[FFmpeg-trac] #2924(avcodec:open): ffv1: deadlock with 8 threads

[FFmpeg]

#2924: ffv1: deadlock with 8 threads
--------------------------------------+-----------------------------------
             Reporter:  ami_stuff     |                    Owner:
                 Type:  defect        |                   Status:  open
             Priority:  important     |                Component:  avcodec
              Version:  git-master    |               Resolution:
             Keywords:  fv1 deadlock  |               Blocked By:
             Blocking:                |  Reproduced by developer:  1
Analyzed by developer:  0             |
--------------------------------------+-----------------------------------
Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1
 * component:  undetermined => avcodec
 * priority:  normal => important
 * version:  unspecified => git-master
 * keywords:   => fv1 deadlock


Comment:

 {{{
 (gdb) r -i ffv1_dead.avi -f null -
 Starting program: ffmpeg_g -i ffv1_dead.avi -f null -
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib64/libthread_db.so.1".
 ffmpeg version N-55944-g7c18058 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Sep  1 2013 13:14:38 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 43.100 / 52. 43.100
   libavcodec     55. 30.100 / 55. 30.100
   libavformat    55. 15.100 / 55. 15.100
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 82.102 /  3. 82.102
   libswscale      2.  5.100 /  2.  5.100
   libswresample   0. 17.103 /  0. 17.103
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, avi, from 'ffv1_dead.avi':
   Metadata:
     encoder         : Lavf55.13.101
   Duration: 00:00:12.64, start: 0.000000, bitrate: 5802 kb/s
     Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv410p, 320x240, 23.97
 tbr, 23.97 tbn, 23.97 tbc
 [New Thread 0x7ffff59eb700 (LWP 2425)]
 [New Thread 0x7ffff51ea700 (LWP 2426)]
 [New Thread 0x7ffff49e9700 (LWP 2427)]
 [New Thread 0x7ffff41e8700 (LWP 2428)]
 [New Thread 0x7ffff39e7700 (LWP 2430)]
 [New Thread 0x7ffff31e6700 (LWP 2431)]
 [New Thread 0x7ffff29e5700 (LWP 2432)]
 [New Thread 0x7ffff21e4700 (LWP 2433)]
 [New Thread 0x7ffff19e3700 (LWP 2434)]
 [New Thread 0x7ffff11e2700 (LWP 2435)]
 [New Thread 0x7ffff09e1700 (LWP 2436)]
 [New Thread 0x7ffff01e0700 (LWP 2437)]
 [New Thread 0x7fffef9df700 (LWP 2438)]
 [New Thread 0x7fffef1de700 (LWP 2439)]
 [New Thread 0x7fffee9dd700 (LWP 2440)]
 [New Thread 0x7fffee1dc700 (LWP 2441)]
 [New Thread 0x7fffed9db700 (LWP 2442)]
 [New Thread 0x7fffed1da700 (LWP 2443)]
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf55.15.100
     Stream #0:0: Video: rawvideo (YUV9 / 0x39565559), yuv410p, 320x240,
 q=2-31, 200 kb/s, 90k tbn, 23.97 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (ffv1 -> rawvideo)
 Press [q] to stop, [?] for help
 [ffv1 @ 0x16e0ea0] Invalid change of global parameters
 [ffv1 @ 0x16e1700] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x16e1f60] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x16e27c0] Cannot decode non-keyframe without valid keyframe
 [null @ 0x16edb80] Encoder did not produce proper pts, making some up.
 [ffv1 @ 0x16e3020] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x16ebd20] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x16ec440] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
 [ffv1 @ 0x16dfdc0] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
     Last message repeated 6 times
 Program received signal SIGINT, Interrupt.
 0x00007ffff6ce88f4 in pthread_cond_wait@@GLIBC_2.3.2 () from
 /lib64/libpthread.so.0
 (gdb) bt
 #0  0x00007ffff6ce88f4 in pthread_cond_wait@@GLIBC_2.3.2 () from
 /lib64/libpthread.so.0
 #1  0x000000000092e9ab in ff_thread_decode_frame
 (avctx=avctx at entry=0x16e7360,
     picture=picture at entry=0x16e3a00,
 got_picture_ptr=got_picture_ptr at entry=0x7fffffffd7ec,
     avpkt=avpkt at entry=0x7fffffffd570) at libavcodec/pthread.c:631
 #2  0x00000000009d6d43 in avcodec_decode_video2 (avctx=0x16e7360,
     picture=picture at entry=0x16e3a00,
 got_picture_ptr=got_picture_ptr at entry=0x7fffffffd7ec,
     avpkt=avpkt at entry=0x7fffffffda50) at libavcodec/utils.c:1980
 #3  0x000000000046c3e0 in decode_video (ist=ist at entry=0x16ed7e0,
     pkt=pkt at entry=0x7fffffffda50,
 got_output=got_output at entry=0x7fffffffd7ec)
     at ffmpeg.c:1668
 #4  0x000000000046f6df in output_packet (pkt=0x7fffffffd9f0,
 ist=0x16ed7e0) at ffmpeg.c:1866
 #5  process_input (file_index=<optimized out>) at ffmpeg.c:3085
 #6  0x000000000045d850 in transcode_step () at ffmpeg.c:3181
 #7  transcode () at ffmpeg.c:3233
 #8  main (argc=<optimized out>, argv=<optimized out>) at ffmpeg.c:3411
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2924#comment:1>
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