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• ffmpeg cannot grab the audio played through the speaker under windows 10

  6 mars 2024, par shangping

  I am using ffmpeg to grab screen. It used to work well under win7 using UScreenCapture and virtual-audio-capturer (all x86 version). On win10, the audio is not recorded. (I cannot hear any sound while playing back). I am using ffmpeg/uscreencapture/virtual-audio-capturer all win32 version since virtual-audio-capturer has no x64 release.

  



  So my question is : How can I record the video and the audio correctly using ffmpeg ?

  



  Here is the screen dump out :
first the direct show devices on my system

  



  C:\ffmpeg-20190403-ee16d14-win32-static\bin>ffmpeg -list_devices true -f dshow -i dummy
ffmpeg version N-93528-gee16d14b0a Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20190212
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --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-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 26.100 / 56. 26.100
  libavcodec     58. 48.101 / 58. 48.101
  libavformat    58. 26.101 / 58. 26.101
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 48.100 /  7. 48.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
[dshow @ 06303ac0] DirectShow video devices (some may be both video and audio devices)
[dshow @ 06303ac0]  "UScreenCapture"
[dshow @ 06303ac0]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\UScreenCapture"
[dshow @ 06303ac0] DirectShow audio devices
[dshow @ 06303ac0]  "Microphone Array (Realtek(R) Audio)"
[dshow @ 06303ac0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{9F102091-1843-44C8-B20E-C6F2E0F11A0F}"
[dshow @ 06303ac0]  "virtual-audio-capturer"
[dshow @ 06303ac0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E14549B-DB61-4309-AFA1-3578E927E935}"
dummy: Immediate exit requested


  



  2nd, when I use virtual audio capturer, ffmpeg just failed :

  



  C:\ffmpeg-20190403-ee16d14-win32-static\bin>ffmpeg -f dshow -i video="UScreenCapture":audio="Microphone Array (Realtek(R) Audio)" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.aviffmpeg -f dshow -i video="UScreenCapture":audio="virtual-audio-capturer" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.avi
ffmpeg version N-93528-gee16d14b0a Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20190212
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --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-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 26.100 / 56. 26.100
  libavcodec     58. 48.101 / 58. 48.101
  libavformat    58. 26.101 / 58. 26.101
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 48.100 /  7. 48.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, dshow, from 'video=UScreenCapture:audio=Microphone Array (Realtek(R) Audio)':
  Duration: N/A, start: 6333.289000, bitrate: N/A
    Stream #0:0: Video: rawvideo, bgr24, 3200x1080, 15 fps, 15 tbr, 10000k tbn, 10000k tbc
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
IMMDeviceEnumerator::GetDefaultAudioEndpoint failed: hr = 0x80070490
[dshow @ 062f4ac0] real-time buffer [UScreenCapture] [video input] too full or near too full (340% of size: 3041280 [rtbufsize parameter])! frame dropped!


  



  When I use the other audio devices, it seems working but there is not audio recorded :

  



  ffmpeg -f dshow -i video="UScreenCapture":audio="Microphone Array (Realtek(R) Audio)" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.avi

    C:\ffmpeg-20190403-ee16d14-win32-static\bin>ffmpeg -f dshow -i video="UScreenCapture":audio="Microphone Array (Realtek(R) Audio)" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.avi
    ffmpeg version N-93528-gee16d14b0a Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 8.2.1 (GCC) 20190212
      configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --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-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
      libavutil      56. 26.100 / 56. 26.100
      libavcodec     58. 48.101 / 58. 48.101
      libavformat    58. 26.101 / 58. 26.101
      libavdevice    58.  7.100 / 58.  7.100
      libavfilter     7. 48.100 /  7. 48.100
      libswscale      5.  4.100 /  5.  4.100
      libswresample   3.  4.100 /  3.  4.100
      libpostproc    55.  4.100 / 55.  4.100
    Guessed Channel Layout for Input Stream #0.1 : stereo
    Input #0, dshow, from 'video=UScreenCapture:audio=Microphone Array (Realtek(R) Audio)':
      Duration: N/A, start: 6168.067000, bitrate: N/A
        Stream #0:0: Video: rawvideo, bgr24, 3200x1080, 15 fps, 15 tbr, 10000k tbn, 10000k tbc
        Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
    Please use -q:a or -q:v, -qscale is ambiguous
    Stream mapping:
      Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
      Stream #0:1 -> #0:1 (pcm_s16le (native) -> mp3 (libmp3lame))
    Press [q] to stop, [?] for help
    -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0.
    Output #0, avi, to 'output.avi':
      Metadata:
        ISFT            : Lavf58.26.101
        Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(progressive), 1075x717, q=2-31, 200 kb/s, 15 fps, 15 tbn, 15 tbc
        Metadata:
          encoder         : Lavc58.48.101 mpeg4
        Side data:
          cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
        Stream #0:1: Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16p, 128 kb/s
        Metadata:
          encoder         : Lavc58.48.101 libmp3lame
    frame=    8 fps=0.0 q=0.0 size=     522kB time=00:00:00.53 bitrate=8013.1kbitsframe=   16 fps= 16 q=0.0 size=    1034kB time=00:00:01.06 bitrate=7938.7kbitsframe=   23 fps= 15 q=0.0 size=    1546kB time=00:00:01.53 bitrate=8258.0kbitsframe=   31 fps= 15 q=0.0 size=    2058kB time=00:00:02.06 bitrate=8156.4kbitsframe=   38 fps= 15 q=0.0 size=    2058kB time=00:00:02.53 bitrate=6653.9kbitsframe=   46 fps= 15 q=0.0 size=    2570kB time=00:00:03.06 bitrate=6864.4kbitsframe=   54 fps= 15 q=0.0 size=    3082kB time=00:00:03.60 bitrate=7012.6kbitsframe=   61 fps= 15 q=0.0 size=    3338kB time=00:00:04.06 bitrate=6723.5kbitsframe=   69 fps= 15 q=0.0 size=    3850kB time=00:00:04.60 bitrate=6855.8kbitsframe=   76 fps= 15 q=0.0 size=    4106kB time=00:00:05.06 bitrate=6638.2kbitsframe=   84 fps= 15 q=0.0 size=    4618kB time=00:00:05.60 bitrate=6755.0kbitsframe=   91 fps= 15 q=0.0 size=    4874kB time=00:00:06.06 bitrate=6581.1kbitsframe=   99 fps= 15 q=0.0 size=    5130kB time=00:00:06.60 bitrate=6367.0kbitsframe=  106 fps= 15 q=0.0 size=    5642kB time=00:00:07.06 bitrate=6540.1kbitsframe=  114 fps= 15 q=0.0 size=    6154kB time=00:00:07.66 bitrate=6575.3kbitsframe=  121 fps= 15 q=0.0 size=    6410kB time=00:00:08.13 bitrate=6455.9kbitsframe=  129 fps= 15 q=0.0 size=    6666kB time=00:00:08.66 bitrate=6300.6kbitsframe=  136 fps= 15 q=0.0 size=    6922kB time=00:00:09.13 bitrate=6208.3kbitsframe=  144 fps= 15 q=0.0 size=    7434kB time=00:00:09.66 bitrate=6299.7kbitsframe=  151 fps= 15 q=0.0 size=    7690kB time=00:00:10.13 bitrate=6216.5kbitsframe=  159 fps= 15 q=0.0 size=    7946kB time=00:00:10.66 bitrate=6102.3kbitsframe=  167 fps= 15 q=0.0 size=    8458kB time=00:00:11.20 bitrate=6186.2kbitsframe=  174 fps= 15 q=0.0 size=    8970kB time=00:00:11.66 bitrate=6298.3kbitsframe=  182 fps= 15 q=0.0 size=    8970kB time=00:00:12.20 bitrate=6022.9kbitsframe=  189 fps= 15 q=0.0 size=    9482kB time=00:00:12.66 bitrate=6132.2kbitsframe=  190 fps= 15 q=0.0 Lsize=    9602kB time=00:00:12.73 bitrate=6177.3kbits/s speed=   1x
    video:9382kB audio:194kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.265721%
    [dshow @ 06393f40] real-time buffer [UScreenCapture] [video input] too full or near too full (340% of size: 3041280 [rtbufsize parameter])! frame dropped!
    Exiting normally, received signal 2.


  


• About Ffmpeg,Console show 'frame=0 fps=0.0 q=0.0 Lsize=0kB time=00:00:00.00' No data pull&push

  9 janvier 2019, par Lus

  I want to use Ffmpeg to pull&push video stream from HLS to RTMP.at first it’s normal,but when I open more,it’s run normally ,but no video data pull&push

  Environment：Windows64+Ngg-§rtmp-static+Ffmpeg-static+Java1.8

  It’s useless,even if I restart rtmp-server.

  ffmpeg -i xxx/live.m3u8 -vcodec h264-s 720*480 -an -f flv -y rtmp://xxx

  The first few video streams is normal,but when I open more streams (5+),
  it run normally,but no data pull.like this.

  2019-01-08 10:58:15.658  INFO ->frame=0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=720 speed=   0x
  
  2019-01-08 10:58:16.598  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:16.984  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik30.ts' for reading
  
  2019-01-08 10:58:17.083  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=744 speed=   0x    
  
  2019-01-08 10:58:18.033  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:18.146  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik31.ts' for reading
  
  2019-01-08 10:58:18.267  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=770 speed=   0x    
  
  2019-01-08 10:58:19.220  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:19.317  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik32.ts' for reading
  
  2019-01-08 10:58:19.415  INFO ->[http @ 0000015efb138600] Opening 'xxx/1/seghik33.ts' for reading
  
  2019-01-08 10:58:19.494  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=795 speed=   0x    
  
  2019-01-08 10:58:20.375  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:20.486  INFO ->[http @ 0000015efb138600] Opening 'xxx/1/seghik34.ts' for reading

• MP4Box does not create final segment

  5 janvier 2019, par Dhruva

  MP4Box is not creating the final segment of video when I dash it. If I run this command on the command line I get only 15 segments out of 16(there is no error) and running it in Google’s Shaka player gives me a 404 at the end of the video saying that the 16th video segment is not found. I am running MP4Box version 0.5.2.

  MP4Box -dash 4000 -rap -frag-rap -sample-groups-traf -profile dashavc264:live -bs-switching multi -url-template video-700k-encrypted.mp4 video-1000k-encrypted.mp4 video-1500k-encrypted.mp4 video-2000k-encrypted.mp4 audio-encrypted.mp4 -out "dash_protected/manifest.mp4"

  .mpd file

  <?xml version="1.0"?>
  
  
  
  <mpd xmlns="urn:mpeg:dash:schema:mpd:2011" minbuffertime="PT1.500S" type="static" mediapresentationduration="PT0H1M0.096S" maxsegmentduration="PT0H0M4.000S" profiles="urn:mpeg:dash:profile:isoff-live:2011,http://dashif.org/guidelines/dash264">
  
   <programinformation moreinformationurl="http://gpac.sourceforge.net">
  
    
  
   </programinformation>
  
  
  
   <period duration="PT0H1M0.096S">
  
    <adaptationset segmentalignment="true" bitstreamswitching="true" maxwidth="1024" maxheight="576" maxframerate="24" par="16:9" lang="eng">
  
     <segmenttemplate initialization="manifest_set1_init.mp4"></segmenttemplate>
  
     <contentprotection schemeiduri="urn:mpeg:dash:mp4protection:2011" value="cenc"></contentprotection>
  
     <representation mimetype="video/mp4" codecs="avc3.64002a" width="852" height="480" framerate="24" sar="1:1" startwithsap="1" bandwidth="1477735">
  
      <segmenttemplate timescale="12288" media="source-video-1500k-encrypted_dash_track1_$Number$.m4s" startnumber="1" duration="49152"></segmenttemplate>
  
     </representation>
  
     <representation mimetype="video/mp4" codecs="avc3.64002a" width="512" height="288" framerate="24" sar="1:1" startwithsap="1" bandwidth="689308">
  
      <segmenttemplate timescale="12288" media="source-video-700k-encrypted_dash_track1_$Number$.m4s" startnumber="1" duration="49152"></segmenttemplate>
  
     </representation>
  
     <representation mimetype="video/mp4" codecs="avc3.64002a" width="1024" height="576" framerate="24" sar="1:1" startwithsap="1" bandwidth="1968345">
  
      <segmenttemplate timescale="12288" media="source-video-2000k-encrypted_dash_track1_$Number$.m4s" startnumber="1" duration="49152"></segmenttemplate>
  
     </representation>
  
     <representation mimetype="video/mp4" codecs="avc3.64002a" width="640" height="360" framerate="24" sar="1:1" startwithsap="1" bandwidth="994771">
  
      <segmenttemplate timescale="12288" media="source-video-1000k-encrypted_dash_track1_$Number$.m4s" startnumber="1" duration="49152"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" lang="eng">
  
     <contentprotection schemeiduri="urn:mpeg:dash:mp4protection:2011" value="cenc"></contentprotection>
  
     <representation mimetype="audio/mp4" codecs="mp4a.40.2" audiosamplingrate="22050" startwithsap="1" bandwidth="69486">
  
      <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
  
      <segmenttemplate timescale="22050" media="source-audio-encrypted_dash$Number$.m4s" startnumber="1" duration="88045" initialization="source-audio-encrypted_dashinit.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
   </period>
  
  </mpd>