lt-gst-launch
filesrc location=/local/aleader/nau-scene1-1M.mpg ! mpegdemux name=foo
video_%02d! { queue ! mpeg2dec ! { queue ! colorspace ! xvideosink } }
foo.audio_%02d!{ queue ! mad ! { queue ! osssink } }
[New Thread 1024 (LWP 2001)]
INFO ( 2001: 0) Initializing GStreamer Core Library version 0.4.2.1
INFO ( 2001: 0) CPU features: (0081813f) MMX
registry: loaded user_registry in 1.017360 seconds
          (/home/joshua/.gstreamer/registry.xml)
registry: loaded global_registry in 0.614729 seconds
          (/home/joshua/gst/gstreamer/registry.xml)
GStreamer-INFO: 0 live buffer(s)
GStreamer-INFO: 0 live bufferpool(s)
GStreamer-INFO: 0 live event(s)
RUNNING pipeline
[New Thread 2049 (LWP 2002)]
[New Thread 1026 (LWP 2003)]
[New Thread 2051 (LWP 2004)]
[New Thread 3076 (LWP 2005)]
[New Thread 4101 (LWP 2006)]
sink: caps = (GstCaps *) { audio/mp3;  }
src: caps = (GstCaps *) { audio/mp3;  }
sink: caps = (GstCaps *) { audio/mp3;  }

Program received signal SIGFPE, Arithmetic exception.

+ Trace 30877

Thread 1024 (LWP 2001)

#0 __udivmoddi4
from /home/joshua/gst/gst-plugins/gst/mpegstream/.libs/libgstmpegstream.so
#1 __udivdi3
from /home/joshua/gst/gst-plugins/gst/mpegstream/.libs/libgstmpegstream.so
#2 gst_mpeg_parse_loop
at gstmpegparse.c line 479
#3 gst_basic_scheduler_loopfunc_wrapper
at gstbasicscheduler.c line 279
#4 cothread_stub
at cothreads.c line 444
#5 cothread_switch
at cothreads.c line 650
#6 gst_basic_scheduler_iterate
at gstbasicscheduler.c line 1342
#7 gst_scheduler_iterate
at gstscheduler.c line 645
#8 gst_bin_iterate_func
at gstbin.c line 826
#9 gst_bin_iterate
at gstbin.c line 869
#10 idle_func
at gst-launch.c line 23
#11 g_timeout_add
from /usr/lib/libglib-2.0.so.0
#12 g_get_current_time
from /usr/lib/libglib-2.0.so.0
#13 g_main_context_dispatch
from /usr/lib/libglib-2.0.so.0
#14 g_main_context_dispatch
from /usr/lib/libglib-2.0.so.0
#15 g_main_loop_run
from /usr/lib/libglib-2.0.so.0
#16 gst_main
at gst.c line 589
#17 main
at gst-launch.c line 177
#2 gst_mpeg_parse_loop
at gstmpegparse.c line 479

$3 = 0
(gdb) p mpeg_parse->mux_rate
$4 = 0

To reproduce this problem, use the test mpeg file here:
  <ftp://ftp.berlios.de/pub/redael/nau-scene1-1M.mpg>

Comment 1 Joshua N Pritikin 2002-11-25 10:59:01 UTC

i forgot to mention that mplayer plays this mpeg perfectly.

Comment 2 Joshua N Pritikin 2002-11-26 06:41:05 UTC

Created attachment 12560 [details] [review]
avoid FPE if mpeg_parse->mux_rate is not specified

Comment 3 Joshua N Pritikin 2002-11-26 06:43:37 UTC

The attached patch doesn't fix the main problem.  However, if i run
mplexhi -V (variable rate) then the resulting stream is small and does
play fine.  It remains a low-priority task to figure out how to play
streams mux'd with mplexlo.

Comment 4 Joshua N Pritikin 2002-11-28 06:52:45 UTC

wtay applied the attached patch (& more) but he didn't update bugzilla.