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  • Using ffmpeg on Windows, what is the command to capture hardware encoded H264 stream from Logitech c930e

    2 mai 2015, par Jeff

    I am using ffmpeg on Windows 8 and I would like to capture the built-in H264 hardware encoded stream from the Logitech c930e camera. The H264 built-in encoded stream is part of the UVC 1.5 interface.

    Using this command I have noticed that the c930e exposes two video pins through DirectShow : 0 and 1.

    ffmpeg -report -list_options true -f dshow -i video="Logitech Webcam C930e"

    [dshow @ 0000000002d89360]  Pin "Capture" (alternative pin name "0")

    [dshow @ 0000000002d89360]  Pin "Capture" (alternative pin name "1")

    It doesn’t seem to matter if I choose Pin 0 or 1, I still get raw video from the Logitech c930e webcam. On Linux, the supposed command involves v4l2, but this does not appear to exist in the default Windows version of ffmpeg from http://ffmpeg.zeranoe.com/builds/

    Does the default Windows build of ffmpeg support the direct capture of the UVC interface ?

    This is the closest I have gotten on this journey, but still isn’t quite right :

    ffmpeg -report -f dshow -i video="Logitech Webcam C930e" -s 1920x1080 -r 30 -video_pin_name 1 -vcodec H264 -c copy -f mp4 Logitechc930eFeed.mp4

    As of April 17, 2015 I am still trying to figure this out and have two new pieces of info.

    I found this interesting article on Logitech’s website instructing the user to change the default Logitech driver to the generic USB Video Device driver :
    https://support.logitech.com/en_us/article/Install-native-UVC-drivers-for-your-Logitech-webcam?product=a0qi00000069v0MAAQ#

    I also found that my C930e had an older firmware (8.0.866), and Logitech recommends updating the firmware to 8.0.875 to fix an unspecified UVC H.264 issue.

    So now I have the latest firmware, and am using the generic "USB Video Device" on Windows 8.1.

    ffmpeg -list_devices true -f dshow -i

    which gives this output :

    ffmpeg version N-69608-g9dc45d1 Copyright (c) 2000-2015 the FFmpeg developers
     built with gcc 4.9.2 (GCC)
     configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
     libavutil      54. 18.100 / 54. 18.100
     libavcodec     56. 21.102 / 56. 21.102
     libavformat    56. 19.100 / 56. 19.100
     libavdevice    56.  4.100 / 56.  4.100
     libavfilter     5.  9.103 /  5.  9.103
     libswscale      3.  1.101 /  3.  1.101
     libswresample   1.  1.100 /  1.  1.100
     libpostproc    53.  3.100 / 53.  3.100
    [dshow @ 00000000045c9360] DirectShow video devices (some may be both video and audio devices)
    [dshow @ 00000000045c9360]  "Logitech Webcam C930e"
    [dshow @ 00000000045c9360]     Alternative name "@device_pnp_\\?\usb#vid_046d&pid_0843&mi_00#7&3693c0e6&1&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
    [dshow @ 00000000045c9360] DirectShow audio devices
    [dshow @ 00000000045c9360]  "Microphone (Logitech Webcam C930e)"
    [dshow @ 00000000045c9360]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{BB8BE70B-4DDC-465F-9247-86E6EC98D627}"
    dummy: Immediate exit requested

    And this command :
    ffmpeg -list_options true -f dshow -i video="Logitech Webcam C930e"

    still gives this output :

    ffmpeg version N-69608-g9dc45d1 Copyright (c) 2000-2015 the FFmpeg developers
     built with gcc 4.9.2 (GCC)
     configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
     libavutil      54. 18.100 / 54. 18.100
     libavcodec     56. 21.102 / 56. 21.102
     libavformat    56. 19.100 / 56. 19.100
     libavdevice    56.  4.100 / 56.  4.100
     libavfilter     5.  9.103 /  5.  9.103
     libswscale      3.  1.101 /  3.  1.101
     libswresample   1.  1.100 /  1.  1.100
     libpostproc    53.  3.100 / 53.  3.100
    [dshow @ 0000000004469360] DirectShow video device options (from video devices)
    [dshow @ 0000000004469360]  Pin "Capture" (alternative pin name "0")
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=640x480 fps=5 max s=640x480 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=640x480 fps=5 max s=640x480 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=160x120 fps=5 max s=160x120 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=160x120 fps=5 max s=160x120 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=176x144 fps=5 max s=176x144 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=176x144 fps=5 max s=176x144 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=320x180 fps=5 max s=320x180 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=320x180 fps=5 max s=320x180 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=320x240 fps=5 max s=320x240 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=320x240 fps=5 max s=320x240 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=352x288 fps=5 max s=352x288 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=352x288 fps=5 max s=352x288 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=424x240 fps=5 max s=424x240 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=424x240 fps=5 max s=424x240 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=480x270 fps=5 max s=480x270 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=480x270 fps=5 max s=480x270 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=640x360 fps=5 max s=640x360 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=640x360 fps=5 max s=640x360 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=800x448 fps=5 max s=800x448 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=800x448 fps=5 max s=800x448 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=800x600 fps=5 max s=800x600 fps=24
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=800x600 fps=5 max s=800x600 fps=24
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=848x480 fps=5 max s=848x480 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=848x480 fps=5 max s=848x480 fps=30
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=960x540 fps=5 max s=960x540 fps=15
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=960x540 fps=5 max s=960x540 fps=15
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1024x576 fps=5 max s=1024x576 fps=15
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1024x576 fps=5 max s=1024x576 fps=15
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1280x720 fps=5 max s=1280x720 fps=10
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1280x720 fps=5 max s=1280x720 fps=10
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1600x896 fps=5 max s=1600x896 fps=7.5
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1600x896 fps=5 max s=1600x896 fps=7.5
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1920x1080 fps=5 max s=1920x1080 fps=5
    [dshow @ 0000000004469360]   pixel_format=yuyv422  min s=1920x1080 fps=5 max s=1920x1080 fps=5
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=640x480 fps=5 max s=640x480 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=640x480 fps=5 max s=640x480 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=160x120 fps=5 max s=160x120 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=160x120 fps=5 max s=160x120 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=176x144 fps=5 max s=176x144 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=176x144 fps=5 max s=176x144 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=320x180 fps=5 max s=320x180 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=320x180 fps=5 max s=320x180 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=320x240 fps=5 max s=320x240 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=320x240 fps=5 max s=320x240 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=352x288 fps=5 max s=352x288 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=352x288 fps=5 max s=352x288 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=424x240 fps=5 max s=424x240 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=424x240 fps=5 max s=424x240 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=480x270 fps=5 max s=480x270 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=480x270 fps=5 max s=480x270 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=640x360 fps=5 max s=640x360 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=640x360 fps=5 max s=640x360 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=800x448 fps=5 max s=800x448 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=800x448 fps=5 max s=800x448 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=800x600 fps=5 max s=800x600 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=800x600 fps=5 max s=800x600 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=848x480 fps=5 max s=848x480 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=848x480 fps=5 max s=848x480 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=960x540 fps=5 max s=960x540 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=960x540 fps=5 max s=960x540 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1024x576 fps=5 max s=1024x576 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1024x576 fps=5 max s=1024x576 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1280x720 fps=5 max s=1280x720 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1280x720 fps=5 max s=1280x720 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1600x896 fps=5 max s=1600x896 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1600x896 fps=5 max s=1600x896 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1920x1080 fps=5 max s=1920x1080 fps=30
    [dshow @ 0000000004469360]   vcodec=mjpeg  min s=1920x1080 fps=5 max s=1920x1080 fps=30
    [dshow @ 0000000004469360]  Pin "Capture" (alternative pin name "1")
    video=Logitech Webcam C930e: Immediate exit requested

  • Windows 7 add user path variable for ffmpeg

    17 janvier 2015, par user2601430

    I am trying to add a user path varible for ffmpeg. It is located in D :\AppRun\FFmpeg\bin on my disk. In the Environment Variables dialog I clicked new and I entered ffmpeg for the varible name and D :\AppRun\FFmpeg\bin for the varible value. Clicked OK. Opened cmd prompt. Typed ffmpeg, and it says its not recognized as an internal or external command. What am I doing wrong ??
    I logged off and on but that did not help

  • Revision 99b99831e4 : Align thread data in vp9_ethread On some platforms, such as 32bit Windows and 3

    15 janvier 2015, par Yunqing Wang

    Changed Paths :
     Modify /vp9/encoder/vp9_ethread.c



    Align thread data in vp9_ethread

    On some platforms, such as 32bit Windows and 32bit Mac, the allocated
    memory isn’t aligned automatically. The thread data is aligned to
    ensure the correct access in SIMD code.

    Change-Id : I1108c145fe982ddbd3d9324952758297120e4806

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