#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-samp... -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@entry=6, no_tid=no_tid@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@entry=6, no_tid=no_tid@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@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> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker