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Sur d’autres sites (11125)

  • ffmpeg - store desired output to python variable

    15 janvier 2024, par Chris P

    If i run : ffmpeg -list_devices true -f dshow -i dummy i get :

    


    ffmpeg version 2023-01-30-git-2d202985b7-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (Rev10, 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-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --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      57. 44.100 / 57. 44.100
  libavcodec     59. 59.100 / 59. 59.100
  libavformat    59. 36.100 / 59. 36.100
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 56.100 /  8. 56.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100
[dshow @ 00000236357d0480] "HP True Vision HD Camera" (video)
[dshow @ 00000236357d0480]   Alternative name "@device_pnp_\\?\usb#vid_04f2&pid_b6ab&mi_00#6&763f234&2&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 00000236357d0480] "Microphone Array (Intel® Smart Sound Technology for Digital Microphones)" (audio)
[dshow @ 00000236357d0480]   Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{E8824DE9-F848-47F1-BB2A-EB24E11050FC}"
dummy: Immediate exit requested


    


    From this output i want to store : "HP True Vision HD Camera" (first video output) in a python variable.

    


    Is this possible ?

    


    I am trying

    


    import subprocess
ffmpeg_command = ["ffmpeg", "-list_devices", "true","-f", "dshow", "-i", "dummy"]
pipe = subprocess.run(ffmpeg_command,stdout=subprocess.PIPE,stderr=subprocess.PIPE,bufsize=10**8)
output = pipe.stdout
lines = output.splitlines()
for line in lines:
    if line.startswith("[dshow @"):
        if "(video)" in line:
            camera_info = line.split("\"")[1]
            print(camera_info)


    


  • ffmpeg - cut without reencoding and strange behaviour : application provided duration is out of range for mov/mp4 format [closed]

    27 août 2023, par user2707175

    In Ubuntu 18.04 I quite often used the following command for trimming part of the video without re encoding (which means without any quality loss).

    


    ffmpeg -ss 00:06:00 -i DSCF5984.MOV -t 00:07:00 -c copy DSCF5984_A_wszystkie.MOV

    


    Not so much time ago I moved to Ubuntu 22.04. Still having the same video camera and still using the same format for recording, when using the command as above I'm getting quite strange error and the behavior is unexpected. In this case mov file is 40 sec file. I want to get 7 seconds fragment starting from 6 second (thus from 6 to 13 sec). Instead of this I get very short fragment from the beginning of the file. I don't even know how long as none of video players want to display its length. Probably it's 1-2 sec. Thus it's not only, I get this error, but ffmpeg doesn't work. In theory I have the newest version available for ubuntu 22.04.

    


    Messages displayed by ffmpeg

    


    ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  WARNING: library configuration mismatch
  avcodec     configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libaribb24 --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc --enable-libsmbclient
  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
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'DSCF5984.MOV':
  Metadata:
    major_brand     : qt  
    minor_version   : 0
    compatible_brands: qt  
    creation_time   : 2023-08-12T23:07:18.000000Z
    original_format : Digital Camera
    original_format-eng: Digital Camera
    comment         : FUJIFILM DIGITAL CAMERA X-S10
    comment-eng     : FUJIFILM DIGITAL CAMERA X-S10
  Duration: 00:00:40.04, start: 0.000000, bitrate: 105270 kb/s
  Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, smpte170m/bt709/smpte170m), 3840x2160, 101873 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
    Metadata:
      creation_time   : 2023-08-12T23:07:18.000000Z
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
      timecode        : 07:05:54;21
  Stream #0:1(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
    Metadata:
      creation_time   : 2023-08-12T23:07:18.000000Z
      vendor_id       : [0][0][0][0]
      timecode        : 07:05:54;21
  Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2023-08-12T23:07:18.000000Z
      timecode        : 07:05:54;21
[mov @ 0x55a005fa6e40] Application provided duration: -9223372036854775808 / timestamp: -9223372036854775808 is out of range for mov/mp4 format
[mov @ 0x55a005fa6e40] pts has no value
Output #0, mov, to 'DSCF5984_A_wszystkie.MOV':
  Metadata:
    major_brand     : qt  
    minor_version   : 0
    compatible_brands: qt  
    comment-eng     : FUJIFILM DIGITAL CAMERA X-S10
    original_format : Digital Camera
    original_format-eng: Digital Camera
    comment         : FUJIFILM DIGITAL CAMERA X-S10
    encoder         : Lavf58.76.100
  Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, smpte170m/bt709/smpte170m), 3840x2160, q=2-31, 101873 kb/s, 0.03 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
    Metadata:
      creation_time   : 2023-08-12T23:07:18.000000Z
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
      timecode        : 07:05:54;21
  Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
    Metadata:
      creation_time   : 2023-08-12T23:07:18.000000Z
      vendor_id       : [0][0][0][0]
      timecode        : 07:05:54;21
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=   30 fps=0.0 q=-1.0 Lsize=   13475kB time=-00:05:19.97 bitrate=N/A speed=N/A    
video:13191kB audio:282kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.019629%


    


    Is that some kind of error ? Or should I do sth different ? I'm quite surprised as I didn't change my camera. So is that sth changed in ffmpeg ?

    


  • FFMPEG G711ulaw Rhythmic Distortion [closed]

    8 juillet 2024, par nsd123

    I am using ffmpeg take audio in from my microphone, rtp stream it to a multicast address as g711ulaw audio, and then play that audio through various devices.

    


    In my network I have other workstations, as well as a digital telephone type device.
My workstations are using Windows.

    


    I am taking the microphone input with this ffmpeg command :
ffmpeg -f dshow -i audio="" -pcm_mulaw -ab 64k -ac 1 -ar 8000 -f rtp rtp :// : ?localaddr=

    


    This command transmits the microphone data successfully to other workstations on the network, where I can use ffplay or other means to listen to the rtp stream and hear clear audio.

    


    On the telephone device, when it gets converted to analog to play, it's picking up this strange, rhythmic burp/clicking/noise, like every time its getting information, its interpreting the header as voice data or something.

    


    The output of the ffmpeg command says the pcm_s16le codec is the native one, and seems to convert it just fine.

    


    Is there any kind of option I should be using in my ffmpeg command that sounds like it could resolve this issue ? Or does this kind of interference typically occur for a specific reason ?

    


    Its not the hardware, I've tested that (other audio able to play clearly).
I've tried a few other codecs to no success.
I've tried a few ffmpeg options, but there are so many options, they've just been successful stabs in the dark