[MEncoder-users] MEncoder floating point exception

Gavin Hamill gdh at acentral.co.uk
Wed Dec 28 18:56:49 CET 2005

Hi, I'm trying to use this commandline to get MEncoder to mux two MPEG
ESs together into a PS:

$ mencoder -of mpeg -mpegopts tsaf -ovc copy -oac copy -o blah
-audiofile out0.mp2 out.mv2

I'm getting 'floating point exception' with both a 'mencoder-586' Debian
package from the nerim.net repo, and also having compiled it from source

MEncoder 1.0pre7-3.3.5 (C) 2000-2005 MPlayer Team
CPU: IDT/Centaur/VIA C3 Samuel 2 (WinChip C5B core)/C3 Ezra (Family: 6,
Stepping: 3)
Detected cache-line size is 32 bytes
CPUflags: Type: 6 MMX: 1 MMX2: 0 3DNow: 1 3DNow2: 0 SSE: 0 SSE2: 0
Compiled for x86 CPU with extensions: MMX 3DNow

File not found: 'frameno.avi'
Failed to open frameno.avi
success: format: 0  data: 0x0 - 0x32cb8f
MPEG-ES file format detected.
Audio file detected.
VIDEO:  MPEG2  544x576  (aspect 2)  25.000 fps  15000.0 kbps (1875.0
[V] filefmt:65536  fourcc:0x10000002  size:544x576  fps:25.00
PACKET SIZE: 2048 bytes
videocodec: framecopy (544x576 24bpp fourcc=10000002)
audiocodec: framecopy (format=55 chans=2 rate=48000 bits=16 bps=0
Writing AVI header...
Limiting audio preload to 0.4s
Increasing audio density to 4

Program received signal SIGFPE, Arithmetic exception.
[Switching to Thread -1215803264 (LWP 24365)]
0x08491fd0 in RTCPInstance::onExpire ()
(gdb) bt
#0  0x08491fd0 in RTCPInstance::onExpire ()
#1  0x080cd0cd in ?? ()
#2  0x00000000 in ?? ()
#3  0x00000000 in ?? ()
#4  0x00000000 in ?? ()
#5  0x00000000 in ?? ()
#6  0xbfa21c78 in ?? ()
#7  0xb7918f02 in realloc () from /lib/tls/libc.so.6
Previous frame inner to this frame (corrupt stack?)

If I use the non-stripped version of 'mencoder' from the root of the
source directory, the trace is slightly different:

Program received signal SIGFPE, Arithmetic exception.
[Switching to Thread -1215008640 (LWP 24388)]
0x08491fd0 in __udivdi3 ()
(gdb) bt
#0  0x08491fd0 in __udivdi3 ()
#1  0x080cd0cd in mpegfile_write_chunk ()
#2  0x00000000 in ?? ()

I'm not a coder but I can see this backtrace isn't much use - what can I
do to get more useful information?

The CPU type is correct - it's an 800MHz VIA C3.


More information about the MEncoder-users mailing list