[Ffmpeg-devel] Crash when encoding to H.264

[Tyler Loch]

With recent SVN revisions of ffmpeg on Mac OS X, encoding to x264 crashes with
"Illegal instruction"
Current ffmpeg SVN, x264 r537 (the one mentioned in the last libavcodec/x264.c
revision). The problem arises with any SVN revision of x264, and is also present
when replacing libavcodec/x264.c with its previous revision.
This most current test is on PPC (Mac OS X 10.4.7), but I had a similar
problem on x86 just last week.

Sample run:
FFmpeg version SVN-r5998, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --enable-x264 --enable-gpl 
  libavutil version: 49.0.0
  libavcodec version: 51.11.0
  libavformat version: 50.5.0
  built on Aug 14 2006 15:26:14, gcc: 4.0.1 (Apple Computer, Inc. build 5341)
Input #0, mpeg, from '/Users/tylerl/Desktop/palpyintro.mpg':
  Duration: 00:00:04.7, start: 0.696978, bitrate: 999 kb/s
Stream#0.0[0x1e0]:Video: mpeg1video, yuv420p, 448x160, 104857 kb/s, 23.98 fps(r)
Stream#0.1[0x1c0]:Audio: mp2, 48000 Hz, stereo, 64 kb/s
File 'zrr.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'zrr.mp4':
  Stream #0.0: Video: h264, yuv420p, 448x160, q=2-31, 200 kb/s, 23.98 fps(c)
  Stream #0.1: Audio: 0x0000, 48000 Hz, stereo, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Illegal instruction

--
Debug info, for what it's worth:
PID:    2182
Thread: 0

Exception:  EXC_BAD_INSTRUCTION (0x0002)
Code[0]:    0x00000002
Code[1]:    0x00235404


Thread 0 Crashed:
0   ffmpeg 	0x00235404 av_evaluate_lls + 6148
1   ffmpeg 	0x00235d68 x264_encoder_open + 104
2   ffmpeg 	0x00235d68 x264_encoder_open + 104
3   ffmpeg 	0x001c8d10 X264_init + 1184
4   ffmpeg 	0x00067c6c avcodec_open + 492
5   ffmpeg 	0x0000b9ac main + 3612
6   ffmpeg 	0x000024a4 start + 404
7   ffmpeg 	0x0000234c start + 60

Thread 0 crashed with PPC Thread State 64:
  srr0: 0x0000000000235404 srr1: 0x000000000208f030                        
  vrsave: 0x0000000000000000
    cr: 0x24442244          xer: 0x0000000020000006   lr: 0x0000000000235d68  
    ctr: 0x0000000000000000
    r0: 0x0000000000235d68   r1: 0x00000000bffff3e0   r2: 0x0000000000000000   
    r3: 0x0000000000593000
    r4: 0x000000000280600c   r5: 0x000000000000020c   r6: 0x00000000000001c0   
    r7: 0x00000000000000a0
    r8: 0x0000000000000030   r9: 0x0000000000000000  r10: 0x0000000000000060  
    r11: 0x0000000000000080
   r12: 0x000000000059320c  r13: 0x0000000001101878  r14: 0x0000000000360000  
   r15: 0x0000000000360000
   r16: 0x0000000000000001  r17: 0x0000000001100140  r18: 0x0000000001100120  
   r19: 0x0000000001101870
   r20: 0x0000000000000001  r21: 0x0000000000000002  r22: 0x0000000000000002  
   r23: 0x0000000001101830
   r24: 0x0000000002804200  r25: 0x00000000002cb508  r26: 0x0000000002805e00  
   r27: 0x0000000002805e00
   r28: 0x000000000035ccb4  r29: 0x0000000000593000  r30: 0x0000000002801c00  
   r31: 0x0000000000593000


-Tyler Loch