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The pirate bay depuis la Belgique
1er avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
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Sur d’autres sites (6142)
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How to generate HLS stream multiple qualities (Representations) while capturing webcam
27 janvier 2023, par LUKA TADIĆI 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"
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 
 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 'video=Fantech Luminous C30':\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"
Traceback (most recent call last):
 File "c:\Users\ltadic\Desktop\hls stream\camera_stream.py", line 13, in <module>
 hls.output('C:\\Users\\ltadic\\Desktop\\camera_stream\\hls1.m3u8')
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 93, in output
 self.run(ffmpeg_bin, monitor, **options)
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 121, in run 
 asyncio.run(self.async_run(ffmpeg_bin, monitor, **options))
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 190, in run
 return runner.run(main)
 ^^^^^^^^^^^^^^^^
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 118, in run
 return self._loop.run_until_complete(task)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 650, in run_until_complete
 return future.result()
 ^^^^^^^^^^^^^^^
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 112, in async_run
 self._run(ffmpeg_bin, monitor, **options)
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 106, in _run
 self.pipe, err = process.run()
</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.


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Python FFmpeg Video Streaming : how to capture multiple representations (resolutions) with webcam
11 avril 2024, par LUKA TADIĆI 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"
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 
 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 'video=Fantech Luminous C30':\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"
Traceback (most recent call last):
 File "c:\Users\ltadic\Desktop\hls stream\camera_stream.py", line 13, in <module>
 hls.output('C:\\Users\\ltadic\\Desktop\\camera_stream\\hls1.m3u8')
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 93, in output
 self.run(ffmpeg_bin, monitor, **options)
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 121, in run 
 asyncio.run(self.async_run(ffmpeg_bin, monitor, **options))
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 190, in run
 return runner.run(main)
 ^^^^^^^^^^^^^^^^
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 118, in run
 return self._loop.run_until_complete(task)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 650, in run_until_complete
 return future.result()
 ^^^^^^^^^^^^^^^
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 112, in async_run
 self._run(ffmpeg_bin, monitor, **options)
 File "C:\Users\ltadic\AppData\Local\Programs\Python\Python311\Lib\site-packages\ffmpeg_streaming\_media.py", line 106, in _run
 self.pipe, err = process.run()
</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')



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Using FFMPEG in OpenCV for reading frames from rtsp camera
19 janvier 2023, par Paloma JimenoI 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
ffmpegin 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


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