[FFmpeg-trac] #11666(avformat:new): mxfenc assertion failure

[FFmpeg]

#11666: mxfenc assertion failure
-------------------------------------+-------------------------------------
             Reporter:  Jacob        |                     Type:  defect
  Lifshay                            |
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:  git-
                                     |  master
             Keywords:  mxf, avio    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 mxf muxer has an assertion failure when trying to use the h264 codec.
 How to reproduce (debug output too long, so I attached as a file):
 {{{
 % wget
 "https://www.digitizationguidelines.gov/guidelines/MXF_sampleFiles/RDD48-sample11
 -gf-unc-ntsc-4.2.zip"
 % sha256sum -b RDD48-sample11-gf-unc-ntsc-4.2.zip
 ad3afa838c32d6ec231f7d0cc2b578de4e4d6f5d1053bc75e291e41a0138457a
 *RDD48-sample11-gf-unc-ntsc-4.2.zip
 % unzip RDD48-sample11-gf-unc-ntsc-4.2.zip
 % gdb -q --batch -ex run -ex bt --args ./ffmpeg-git -y -v 9 -loglevel 99
 -i RDD48-sample11-gf-unc-ntsc-4.2.mxf -c:v h264 /tmp/out.mxf
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
 ffmpeg version N-120228-g3334bdc6e7 Copyright (c) 2000-2025 the FFmpeg
 developers
   built with gcc 12 (Debian 12.2.0-14+deb12u1)
   configuration: --disable-stripping --assert-level=2 --enable-ftrapv
 --disable-shared --enable-static --optflags=-O0 --progs-suffix=-git
 --enable-sdl2 --extra-cflags=-g --enable-libx264 --enable-gpl --enable-
 libklvanc
   libavutil      60.  4.101 / 60.  4.101
   libavcodec     62.  6.100 / 62.  6.100
   libavformat    62.  1.102 / 62.  1.102
   libavdevice    62.  0.100 / 62.  0.100
   libavfilter    11.  1.100 / 11.  1.100
   libswscale      9.  0.100 /  9.  0.100
   libswresample   6.  0.100 /  6.  0.100
 Splitting the commandline.
 <snip>
 Thread 72 "mux0:mxf" received signal SIGABRT, Aborted.
 [Switching to Thread 0x7fffaeac16c0 (LWP 878133)]
 __pthread_kill_implementation (threadid=<optimized out>,
 signo=signo at entry=6, no_tid=no_tid at entry=0) at ./nptl/pthread_kill.c:44
 44      ./nptl/pthread_kill.c: No such file or directory.
 #0  __pthread_kill_implementation (threadid=<optimized out>,
 signo=signo at entry=6, no_tid=no_tid at entry=0) at ./nptl/pthread_kill.c:44
 #1  0x00007ffff76a9f4f in __pthread_kill_internal (signo=6,
 threadid=<optimized out>) at ./nptl/pthread_kill.c:78
 #2  0x00007ffff765afb2 in __GI_raise (sig=sig at entry=6) at
 ../sysdeps/posix/raise.c:26
 #3  0x00007ffff7645472 in __GI_abort () at ./stdlib/abort.c:79
 #4  0x0000555555c92054 in avio_w8 (s=0x5555590d5300, b=-129) at
 libavformat/aviobuf.c:181
 #5  0x0000555555decc0a in mxf_write_index_table_segment (s=0x5555590ccf40)
 at libavformat/mxfenc.c:2106
 #6  0x0000555555df1def in mxf_write_packet (s=0x5555590ccf40,
 pkt=0x7fffa8000900) at libavformat/mxfenc.c:3373
 #7  0x0000555555dd48b3 in write_packet (s=0x5555590ccf40,
 pkt=0x7fffa8000900) at libavformat/mux.c:746
 #8  0x0000555555dd59b2 in interleaved_write_packet (s=0x5555590ccf40,
 pkt=0x7fffa8000900, flush=0, has_packet=0) at libavformat/mux.c:1087
 #9  0x0000555555dd5b45 in write_packet_common (s=0x5555590ccf40,
 st=0x5555590cf240, pkt=0x7fffa8000900, interleaved=1) at
 libavformat/mux.c:1112
 #10 0x0000555555dd5e42 in write_packets_common (s=0x5555590ccf40,
 pkt=0x7fffa8000900, interleaved=1) at libavformat/mux.c:1172
 #11 0x0000555555dd6017 in av_interleaved_write_frame (s=0x5555590ccf40,
 pkt=0x7fffa8000900) at libavformat/mux.c:1228
 #12 0x000055555569bcec in write_packet (mux=0x5555590ccb80,
 ost=0x5555590cd700, pkt=0x7fffa8000900) at fftools/ffmpeg_mux.c:236
 #13 0x000055555569beb0 in sync_queue_process (mux=0x5555590ccb80,
 ms=0x5555590cd700, pkt=0x7fffa8000900, stream_eof=0x7fffaeac0dcc) at
 fftools/ffmpeg_mux.c:280
 #14 0x000055555569c236 in mux_packet_filter (mux=0x5555590ccb80,
 mt=0x7fffaeac0dd0, ost=0x5555590cd700, pkt=0x7fffa8000900,
 stream_eof=0x7fffaeac0dcc) at fftools/ffmpeg_mux.c:356
 #15 0x000055555569c550 in muxer_thread (arg=0x5555590ccb80) at
 fftools/ffmpeg_mux.c:438
 #16 0x00005555556b7253 in task_wrapper (arg=0x5555590bd5e0) at
 fftools/ffmpeg_sched.c:2534
 #17 0x00007ffff76a81f5 in start_thread (arg=<optimized out>) at
 ./nptl/pthread_create.c:442
 #18 0x00007ffff772889c in clone3 () at
 ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11666>
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