Segmentation fault when capture webcam frame

[laurent22]

I'm getting a segmentation fault when I try to capture a frame from my webcam. The same command used to work fine but now doesn't, I'm not sure if it's due to a change in ffmpeg or in my system (I recently applied the Windows 10 Anniversary Edition update if that can make a difference).

I got the Windows build from there: ​https://ffmpeg.zeranoe.com/builds/

How to reproduce:

% ffmpeg.exe -y -loglevel trace -f dshow -i video="USB2.0 HD UVC WebCam" d:\cap_20160814T154913_552705200.jpg

Output:

ffmpeg version N-81338-g6612d04 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --ena
ble-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-lib
openjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 28.100 / 55. 28.100
  libavcodec     57. 51.102 / 57. 51.102
  libavformat    57. 46.101 / 57. 46.101
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 51.100 /  6. 51.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'trace'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'dshow'.
Reading option '-i' ... matched as input file with argument 'video=USB2.0 HD UVC WebCam'.
Reading option 'd:\cap_20160814T154913_552705200.jpg' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option loglevel (set logging level) with argument trace.
Successfully parsed a group of options.
Parsing a group of options: input file video=USB2.0 HD UVC WebCam.
Applying option f (force format) with argument dshow.
Successfully parsed a group of options.
Opening an input file: video=USB2.0 HD UVC WebCam.
[dshow @ 0000000000e124a0] Selecting pin Capture on video

GDB trace:

(gdb) r -y -loglevel trace -f dshow -i video="USB2.0 HD UVC WebCam" d:\cap_20160814T154913_552705200.jpg
Starting program: d:\Programmes\ffmpeg\bin\ffmpeg_g.exe -y -loglevel trace -f dshow -i video="USB2.0 HD UVC WebCam" d:\cap_20160814T154913_552705200.jpg
[New Thread 12988.0x2438]
warning: `C:\WINDOWS\SYSTEM32\ntdll.dll': Shared library architecture i386:x86-64 is not compatible with target architecture i386.
warning: `C:\WINDOWS\System32\wow64.dll': Shared library architecture i386:x86-64 is not compatible with target architecture i386.
warning: `C:\WINDOWS\System32\wow64win.dll': Shared library architecture i386:x86-64 is not compatible with target architecture i386.
warning: Could not load shared library symbols for WOW64_IMAGE_SECTION.
Do you need "set solib-search-path" or "set sysroot"?
warning: Could not load shared library symbols for WOW64_IMAGE_SECTION.
Do you need "set solib-search-path" or "set sysroot"?
warning: Could not load shared library symbols for NOT_AN_IMAGE.
Do you need "set solib-search-path" or "set sysroot"?
warning: Could not load shared library symbols for NOT_AN_IMAGE.
Do you need "set solib-search-path" or "set sysroot"?
warning: `C:\WINDOWS\System32\wow64cpu.dll': Shared library architecture i386:x86-64 is not compatible with target architecture i386.
[New Thread 12988.0x3100]
[New Thread 12988.0x14fc]
[New Thread 12988.0x1d9c]
ffmpeg version N-80614-g7e4e8fd Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.3.0 (GCC)
  configuration: --arch=x86 --target-os=mingw32 --cross-prefix=/home/rdp/dev/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-i686/bin/i686-w64-mingw32- --pkg-config=pkg-config --disable-w32threads --enable-gpl --enable-libsox
r --enable-fontconfig --enable-libass --enable-libbluray --enable-iconv --enable-libtwolame --extra-cflags=-DLIBTWOLAME_STATIC --enable-libzvbi --enable-libcaca --enable-libmodplug --extra-libs=-lstdc++ --extra-libs=-lpng --enable-libvidsta
b --enable-libx265 --enable-decklink --extra-libs=-loleaut32 --enable-libx264 --enable-libxvid --enable-libmp3lame --enable-version3 --enable-zlib --enable-librtmp --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libopenjpeg
 --enable-gnutls --enable-libgsm --enable-libfreetype --enable-libopus --enable-frei0r --enable-filter=frei0r --enable-bzlib --enable-libxavs --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libschroedi
nger --enable-libvpx --enable-libilbc --enable-libwavpack --enable-libwebp --enable-libgme --enable-dxva2 --enable-avisynth --enable-gray --enable-libopenh264 --enable-nvenc --enable-libmfx --extra-libs=-lpsapi --extra-cflags= --enable-stat
ic --disable-shared --prefix=/home/rdp/dev/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-i686/i686-w64-mingw32 --enable-runtime-cpudetect
  libavutil      55. 26.100 / 55. 26.100
  libavcodec     57. 46.100 / 57. 46.100
  libavformat    57. 40.101 / 57. 40.101
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.102 /  6. 46.102
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'trace'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'dshow'.
Reading option '-i' ... matched as input file with argument 'video=USB2.0 HD UVC WebCam'.
Reading option 'd:\cap_20160814T154913_552705200.jpg' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option loglevel (set logging level) with argument trace.
Successfully parsed a group of options.
Parsing a group of options: input file video=USB2.0 HD UVC WebCam.
Applying option f (force format) with argument dshow.
Successfully parsed a group of options.
Opening an input file: video=USB2.0 HD UVC WebCam.
[New Thread 12988.0x301c]
[New Thread 12988.0x2608]
[dshow @ 0ae24b20] Selecting pin Capture on video
[New Thread 12988.0x2a38]
[Thread 12988.0x2a38 exited with code 0]
[New Thread 12988.0x6ec]
[Thread 12988.0x6ec exited with code 0]
[New Thread 12988.0x1c8]
[New Thread 12988.0x33c0]
[New Thread 12988.0x24c0]
[New Thread 12988.0x84c]
[New Thread 12988.0x1d14]
warning: HEAP[ffmpeg_g.exe]:
warning: Invalid address specified to RtlFreeHeap( 089F0000, 0AE568D0 )

[New Thread 12988.0x208c]
dshow passing through packet of type video size   614400 timestamp 1539965470000 orig timestamp 1539962300000 graph timestamp 1539965470000 diff 3170000 USB2.0 HD UVC WebCam
[New Thread 12988.0x2f30]
[dshow @ 0ae24b20] All info found
[dshow @ 0ae24b20] stream 0: start_time: 153996.547 duration: -922337203685.478
[dshow @ 0ae24b20] format: start_time: 153996.547 duration: -9223372036854.775 bitrate=0 kb/s
Input #0, dshow, from 'video=USB2.0 HD UVC WebCam':
  Duration: N/A, start: 153996.547000, bitrate: N/A
    Stream #0:0, 1, 1/10000000: Video: rawvideo, 1 reference frame (YUY2 / 0x32595559), yuyv422, 640x480, 0/1, 30 fps, 30 tbr, 10000k tbn, 10000k tbc
Successfully opened the file.
Parsing a group of options: output file d:\cap_20160814T154913_552705200.jpg.
Successfully parsed a group of options.
Opening an output file: d:\cap_20160814T154913_552705200.jpg.
Successfully opened the file.
detected 8 logical cores
[New Thread 12988.0x588]
[New Thread 12988.0x1eb8]
[New Thread 12988.0x1530]
[New Thread 12988.0x2bf8]
[New Thread 12988.0x17b0]
[New Thread 12988.0x2808]
[New Thread 12988.0x1bdc]
[New Thread 12988.0x3300]
[New Thread 12988.0x8b8]
[graph 0 input from stream 0:0 @ 0ae60580] Setting 'video_size' to value '640x480'
[graph 0 input from stream 0:0 @ 0ae60580] Setting 'pix_fmt' to value '1'
[graph 0 input from stream 0:0 @ 0ae60580] Setting 'time_base' to value '1/10000000'
[graph 0 input from stream 0:0 @ 0ae60580] Setting 'pixel_aspect' to value '0/1'
[graph 0 input from stream 0:0 @ 0ae60580] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0ae60580] Setting 'frame_rate' to value '10000000/333333'
[graph 0 input from stream 0:0 @ 0ae60580] w:640 h:480 pixfmt:yuyv422 tb:1/10000000 fr:10000000/333333 sar:0/1 sws_param:flags=2
[format @ 0ae60ce0] compat: called with args=[yuvj420p|yuvj422p|yuvj444p]
[format @ 0ae60ce0] Setting 'pix_fmts' to value 'yuvj420p|yuvj422p|yuvj444p'
[auto-inserted scaler 0 @ 0ae61b80] Setting 'flags' to value 'bicubic'
[auto-inserted scaler 0 @ 0ae61b80] w:iw h:ih flags:'bicubic' interl:0
[format @ 0ae60ce0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
[AVFilterGraph @ 0ae248a0] query_formats: 4 queried, 2 merged, 1 already done, 0 delayed
[auto-inserted scaler 0 @ 0ae61b80] picking yuvj422p out of 3 ref:yuyv422 alpha:0
dshow passing through packet of type video size   614400 timestamp 1539965750000 orig timestamp 1539962620487 graph timestamp 1539965750000 diff 3129513 USB2.0 HD UVC WebCam
[swscaler @ 0ae61fc0] deprecated pixel format used, make sure you did set range correctly
[auto-inserted scaler 0 @ 0ae61b80] w:640 h:480 fmt:yuyv422 sar:0/1 -> w:640 h:480 fmt:yuvj422p sar:0/1 flags:0x4
[mjpeg @ 0ae5c380] Forcing thread count to 1 for MJPEG encoding, use -thread_type slice or a constant quantizer if you want to use multiple cpu cores
[mjpeg @ 0ae5c380] intra_quant_bias = 96 inter_quant_bias = 0
[image2 @ 0ae58ca0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
Output #0, image2, to 'd:\cap_20160814T154913_552705200.jpg':
  Metadata:
    encoder         : Lavf57.40.101
    Stream #0:0, 0, 333333/10000000: Video: mjpeg, 1 reference frame, yuvj422p(pc), 640x480, 0/1, q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc
    Metadata:
      encoder         : Lavc57.46.100 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[rawvideo @ 0ae58380] PACKET SIZE: 614400, STRIDE: 1280
Clipping frame in rate conversion by 0.000008
[file @ 12731d00] Setting default whitelist 'file,crypto'
[AVIOContext @ 1273e740] Statistics: 0 seeks, 1 writeouts
[rawvideo @ 0ae58380] PACKET SIZE: 614400, STRIDE: 1280
Clipping frame in rate conversion by 0.156242
[image2 @ 0ae58ca0] Could not get frame filename number 2 from pattern 'd:\cap_20160814T154913_552705200.jpg' (either set updatefirst or use a pattern like %03d within the filename pattern)
av_interleaved_write_frame(): Invalid argument
No more output streams to write to, finishing.
frame=    2 fps=0.0 q=2.2 Lsize=N/A time=00:00:00.06 bitrate=N/A speed=4.44x
video:45kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (video=USB2.0 HD UVC WebCam):
  Input stream #0:0 (video): 2 packets read (1228800 bytes); 2 frames decoded;
  Total: 2 packets (1228800 bytes) demuxed
Output file #0 (d:\cap_20160814T154913_552705200.jpg):
  Output stream #0:0 (video): 2 frames encoded; 2 packets muxed (46478 bytes);
  Total: 2 packets (46478 bytes) muxed
2 frames successfully decoded, 0 decoding errors
[Thread 12988.0x2808 exited with code 0]
[Thread 12988.0x17b0 exited with code 0]
[Thread 12988.0x588 exited with code 0]
[Thread 12988.0x1eb8 exited with code 0]
[Thread 12988.0x1530 exited with code 0]
[Thread 12988.0x2bf8 exited with code 0]
[Thread 12988.0x1bdc exited with code 0]
dshow passing through packet of type video size   614400 timestamp 1539966140000 orig timestamp 1539962940701 graph timestamp 1539966140000 diff 3199299 USB2.0 HD UVC WebCam
[Thread 12988.0x3300 exited with code 0]
[Thread 12988.0x8b8 exited with code 0]
[Thread 12988.0x24c0 exited with code 0]
[Thread 12988.0x301c exited with code 0]
[Thread 12988.0x1d14 exited with code 0]
[Thread 12988.0x208c exited with code 0]
[Thread 12988.0x2608 exited with code 0]
[Thread 12988.0x84c exited with code 0]
[Thread 12988.0x33c0 exited with code 0]
[Thread 12988.0x1c8 exited with code 0]
[New Thread 12988.0x2824]
[Thread 12988.0x2f30 exited with code 0]
Conversion failed!
[Thread 12988.0x1d9c exited with code 1]
[Thread 12988.0x3100 exited with code 1]
[Thread 12988.0x2824 exited with code 1]
[Thread 12988.0x14fc exited with code 1]
[Inferior 1 (process 12988) exited with code 01]

In fact, I've just noticed that, unfortunately, when running in gdb it works, though the exact same command outside definitely crashes. If I can provide any additional information, please let me know

[laurent22]

This is the Windows even log:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
  <EventID Qualifiers="0">1000</EventID>
  <Level>2</Level>
  <Task>100</Task>
  <Keywords>0x80000000000000</Keywords>
  <TimeCreated SystemTime="2016-08-14T15:25:11.794409900Z" />
  <EventRecordID>478</EventRecordID>
  <Channel>Application</Channel>
  <Computer>ROG</Computer>
  <Security />
  </System>
  <EventData>
    <Data>ffmpeg.exe</Data>
    <Data>0.0.0.0</Data>
    <Data>00000000</Data>
    <Data>ntdll.dll</Data>
    <Data>10.0.14393.0</Data>
    <Data>578997b2</Data>
    <Data>c0000374</Data>
    <Data>00000000000f73e3</Data>
    <Data>2e1c</Data>
    <Data>01d1f6400c2bcb28</Data>
    <Data>d:\Programmes\ffmpeg\bin\ffmpeg.exe</Data>
    <Data>C:\WINDOWS\SYSTEM32\ntdll.dll</Data>
    <Data>50d89ed6-f935-454b-ac42-012f9624b04a</Data>
    <Data />
    <Data />
  </EventData>
</Event>

[laurent22]

This is the Windows even log:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
  <EventID Qualifiers="0">1000</EventID>
  <Level>2</Level>
  <Task>100</Task>
  <Keywords>0x80000000000000</Keywords>
  <TimeCreated SystemTime="2016-08-14T15:25:11.794409900Z" />
  <EventRecordID>478</EventRecordID>
  <Channel>Application</Channel>
  <Computer>ROG</Computer>
  <Security />
  </System>
  <EventData>
    <Data>ffmpeg.exe</Data>
    <Data>0.0.0.0</Data>
    <Data>00000000</Data>
    <Data>ntdll.dll</Data>
    <Data>10.0.14393.0</Data>
    <Data>578997b2</Data>
    <Data>c0000374</Data>
    <Data>00000000000f73e3</Data>
    <Data>2e1c</Data>
    <Data>01d1f6400c2bcb28</Data>
    <Data>d:\Programmes\ffmpeg\bin\ffmpeg.exe</Data>
    <Data>C:\WINDOWS\SYSTEM32\ntdll.dll</Data>
    <Data>50d89ed6-f935-454b-ac42-012f9624b04a</Data>
    <Data />
    <Data />
  </EventData>
</Event>

[Carl Eugen Hoyos]

See #5775.