ffmpeg crashes in video capture on windows 10

[Rafael]

Summary of the bug:

I am trying to capture video in windows 10. On first run it works correctly, but after period I try again and the command does not work anymore, gets stuck in message "Selecting pin Audio Out on audio only". In order to work again I have to restart the computer.

How to reproduce:

C:\ultravideo>ffmpeg -y -v 9 -loglevel 99 -report -framerate 25 -vsync 1 -video_size 720x480 -f dshow -rtbufsize 250000k -crossbar_video_input_pin_number 0 -crossbar_audio_input_pin_number 2 -i video="Conexant Polaris Video Capture":audio="Conexant Polaris Audio Capture" out.mp4
ffmpeg started on 2018-03-07 at 18:18:03
Report written to "ffmpeg-20180307-181803.log"
ffmpeg version N-90242-g5ab0ecf283 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7.3.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
  libavutil      56.  8.100 / 56.  8.100
  libavcodec     58. 13.102 / 58. 13.102
  libavformat    58. 10.100 / 58. 10.100
  libavdevice    58.  2.100 / 58.  2.100
  libavfilter     7. 12.100 /  7. 12.100
  libswscale      5.  0.102 /  5.  0.102
  libswresample   3.  0.101 /  3.  0.101
  libpostproc    55.  0.100 / 55.  0.100
Splitting the commandline.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
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 '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-framerate' ... matched as AVOption 'framerate' with argument '25'.
Reading option '-vsync' ... matched as option 'vsync' (video sync method) with argument '1'.
Reading option '-video_size' ... matched as AVOption 'video_size' with argument '720x480'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'dshow'.
Reading option '-rtbufsize' ... matched as AVOption 'rtbufsize' with argument '250000k'.
Reading option '-crossbar_video_input_pin_number' ... matched as AVOption 'crossbar_video_input_pin_number' with argument '0'.
Reading option '-crossbar_audio_input_pin_number' ... matched as AVOption 'crossbar_audio_input_pin_number' with argument '2'.
Reading option '-i' ... matched as input url with argument 'video=Conexant Polaris Video Capture:audio=Conexant Polaris Audio Capture'.
Reading option 'out.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option v (set logging level) with argument 9.
Applying option report (generate a report) with argument 1.
Applying option vsync (video sync method) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url video=Conexant Polaris Video Capture:audio=Conexant Polaris Audio Capture.
Applying option f (force format) with argument dshow.
Successfully parsed a group of options.
Opening an input file: video=Conexant Polaris Video Capture:audio=Conexant Polaris Audio Capture.
[dshow @ 000002961f2bc080] Selecting pin Capturar on video
[dshow @ 000002961f2bc080] Crossbar Switching Information for Conexant Polaris Video Capture:
[dshow @ 000002961f2bc080] Routing video input from pin 0
[dshow @ 000002961f2bc080]   Crossbar Output pin 0: "Video Decoder" related output pin: 1 current input pin: 0 compatible input pins: 0 1
[dshow @ 000002961f2bc080] Routing audio input from pin 2
[dshow @ 000002961f2bc080]   Crossbar Output pin 1: "Audio Decoder" related output pin: 0 current input pin: 2 compatible input pins: 2
[dshow @ 000002961f2bc080]   Crossbar Input pin 0 - "S-Video" related input pin: 2
[dshow @ 000002961f2bc080]   Crossbar Input pin 1 - "Video Composite" related input pin: 2
[dshow @ 000002961f2bc080]   Crossbar Input pin 2 - "Audio Line" related input pin: 1
[dshow @ 000002961f2bc080] not reusing previous graph capture filter @device_pnp_\\?\usb#vid_1f4d&pid_0102&mi_01#6&31956d8d&0&0001#{33d9a762-90c8-11d0-bd43-00a0c911ce86}\{5eaf914d-2212-4034-8c4c-02cafd15d68a} != @device_pnp_\\?\usb#vid_1f4d&pid_0102&mi_01#6&31956d8d&0&0001#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\{9b365890-165f-11d0-a195-0020afd156e4}
[dshow @ 000002961f2bc080] Selecting pin Audio Out on audio only

The FFMPEG process is running and using 25% CPU and when I close it displays the following information:

Received windows signal 0
[dshow @ 000002961f2bc080] interrupted
[dshow @ 000002961f2bc080] stream 0: start_time: -922337203685.478 duration: -922337203685.478
[dshow @ 000002961f2bc080] stream 1: start_time: -922337203685.478 duration: -922337203685.478
[dshow @ 000002961f2bc080] format: start_time: -9223372036854.775 duration: -9223372036854.775 bitrate=0 kb/s
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, dshow, from 'video=Conexant Polaris Video Capture:audio=Conexant Polaris Audio Capture':
  Duration: N/A, bitrate: N/A
    Stream #0:0, 0, 1/10000000: Video: rawvideo, 1 reference frame (UYVY / 0x59565955), uyvy422, 720x480 (0x0), 0/1, 25 fps, 25 tbr, 10000k tbn, 10000k tbc
    Stream #0:1, 0, 1/10000000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Successfully opened the file.
Parsing a group of options: output url out.mp4.
Successfully parsed a group of options.
Opening an output file: out.mp4.
[file @ 000002961f368200] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
Finishing stream 0:0 without any data written to it.
detected 4 logical cores
[graph 0 input from stream 0:0 @ 000002961f941e80] Setting 'video_size' to value '720x480'
[graph 0 input from stream 0:0 @ 000002961f941e80] Setting 'pix_fmt' to value '15'
[graph 0 input from stream 0:0 @ 000002961f941e80] Setting 'time_base' to value '1/10000000'
[graph 0 input from stream 0:0 @ 000002961f941e80] Setting 'pixel_aspect' to value '0/1'
[graph 0 input from stream 0:0 @ 000002961f941e80] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 000002961f941e80] Setting 'frame_rate' to value '10000000/400000'
[graph 0 input from stream 0:0 @ 000002961f941e80] w:720 h:480 pixfmt:uyvy422 tb:1/10000000 fr:10000000/400000 sar:0/1 sws_param:flags=2
[format @ 000002961f36f800] Setting 'pix_fmts' to value 'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21|yuv420p10le|yuv422p10le|yuv444p10le|nv20le'
[auto_scaler_0 @ 000002961f371140] Setting 'flags' to value 'bicubic'
[auto_scaler_0 @ 000002961f371140] w:iw h:ih flags:'bicubic' interl:0
[format @ 000002961f36f800] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_null_0' and the filter 'format'
[AVFilterGraph @ 000002961f9415c0] query_formats: 4 queried, 2 merged, 1 already done, 0 delayed
[auto_scaler_0 @ 000002961f371140] picking yuv422p out of 11 ref:uyvy422 alpha:0
[auto_scaler_0 @ 000002961f371140] w:720 h:480 fmt:uyvy422 sar:0/1 -> w:720 h:480 fmt:yuv422p sar:0/1 flags:0x4
[libx264 @ 000002961f2dae40] using mv_range_thread = 40
[libx264 @ 000002961f2dae40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000002961f2dae40] profile High 4:2:2, level 3.0, 4:2:2 8-bit
[libx264 @ 000002961f2dae40] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=-2 threads=6 lookahead_threads=1 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
Finishing stream 0:1 without any data written to it.
[graph_1_in_0_1 @ 00000296202b9100] Setting 'time_base' to value '1/48000'
[graph_1_in_0_1 @ 00000296202b9100] Setting 'sample_rate' to value '48000'
[graph_1_in_0_1 @ 00000296202b9100] Setting 'sample_fmt' to value 's16'
[graph_1_in_0_1 @ 00000296202b9100] Setting 'channel_layout' to value '0x3'
[graph_1_in_0_1 @ 00000296202b9100] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
[format_out_0_1 @ 00000296202b8a00] Setting 'sample_fmts' to value 'fltp'
[format_out_0_1 @ 00000296202b8a00] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[format_out_0_1 @ 00000296202b8a00] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[AVFilterGraph @ 000002961f373b00] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto_resampler_0 @ 00000296202b8900] [SWR @ 000002961faba000] Using s16p internally between filters
[auto_resampler_0 @ 00000296202b8900] ch:2 chl:stereo fmt:s16 r:48000Hz -> ch:2 chl:stereo fmt:fltp r:48000Hz
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf58.10.100
    Stream #0:0, 0, 1/12800: Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv422p, 720x480, 0/1, q=-1--1, 25 fps, 12800 tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.13.102 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1, 0, 1/48000: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, delay 1024, 128 kb/s
    Metadata:
      encoder         : Lavc58.13.102 aac
frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (video=Conexant Polaris Video Capture:audio=Conexant Polaris Audio Capture):
  Input stream #0:0 (video): 0 packets read (0 bytes); 0 frames decoded;
  Input stream #0:1 (audio): 0 packets read (0 bytes); 0 frames decoded (0 samples);
  Total: 0 packets (0 bytes) demuxed
Output file #0 (out.mp4):
  Output stream #0:0 (video): 0 frames encoded; 0 packets muxed (0 bytes);
  Output stream #0:1 (audio): 0 frames encoded (0 samples); 0 packets muxed (0 bytes);
  Total: 0 packets (0 bytes) muxed
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 000002961f3682c0] Statistics: 2 seeks, 3 writeouts
[aac @ 000002961f2dcc40] Qavg: nan
dshow passing through packet of type video size        0 timestamp 300922280000 orig timestamp 2968970887735200 graph timestamp 300922280000 diff -2968669965455200 Conexant Polaris Video Capture
Exiting normally, received signal 2.

Does anyone know what may be happening?