Segmentation fault in decoding

[baltov]

Hi, decoding is not working It can not decode sample Jetson Nano file ./ffmpeg -c:v h264_nvmpi -i /usr/src/nvidia/tegra_multimedia_api/data/Video/sample_outdoor_car_1080p_10fps.h264 -f null -

it throws Segmentation fault (core dumped)

[jocover]

work fine on my jetson nano

jocover@jetson-nano:~/ffmpeg$ ./ffmpeg -c:v h264_nvmpi -i /usr/src/nvidia/tegra_multimedia_api/data/Video/sample_outdoor_car_1080p_10fps.h264 -f null - ffmpeg version 61853f7 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu/Linaro 7.4.0-1ubuntu1~18.04.1) configuration: --enable-nvmpi libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 Input #0, h264, from '/usr/src/nvidia/tegra_multimedia_api/data/Video/sample_outdoor_car_1080p_10fps.h264': Duration: N/A, bitrate: N/A Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 10 fps, 10 tbr, 1200k tbn, 20 tbc Opening in BLOCKING MODE NvMMLiteOpen : Block : BlockType = 261 NVMEDIA: Reading vendor.tegra.display-size : status: 6 NvMMLiteBlockCreate : Block : BlockType = 261 Stream mapping: Stream #0:0 -> #0:0 (h264 (h264_nvmpi) -> wrapped_avframe (native)) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: encoder : Lavf58.29.100 Stream #0:0: Video: wrapped_avframe, yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 10 fps, 10 tbn, 10 tbc Metadata: encoder : Lavc58.54.100 wrapped_avframe frame= 568 fps=187 q=-0.0 Lsize=N/A time=00:00:58.80 bitrate=N/A speed=19.3x video:297kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

You can try to recompile latest version nvmpi and ffmpeg

[baltov]

Thank you for quick answer. Yes I compiled it with latest ffmpeg 4.2 as it is described.

./ffmpeg -c:v h264_nvmpi -i /usr/src/nvidia/tegra_multimedia_api/data/Video/sample_outdoor_car_1080p_10fps.h264 -f null - ffmpeg version 61853f7 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu/Linaro 7.4.0-1ubuntu1~18.04.1) configuration: --enable-nvmpi libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 Input #0, h264, from '/usr/src/nvidia/tegra_multimedia_api/data/Video/sample_outdoor_car_1080p_10fps.h264': Duration: N/A, bitrate: N/A Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 10 fps, 10 tbr, 1200k tbn, 20 tbc Failed to query video capabilities: Inappropriate ioctl for device Opening in BLOCKING MODE NvMMLiteOpen : Block : BlockType = 261 NVMEDIA: Reading sys.display-size : status: 6 NvMMLiteBlockCreate : Block : BlockType = 261 Stream mapping: Stream #0:0 -> #0:0 (h264 (h264_nvmpi) -> wrapped_avframe (native)) Press [q] to stop, [?] for help NVMAP_IOC_READ failed: Interrupted system call NVMAP_IOC_READ: Offset 0 SrcStride 2048 pDst 0x7fa0005dc0 DstStride 1920 Count 540 NVMAP_IOC_READ failed: Interrupted system call NVMAP_IOC_READ: Offset 2228224 SrcStride 1024 pDst 0x7fa0005de0 DstStride 960 Count 540 NVMAP_IOC_READ failed: Invalid argument NVMAP_IOC_READ: Offset 2883584 SrcStride 1024 pDst 0x7fa0005e00 DstStride 960 Count 2048 NVMAP_IOC_READ failed: Interrupted system call NVMAP_IOC_READ: Offset 0 SrcStride 2048 pDst 0x7fa0007890 DstStride 1920 Count 540 NVMAP_IOC_READ failed: Interrupted system call NVMAP_IOC_READ: Offset 2228224 SrcStride 1024 pDst 0x7fa00078b0 DstStride 960 Count 540 NVMAP_IOC_READ failed: Invalid argument NVMAP_IOC_READ: Offset 2883584 SrcStride 1024 pDst 0x7fa00078d0 DstStride 960 Count 2048 Segmentation fault (core dumped)

if it can be helpful, that is the stack trace

Thread 1 "ffmpeg_g" received signal SIGSEGV, Segmentation fault. __memcpy_generic () at ../sysdeps/aarch64/multiarch/../memcpy.S:188 188 ../sysdeps/aarch64/multiarch/../memcpy.S: No such file or directory. (gdb) bt

0 __memcpy_generic () at ../sysdeps/aarch64/multiarch/../memcpy.S:188

1 0x0000005556113908 in memcpy (len=1920, src=0x7fa0020cc0, __dest=) at /usr/include/aarch64-linux-gnu/bits/string_fortified.h:34

2 image_copy_plane (height=1026, bytewidth=1920, src_linesize=,

src=0x7fa0020cc0 "\230\230\227\227\226\225\225\224\223\221\216\214\212\210\205\203\200~{zywvuutuutsrqqqqqpooomiiknlijginornikquwwnjiggffiquz|||||xttqaXVX^fonfelsz|{{{{{{|||||}}}}}}}\177\200\200\177wi][\\]^^_]^\\itz{|}~\177\177\177\177~}}}|zwwxyyyyyzzzzzzytorz}}}|{zxxxy{}~\200\200\200\200\200\177\177~|{zzz|}~\177\201\203\203\203\203\200"..., 
dst_linesize=<optimized out>, dst=<optimized out>) at libavutil/imgutils.c:317

3 image_copy (copy_plane=, height=, width=1920, pix_fmt=AV_PIX_FMT_YUV420P, src_linesizes=0x7fffffe228, src_data=0x7fffffe2c8,

dst_linesizes=0x7fffffe208, dst_data=0x5556d56c40) at libavutil/imgutils.c:380

4 av_image_copy (dst_data=dst_data@entry=0x5556d56c40, dst_linesizes=dst_linesizes@entry=0x5556d56c80, src_data=src_data@entry=0x7fffffe2c8,

src_linesizes=src_linesizes@entry=0x7fffffe2b8, pix_fmt=AV_PIX_FMT_YUV420P, width=1920, height=1080) at libavutil/imgutils.c:399

5 0x0000005555bdb9b8 in nvmpi_decode (avctx=0x5556d561d0, data=0x5556d56c40, got_frame=0x7fffffe3e0, avpkt=0x5556d39dc0) at libavcodec/nvmpi_dec.c:113

6 0x00000055559fc0e8 in decode_simple_internal (frame=0x5556d56c40, avctx=0x5556d561d0) at libavcodec/decode.c:433

7 decode_simple_receive_frame (frame=, avctx=) at libavcodec/decode.c:629

8 decode_receive_frame_internal (avctx=avctx@entry=0x5556d561d0, frame=0x5556d56c40) at libavcodec/decode.c:647

9 0x00000055559fcba0 in avcodec_send_packet (avctx=0x5556d561d0, avpkt=0x7fffffe4a0) at libavcodec/decode.c:705

10 0x00000055556e0908 in decode (pkt=0x7fffffe4a0, got_frame=0x7fffffe608, frame=, avctx=0x5556d561d0) at fftools/ffmpeg.c:2240

11 decode_video (ist=0x5556d62010, pkt=0x7fffffe618, got_output=0x7fffffe608, duration_pts=0x7fffffe610, eof=0, decode_failed=0x7fffffe60c) at fftools/ffmpeg.c:2382

12 0x00000055556e1450 in process_input_packet (ist=0x5556d62010, pkt=0x7fffffe848, no_eof=0) at fftools/ffmpeg.c:2623

13 0x00000055556e3960 in process_input (file_index=) at fftools/ffmpeg.c:4518

14 transcode_step () at fftools/ffmpeg.c:4638

15 transcode () at fftools/ffmpeg.c:4692

16 0x00000055556c2cb8 in main (argc=, argv=) at fftools/ffmpeg.c:4894