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    25 avril 2011, par

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    18 février 2011, par

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    5 mars 2010, par

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Sur d’autres sites (12659)

  • FFMPEG can't find audio device for webcam on one computer

    13 mars 2018, par David

    I am building a webcam recording app. I am using FFMPEG to capture the audio and video. I have a Logitech C930 webcam.

    >ffmpeg -list_devices true -f dshow -i dummy
ffmpeg version N-90155-g28924f4b48 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-cuda —enable-cuvid —enable-d3d11va —enable-nvenc —enable-dxva2 —enable-avisynth
  libavutil      56.  7.101 / 56.  7.101
  libavcodec     58. 12.102 / 58. 12.102
  libavformat    58.  9.100 / 58.  9.100
  libavdevice    58.  2.100 / 58.  2.100
  libavfilter     7. 12.100 /  7. 12.100
  libswscale      5.  0.101 /  5.  0.101
  libswresample   3.  0.101 /  3.  0.101
  libpostproc    55.  0.100 / 55.  0.100
[dshow @ 0000024786c38680] DirectShow video devices (some may be both video and audio devices)
[dshow @ 0000024786c38680]  "Microsoft Camera Front"
[dshow @ 0000024786c38680]     Alternative name "@device_pnp_~?\display#int3470#4&1835d135&0&uid13424#65e8773d-8f56-11d0-a3b9-00a0c9223196bf89b5a5-61f7-4127-a279-e187013d7caf"
[dshow @ 0000024786c38680]  "Microsoft Camera Rear"
[dshow @ 0000024786c38680]     Alternative name "@device_pnp_~?\display#int3470#4&1835d135&0&uid13424#65e8773d-8f56-11d0-a3b9-00a0c92231967c9bbcea-909c-47b3-8cf9-2aa8237e1d4b"
[dshow @ 0000024786c38680]  "Logitech Webcam C930e"
[dshow @ 0000024786c38680]     Alternative name "@device_pnp_~?\usb#vid_046d&pid_0843&mi_00#8&dd2d9e1&0&0000#65e8773d-8f56-11d0-a3b9-00a0c9223196\global"
[dshow @ 0000024786c38680]  "ChromaCam"
[dshow @ 0000024786c38680]     Alternative name "@device_sw_860BB310-5D01-11D0-BD3B-00A0C911CE863403512D-FE5D-4D68-B053-E86D662E4D58"
[dshow @ 0000024786c38680] DirectShow audio devices
[dshow @ 0000024786c38680]  "Microphone (2- Logitech Webcam C930e)"
[dshow @ 0000024786c38680]     Alternative name "@device_cm_33D9A762-90C8-11D0-BD43-00A0C911CE86\wave_1AF7CBFB-477F-44D9-B8C4-E178F036B5D1"
dummy : Immediate exit requested

    Notice the "Microphone (2- Logitech Webcam C930e)" audio device. I can capture from it using FFMPEG.

    Now, I move the same camera to a different computer (Intel Compute Stick) running nearly the same build of windows (16299.251 on the stick, 16299.248 on the laptop). Stick is 32-bit home and laptop is 64-bit Pro (shouldn’t matter, should it ?).
    I run the same command with the exact same camera and same drivers installed :

    >ffmpeg -list_devices true -f dshow -i dummy
ffmpeg version 3.4.2 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-cuda —enable-cuvid —enable-d3d11va —enable-nvenc —enable-dxva2 —enable-avisynth
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[dshow @ 00797be0] DirectShow video devices (some may be both video and audio devices)
[dshow @ 00797be0]  "Logitech Webcam C930e"
[dshow @ 00797be0]     Alternative name "@device_pnp_~?\usb#vid_046d&pid_0843&mi_00#6&dd2d9e1&0&0000#65e8773d-8f56-11d0-a3b9-00a0c9223196\global"
[dshow @ 00797be0] DirectShow audio devices
[dshow @ 00797be0] Could not enumerate audio only devices (or none found).
dummy : Immediate exit requested

    No Audio device listed ? What ? If I use python’s sounddevice module, it sees the audio device :

    > python -m sounddevice
0 Microsoft Sound Mapper - Output, MME (0 in, 2 out)
 1 Remote Audio, MME (0 in, 2 out)
  2 Primary Sound Driver, Windows DirectSound (0 in, 2 out)
  3 Remote Audio, Windows DirectSound (0 in, 2 out)
  4 Remote Audio, Windows WASAPI (0 in, 2 out)
  5 Microphone (Logitech Webcam C930e), Windows WDM-KS (2 in, 0 out)

    I can capture from that audio device with sounddevice, but I can’t get FFMPEG to capture from it.

    >ffmpeg -report -rtbufsize 50000k-f dshow -i video="Logitech Webcam C930e":audio="Microphone (Logitech Webcam C930e)" -t 120 -y -s 1920x1080 -q 2 -video_pin_name 1 -audio_pin_name 5 -filter:v setpts=1*PTS Watchmen_20180312095119_c.avi
ffmpeg started on 2018-03-12 at 17:07:08
Report written to "ffmpeg-20180312-170708.log"
ffmpeg version 3.4.2 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-cuda —enable-cuvid —enable-d3d11va —enable-nvenc —enable-dxva2 —enable-avisynth
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
video=Logitech Webcam C930e:audio=Microphone (Logitech Webcam C930e) : No such file or directory

    I have been trying to debug by removing and reinstalling drivers, etc, but to no avail. I also grabbed a Microsoft Lifecam webcam and got similar results. I can see the lifecam’s audio on the laptop but not the stick in just the same manner as the logitech camera.
    How can I get the audio device to show up on the stick so I can capture from it ?

  • ffmpeg error on AWS lambda

    13 mars 2018, par anarchos78

    I’m trying to convert a jpg image to mp4 and transcode a mp4 file with ffmpeg on AWS lambda.

    For the first task I issue the following :

    ffmpeg -y -f lavfi -i anullsrc -loop 1 -framerate 30 -i test.jpg -t 2 -pix_fmt yuv420p -vf scale=640:480 -c:v libx264 -profile:v baseline -level 3.0 -c:a aac -map 0:a -map 1:v -strict -2 -preset ultrafast /tmp/jpg_output.mp4

    and for the second :

    ffmpeg -i /var/task/test.mp4 -c:v libx264 -c:a copy -strict -2 -v 9 -preset ultrafast -y /tmp/output.mp4

    The funny thing is that the aforementioned tasks (jpg conversion and video transcoding) complete successfully, both locally and on AWS lambda, but I’m getting the below error messages :

    Locally : "err : ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers"

    AWS LAMBDA : "err : ffmpeg version N-89977-gddd851f7cb-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2018 the FFmpeg developers"

    Additionally, on AWS Lambda, the function exits with error, which results in re-execution of the function.

    I searched for solutions to no avail. Any suggestions ?

  • Audacity vocal removal failed when ffmpeg-conversion was involved

    10 mars 2018, par fyang

    I downloaded some songs coded with FLAC, and Audacity could remove the vocals quite well.

    When I downloaded songs coded with ALAC, I must use ffmpeg to convert them to some other forms because Audacity didn’t recognise .m4a files.

    I used the command ffmpeg -i "song 01.m4a" -f flac "song 01.flac". Now Audacity could load the song, but its vocal removal failed to remove the vocals.

    I tried again with this command in order to be precise, ffmpeg -i "song 01.m4a" -af "pan=stereo|c0=c0|c1=c1" -f flac "song 01.flac", and vocal removal did not work either.

    I tried to do it manually by splitting, inverting and changing both channels to mono, but the vocals were still there.

    I think the problem lies with the ffmpeg conversion step. Is there any fix ? Thanks !

    Below is the result of the conversion :

    ffmpeg -i "song 01.m4a" -af "pan=stereo|c0=c0|c1=c1" -f flac "song 01.flac"
    
ffmpeg version N-90143-gb6652f5100 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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
    
  libavutil      56.  7.101 / 56.  7.101
    
  libavcodec     58. 12.102 / 58. 12.102
    
  libavformat    58.  9.100 / 58.  9.100
    
  libavdevice    58.  2.100 / 58.  2.100
    
  libavfilter     7. 12.100 /  7. 12.100
    
  libswscale      5.  0.101 /  5.  0.101
    
  libswresample   3.  0.101 /  3.  0.101
    
  libpostproc    55.  0.100 / 55.  0.100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000019f2b258000] stream 0, timescale not set
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'song 01.m4a':
    
  Metadata:
    
    major_brand     : M4A
    
    minor_version   : 0
    
    compatible_brands: M4A mp42isom
    
    creation_time   : 2009-12-27T00:15:23.000000Z
    
    track           : 1/10
    
    genre           : 
    
    album           : 
    
    artist          : 
    
    comment         : ExactAudioCopy v0.95b4
    
    DISCID          : 
    
    iTunNORM        :  00000F32 00000E1D 0000547D 00005B93 0006C3CA 0006C43E 00007FF8 00007FFF 00058227 0003593B
    
    title           : song 01
    
    encoder         : iTunes 9.0.2.25
    
    date            : 2005
    
    album_artist    : 
    
    lyrics          : 
    
  Duration: 00:08:10.84, start: 0.000000, bitrate: 921 kb/s
    
    Stream #0:0(und): Audio: alac (alac / 0x63616C61), 44100 Hz, stereo, s16p, 920 kb/s (default)
    
    Metadata:
    
      creation_time   : 2009-12-27T00:15:23.000000Z
    
    Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 300x300 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (alac (native) -> flac (native))
    
Press [q] to stop, [?] for help
    
[Parsed_pan_0 @ 0000019f2b2a6fc0] Pure channel mapping detected: 0 1
    
Output #0, flac, to 'song 01.flac':
    
  Metadata:
    
    major_brand     : M4A
    
    minor_version   : 0
    
    compatible_brands: M4A mp42isom
    
    lyrics          : 
    
    TRACKNUMBER     : 1/10
    
    genre           : 
    
    album           : 
    
    artist          : 
    
    DESCRIPTION     : ExactAudioCopy v0.95b4
    
    DISCID          : 
    
    iTunNORM        :  00000F32 00000E1D 0000547D 00005B93 0006C3CA 0006C43E 00007FF8 00007FFF 00058227 0003593B
    
    title           : song 01
    
    ALBUMARTIST     : 
    
    date            : 2005
    
    encoder         : Lavf58.9.100
    
    Stream #0:0(und): Audio: flac, 44100 Hz, stereo, s16, 128 kb/s (default)
    
    Metadata:
    
      creation_time   : 2009-12-27T00:15:23.000000Z
    
      encoder         : Lavc58.12.102 flac
    
size=   54518kB time=00:08:10.84 bitrate= 909.9kbits/s speed=  35x
    
video:0kB audio:54508kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.018294%

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