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• videotoolbox transcoding from mjpeg to h264 slower that libx264

  16 juin 2021, par SolskGaer

  here are the command that I used to do the transcoding, however the videotoolbox one is slower than libx264, why is that happening ? Is there any mistake in my videotoolbox command ?

  


  ffmpeg -loglevel quiet -f mjpeg -r 20 -i pipe:0 -vf scale=500:-2 -vcodec libx264 -tune zerolatency -profile:v baseline -preset medium -r 20 -f h264 -

  


  ffmpeg -loglevel quiet -f mjpeg -r 20 -i pipe:0 -vf scale=500:-2 -vcodec h264_videotoolbox -profile:v baseline -realtime true -r 20 -f h264 -

  


  and although libx264 is a little bit faster, it is still not in realtime and there is notable latency, how can I do the transcoding in real time ? And I prefer h264_videotoolbox since it is CPU friendly

  


  the following is the stderr of ffmpeg

  


  for videotoolbox

  


  ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  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
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, mjpeg, from 'pipe:0':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 750x1334 [SAR 72:72 DAR 375:667], 20 tbr, 1200k tbn, 20 tbc
Please use -profile:a or -profile:v, -profile is ambiguous
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (h264_videotoolbox))
[swscaler @ 0x7fddd15f3000] deprecated pixel format used, make sure you did set range correctly
[h264_videotoolbox @ 0x7fddd200b600] Cannot use B-frames with baseline profile. Output will not contain B-frames.
[h264_videotoolbox @ 0x7fddd200b600] CABAC entropy requires 'main' or 'high' profile, but baseline was requested. Encode will not use CABAC entropy.
Output #0, h264, to 'pipe:':
  Metadata:
    encoder         : Lavf58.76.100
  Stream #0:0: Video: h264, yuv420p(tv, bt470bg/unknown/unknown, progressive), 400x712 [SAR 1335:1334 DAR 375:667], q=2-31, 3000 kb/s, 20 fps, 20 tbn
    Metadata:
      encoder         : Lavc58.134.100 h264_videotoolbox
frame=    1 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
frame=    7 fps=0.0 q=-0.0 size=     148kB time=00:00:00.20 bitrate=6057.2kbits/s speed=0.369x    
frame=   12 fps= 11 q=-0.0 size=     236kB time=00:00:00.45 bitrate=4305.3kbits/s speed=0.426x    
frame=   17 fps= 11 q=-0.0 size=     363kB time=00:00:00.70 bitrate=4243.6kbits/s speed=0.442x    
frame=   22 fps= 10 q=-0.0 size=     438kB time=00:00:00.95 bitrate=3778.8kbits/s speed=0.451x    
frame=   27 fps= 10 q=-0.0 size=     558kB time=00:00:01.20 bitrate=3809.1kbits/s speed=0.454x    
frame=   32 fps= 10 q=-0.0 size=     615kB time=00:00:01.45 bitrate=3476.4kbits/s speed=0.458x    
frame=   37 fps= 10 q=-0.0 size=     685kB time=00:00:01.70 bitrate=3300.9kbits/s speed=0.46x    
frame=   42 fps= 10 q=-0.0 size=     796kB time=00:00:01.95 bitrate=3343.7kbits/s speed=0.462x    
frame=   47 fps=9.9 q=-0.0 size=     878kB time=00:00:02.20 bitrate=3268.8kbits/s speed=0.464x    
frame=   52 fps=9.9 q=-0.0 size=    1002kB time=00:00:02.45 bitrate=3351.7kbits/s speed=0.465x    
frame=   57 fps=9.9 q=-0.0 size=    1076kB time=00:00:02.70 bitrate=3263.1kbits/s speed=0.467x    
frame=   62 fps=9.8 q=-0.0 size=    1168kB time=00:00:02.95 bitrate=3242.7kbits/s speed=0.468x    
frame=   67 fps=9.8 q=-0.0 size=    1281kB time=00:00:03.20 bitrate=3279.4kbits/s speed=0.468x    
frame=   72 fps=9.8 q=-0.0 size=    1366kB time=00:00:03.45 bitrate=3243.8kbits/s speed=0.469x    
frame=   77 fps=9.8 q=-0.0 size=    1488kB time=00:00:03.70 bitrate=3294.9kbits/s speed=0.47x    
frame=   82 fps=9.8 q=-0.0 size=    1560kB time=00:00:03.95 bitrate=3235.9kbits/s speed=0.47x    
frame=   87 fps=9.8 q=-0.0 size=    1686kB time=00:00:04.20 bitrate=3288.8kbits/s speed=0.471x    
frame=   92 fps=9.7 q=-0.0 size=    1750kB time=00:00:04.45 bitrate=3221.4kbits/s speed=0.471x    
frame=   97 fps=9.7 q=-0.0 size=    1825kB time=00:00:04.70 bitrate=3180.2kbits/s speed=0.472x    


  


  for libx264

  


  ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  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
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, mjpeg, from 'pipe:0':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 750x1334 [SAR 72:72 DAR 375:667], 20 tbr, 1200k tbn, 20 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
[swscaler @ 0x7fd1864fd000] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0x7fd187009400] using SAR=1335/1334
[libx264 @ 0x7fd187009400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fd187009400] profile Constrained Baseline, level 3.0, 4:2:0, 8-bit
Output #0, h264, to 'pipe:':
  Metadata:
    encoder         : Lavf58.76.100
  Stream #0:0: Video: h264, yuvj420p(pc, bt470bg/unknown/unknown, progressive), 400x712 [SAR 1335:1334 DAR 375:667], q=2-31, 20 fps, 20 tbn
    Metadata:
      encoder         : Lavc58.134.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=    1 fps=0.0 q=20.0 size=      62kB time=00:00:00.05 bitrate=10091.5kbits/s speed=2.5e+04x    
frame=    7 fps=0.0 q=29.0 size=     168kB time=00:00:00.35 bitrate=3941.8kbits/s speed=0.644x    
frame=   12 fps= 11 q=29.0 size=     244kB time=00:00:00.60 bitrate=3329.8kbits/s speed=0.562x    
frame=   17 fps= 11 q=29.0 size=     303kB time=00:00:00.85 bitrate=2923.6kbits/s speed=0.535x    
frame=   22 fps= 10 q=29.0 size=     359kB time=00:00:01.10 bitrate=2677.2kbits/s speed=0.52x    
frame=   27 fps= 10 q=29.0 size=     433kB time=00:00:01.35 bitrate=2625.4kbits/s speed=0.511x    
frame=   32 fps= 10 q=29.0 size=     498kB time=00:00:01.60 bitrate=2552.0kbits/s speed=0.506x    
frame=   37 fps= 10 q=29.0 size=     570kB time=00:00:01.85 bitrate=2525.9kbits/s speed=0.502x    
frame=   42 fps= 10 q=29.0 size=     647kB time=00:00:02.10 bitrate=2522.2kbits/s speed=0.498x    
frame=   47 fps=9.9 q=29.0 size=     702kB time=00:00:02.35 bitrate=2447.2kbits/s speed=0.497x    
frame=   52 fps=9.9 q=28.0 size=     756kB time=00:00:02.60 bitrate=2381.6kbits/s speed=0.495x    
frame=   57 fps=9.9 q=29.0 size=     818kB time=00:00:02.85 bitrate=2350.2kbits/s speed=0.494x    
frame=   62 fps=9.8 q=28.0 size=     872kB time=00:00:03.10 bitrate=2304.9kbits/s speed=0.491x    
frame=   67 fps=9.8 q=29.0 size=     930kB time=00:00:03.35 bitrate=2275.0kbits/s speed=0.491x    
frame=   72 fps=9.8 q=29.0 size=     990kB time=00:00:03.60 bitrate=2253.4kbits/s speed=0.489x    
frame=   77 fps=9.8 q=28.0 size=    1051kB time=00:00:03.85 bitrate=2235.9kbits/s speed=0.488x    
frame=   82 fps=9.8 q=28.0 size=    1103kB time=00:00:04.10 bitrate=2204.4kbits/s speed=0.488x    
frame=   87 fps=9.7 q=28.0 size=    1153kB time=00:00:04.35 bitrate=2171.6kbits/s speed=0.487x    
frame=   92 fps=9.7 q=29.0 size=    1209kB time=00:00:04.60 bitrate=2153.8kbits/s speed=0.486x    
frame=   97 fps=9.7 q=29.0 size=    1279kB time=00:00:04.85 bitrate=2160.2kbits/s speed=0.485x    
frame=  102 fps=9.7 q=29.0 size=    1351kB time=00:00:05.10 bitrate=2170.8kbits/s speed=0.485x 


  


• Laggy video and longer duration than the original file

  11 janvier 2021, par jagvetinte

  I'm trying to convert a file with this output in ffmpeg :

  


  ffmpeg version 4.3.1-2021-01-01-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
    Last message repeated 5 times
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
    Last message repeated 1 times
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
    Last message repeated 1 times
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
    Last message repeated 1 times
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
    Last message repeated 1 times
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
    Last message repeated 1 times
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
    Last message repeated 1 times
[mpeg2video @ 000002e8de943080] Invalid frame dimensions 0x0.
[s302m @ 000002e8de960780] S302 non PCM mode with data type 28 not supported
    Last message repeated 4 times
[mpegts @ 000002e8de93cbc0] decoding for stream 3 failed
[mpegts @ 000002e8de93cbc0] Could not find codec parameters for stream 3 (Audio: s302m (BSSD / 0x44535342), stereo, s32 (20 bit), 2304 kb/s): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from 'G:\test\test.ts':
  Duration: 03:27:29.61, start: 3.000000, bitrate: 39124 kb/s
  Program 1
    Stream #0:0[0x200]: Video: mpeg2video (4:2:2) ([2][0][0][0] / 0x0002), yuv422p(tv, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 450 tbr, 90k tbn, 50 tbc
    Side data:
      cpb: bitrate max/min/avg: 36898800/0/0 buffer size: 13271040 vbv_delay: N/A
    Stream #0:1[0x1010]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s
    Stream #0:2[0x1020]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s
    Stream #0:3[0x1030]: Audio: s302m (BSSD / 0x44535342), stereo, s32 (20 bit), 2304 kb/s


  


  But whatever setting i try the video ends up very laggy and the duration ends up much longer than the original file, even when I play it through VLC. It is a little hard to explain so I will provide a sample file here with the result after the conversion :

  


  https://drive.google.com/file/d/1ADPF2POSnBCiJkgMES2vOn2wznyBst6W/view?usp=sharing

  


  Is it something wrong with the file or with ffmpeg itself and how do I solve it ?

  


  Firstly I tried this command :

  


  ffmpeg -i "G:\test\test.ts" -map 0:0 -map 0:1 -vcodec libx265 -crf 23 -filter:v yadif=1 -acodec ac3 -ab 384k "C:\Users\User name\Videos\test.mkv"


  


  And then I tried this with the same result :

  


  ffmpeg -i "G:\test\test.ts" -map 0:0 -map 0:1 -vcodec copy -acodec copy "C:\Users\User name\Videos\test.mkv"


  


  The sample file is converted with the first command.

  


• ffmpeg stream Windows 7 desktop to Youtube give invalid argument

  11 juin 2021, par TenG

  I am experimenting with live streaming my Windows 7 desktop to YouTube.

  


  Firstly the list of devices :

  


  ffmpeg-N-100616-gca21cb1e36-win64-gpl\bin\ffmpeg.exe -list_devices true -f dshow -i dummy

  


  Gives :

  


  ffmpeg version N-100616-gca21cb1e36 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 9.3-win32 (GCC) 20200320
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --a
rch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv
--enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-open
cl --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-li
bdavs2 --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-li
bopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --en
able-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-li
bxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 63.100 / 56. 63.100
  libavcodec     58.116.100 / 58.116.100
  libavformat    58. 65.101 / 58. 65.101
  libavdevice    58. 11.103 / 58. 11.103
  libavfilter     7. 95.100 /  7. 95.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
[dshow @ 000000000052ca00] DirectShow video devices (some may be both video and audio devices)
[dshow @ 000000000052ca00]  "VF0700 Live! Cam Chat HD"
[dshow @ 000000000052ca00]     Alternative name "@device_pnp_\\?\usb#vid_041e&pid_4088&mi_00#7&b015b04&0&0000#{65e8773d-8f56-11d0-a3
b9-00a0c9223196}\global"
[dshow @ 000000000052ca00]  "UScreenCapture"
[dshow @ 000000000052ca00]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\UScreenCapture"
[dshow @ 000000000052ca00]  "screen-capture-recorder"
[dshow @ 000000000052ca00]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{4EA69364-2C8A-4AE6-A561-56E4B504
4439}"
[dshow @ 000000000052ca00] DirectShow audio devices
[dshow @ 000000000052ca00]  "Microphone (VF0700 Live! Cam Ch"
[dshow @ 000000000052ca00]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (VF0700 Live! Cam Ch"
[dshow @ 000000000052ca00]  "virtual-audio-capturer"
[dshow @ 000000000052ca00]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E146464-DB61-4309-AFA1-3578E927
E935}"
dummy: Immediate exit requested


  


  ffmpeg-N-100616-gca21cb1e36-win64-gpl\bin\ffmpeg.exe -list_devices true -f dshow -i dummy

  


  gives :

  


  ffmpeg version 4.3.1-2021-01-01-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enab
le-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libss
h --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-li
brav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --en
able-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-
amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libm
fx --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-
libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable
-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
[dshow @ 0000000000485ac0] DirectShow video devices (some may be both video and audio devices)
[dshow @ 0000000000485ac0]  "VF0700 Live! Cam Chat HD"
[dshow @ 0000000000485ac0]     Alternative name "@device_pnp_\\?\usb#vid_041e&pid_4088&mi_00#7&b015b04&0&0000#{65e8773d-8f56-11d0-a3
b9-00a0c9223196}\global"
[dshow @ 0000000000485ac0]  "UScreenCapture"
[dshow @ 0000000000485ac0]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\UScreenCapture"
[dshow @ 0000000000485ac0]  "screen-capture-recorder"
[dshow @ 0000000000485ac0]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{4EA69364-2C8A-4AE6-A561-56E4B504
4439}"
[dshow @ 0000000000485ac0] DirectShow audio devices
[dshow @ 0000000000485ac0]  "Microphone (VF0700 Live! Cam Ch"
[dshow @ 0000000000485ac0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (VF0700 Live! Cam Ch"
[dshow @ 0000000000485ac0]  "virtual-audio-capturer"
[dshow @ 0000000000485ac0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E146464-DB61-4309-AFA1-3578E927
E935}"
dummy: Immediate exit requested


  


  Now trying to live stream with the command :

  


  ffmpeg-N-100616-gca21cb1e36-win64-gpl\bin\ffmpeg.exe -f dshow -i video='screen-capture-recorder':audio='Microphone (VF0700 Live! Cam Ch' -r 24 -s 1920x1080 -qmin 3 'rtmp://a.rtmp.youtube.com:1935/live2/the-stream-key'

  


  I get :

  


  ffmpeg version 4.3.1-2021-01-01-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enab
le-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libss
h --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-li
brav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --en
able-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-
amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libm
fx --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-
libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable
-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
leaving aero onGuessed Channel Layout for Input Stream #0.1 : stereo
Input #0, dshow, from 'video=screen-capture-recorder:audio=Microphone (VF0700 Live! Cam Ch':
  Duration: N/A, start: 758394.360000, bitrate: N/A
    Stream #0:0: Video: rawvideo, bgr0, 1920x1080, 30 fps, 30 tbr, 10000k tbn, 10000k tbc
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
[NULL @ 00000000006645c0] Unable to find a suitable output format for 'rtmp://a.rtmp.youtube.com:1935/live2/the-stream-key
'
rtmp://a.rtmp.youtube.com:1935/live2/the-stream-key: Invalid argument
[dshow @ 0000000000607400] real-time buffer [screen-capture-recorder] [video input] too full or near too full (545% of size: 3041280
 [rtbufsize parameter])! frame dropped!
    Last message repeated 5 times



  


  In short the errors are :

  


  [NULL @ 00000000006645c0] Unable to find a suitable output format for 'rtmp://a.rtmp.youtube.com:1935/live2/the-stream-key
'
rtmp://a.rtmp.youtube.com:1935/live2/the-stream-key: Invalid argument
[dshow @ 0000000000607400] real-time buffer [screen-capture-recorder] [video input] too full or near too full (545% of size: 3041280


  


  I have tried with and without the :1935 port number, with ffmpeg_x64.exe but no difference. Is the stream key the invalid argument or something else ?