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• Node js fluent-ffmpeg silencedetect info to CSV

  6 août 2023, par Eugene

  I am trying get timestamps of in and out points of silent parts of an audio file. The duration of the silent part is 5-7sec, sometimes the part have some random single noises.
Ideally as a final result I want get JSON or csv file with all info

  


  I am new to nodeJS and I am not sure how to access the outputs of the ffmpeg 'silencedetect' filter. I have been trying to console.log output of the code below but it didn't work


  


  


  var ffmpeg = require('fluent-ffmpeg');
ffmpeg(audioPath)
  .audioFilters('silencedetect=n=-50dB:d=5');

  


  


  



  

  


• Batch screenshots with FFmpeg

  20 juillet 2017, par cCanuck

  I have this bat file that works with another software and I would like to modify it to work with FFmpeg but I haven’t been able to get the syntax or arguments correct

  I essentially have a series of 1hr videos on an external HDD I want to extract an screenshot every 15mins to folder on my computer. I could do it successfully with FFmpeg from the CMD but not in a bat file.

  @echo off
  
  pause
  
  
  
  FOR /F "tokens=*" %%A IN ('dir E:\BIW\*.asf /b') DO "c:\Program Files (x86)\FrameShots3\fsconsole.exe" -ms 900000 -width 1920 -height 1080 -filetype JPEG -filename BIW_ -filecounter 0000 "E:\BIW\%%A" "C:\timelapse\BIW\"
  
  pause

• How to build dense trajectory without sudoers permission

  8 février 2019, par Albe

  I’m stuck for a week trying to install iDT(https://github.com/chuckcho/iDT) in a server hosted by university in which I don’t have root permissions. (VERSION=12.04.5 LTS)

  I tried to install the 2 main libraries (opencv and ffmpeg) following part(different versions) of this tutorial : http://dridini.blogspot.com/

  I managed (I think) to install the libraries in local :

  ffmpeg -version
  
  ffmpeg version N-93084-g835ab35 Copyright (c) 2000-2019 the FFmpeg developers
  
  built with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
  configuration: --prefix=/home/XXXXX/ffmpeg_build --extra-cflags=-I/home/XXXXX/ffmpeg_build/include --extra-ldflags=-L/home/XXXXX/ffmpeg_build/lib --bindir=/home/XXXXX/bin --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libmp3lame --enable-libvorbis --enable-libx264 --enable-pic --enable-shared
  
  libavutil      56. 26.100 / 56. 26.100
  
  libavcodec     58. 46.100 / 58. 46.100
  
  libavformat    58. 26.100 / 58. 26.100
  
  libavdevice    58.  6.101 / 58.  6.101
  
  libavfilter     7. 48.100 /  7. 48.100
  
  libswscale      5.  4.100 /  5.  4.100
  
  libswresample   3.  4.100 /  3.  4.100
  
  libpostproc    55.  4.100 / 55.  4.100 
  
  
  
  pkg-config --modversion opencv
  
  2.4.13.5

  I exported the LD_LIBRARY_PATH where all .so are.(I cannot perform ldconfig after)
  But when I try to make this is the result :

  g++ -L/home/chuck/opencv-2.4.11-cuda7.5/lib -L/opt/lib -pipe -Wall -O3 -ggdb -o release/DenseTrackStab  -lopencv_core -lopencv_highgui -lopencv_video -lopencv_imgproc -lopencv_calib3d -lopencv_features2d -lopencv_nonfree -lopencv_ocl -lavformat -lavdevice -lavutil -lavcodec -lswscale
  
  /usr/bin/ld: cannot find -lopencv_core
  
  /usr/bin/ld: cannot find -lopencv_highgui
  
  /usr/bin/ld: cannot find -lopencv_video
  
  /usr/bin/ld: cannot find -lopencv_imgproc
  
  /usr/bin/ld: cannot find -lopencv_calib3d
  
  /usr/bin/ld: cannot find -lopencv_features2d
  
  /usr/bin/ld: cannot find -lopencv_nonfree
  
  /usr/bin/ld: cannot find -lopencv_ocl
  
  /usr/bin/ld: cannot find -lavformat
  
  /usr/bin/ld: cannot find -lavdevice
  
  /usr/bin/ld: cannot find -lavutil
  
  /usr/bin/ld: cannot find -lavcodec
  
  /usr/bin/ld: cannot find -lswscale
  
  collect2: ld returned 1 exit status
  
  make: *** [release/DenseTrackStab] Error 1

  I tried to modify the makeFile in order to add there the path or typing make with ldflag ( make "LDFLAGS=-L/$HOME/lib/opencv-2.4.13.5/lib/ -L/$HOME/ffmpeg_build/lib") giving me the same result :

  g++ -L/home/XXXXX/opencv-2.4.13.5/release/lib -L/opt/lib -pipe -Wall -O3 -ggdb -o release/DenseTrackStab  -lopencv_core -lopencv_highgui -lopencv_video -lopencv_imgproc -lopencv_calib3d -lopencv_features2d -lopencv_nonfree -lopencv_ocl -lavformat -lavdevice -lavutil -lavcodec -lswscale
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 0 has invalid symbol index 10
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 1 has invalid symbol index 11
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 2 has invalid symbol index 2
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 3 has invalid symbol index 2
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 4 has invalid symbol index 10
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 5 has invalid symbol index 12
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 6 has invalid symbol index 12
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 7 has invalid symbol index 12
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 8 has invalid symbol index 2
  
  /usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 9 has invalid symbol index 2

  This is the original Makefile

  # custom opencv
  
  OPENCV_INC := /home/chuck/opencv-2.4.11-cuda7.5/include
  
  OPENCV_LIB := /home/chuck/opencv-2.4.11-cuda7.5/lib
  
  
  
  # set the binaries that have to be built
  
  TARGETS := DenseTrackStab Video
  
  
  
  # set the build configuration set 
  
  BUILD := release
  
  #BUILD := debug
  
  
  
  # set bin and build dirs
  
  BUILDDIR := .build_$(BUILD)
  
  BINDIR := $(BUILD)
  
  
  
  # libraries 
  
  LDLIBS = $(addprefix -l, $(LIBS) $(LIBS_$(notdir $*)))
  
  LIBS := \
  
      opencv_core opencv_highgui opencv_video opencv_imgproc opencv_calib3d opencv_features2d opencv_nonfree \
  
      opencv_ocl \
  
      avformat avdevice avutil avcodec swscale
  
  
  
  # set some flags and compiler/linker specific commands
  
  CXXFLAGS = -pipe -D __STDC_CONSTANT_MACROS -D STD=std -Wall $(CXXFLAGS_$(BUILD)) -I. -I$(OPENCV_INC) -I/opt/include
  
  CXXFLAGS_debug := -ggdb
  
  CXXFLAGS_release := -O3 -DNDEBUG -ggdb
  
  LDFLAGS = -L$(OPENCV_LIB) -L/opt/lib -pipe -Wall $(LDFLAGS_$(BUILD))
  
  LDFLAGS_debug := -ggdb
  
  LDFLAGS_release := -O3 -ggdb
  
  
  
  include make/generic.mk

  Is it possible what I’m trying to do or I must give up ? Any better solution for using this software ?
  thank you