Access Violation using ddagrab filter in Windows x86 (32 bit)

[Vadim Guchenko]

Summary of the bug:

I'm trying to record a video from Windows desktop using Desktop Duplication API (ddagrab filter). I cross-compiled ffmpeg 6.1.1 release for two Windows architectures - x86_64 and x86_32. All configuration options are same except the architecture. ddagrab filter works fine and records the video in ffmpeg compiled for x86_64, but it does not work in ffmpeg compiled for x86_32. No files are created. No errors are printed.

How to reproduce:

% ffmpeg -v 9 -loglevel 99 -filter_complex ddagrab,hwdownload,format=bgra -c:v libx264 output.mp4

ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20220113
  configuration: --prefix=/ffmpeg --arch=x86_32 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --x86asmexe=yasm --extra-ldflags='-static-libgcc -static -lwinpthread -dynamic' --enable-pic --disable-static --enable-shared --disable-debug --disable-doc --enable-gpl --enable-libx264 --disable-bzlib --disable-iconv --disable-lzma --disable-sdl2 --disable-securetransport --disable-xlib --disable-zlib
  libavutil      58. 29.100 / 58. 29.100
  libavcodec     60. 31.102 / 60. 31.102
  libavformat    60. 16.100 / 60. 16.100
  libavdevice    60.  3.100 / 60.  3.100
  libavfilter     9. 12.100 /  9. 12.100
  libswscale      7.  5.100 /  7.  5.100
  libswresample   4. 12.100 /  4. 12.100
  libpostproc    57.  3.100 / 57.  3.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '99'.
Reading option '-filter_complex' ... matched as option 'filter_complex' (create a complex filtergraph) with argument 'ddagrab,hwdownload,format=bgra'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'libx264'.
Reading option 'output.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Applying option filter_complex (create a complex filtergraph) with argument ddagrab,hwdownload,format=bgra.
[AVFilterGraph @ 011263c0] Setting 'pix_fmts' to value 'bgra'
Successfully parsed a group of options.
Parsing a group of options: output url output.mp4.
Applying option c:v (codec name) with argument libx264.
Successfully parsed a group of options.
Opening an output file: output.mp4.
[out#0/mp4 @ 011204c0] Creating output stream from unlabeled output of complex filtergraph 0. This overrides automatic video mapping.
[vost#0:0/libx264 @ 01123800] Created video stream from complex filtergraph 0:[format:default]
[vost#0:0/libx264 @ 01123800] 
[AVFilterGraph @ 0112a800] Setting 'pix_fmts' to value 'bgra'
detected 20 logical cores
[format @ 0112dbc0] Setting 'pix_fmts' to value 'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21|yuv420p10le|yuv422p10le|yuv444p10le|nv20le|gray|gray10le'
[auto_scale_0 @ 0112e240] w:iw h:ih flags:'' interl:0
[format @ 0112dbc0] auto-inserting filter 'auto_scale_0' between the filter 'Parsed_format_2' and the filter 'format'
[AVFilterGraph @ 0112a800] query_formats: 5 queried, 3 merged, 1 already done, 0 delayed
[auto_scale_0 @ 0112e240] picking yuv444p out of 14 ref:bgra alpha:1
[Parsed_ddagrab_0 @ 0112af80] Created internal hw_device_ctx

This is all output.

Same command works in ffmpeg compiled for Windows x86_64:

% ffmpeg -v 9 -loglevel 99 -filter_complex ddagrab,hwdownload,format=bgra -c:v libx264 output.mp4

ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20220113
  configuration: --prefix=/ffmpeg --arch=x86_64 --target-os=mingw64 --cross-prefix=x86_64-w64-mingw32- --x86asmexe=yasm --extra-ldflags='-static-libgcc -static -lwinpthread -dynamic' --enable-pic --disable-static --enable-shared --disable-debug --disable-doc --enable-gpl --enable-libx264 --disable-bzlib --disable-iconv --disable-lzma --disable-sdl2 --disable-securetransport --disable-xlib --disable-zlib
  libavutil      58. 29.100 / 58. 29.100
  libavcodec     60. 31.102 / 60. 31.102
  libavformat    60. 16.100 / 60. 16.100
  libavdevice    60.  3.100 / 60.  3.100
  libavfilter     9. 12.100 /  9. 12.100
  libswscale      7.  5.100 /  7.  5.100
  libswresample   4. 12.100 /  4. 12.100
  libpostproc    57.  3.100 / 57.  3.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '99'.
Reading option '-filter_complex' ... matched as option 'filter_complex' (create a complex filtergraph) with argument 'ddagrab,hwdownload,format=bgra'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'libx264'.
Reading option 'output.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Applying option filter_complex (create a complex filtergraph) with argument ddagrab,hwdownload,format=bgra.
[AVFilterGraph @ 0000023372409f00] Setting 'pix_fmts' to value 'bgra'
Successfully parsed a group of options.
Parsing a group of options: output url output.mp4.
Applying option c:v (codec name) with argument libx264.
Successfully parsed a group of options.
Opening an output file: output.mp4.
[out#0/mp4 @ 0000023372407ac0] Creating output stream from unlabeled output of complex filtergraph 0. This overrides automatic video mapping.
[vost#0:0/libx264 @ 0000023372407000] Created video stream from complex filtergraph 0:[format:default]
[vost#0:0/libx264 @ 0000023372407000] 
[AVFilterGraph @ 00000233724075c0] Setting 'pix_fmts' to value 'bgra'
detected 20 logical cores
[format @ 0000023373d21cc0] Setting 'pix_fmts' to value 'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21|yuv420p10le|yuv422p10le|yuv444p10le|nv20le|gray|gray10le'
[auto_scale_0 @ 0000023373d22980] w:iw h:ih flags:'' interl:0
[format @ 0000023373d21cc0] auto-inserting filter 'auto_scale_0' between the filter 'Parsed_format_2' and the filter 'format'
[AVFilterGraph @ 00000233724075c0] query_formats: 5 queried, 3 merged, 1 already done, 0 delayed
[auto_scale_0 @ 0000023373d22980] picking yuv444p out of 14 ref:bgra alpha:1
[Parsed_ddagrab_0 @ 000002337240ed40] Created internal hw_device_ctx
[Parsed_ddagrab_0 @ 000002337240ed40] Using IDXGIOutput5 interface
[Parsed_ddagrab_0 @ 000002337240ed40] Opened dxgi output 0 with dimensions 1920x1080
[Parsed_ddagrab_0 @ 000002337240ed40] Updated pointer shape texture
[Parsed_ddagrab_0 @ 000002337240ed40] Probed 8 bit RGB frame format
[auto_scale_0 @ 0000023373d22980] w:1920 h:1080 fmt:bgra sar:1/1 -> w:1920 h:1080 fmt:yuv444p sar:1/1 flags:0x00000004
[out#0/mp4 @ 0000023372407ac0] No explicit maps, mapping streams automatically...
[file @ 0000023300b2b8c0] Setting default whitelist 'file,crypto,data'
Successfully opened the file.
Stream mapping:
  format:default -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[auto_scale_0 @ 0000023373d22980] w:1920 h:1080 fmt:bgra sar:1/1 -> w:1920 h:1080 fmt:yuv444p sar:1/1 flags:0x00000004
    Last message repeated 2 times
[libx264 @ 000002337240abc0] using mv_range_thread = 24
[libx264 @ 000002337240abc0] using SAR=1/1
[libx264 @ 000002337240abc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000002337240abc0] profile High 4:4:4 Predictive, level 4.0, 4:4:4, 8-bit
[libx264 @ 000002337240abc0] 264 - core 161 - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=30 lookahead_threads=5 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    encoder         : Lavf60.16.100
  Stream #0:0, 0, 1/15360: Video: h264, 1 reference frame (avc1 / 0x31637661), yuv444p(tv, unknown/bt709/iec61966-2-1, progressive), 1920x1080 (0x0) [SAR 1:1 DAR 16:9], 0/1, q=2-31, 30 fps, 15360 tbn
    Metadata:
      encoder         : Lavc60.31.102 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=    0 fps=0.0 q=0.0 size=       0kB time=N/A bitrate=N/A speed=N/A    
[Parsed_ddagrab_0 @ 000002337240ed40] Duplicated output frame
[vost#0:0/libx264 @ 0000023372407000] Clipping frame in rate conversion by 0.130669
[Parsed_ddagrab_0 @ 000002337240ed40] Duplicated output frame
    Last message repeated 4 times
...

I execute both commands in Windows 11 x64.

[Vadim Guchenko]

I tried the latest ffmpeg from the master branch and the issue is still there:

% ffmpeg -v 9 -loglevel 99 -filter_complex ddagrab,hwdownload,format=bgra output.mp4

ffmpeg version N-114276-g7f4b8d2f5e Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20220113
  configuration: --prefix=/ffmpeg --arch=x86_32 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --x86asmexe=yasm --enable-pic --enable-shared --disable-doc --disable-bzlib --disable-iconv --disable-lzma --disable-sdl2 --disable-securetransport --disable-xlib --disable-zlib
  libavutil      59.  2.100 / 59.  2.100
  libavcodec     61.  1.101 / 61.  1.101
  libavformat    61.  0.100 / 61.  0.100
  libavdevice    61.  0.100 / 61.  0.100
  libavfilter    10.  0.100 / 10.  0.100
  libswscale      8.  0.100 /  8.  0.100
  libswresample   5.  0.100 /  5.  0.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '99'.
Reading option '-filter_complex' ... matched as option 'filter_complex' (create a complex filtergraph) with argument 'ddagrab,hwdownload,format=bgra'.
Reading option 'output.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Applying option filter_complex (create a complex filtergraph) with argument ddagrab,hwdownload,format=bgra.
[AVFilterGraph @ 01f36380] Setting 'pix_fmts' to value 'bgra'
Successfully parsed a group of options.
Parsing a group of options: output url output.mp4.
Successfully parsed a group of options.
Opening an output file: output.mp4.
[out#0/mp4 @ 01f36640] Creating output stream from unlabeled output of complex filtergraph 0. This overrides automatic video mapping.
[vost#0:0/mpeg4 @ 01f32f00] Created video stream from complex filtergraph 0:[format:default]
[vost#0:0/mpeg4 @ 01f32f00] 
[out#0/mp4 @ 01f36640] No explicit maps, mapping streams automatically...
[file @ 01f34100] Setting default whitelist 'file,crypto,data'
Successfully opened the file.
Stream mapping:
  format:default -> Stream #0:0 (mpeg4)
[vost#0:0/mpeg4 @ 01f32f00] Starting thread...
[fc#0 @ 01f35f80] Starting thread...
Press [q] to stop, [?] for help
[AVFilterGraph @ 03850c80] Setting 'pix_fmts' to value 'bgra'
detected 20 logical cores
[format @ 038546c0] Setting 'pix_fmts' to value 'yuv420p'
[auto_scale_0 @ 01f3df00] w:iw h:ih flags:'' interl:0
[format @ 038546c0] auto-inserting filter 'auto_scale_0' between the filter 'Parsed_format_2' and the filter 'format'
[AVFilterGraph @ 03850c80] query_formats: 5 queried, 9 merged, 3 already done, 0 delayed
[Parsed_ddagrab_0 @ 03853c00] Created internal hw_device_ctx

[Vadim Guchenko]

I checked the Windows Event Log and it turned out that the error (Access Violation) is there:

Faulting application name: ffmpeg.exe, version: 0.0.0.0, time stamp: 0x00000000
Faulting module name: avfilter-10.dll, version: 10.0.100.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x002b7635
Faulting process id: 0x0x1F68
Faulting application start time: 0x0x1DA7A6A6BCE0914
Faulting application path: C:\src\win-x86\lib\ffmpeg.exe
Faulting module path: C:\src\win-x86\lib\avfilter-10.dll
Report Id: 0efdfd4c-f757-4d60-a6a5-5e29ab7d59d8
Faulting package full name: 
Faulting package-relative application ID: 

[Vadim Guchenko]

Using gdb for Windows:

...
[format @ 00cbb380] Setting 'pix_fmts' to value 'yuv420p'
[auto_scale_0 @ 04210f80] w:iw h:ih flags:'' interl:0
[format @ 00cbb380] auto-inserting filter 'auto_scale_0' between the filter 'Parsed_format_2' and the filter 'format'
[AVFilterGraph @ 04210a00] query_formats: 5 queried, 9 merged, 3 already done, 0 delayed
[New Thread 32328.0x50f4]
[New Thread 32328.0x6608]
[Parsed_ddagrab_0 @ 04211480] Created internal hw_device_ctx

Thread 6 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 32328.0x43cc]
0x0000002b in ?? ()

(gdb) bt
#0  0x0000002b in ?? ()
#1  0x78aea420 in vertex_shader_input_layout () from C:\src\win-x86\lib\avfilter-10.dll
#2  0x00cbb340 in ?? ()
Backtrace stopped: frame did not save the PC

(gdb) disass $pc-32,$pc+32
Dump of assembler code from 0xb to 0x4b:
   0x0000000b:  Cannot access memory at address 0xb

(gdb) info all-registers
eax            0x42115b8           69277112
ecx            0x4211480           69276800
edx            0x57                87
ebx            0x80000022          -2147483614
esp            0x4211540           0x4211540
ebp            0x4211540           0x4211540
esi            0x1                 1
edi            0x46cf014           74248212
eip            0x2b                0x2b
eflags         0x76a4694c          [ PF ZF TF OF NT AC ID ]
cs             0x0                 0
ss             0xc6ead0            13036240
ds             0x3cf000            3993600
es             0xc6fda0            13041056
fs             0xc6eaf0            13036272
gs             0x772f4770          1999587184
st0            <invalid float value> (raw 0x027f0000000078a47635)
st1            2.41246595419045934145e-4946 (raw 0x00000000000000010286)
st2            1.42719936927755029733e-4933 (raw 0x0000056efd1000000023)
st3            1.42719936927755032649e-4933 (raw 0x0000056efd100000002b)
st4            1.42719936927755032649e-4933 (raw 0x0000056efd100000002b)
st5            1.42719936927755032649e-4933 (raw 0x0000056efd100000002b)
st6            1.4271993692775504723e-4933 (raw 0x0000056efd1000000053)
st7            1.42719936927755032649e-4933 (raw 0x0000056efd100000002b)
fctrl          0x0                 0
fstat          0x0                 0
ftag           0x0                 0
fiseg          0x0                 0
fioff          0x0                 0
foseg          0x0                 0
fooff          0x0                 0
fop            0x0                 0
xmm0           {v4_float = {0x0, 0x0, 0xffffffff, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x7f, 0x2, 0x20, 0x1, 0x0, 0x0, 0x0, 0x0, 0x5f, 0x8e, 0xd0, 0x6c, 0x0, 0x0, 0x0, 0x0}, v8_int16 = {0x27f, 0x120, 0x0, 0x0, 0x8e5f, 0x6cd0, 0x0, 0x0}, v4_int32 = {0x120027f, 0x0, 0x6cd08e5f, 0x0}, v2_int64 = {0x120027f, 0x6cd08e5f}, uint128 = 0x6cd08e5f000000000120027f}
xmm1           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x20, 0x1, 0x0, 0x0, 0x0, 0x0, 0x5f, 0x8e, 0xd0, 0x6c, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v8_int16 = {0x120, 0x0, 0x0, 0x8e5f, 0x6cd0, 0x0, 0x0, 0x0}, v4_int32 = {0x120, 0x8e5f0000, 0x6cd0, 0x0}, v2_int64 = {0x8e5f000000000120, 0x6cd0}, uint128 = 0x6cd08e5f000000000120}
xmm2           {v4_float = {0x0, 0xffffffff, 0x0, 0x0}, v2_double = {0x7fffffffffffffff, 0x0}, v16_int8 = {0x0, 0x0, 0x0, 0x0, 0x5f, 0x8e, 0xd0, 0x6c, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v8_int16 = {0x0, 0x0, 0x8e5f, 0x6cd0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x6cd08e5f, 0x0, 0x0}, v2_int64 = {0x6cd08e5f00000000, 0x0}, uint128 = 0x6cd08e5f00000000}
xmm3           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 12 times>, 0xa0, 0x1f, 0x0, 0x0}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1fa0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x1fa0}, v2_int64 = {0x0, 0x1fa000000000}, uint128 = 0x1fa0000000000000000000000000}
xmm4           {v4_float = {0xffffffff, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x5f, 0x8e, 0xd0, 0x6c, 0x0 <repeats 12 times>}, v8_int16 = {0x8e5f, 0x6cd0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x6cd08e5f, 0x0, 0x0, 0x0}, v2_int64 = {0x6cd08e5f, 0x0}, uint128 = 0x6cd08e5f}
xmm5           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0, 0x0, 0x0, 0x0, 0xa0, 0x1f, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v8_int16 = {0x0, 0x0, 0x1fa0, 0x0, 0xffff, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x1fa0, 0xffff, 0x0}, v2_int64 = {0x1fa000000000, 0xffff}, uint128 = 0xffff00001fa000000000}
xmm6           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa0, 0x1f, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x1fa0, 0x0, 0xffff, 0x0}, v4_int32 = {0x0, 0x0, 0x1fa0, 0xffff}, v2_int64 = {0x0, 0xffff00001fa0}, uint128 = 0xffff00001fa00000000000000000}
xmm7           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 12 times>, 0xa0, 0x1f, 0x0, 0x0}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1fa0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x1fa0}, v2_int64 = {0x0, 0x1fa000000000}, uint128 = 0x1fa0000000000000000000000000}
mxcsr          0x0                 [ ]
mm0            {uint64 = 0x78a47635, v2_int32 = {0x78a47635, 0x0}, v4_int16 = {0x7635, 0x78a4, 0x0, 0x0}, v8_int8 = {0x35, 0x76, 0xa4, 0x78, 0x0, 0x0, 0x0, 0x0}}
mm1            {uint64 = 0x10286, v2_int32 = {0x10286, 0x0}, v4_int16 = {0x286, 0x1, 0x0, 0x0}, v8_int8 = {0x86, 0x2, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm2            {uint64 = 0x56efd1000000023, v2_int32 = {0x23, 0x56efd10}, v4_int16 = {0x23, 0x0, 0xfd10, 0x56e}, v8_int8 = {0x23, 0x0, 0x0, 0x0, 0x10, 0xfd, 0x6e, 0x5}}
mm3            {uint64 = 0x56efd100000002b, v2_int32 = {0x2b, 0x56efd10}, v4_int16 = {0x2b, 0x0, 0xfd10, 0x56e}, v8_int8 = {0x2b, 0x0, 0x0, 0x0, 0x10, 0xfd, 0x6e, 0x5}}
mm4            {uint64 = 0x56efd100000002b, v2_int32 = {0x2b, 0x56efd10}, v4_int16 = {0x2b, 0x0, 0xfd10, 0x56e}, v8_int8 = {0x2b, 0x0, 0x0, 0x0, 0x10, 0xfd, 0x6e, 0x5}}
mm5            {uint64 = 0x56efd100000002b, v2_int32 = {0x2b, 0x56efd10}, v4_int16 = {0x2b, 0x0, 0xfd10, 0x56e}, v8_int8 = {0x2b, 0x0, 0x0, 0x0, 0x10, 0xfd, 0x6e, 0x5}}
mm6            {uint64 = 0x56efd1000000053, v2_int32 = {0x53, 0x56efd10}, v4_int16 = {0x53, 0x0, 0xfd10, 0x56e}, v8_int8 = {0x53, 0x0, 0x0, 0x0, 0x10, 0xfd, 0x6e, 0x5}}
mm7            {uint64 = 0x56efd100000002b, v2_int32 = {0x2b, 0x56efd10}, v4_int16 = {0x2b, 0x0, 0xfd10, 0x56e}, v8_int8 = {0x2b, 0x0, 0x0, 0x0, 0x10, 0xfd, 0x6e, 0x5}}

[Vadim Guchenko]

The following patch fixes the problem:

diff --git a/libavfilter/vsrc_ddagrab.c b/libavfilter/vsrc_ddagrab.c
--- a/libavfilter/vsrc_ddagrab.c
+++ b/libavfilter/vsrc_ddagrab.c
@@ -178,7 +178,7 @@ static av_cold int init_dxgi_dda(AVFilterContext *avctx)
 #if HAVE_IDXGIOUTPUT5 && HAVE_DPI_AWARENESS_CONTEXT
     IDXGIOutput5 *dxgi_output5 = NULL;
 
-    typedef DPI_AWARENESS_CONTEXT (*set_thread_dpi_t)(DPI_AWARENESS_CONTEXT);
+    typedef DPI_AWARENESS_CONTEXT (__stdcall *set_thread_dpi_t)(DPI_AWARENESS_CONTEXT);
     set_thread_dpi_t set_thread_dpi;
     HMODULE user32_module;
 #endif