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  • 'pjsip-apps/Samples' Cannot functionally run vid_streamutil.c sample

    2 décembre 2020, par ShootingKIng

    Issue Description
After building[Build Varient=Debug, Build Config=x64] the latest pjproject-vs14 (retargeted to MSVS 2017, WINSDK=8.1, because my application works at these config) as per the build instruction on trac website. Successfully built pjsua and samples.

    


    I want to use only RTP + FFMPEG APIs (pjmedia) for my application from pjproject.

    


    My config_site.h

    


    #define PJMEDIA_HAS_VIDEO           1
#define PJMEDIA_HAS_FFMPEG          1


    


    FFMPEG (pre build from ffmpeg-N-100121-g052b4c3481-win64-gpl-shared.zip)

    


    But running the example, vid_streamutil.c did not work as expected (? Whats the normal expected behaviour ?).
It says

    


    ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)


    


    To Reproduce
Steps to reproduce the behavior :

    


      

    1. run vid_streamutil.exe with parameter : --codec=H264 --remote=127.0.0.1:5000 --play-file=test.avi --send-only
(test.avi file being a sample file)

      2. 


    


    Expected behavior
Get some RTP packets in wireshark while listening to ports 4000 and 5000 maybe ? I dont know whats the expected behaviour, documentation dosent say anything about this :(

    


    Logs/Screenshots
Couldn't catch anything on Wireshark.
Console log of vid_streamutil.exe is

    


    vid_streamutil.exe --codec=H264 --remote=127.0.0.1:5000 --send-only --play-file=test.avi
10:25:24.757 os_core_win32. !pjlib 2.10 for win32 initialized
 
10:25:24.840     wmme_dev.c  WMME found 12 devices:
10:25:24.858     wmme_dev.c   dev_id 0: Wave mapper  (in=2, out=2)
10:25:24.860     wmme_dev.c   dev_id 1: Headset Microphone (Arctis 7 Ch  (in=2, out=0)
10:25:24.860     wmme_dev.c   dev_id 2: Microphone (AMM Virtual Audio D  (in=2, out=0)
10:25:24.861     wmme_dev.c   dev_id 3: CABLE Output (VB-Audio Virtual   (in=2, out=0)
10:25:24.864     wmme_dev.c   dev_id 4: VoiceMeeter Output (VB-Audio Vo  (in=2, out=0)
10:25:24.864     wmme_dev.c   dev_id 5: Microphone (Realtek Audio)  (in=2, out=0)
10:25:24.865     wmme_dev.c   dev_id 6: Headphones (Arctis 7 Game)  (in=0, out=2)
10:25:24.866     wmme_dev.c   dev_id 7: Speakers / Headphones (Realtek   (in=0, out=2)
10:25:24.867     wmme_dev.c   dev_id 8: VoiceMeeter Input (VB-Audio Voi  (in=0, out=2)
10:25:24.884     wmme_dev.c   dev_id 9: Headset Earphone (Arctis 7 Chat  (in=0, out=2)
10:25:24.885     wmme_dev.c   dev_id 10: Speakers (AMM Virtual Audio Dev  (in=0, out=2)
10:25:24.887     wmme_dev.c   dev_id 11: Speakers (VB-Audio Virtual Cabl  (in=0, out=2)
10:25:24.887     wmme_dev.c  WMME initialized
10:25:24.890          pjlib  select() I/O Queue created (0000016B2C5F9608)
10:25:24.892 colorbar_dev.c  Colorbar video src initialized with 2 device(s):
10:25:24.915 colorbar_dev.c   0: Colorbar generator
10:25:24.935 colorbar_dev.c   1: Colorbar-active
10:25:24.956   avi_player.c  The AVI file has 2 streams.
10:25:24.976   avi_player.c  AVI file player 'test.avi' created with 2 media ports
10:25:24.994 vid_streamutil  Reading video stream 1280x720 H264 @30.00fps
10:25:25.033          rtp.c  pjmedia_rtp_session_init: ses=0000016B2C6793C8, default_pt=97, ssrc=0x294823
10:25:25.053 vstdec0000016B  Decoding channel created 720x480 I420<-H264 22/1(~22)fps
10:25:25.054          rtp.c  pjmedia_rtp_session_init: ses=0000016B2C62DF1C, default_pt=97, ssrc=0x294823
10:25:25.057 vstenc0000016B  Encoding channel created 1280x720 I420->H264 30/1(~30)fps
10:25:25.060 udp0000016B2C6  SO_RCVBUF set to 65536
10:25:25.061 udp0000016B2C6  SO_SNDBUF set to 65536
10:25:25.062   vid_stream.c  Video stream vstrm0000016B2C678508 created
10:25:25.086 vstenc0000016B  Encoder stream started
10:25:25.104 vstdec0000016B  Decoder stream paused
 [VID_STEAMUTIL] Stream is active, dir is send-only, sending to 127.0.0.1:5000
10:25:25.114 vid_streamutil  Sending 1280x720 H264 @30.00fps

Commands:
  q     Quit

Command: 10:25:25.147 ffmpeg_vid_cod !ffmpeg err -22: Invalid argument
10:25:25.222 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.237 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.250 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.251 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.287 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.311 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.316 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.341 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.353 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.369 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.386 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.387 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.411 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.415 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.452 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.469 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.486 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.496 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.506 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.527 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.547 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.568 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.576 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.604 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.606 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.627 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.648 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.668 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.686 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.711 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.731 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.752 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.769 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.778 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.804 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.827 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.833 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.868 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.886 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.895 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.921 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.923 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.943 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:25.963 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:25.983 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.003 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.019 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.038 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.041 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.060 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.081 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.086 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.109 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.130 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.138 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.162 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.183 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.202 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.220 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.228 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.260 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.281 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.312 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.321 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.321 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.322 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.323 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.323 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.324 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.324 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.333 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.353 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.353 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.381 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.401 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.414 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.429 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.449 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.469 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.480 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.510 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.531 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.553 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.571 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.594 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.615 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.636 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.653 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.671 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.678 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.714 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.736 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.754 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.777 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.781 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
10:25:26.816 ffmpeg_vid_cod  ffmpeg err -22: Invalid argument
10:25:26.836 vstenc0000016B  Codec encode_begin() error: Codec internal creation error (PJMEDIA_CODEC_EFAILED)
EOF while reading stdin, will quit now..

Commands:
  q     Quit

^C


    


    Desktop information :

    


      

    • OS, Distribution & Version : MS Windows 10 Home, 1909

      • 


    • PJSIP

        

      • version : 2.10

        • 


      • applied patch(es) : Nothing Extra

        • 


      • configure script params : Default

        • 


      • config_site.h contents : Aforementioned

        • 


      • related third party libraries & versions :
FFMPEG 4.3

        • 


      


      • 


    


    #define LIBAVCODEC_VERSION_MAJOR  58
#define LIBAVCODEC_VERSION_MINOR  91
#define LIBAVCODEC_VERSION_MICRO 100


    


    Additional context
I didnt change the default program that must except adding some printf's when program goes to exit label, without this it will be very difficult to know which part of the program jumped to exit : label. Anyways, here is the full code,

    


    vid_streamutil.c (with printfs)

    


    Any help is appreciated ^^'
Thanks.

    


  • Windows Ffmpeg - send audio to sound card's output

    30 mars 2021, par halitsafa

    I have a sound card (Behringer UMC202HD) which connected to a Windows 10 computer by usb cable, i am able to recieve audio from input device with the following ffmpeg command :
ffmpeg -f dshow -i audio="IN 1-2 (BEHRINGER UMC 202HD 192k)" -map_channel 0.0.0 -c:a pcm_s24le first_channel.wav -map_channel 0.0.1 -c:a pcm_s24le second_channel.wav

    


    But i can't send audio to sound card's output with the ffmpeg, is there any way to do this ? if there is, how can i do it ?

    


    Linux version (pseudo command) of what i'm trying to do in Windows :

    


    ffmpeg -i my_input.wav -f alsa alsa.behringer_out

    


  • Webcam recording with FFmpeg through USB over UTP

    13 septembre 2021, par z32a7ul

    I'm trying to record my webcam with FFmpeg.

    


    I listed the devices with this line :

    


    ffmpeg -list_devices true -f dshow -i dummy


    


    And I test the settings with this one :

    


    ffplay -loglevel verbose -f dshow -rtbufsize 100M -video_size 1280x720 -framerate 60 -video_device_number 0 -audio_device_number 0 -i video="C922 Pro Stream Webcam":audio="Microphone (C922 Pro Stream Web"


    


    The first command outputs this :

    


    ffmpeg version n4.4-10-g75c3969292 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[dshow @ 000000000035a000] DirectShow video devices (some may be both video and audio devices)
[dshow @ 000000000035a000]  "C922 Pro Stream Webcam"
[dshow @ 000000000035a000]     Alternative name "@device_pnp_\\?\usb#vid_046d&pid_085c&mi_00#9&1da24ac&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 000000000035a000] DirectShow audio devices
[dshow @ 000000000035a000]  "Microphone (C922 Pro Stream Web"
[dshow @ 000000000035a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (C922 Pro Stream Web"
[dshow @ 000000000035a000]  "Microphone (Realtek High Defini"
[dshow @ 000000000035a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (Realtek High Defini"
dummy: Immediate exit requested


    


    And the second one this :

    


    ffplay version n4.4-10-g75c3969292 Copyright (c) 2003-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Initialized direct3d renderer.
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
dshow passing through packet of type video size   170103 timestamp 2074640340000 orig timestamp 2074640336004 graph timestamp 2074640340000 diff 3996 C922 Pro Stream Webcam
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
dshow passing through packet of type video size   166381 timestamp 2074640500000 orig timestamp 2074640502670 graph timestamp 2074640500000 diff -2670 C922 Pro Stream Webcam
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
dshow passing through packet of type video size   173348 timestamp 2074640820000 orig timestamp 2074640816017 graph timestamp 2074640820000 diff 3983 C922 Pro Stream Webcam
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
...


    


    However, if I use a USB cable extender (USB over UTP - This thing consist of two parts : the first one has a male, the second one a female USB A, and they are linked through RJ45 sockets and a Cat5e UTP cable), it does not work at all. The first command prints the same :

    


    ffmpeg version n4.4-10-g75c3969292 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[dshow @ 000000000039a000] DirectShow video devices (some may be both video and audio devices)
[dshow @ 000000000039a000]  "C922 Pro Stream Webcam"
[dshow @ 000000000039a000]     Alternative name "@device_pnp_\\?\usb#vid_046d&pid_085c&mi_00#9&1da24ac&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 000000000039a000] DirectShow audio devices
[dshow @ 000000000039a000]  "Microphone (C922 Pro Stream Web"
[dshow @ 000000000039a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (C922 Pro Stream Web"
[dshow @ 000000000039a000]  "Microphone (Realtek High Defini"
[dshow @ 000000000039a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (Realtek High Defini"
dummy: Immediate exit requested


    


    But the second fails with "Could not set video options" :

    


    ffplay version n4.4-10-g75c3969292 Copyright (c) 2003-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Initialized direct3d renderer.
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   

[dshow @ 00000000004de180] Could not set video options
video=C922 Pro Stream Webcam:audio=Microphone (C922 Pro Stream Web: I/O error


    


    What can be the problem ? Is it the extender cable ? What are FFmpeg's requirement on USB cables (and extenders) ?

    


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