Recherche avancée

Sur d’autres sites (9609)

• How to generate HLS stream multiple qualities (Representations) while capturing webcam

  27 janvier 2023, par LUKA TADIĆ

  I want to generate multiple qualities (Representations) for HLS stream while capturing from webcam. I am using ffmpeg_streaming python package. I can generate one quality (Representation) at a time, but when i try to generate more than one, I get this error :

  


  C:\Users\ltadic\Desktop\hls stream>C:/Users/ltadic/AppData/Local/Programs/Python/Python311/python.exe "c:/Users/ltadic/Desktop/hls stream/camera_stream.py"&#xA;ERROR:root:ffmpeg failed to execute command: b"ffmpeg version 2022-12-11-git-c3e20f78b0-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers\r\n  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)\r\n &#xA; 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\r\n  libavutil      57. 43.100 / 57. 43.100\r\n  libavcodec     59. 55.100 / 59. 55.100\r\n  libavformat    59. 34.102 / 59. 34.102\r\n  libavdevice    59.  8.101 / 59.  8.101\r\n  libavfilter     8. 52.100 /  8. 52.100\r\n  libswscale      6.  8.112 /  6.  8.112\r\n  libswresample   4.  9.100 /  4.  9.100\r\n  libpostproc    56.  7.100 / 56.  7.100\r\nInput #0, dshow, from &#x27;video=Fantech Luminous C30&#x27;:\r\n  Duration: N/A, start: 1593.585118, bitrate: N/A\r\n  Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj420p(pc, bt470bg/bt709/unknown), 1920x1080, 25 fps, 25 tbr, 10000k tbn\r\n[dshow @ 0000018b1c4d4280] Could not run graph (sometimes caused by a device already in use by other application)\r\nvideo=Fantech Luminous C30: I/O error\r\n"&#xA;Traceback (most recent call last):&#xA;  File "c:\Users\ltadic\Desktop\hls stream\camera_stream.py", line 13, in <module>&#xA;    hls.output(&#x27;C:\\Users\\ltadic\\Desktop\\camera_stream\\hls1.m3u8&#x27;)&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 93, in output&#xA;    self.run(ffmpeg_bin, monitor, **options)&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 121, in run  &#xA;    asyncio.run(self.async_run(ffmpeg_bin, monitor, **options))&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 190, in run&#xA;    return runner.run(main)&#xA;           ^^^^^^^^^^^^^^^^&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 118, in run&#xA;    return self._loop.run_until_complete(task)&#xA;           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 650, in run_until_complete&#xA;    return future.result()&#xA;           ^^^^^^^^^^^^^^^&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 112, in async_run&#xA;    self._run(ffmpeg_bin, monitor, **options)&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 106, in _run&#xA;    self.pipe, err = process.run()&#xA;</module>

  


  This is the code :

  


  import ffmpeg_streaming
from ffmpeg_streaming import Formats,Bitrate, Representation, Size 

video = ffmpeg_streaming.input('Fantech Luminous C30', capture = True)

_360p  = Representation(Size(640, 360), Bitrate(276 * 1024, 128 * 1024))
_480p  = Representation(Size(854, 480), Bitrate(750 * 1024, 192 * 1024))
_720p  = Representation(Size(1280, 720), Bitrate(2048 * 1024, 320 * 1024))

hls = video.hls(Formats.h264(),hls_list_size=10, hls_time=5)
hls.flags('delete_segments')
hls.representations(_360p, _480p, _720p)
hls.output('C:\\Users\\ltadic\\Desktop\\camera_stream\\hls1.m3u8')


  


  I was expecting to get _360p, _480p and _720p qualities, but my program crashes. If I try same thing for DASH stream, I generate these qualities without any problem.

  


• Python FFmpeg Video Streaming : how to capture multiple representations (resolutions) with webcam

  11 avril 2024, par LUKA TADIĆ

  I am trying to capture webcam stream and make HLS stream. I managed to create HLS stream for one Representation (only one stream resolution) but when I try to create (hls.output) more than one, I get this error :

  


  C:\Users\ltadic\Desktop\hls stream>C:/Users/ltadic/AppData/Local/Programs/Python/Python311/python.exe "c:/Users/ltadic/Desktop/hls stream/camera_stream.py"&#xA;ERROR:root:ffmpeg failed to execute command: b"ffmpeg version 2022-12-11-git-c3e20f78b0-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers\r\n  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)\r\n &#xA; 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\r\n  libavutil      57. 43.100 / 57. 43.100\r\n  libavcodec     59. 55.100 / 59. 55.100\r\n  libavformat    59. 34.102 / 59. 34.102\r\n  libavdevice    59.  8.101 / 59.  8.101\r\n  libavfilter     8. 52.100 /  8. 52.100\r\n  libswscale      6.  8.112 /  6.  8.112\r\n  libswresample   4.  9.100 /  4.  9.100\r\n  libpostproc    56.  7.100 / 56.  7.100\r\nInput #0, dshow, from &#x27;video=Fantech Luminous C30&#x27;:\r\n  Duration: N/A, start: 1593.585118, bitrate: N/A\r\n  Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj420p(pc, bt470bg/bt709/unknown), 1920x1080, 25 fps, 25 tbr, 10000k tbn\r\n[dshow @ 0000018b1c4d4280] Could not run graph (sometimes caused by a device already in use by other application)\r\nvideo=Fantech Luminous C30: I/O error\r\n"&#xA;Traceback (most recent call last):&#xA;  File "c:\Users\ltadic\Desktop\hls stream\camera_stream.py", line 13, in <module>&#xA;    hls.output(&#x27;C:\\Users\\ltadic\\Desktop\\camera_stream\\hls1.m3u8&#x27;)&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 93, in output&#xA;    self.run(ffmpeg_bin, monitor, **options)&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 121, in run  &#xA;    asyncio.run(self.async_run(ffmpeg_bin, monitor, **options))&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 190, in run&#xA;    return runner.run(main)&#xA;           ^^^^^^^^^^^^^^^^&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 118, in run&#xA;    return self._loop.run_until_complete(task)&#xA;           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 650, in run_until_complete&#xA;    return future.result()&#xA;           ^^^^^^^^^^^^^^^&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 112, in async_run&#xA;    self._run(ffmpeg_bin, monitor, **options)&#xA;  File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 106, in _run&#xA;    self.pipe, err = process.run()&#xA;</module>

  


  This is my code :

  


  import ffmpeg_streaming
from ffmpeg_streaming import Formats,Bitrate, Representation, Size 

video = ffmpeg_streaming.input('Fantech Luminous C30', capture = True)

_360p  = Representation(Size(640, 360), Bitrate(276 * 1024, 128 * 1024))
_480p  = Representation(Size(854, 480), Bitrate(750 * 1024, 192 * 1024))
_720p  = Representation(Size(1280, 720), Bitrate(2048 * 1024, 320 * 1024))

hls = video.hls(Formats.h264(),hls_list_size=10, hls_time=5)
hls.flags('delete_segments')
hls.representations(_360p, _480p, _720p)
hls.output('C:\\Users\\ltadic\\Desktop\\camera_stream\\hls1.m3u8')



  


• Using FFMPEG in OpenCV for reading frames from rtsp camera

  19 janvier 2023, par Paloma Jimeno

  I am writing a small script in python3.8 to read frames from a rtsp camera. The code is as follows :

  


  import cv2 
gst_out =  "rtsp://admin:psw@IP:88/videoMain"
cap = cv2.VideoCapture(gst_out, cv2.CAP_FFMPEG)

while(cap.isOpened()):
    ret, frame = cap.read()
    print("New Frame")
    cv2.imshow('frame', frame)
    if cv2.waitKey(20) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()


  


  However, cap is never opened and i do not understand why. I am using opencv 4.5.2 in ubuntu 20.04. This is what i get when i call cv2.getBuildInformation() :

  


   Video I/O:
    DC1394:                      NO
    FFMPEG:                      YES
      avcodec:                   YES (58.54.100)
      avformat:                  YES (58.29.100)
      avutil:                    YES (56.31.100)
      swscale:                   YES (5.5.100)
      avresample:                NO
    GStreamer:                   YES (1.16.2)
    v4l/v4l2:                    YES (linux/videodev2.h)



  


  So as you can see FFMPEG is available. In fact, when i execute ffmpeg in terminal, i get the following :

  


  ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --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-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...



  


  Could you tell me what could be wrong ? I have tested the IP in the browser and everything is working properly.

  


  Thank you