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Valkaama DVD Label
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Mis à jour : Février 2013
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Sur d’autres sites (7566)
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OpenCV on MacOS : Match Camera Index and Name
15 janvier, par rpi_guruI have a builtin camera and a USB webcam connected to my MacOS.


Here is a result of
system_profiler SPCameraDataType -xmlcommand :

<?xml version="1.0" encoding="UTF-8"?>

<plist version="1.0">
<array>
 <dict>
 <key>_SPCommandLineArguments</key>
 <array>
 <string>/usr/sbin/system_profiler</string>
 <string>-nospawn</string>
 <string>-xml</string>
 <string>SPCameraDataType</string>
 <string>-detailLevel</string>
 <string>full</string>
 </array>
 <key>_SPCompletionInterval</key>
 <real>1.1997909545898438</real>
 <key>_SPResponseTime</key>
 <real>1.2810090780258179</real>
 <key>_dataType</key>
 <string>SPCameraDataType</string>
 <key>_detailLevel</key>
 <integer>-1</integer>
 <key>_items</key>
 <array>
 <dict>
 <key>_name</key>
 <string>USB Camera</string>
 <key>spcamera_model-id</key>
 <string>UVC Camera VendorID_3141 ProductID_25453</string>
 <key>spcamera_unique-id</key>
 <string>0x11000000c45636d</string>
 </dict>
 <dict>
 <key>_name</key>
 <string>FaceTime HD Camera</string>
 <key>spcamera_model-id</key>
 <string>FaceTime HD Camera</string>
 <key>spcamera_unique-id</key>
 <string>EAB7A68F-EC2B-4487-AADF-D8A91C1CB782</string>
 </dict>
 </array>
 <key>_parentDataType</key>
 <string>SPHardwareDataType</string>
 <key>_properties</key>
 <dict>
 <key>_name</key>
 <dict>
 <key>_isColumn</key>
 <string>NO</string>
 <key>_isOutlineColumn</key>
 <string>NO</string>
 <key>_order</key>
 <string>0</string>
 </dict>
 <key>spcamera</key>
 <dict>
 <key>_order</key>
 <string>10</string>
 </dict>
 <key>spcamera_model-id</key>
 <dict>
 <key>_order</key>
 <string>30</string>
 </dict>
 <key>spcamera_unique-id</key>
 <dict>
 <key>_order</key>
 <string>40</string>
 </dict>
 <key>volumes</key>
 <dict>
 <key>_detailLevel</key>
 <string>0</string>
 </dict>
 </dict>
 <key>_timeStamp</key>
 <date>2024-11-29T21:57:28Z</date>
 <key>_versionInfo</key>
 <dict>
 <key>com.apple.SystemProfiler.SPCameraReporter</key>
 <string>1.2.0</string>
 </dict>
 </dict>
</array>
</plist>


As you can see, I have a couple of video input devices :
USB Camera&FaceTime HD Camera

The problem is that when I use
cap = cv2.VideoCapture(0), it uses theFaceTime HD Camera.

Can we match the camera index in OpenCV with the camera names ?


P.S. I tried
ffmpeg, but it returned similar result :



ioreg | grep -i camresult :



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FFMPEG convert videos using Automator [closed]
8 janvier, par FilipProI'm trying to use Apple Automator (v2.10, Sonoma 14.7.1, Apple M1) to select a folder and convert all MP4 files to WMV files using FFMPEG. The user is supposed to export files from Final Cut Pro in MP4, put them in a folder of their choice and then start the automation by having to select the folder where MP4 files are saved.


FFMPEG is installed via Homebrew and the installation folder was found via "which ffmpeg" ( /opt/homebrew/bin/ffmpeg ).


This is the worklow I currently have : Full Automator Workflow


- 

-
Run AppleScript


- 

- 

on run {input, parameters}

 tell application "System Events"
 activate
 return text returned of (display dialog "Enter administrator password" default answer "" with hidden answer)
 end tell

 return input
end run






- 

-
Run Shell script (/bin/zsh, no input required)


- 

- 

sudo -S id -u






- 

-
Ask for Finder elements


- 

- Select folder, starting from "Downloads" folder, no multiple selection




-
Run Shell script (/bin/zsh, input as arguments)


- 

- 

cd "$1"

for f in *.mp4; do
 osascript -e "display notification \"Converting file: $f \" with title \"Video Conversion\""
 sudo /opt/homebrew/bin/ffmpeg -i "$f" -c:v wmv2 -b:v 3000k -c:a wmav2 -b:c 192k "${f%.*}.wmv"
 if [ $? -eq 0 ]; then
 osascript -e "display notification \"Converted file: $f \" with title \"Video Conversion\""
 else
 osascript -e "display notification \"Error converting file: $f \" with title \"Video Conversion\""
 fi
done






- 











The actual script (step 4) works perfectly if handtyped in Terminal but FFMPEG return "Error opening output files : Invalid argument" when run within the Automator workflow.


This is the output of step 4 (I added *REDACTED FOR PRIVACY* instead of actual filenames) :


ffmpeg version 7.1 Copyright (c) 2000-2024 the FFmpeg developers
built with Apple clang version 16.0.0 (clang-1600.0.26.4)
configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/7.1_3 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
libavutil 59. 39.100 / 59. 39.100
libavcodec 61. 19.100 / 61. 19.100
libavformat 61. 7.100 / 61. 7.100
libavdevice 61. 3.100 / 61. 3.100
libavfilter 10. 4.100 / 10. 4.100
libswscale 8. 3.100 / 8. 3.100
libswresample 5. 3.100 / 5. 3.100
libpostproc 58. 3.100 / 58. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '*REDACTED FOR PRIVACY*':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
creation_time : 2024-12-30T17:06:35.000000Z
Duration: 00:00:15.00, start: 0.000000, bitrate: 5122 kb/s
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, 5119 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 24k tbn (default)
Metadata:
creation_time : 2024-12-30T17:06:35.000000Z
handler_name : Core Media Video
vendor_id : [0][0][0][0]
Trailing garbage at the end of a stream specifier: c
Error opening output file *REDACTED FOR PRIVACY*.
Error opening output files: Invalid argument”


-
-
FFMPEG, How to stream video and audio into one file with volume adjustment and video cropping [closed]
24 décembre 2024, par Unlock iPhoneffmpeg -i "1.mp4" -i "Knockout.mp3" -filter_complex "[0:a]volume=0.1,atempo=1.1[a] ;[1:a]volume=1[b] ;[a][b]amix=inputs=2[audio]" -filter_complex "setpts=PTS/1.1,crop='min(iw\,ih1/1)' :'min(ih\,iw1/1)" -c:v libx264 -preset ultrafast -tune fastdecode -crf 20 -c:a aac -b:a 128k -r 30 -strict experimental -shortest "Output_00001.mp4"


ffmpeg -i "1.mp4" -i "Knockout.mp3" -filter_complex "[0:a]volume=0.1,atempo=1.1[a] ;[1:a]volume=1[b] ;[a][b]amix=inputs=2[audio]" -filter_complex "setpts=PTS/1.1,crop='min(iw\,ih1/1)' :'min(ih\,iw1/1)" -c:v libx264 -preset ultrafast -tune fastdecode -crf 20 -c:a aac -b:a 128k -r 30 -strict experimental -shortest "Output_00001.mp4"
ffmpeg version 2024-12-19-git-494c961379-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers
built with gcc 14.2.0 (Rev1, 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-libaribcaption —enable-libdav1d —enable-libdavs2 —enable-libopenjpeg —enable-libquirc —enable-libuavs3d —enable-libxevd —enable-libzvbi —enable-libqrencode —enable-librav1e —enable-libsvtav1 —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs2 —enable-libxeve —enable-libxvid —enable-libaom —enable-libjxl —enable-libvpx —enable-mediafoundation —enable-libass —enable-frei0r —enable-libfreetype —enable-libfribidi —enable-libharfbuzz —enable-liblensfun —enable-libvidstab —enable-libvmaf —enable-libzimg —enable-amf —enable-cuda-llvm —enable-cuvid —enable-dxva2 —enable-d3d11va —enable-d3d12va —enable-ffnvcodec —enable-libvpl —enable-nvdec —enable-nvenc —enable-vaapi —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-libcodec2 —enable-libilbc —enable-libgsm —enable-liblc3 —enable-libopencore-amrnb —enable-libopus —enable-libspeex —enable-libvorbis —enable-ladspa —enable-libbs2b —enable-libflite —enable-libmysofa —enable-librubberband —enable-libsoxr —enable-chromaprint
libavutil 59. 51.100 / 59. 51.100
libavcodec 61. 27.101 / 61. 27.101
libavformat 61. 9.101 / 61. 9.101
libavdevice 61. 4.100 / 61. 4.100
libavfilter 10. 6.101 / 10. 6.101
libswscale 8. 12.100 / 8. 12.100
libswresample 5. 4.100 / 5. 4.100
libpostproc 58. 4.100 / 58. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4' :
Metadata :
minor_version : 512
major_brand : isom
compatible_brands : isomiso2avc1mp41
metadata1 : TC1nO7kRGA2g5D7EvY6mVieKMGAICBrUodQ2askGrBS9jYT4Vj3PxKPaPJbSJiYW312zpE9OA+GfQsSmsg/l0YPpVbGHSS0k1WWlIhavn4vgaEjIiMMw5ES5FyQ6NBpt9K1YOSiIg6IEc4CgvXCVgyI5VVvX9u053QTky2KsdRNRA32Ui1XkoBTAB
metadata0 : ChtzZWN1cml0eS5rbGluZy5tZXRhX2VuY3J5cHQS8AGDblTacnE/fscfVL6m9on8gh3O9gP57LnH5Gi3m5WuoRauKnAkpgZgCqmDNvDCKcv7WjIn6u+WSNAu60xW9WLkiOodDgOO2LkcD3RQmNE435FJW7rzQGPQCWEORRjI73eTSQLHggb3O876An7Ho7eHOiOljlsdEkvPDRIGlAwfn5QZKj43rdvl4q6p0lL1Wjb6qGjdvX0e6QTI1dT9qdr
encoder : Lavf58.45.100
Duration : 00:00:10.04, start : 0.000000, bitrate : 16952 kb/s
Stream #0:00x1 : Video : h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1080x1920, 16948 kb/s, 24 fps, 24 tbr, 12288 tbn (default)
Metadata :
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Input #1, mp3, from 'Knockout.mp3' :
Metadata :
encoder : Lavf61.5.101
Duration : 00:02:14.54, start : 0.023021, bitrate : 131 kb/s
Stream #1:0 : Audio : mp3 (mp3float), 48000 Hz, stereo, fltp, 131 kb/s
Metadata :
encoder : Lavc61.12
[fc#0 @ 0000025538b16280] Stream specifier ':a' in filtergraph description [0:a]volume=0.1,atempo=1.1[a] ;[1:a]volume=1[b] ;[a][b]amix=inputs=2[audio] matches no streams.
Error binding filtergraph inputs/outputs : Invalid argument


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