http://cadelonmall.com/index/detail.html?sno=MTQzOTQ2NDUy&coll_id=999953792&from=facebook&utm_content=23848538529040484&adset_id=23848538537250484&ad_id=23848538537610484&opt_id=32917&fbclid=IwAR3tH-rSk3KSQeo5h-MejMfz3Ep1s0TAKrNu6ISyNXfA6yMATmW7F_EujFQ

http://www.11st.co.kr/products/2752056659/share

Intel HD530 : Hardware codec support

웹 비디오 코덱 가이드

https://developer.mozilla.org/ko/docs/Web/Media/Formats/Video_codecs

FFmpeg VP8 Encoding Options

http://wiki.webmproject.org/ffmpeg

https://developers.google.com/media/vp9/live-encoding?hl=ko

1. See the encoder options

c:\> ffmpeg -h encoder=vp9_qsv
...
Encoder vp9_qsv [VP9 video (Intel Quick Sync Video acceleration)]:
    General capabilities: delay hybrid
    Threading capabilities: none
    Supported hardware devices: qsv qsv qsv
    Supported pixel formats: nv12 p010le qsv
vp9_qsv encoder AVOptions:
  -async_depth       <int>        E..V....... Maximum processing parallelism (from 1 to INT_MAX) (default 4)
  -avbr_accuracy     <int>        E..V....... Accuracy of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)
  -avbr_convergence  <int>        E..V....... Convergence of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)
  -preset            <int>        E..V....... (from 1 to 7) (default medium)
     veryfast        7            E..V.......
     faster          6            E..V.......
     fast            5            E..V.......
     medium          4            E..V.......
     slow            3            E..V.......
     slower          2            E..V.......
     veryslow        1            E..V.......
  -rdo               <int>        E..V....... Enable rate distortion optimization (from -1 to 1) (default -1)
  -max_frame_size    <int>        E..V....... Maximum encoded frame size in bytes (from -1 to 65535) (default -1)
  -max_slice_size    <int>        E..V....... Maximum encoded slice size in bytes (from -1 to 65535) (default -1)
  -bitrate_limit     <int>        E..V....... Toggle bitrate limitations (from -1 to 1) (default -1)
  -mbbrc             <int>        E..V....... MB level bitrate control (from -1 to 1) (default -1)
  -extbrc            <int>        E..V....... Extended bitrate control (from -1 to 1) (default -1)
  -adaptive_i        <int>        E..V....... Adaptive I-frame placement (from -1 to 1) (default -1)
  -adaptive_b        <int>        E..V....... Adaptive B-frame placement (from -1 to 1) (default -1)
  -b_strategy        <int>        E..V....... Strategy to choose between I/P/B-frames (from -1 to 1) (default -1)
  -forced_idr        <boolean>    E..V....... Forcing I frames as IDR frames (default false)
  -low_power         <boolean>    E..V....... enable low power mode(experimental: many limitations by mfx version, BRC modes, etc.) (default false)
  -profile           <int>        E..V....... (from 0 to INT_MAX) (default unknown)
     unknown         0            E..V.......
     profile0        1            E..V.......
     profile1        2            E..V.......
     profile2        3            E..V.......
     profile3        4            E..V.......
c:\>

2. vpp_qsv filter usage

c:\> ffmpeg -h filter=vpp_qsv
...
Filter vpp_qsv
  Quick Sync Video VPP.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
vpp_qsv AVOptions:
  deinterlace       <int>        ..FV....... deinterlace mode: 0=off, 1=bob, 2=advanced (from 0 to 2) (default 0)
     bob             1            ..FV....... Bob deinterlace mode.
     advanced        2            ..FV....... Advanced deinterlace mode.
  denoise           <int>        ..FV....... denoise level [0, 100] (from 0 to 100) (default 0)
  detail            <int>        ..FV....... enhancement level [0, 100] (from 0 to 100) (default 0)
  framerate         <rational>   ..FV....... output framerate (from 0 to DBL_MAX) (default 0/1)
  procamp           <int>        ..FV....... Enable ProcAmp (from 0 to 1) (default 0)
  hue               <float>      ..FV....... ProcAmp hue (from -180 to 180) (default 0)
  saturation        <float>      ..FV....... ProcAmp saturation (from 0 to 10) (default 1)
  contrast          <float>      ..FV....... ProcAmp contrast (from 0 to 10) (default 1)
  brightness        <float>      ..FV....... ProcAmp brightness (from -100 to 100) (default 0)
  transpose         <int>        ..FV....... set transpose direction (from -1 to 6) (default -1)
     cclock_hflip    0            ..FV....... rotate counter-clockwise with horizontal flip
     clock           1            ..FV....... rotate clockwise
     cclock          2            ..FV....... rotate counter-clockwise
     clock_hflip     3            ..FV....... rotate clockwise with horizontal flip
     reversal        4            ..FV....... rotate by half-turn
     hflip           5            ..FV....... flip horizontally
     vflip           6            ..FV....... flip vertically
  cw                <string>     ..FV....... set the width crop area expression (default "iw")
  ch                <string>     ..FV....... set the height crop area expression (default "ih")
  cx                <string>     ..FV....... set the x crop area expression (default "(in_w-out_w)/2")
  cy                <string>     ..FV....... set the y crop area expression (default "(in_h-out_h)/2")
  w                 <string>     ..FV....... Output video width (default "cw")
  width             <string>     ..FV....... Output video width (default "cw")
  h                 <string>     ..FV....... Output video height (default "w*ch/cw")
  height            <string>     ..FV....... Output video height (default "w*ch/cw")
  format            <string>     ..FV....... Output pixel format (default "same")
  async_depth       <int>        ..FV....... Internal parallelization depth, the higher the value the higher the latency. (from 0 to INT_MAX) (default 0)

c:\>

c:\> ffmpeg -h encoder=hevc_qsv
...
Encoder hevc_qsv [HEVC (Intel Quick Sync Video acceleration)]:
    General capabilities: delay hybrid
    Threading capabilities: none
    Supported hardware devices: qsv qsv qsv
    Supported pixel formats: nv12 p010le qsv
hevc_qsv encoder AVOptions:
  -async_depth       <int>        E..V....... Maximum processing parallelism (from 1 to INT_MAX) (default 4)
  -avbr_accuracy     <int>        E..V....... Accuracy of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)
  -avbr_convergence  <int>        E..V....... Convergence of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)
  -preset            <int>        E..V....... (from 1 to 7) (default medium)
     veryfast        7            E..V.......
     faster          6            E..V.......
     fast            5            E..V.......
     medium          4            E..V.......
     slow            3            E..V.......
     slower          2            E..V.......
     veryslow        1            E..V.......
  -rdo               <int>        E..V....... Enable rate distortion optimization (from -1 to 1) (default -1)
  -max_frame_size    <int>        E..V....... Maximum encoded frame size in bytes (from -1 to 65535) (default -1)
  -max_slice_size    <int>        E..V....... Maximum encoded slice size in bytes (from -1 to 65535) (default -1)
  -bitrate_limit     <int>        E..V....... Toggle bitrate limitations (from -1 to 1) (default -1)
  -mbbrc             <int>        E..V....... MB level bitrate control (from -1 to 1) (default -1)
  -extbrc            <int>        E..V....... Extended bitrate control (from -1 to 1) (default -1)
  -adaptive_i        <int>        E..V....... Adaptive I-frame placement (from -1 to 1) (default -1)
  -adaptive_b        <int>        E..V....... Adaptive B-frame placement (from -1 to 1) (default -1)
  -b_strategy        <int>        E..V....... Strategy to choose between I/P/B-frames (from -1 to 1) (default -1)
  -forced_idr        <boolean>    E..V....... Forcing I frames as IDR frames (default false)
  -low_power         <boolean>    E..V....... enable low power mode(experimental: many limitations by mfx version, BRC modes, etc.) (default false)
  -idr_interval      <int>        E..V....... Distance (in I-frames) between IDR frames (from -1 to INT_MAX) (default 0)
     begin_only      -1           E..V....... Output an IDR-frame only at the beginning of the stream
  -load_plugin       <int>        E..V....... A user plugin to load in an internal session (from 0 to 2) (default hevc_hw)
     none            0            E..V.......
     hevc_sw         1            E..V.......
     hevc_hw         2            E..V.......
  -load_plugins      <string>     E..V....... A :-separate list of hexadecimal plugin UIDs to load in an internal session (default "")
  -profile           <int>        E..V....... (from 0 to INT_MAX) (default unknown)
     unknown         0            E..V.......
     main            1            E..V.......
     main10          2            E..V.......
     mainsp          3            E..V.......
     rext            4            E..V.......
  -gpb               <boolean>    E..V....... 1: GPB (generalized P/B frame); 0: regular P frame (default true)
  -tile_cols         <int>        E..V....... Number of columns for tiled encoding (from 0 to 65535) (default 0)
  -tile_rows         <int>        E..V....... Number of rows for tiled encoding (from 0 to 65535) (default 0)

c:\>

http://www.webdav.org/projects/

$ sudo apt update
$ sudo apt upgrade

*) nginx 웹서버 설치
$ sudo apt install nginx nginx-full

*) rtmp 모듈 설치 
$ sudo apt install libnginx-mod-rtmp

*) ngx-mod-http-headers-more-filter 모듈 설치
$ sudo apt install libnginx-mod-http-headers-more-filter

*권장) 모든 모듈 설치
$ sudo apt install libnginx*
$ sudo apt-get install nginx-extras

*) webdav 폴더 생성
$ sudo mkdir /var/www/webdav
*) webdav 폴더 사용자 설정
$ sudo chown www-data:www-data /var/www/webdav

$ sudo service nginx reload

*) webdev 사용자 설정
$ sudo apt install apache2-utils
$ htpasswd -c webdavpw.pwd user01
New password:
Re-type new password:
Adding password for user user01
$ cat ~/webdavpw.pwd
user01:$apr1$Q2AMD3rm$iA89QhjsV5v.Rk5GANgtO/

$ sudo vi /etc/nginx/webdavpw.pwd
user01:$apr1$Q2AMD3rm$iA89QhjsV5v.Rk5GANgtO/

$ sudo vi /etc/nginx/nginx.conf
...

http {
        dav_ext_lock_zone zone=pi:10m;
...

$ sudo vi /etc/nginx/sites-available/default
...
# 이곳을 찾어
        location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                try_files $uri $uri/ =404;
                
# 이렇게 추가 해준다. 
                location /webdav {
                        charset utf-8;
                        alias /var/www/webdav;
                        autoindex on;

                        auth_basic "WebDAV Page";
                        auth_basic_user_file /etc/nginx/webdavpw.pwd;

                        dav_methods PUT DELETE MKCOL COPY MOVE;
                        dav_ext_methods PROPFIND OPTIONS LOCK UNLOCK;
                        dav_ext_lock zone=pi;
                        dav_access user:rw group:rw all:r;

                        client_max_body_size 0;
                        create_full_put_path on;
                        
                        DAVMinTimeout 600;
                }
# 여기까지 추가 해준다,
        }
...
$ sudo service nginx reload

$ curl -T 업로드파일명 -u 사용자ID:PASSWD http://localhost/webdav

$ sudo apt-get install cadaver
$ cadaver http://localhost/webdav
...
Could not access /webdav/ (not WebDAV-enabled?):
404 Not Found <==== alias 지정 경로에 폴더가 없을때 mkdir /var/www/wedav; chown www-data:www-data /var/www/webdav
...
탐색기에서 파일 생성 할 때 : 0x8000ffff
...
탐색기에서 폴더 생성 할 때 : 0x80070021
...

*) Windows 10에서 webDAV연결 하기

파일 탐색기
==> 내PC : 선택 후
==> 창 상단 : 컴퓨터
==> 네트워크 드라이브 연결
==> 폴더 란에 : http://192.168.0.99/webdav
...

설정 후

파일 탐색기
==> 내PC : 오른쪽 마우스 
==> 네트워크 위치 추가

*) Windows 10에서 WebClient 설정 하기

*) regedit
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters
===> FileSizeLimitInBytes : 4194304000 (4GB)로 수정
===> BasicAuthLevel : 2 로 수정

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000YGytCAG&l=ko-KR
https://doc.cuba-platform.com/webdav-2.5/
https://docs.microsoft.com/en-us/troubleshoot/windows-client/networking/cannot-automatically-reconnect-dav-share

https://docs.microsoft.com/en-us/previous-versions/office/developer/exchange-server-2003/aa142897(v=exchg.65)
https://docs.oracle.com/cd/E19857-01/817-7510/agdav.html

*) PROPPATCH 기능 있는 모듈 설치 하기

https://hev.cc/2921.html

$ git clone --depth 1 https://github.com/heiher/nginx
$ cd nginx
$ git clone --depth 1 https://github.com/heiher/nginx-dav-ext-module
$ sudo apt install libpcre3-dev libxslt1-dev libgeoip-dev

$ ./auto/configure --prefix=/opt/nginx \
--with-compat  \
--with-file-aio  \
--with-http_addition_module  \
--with-http_auth_request_module  \
--with-http_dav_module  \
--with-http_degradation_module  \
--with-http_flv_module   \
--with-http_geoip_module  \
--with-http_gunzip_module  \
--with-http_gzip_static_module  \
--with-http_mp4_module  \
--with-http_realip_module  \
--with-http_secure_link_module  \
--with-http_slice_module  \
--with-http_ssl_module  \
--with-http_stub_status_module  \
--with-http_sub_module  \
--with-http_v2_module  \
--with-pcre-jit  \
--with-threads \
--add-module=nginx-dav-ext-module

https://www.sitecom.com/en/usb-c-hub-4-port/cn-385/p/1879

https://superuser.com/questions/1381139/why-cant-i-find-a-usb-c-hub-with-multiple-usb-c-ports

*) av_rpi_zc_ref: *** Format not SAND/YUV420P

ffmpeg -i input.mp4 -vf format=yuv420p output.mp4

c:\>ffmpeg -list_devices true -f dshow -i dummy

[dshow @ 00000235dde42940] DirectShow video devices (some may be both video and audio devices)
[dshow @ 00000235dde42940]  "USB3. 0 capture"
[dshow @ 00000235dde42940]     Alternative name "@device_pnp_\\?\usb#vid_534d&pid_2109&mi_00#7&3b7e634&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 00000235dde42940]  "ATIV Real HD Camera"
[dshow @ 00000235dde42940]     Alternative name "@device_pnp_\\?\usb#vid_2232&pid_1078&mi_00#6&10a3a3d8&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 00000235dde42940]  "OBS Virtual Camera"
[dshow @ 00000235dde42940]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{A3FCE0F5-3493-419F-958A-ABA1250EC20B}"
[dshow @ 00000235dde42940]  "XSplitBroadcaster"
[dshow @ 00000235dde42940]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{VHSplitProc}_XSplitBroadcaster_1_staticsource_VIDEO"
[dshow @ 00000235dde42940] DirectShow audio devices
[dshow @ 00000235dde42940]  "디지털 오디오 인터페이스(USB3. 0 capture)"
[dshow @ 00000235dde42940]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{7BAA0C60-92DA-42FE-9649-3295BD38C380}"
[dshow @ 00000235dde42940]  "XSplitBroadcaster"
[dshow @ 00000235dde42940]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{VHSplitProc}_XSplitBroadcaster_1_staticsource_AUDIO"
[dshow @ 00000235dde42940]  "마이크 배열(Realtek(R) Audio)"
[dshow @ 00000235dde42940]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{6D3CA813-2150-4D4F-88B6-A985DF508486}"
dummy: Immediate exit requested
c:\>
c:\>ffmpeg -f dshow -list_options true -i video="USB3. 0 capture"
[dshow @ 000002b6bd472940] DirectShow video device options (from video devices)
[dshow @ 000002b6bd472940]  Pin "캡쳐" (alternative pin name "0")
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1920x1080 fps=10 max s=1920x1080 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1920x1080 fps=10 max s=1920x1080 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1600x1200 fps=10 max s=1600x1200 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1600x1200 fps=10 max s=1600x1200 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1360x768 fps=10 max s=1360x768 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1360x768 fps=10 max s=1360x768 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1280x1024 fps=10 max s=1280x1024 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1280x1024 fps=10 max s=1280x1024 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1280x960 fps=10 max s=1280x960 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1280x960 fps=10 max s=1280x960 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1280x720 fps=10 max s=1280x720 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1280x720 fps=10 max s=1280x720 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1024x768 fps=10 max s=1024x768 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=1024x768 fps=10 max s=1024x768 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=800x600 fps=10 max s=800x600 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=800x600 fps=10 max s=800x600 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=720x576 fps=10 max s=720x576 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=720x576 fps=10 max s=720x576 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=720x480 fps=10 max s=720x480 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=720x480 fps=10 max s=720x480 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=640x480 fps=10 max s=640x480 fps=60.0002
[dshow @ 000002b6bd472940]   vcodec=mjpeg  min s=640x480 fps=10 max s=640x480 fps=60.0002
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1280x720 fps=10 max s=1280x720 fps=10
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1280x720 fps=10 max s=1280x720 fps=10
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1920x1080 fps=5 max s=1920x1080 fps=5
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1920x1080 fps=5 max s=1920x1080 fps=5
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1600x1200 fps=5 max s=1600x1200 fps=5
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1600x1200 fps=5 max s=1600x1200 fps=5
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1360x768 fps=8 max s=1360x768 fps=8
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1360x768 fps=8 max s=1360x768 fps=8
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1280x1024 fps=8 max s=1280x1024 fps=8
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1280x1024 fps=8 max s=1280x1024 fps=8
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1280x960 fps=8 max s=1280x960 fps=8
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1280x960 fps=8 max s=1280x960 fps=8
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1024x768 fps=10 max s=1024x768 fps=10
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=1024x768 fps=10 max s=1024x768 fps=10
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=800x600 fps=5 max s=800x600 fps=20
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=800x600 fps=5 max s=800x600 fps=20
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=720x576 fps=5 max s=720x576 fps=25
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=720x576 fps=5 max s=720x576 fps=25
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=720x480 fps=5 max s=720x480 fps=30
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=720x480 fps=5 max s=720x480 fps=30
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=640x480 fps=5 max s=640x480 fps=30
[dshow @ 000002b6bd472940]   pixel_format=yuyv422  min s=640x480 fps=5 max s=640x480 fps=30
video=USB3. 0 capture: Immediate exit requested
c:\>
c:\>ffmpeg -f dshow -video_size 1920x1080 -framerate 25 -i video="USB3. 0 capture" a.avi
c:\>ffmpeg -f dshow -video_size 1920x1080 -framerate 25 -i video="USB3. 0 capture" -f mpegts udp://239.5.5.5:5555
c:\>ffmpeg -f dshow -video_size 1920x1080 -framerate 25 -i video="USB3. 0 capture" -c:v copy -i "디지털 오디오 인터페이스(USB3. 0 capture)" -c:a copy -f mpegts udp://239.5.5.5:5555
[dshow @ 000001a163806300] Could not run graph (sometimes caused by a device already in use by other application)
audio=디지털 오디오 인터페이스(USB3. 0 capture): I/O error
*) 에러 발생시
   좌하단 윈도우 버튼 ==> 설정 ==> 개인정보 ==> 마이크 ==> "...마이크에 대한 액세스 허용" 아래 "변경"버튼 클릭 "켬"

c:\>ffmpeg -f dshow -video_size 1920x1080 -framerate 25 -i video="USB3. 0 capture":audio="디지털 오디오 인터 페이스(USB3. 0 capture)" -f mpegts udp://239.5.5.5:5555
c:\>ffmpeg -f dshow -video_size 1920x1080 -framerate 30 -i video="USB3. 0 capture":audio="디지털 오디오 인터 페이스(USB3. 0 capture)" -c:v h264 -c:a mp3 -vf format=yuv420p  -f mpegts  udp://239.5.5.5:5555
c:\>ffmpeg -analyzeduration 2147483647 -probesize 2147483647 -f dshow -video_size 1920x1080 -framerate 20 -i video="USB3. 0 capture":audio="디지털 오디오 인터페이스(USB3. 0 capture)" -c:v h264 -c:a mp3  -f mpegts  udp://239.5.5.5:5555


c:\>ffprobe
 Stream #0:0[0x100]: Video: mpeg2video (4:2:2) ([2][0][0][0] / 0x0002), yuv422p(tv, bt470bg/unknown/unknown, progres
 e), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
c:\>ffmpeg
Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1920x1080, 25 fps, 25 tbr, 10000k tbn, 10000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> mpeg2video (native))
  
> ffplay -fflags nobuffer -flags low_delay -framedrop -strict experimental -f dshow -framerate 25 -video_size 1920x1080 -i video="USB3. 0 capture"

  

*) No JPEG Error 
[mjpeg @ 0000020fe885e580] No JPEG data found in image
[mjpeg @ 0000020fe885e580] Found EOI before any SOF, ignoring
[mjpeg @ 0000020fe885e580] No JPEG data found in image
[mjpeg @ 0000020fe885e580] Found EOI before any SOF, ignoring f=0/0

*) ffplay -f dshow -video_size 1920x1080 -framerate 30 -i video="USB3. 0 capture"

-framerate 30 <== 이값 지정이 잘못 되었을때 나타남 60 일때 나옴