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• "How can we use Ffmpeg to apply blur, overlay a logo and waveform, and add a border around a video, step by step ? [closed]

  1er février 2024, par itsfaisalkhalid

  We're looking to enhance a video using Ffmpeg by implementing several effects sequentially. First, we aim to apply a blur effect to the entire video. Then, we want to overlay a logo and a waveform onto the blurred video. Finally, we need to add a border around the entire composition. This step-by-step process requires precise commands and careful consideration of parameters to achieve the desired result effectively.

  


  I utilized Ffmpeg commands to sequentially apply blur, overlay the logo and waveform, and add a border to the video. I expected each effect to be applied in the specified order, resulting in a visually enhanced video with all desired elements. However, I encountered challenges in properly configuring the parameters for each effect, leading to unexpected results such as misaligned overlays or improper blur intensity.

  


  @echo off
setlocal enabledelayedexpansion

rem Set paths and directories
set "ffmpeg_path=C:\ffmpeg\bin\ffmpeg.exe"
set "input_dir=_input"
set "output_dir=_output"

rem Ensure input and output directories exist
if not exist "%input_dir%" (
    echo Error: Input directory "%input_dir%" not found.
    exit /b 1
)

if not exist "%output_dir%" (
    mkdir "%output_dir%"
)

rem Loop through input directory
for %%t in ("%input_dir%\*.*") DO (

    rem Process each file with ffmpeg
"%ffmpeg_path%" -y -i "%%t" -i logo.png -filter_complex "\
    [0:v]eq=brightness=0.2:saturation=2.0:contrast=1.2, crop=iw/1.2:ih/1.2, \
    boxblur=1:2 [blurred_bg]; \
    [blurred_bg][1:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h-10)[bg_with_logo]; \
    [0:a]showwaves=s=1080x100:mode=line:colors=white [waveform]; \
    [bg_with_logo][waveform]overlay=10:H-h-10, \
    format=yuv420p[v]; \
    [v]pad=iw+20:ih+20:x=10:y=10:color=white[final_output]" \
    -map "[final_output]" -map 0:a -c:v h264 -c:a aac -b:a 128k -ar 44100 "%output_dir%\temp.mp4"

    rem Check if output file exists
    if exist "%output_dir%\temp.mp4" (
        rem Calculate new MD5 hash
        certutil -hashfile "%output_dir%\temp.mp4" MD5 > "%output_dir%\temp_md5.txt"

        rem Remove ID3 tag metadata
        "%ffmpeg_path%" -i "%output_dir%\temp.mp4" -map_metadata -1 -c:v copy -c:a copy "%output_dir%\%%~nt.mp4"

        rem Clean up temporary files
        del "%output_dir%\temp.mp4"
        del "%output_dir%\temp_md5.txt"
    ) else (
        echo Error: Failed to create output file for "%%~nt"
    )
)

pause



  


• cap.isOpened() : returns false in CentOS for Python 3 and OpenCV 3.1.0

  29 octobre 2017, par Mona Jalal

  So cap from opencv 3 doesn’t work in CentOS. I had no problem in OSX or Windows 7 which I tried initially.
  Here is the example code :

  import cv2
  
  cap = cv2.VideoCapture('/home/grad3/jalal/PycharmProjects/hw4_cs58‌​5/Concession_LAN_8‌​‌​00‌​k.mp4',cv2.CAP_FFMPEG)
  
  
  
  if not cap.isOpened():
  
      print('not opened')
  
  
  
  while True:
  
      ret,frame = cap.read()
  
  
  
      if ret == False:
  
          print('frame empty')
  
          break
  
      cv2.imshow('frame', frame)
  
      if cv2.waitKey(1) == ord('q'):
  
          break

  And I get :

  /usr/local/anaconda3/bin/python /home/grad3/jalal/PycharmProjects/hw4_cs585/test.py
  
  not opened
  
  frame empty
  
  
  
  Process finished with exit code 0

  I can open the video using ffplay vid_name and also here is the result of https://pastebin.com/YGk2DDCi here https://pastebin.com/HSyHSsEZ (ffmpeg codecs). How should I fix this ?

  I have opencv 3.1.0 and here’s some sys info.

  $ uname -a
  
  Linux goku.bu.edu 3.10.0-693.5.2.el7.x86_64 #1 SMP Fri Oct 20 20:32:50 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

  and

  $ lsb_release -a
  
  LSB Version:    :core-4.1-amd64:core-4.1-noarch
  
  Distributor ID: CentOS
  
  Description:    CentOS Linux release 7.4.1708 (Core) 
  
  Release:    7.4.1708
  
  Codename:   Core
  
  
  
  cv2. getBuildInformation()
  
  General configuration for OpenCV 3.1.0 =====================================
  
    Version control:               unknown
  
  
  
    Platform:
  
      Host:                        Linux 4.8.0-46-generic x86_64
  
      CMake:                       3.6.3
  
      CMake generator:             Unix Makefiles
  
      CMake build tool:            /usr/bin/gmake
  
      Configuration:               Release
  
  
  
    C/C++:
  
      Built as dynamic libs?:      YES
  
      C++ Compiler:                /opt/rh/devtoolset-2/root/usr/bin/c++  (ver 4.8.2)
  
      C++ flags (Release):         -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -O3 -DNDEBUG  -DNDEBUG
  
      C++ flags (Debug):           -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -g  -O0 -DDEBUG -D_DEBUG
  
      C Compiler:                  /opt/rh/devtoolset-2/root/usr/bin/cc
  
      C flags (Release):           -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fopenmp -O3 -DNDEBUG  -DNDEBUG
  
      C flags (Debug):             -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fopenmp -g  -O0 -DDEBUG -D_DEBUG
  
      Linker flags (Release):
  
      Linker flags (Debug):
  
      Precompiled headers:         YES
  
      Extra dependencies:          /cs/software/anaconda3/lib/libjpeg.so /cs/software/anaconda3/lib/libpng.so /cs/software/anaconda3/lib/libtiff.so /cs/software/anaconda3/lib/libhdf5.so /usr/lib64/librt.so /usr/lib64/libpthread.so /cs/software/anaconda3/lib/libz.so /usr/lib64/libdl.so /usr/lib64/libm.so dl m pthread rt
  
      3rdparty dependencies:       libwebp libjasper IlmImf libprotobuf
  
  
  
    OpenCV modules:
  
      To be built:                 core flann hdf imgproc ml photo reg surface_matching video dnn fuzzy imgcodecs shape videoio highgui objdetect plot superres xobjdetect xphoto bgsegm bioinspired dpm face features2d line_descriptor saliency text calib3d ccalib datasets rgbd stereo structured_light tracking videostab xfeatures2d ximgproc aruco optflow stitching python3
  
      Disabled:                    world contrib_world
  
      Disabled by dependency:      -
  
      Unavailable:                 cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java python2 ts viz cvv matlab sfm
  
  
  
    GUI: 
  
      QT:                          NO
  
      GTK+:                        NO
  
      GThread :                    NO
  
      GtkGlExt:                    NO
  
      OpenGL support:              NO
  
      VTK support:                 NO
  
  
  
    Media I/O: 
  
      ZLib:                        /cs/software/anaconda3/lib/libz.so (ver 1.2.8)
  
      JPEG:                        /cs/software/anaconda3/lib/libjpeg.so (ver 80)
  
      WEBP:                        build (ver 0.3.1)
  
      PNG:                         /cs/software/anaconda3/lib/libpng.so (ver 1.6.27)
  
      TIFF:                        /cs/software/anaconda3/lib/libtiff.so (ver 42 - 4.0.6)
  
      JPEG 2000:                   build (ver 1.900.1)
  
      OpenEXR:                     build (ver 1.7.1)
  
      GDAL:                        NO
  
  
  
    Video I/O:
  
      DC1394 1.x:                  NO
  
      DC1394 2.x:                  NO
  
      FFMPEG:                      NO
  
        codec:                     NO
  
        format:                    NO
  
        util:                      NO
  
        swscale:                   NO
  
        resample:                  NO
  
        gentoo-style:              NO
  
      GStreamer:                   NO
  
      OpenNI:                      NO
  
      OpenNI PrimeSensor Modules:  NO
  
      OpenNI2:                     NO
  
      PvAPI:                       NO
  
      GigEVisionSDK:               NO
  
      UniCap:                      NO
  
      UniCap ucil:                 NO
  
      V4L/V4L2:                    YES/YES
  
      XIMEA:                       NO
  
      Xine:                        NO
  
      gPhoto2:                     NO
  
  
  
    Parallel framework:            OpenMP
  
  
  
    Other third-party libraries:
  
      Use IPP:                     9.0.1 [9.0.1]
  
           at:                     /opt/conda/conda-bld/opencv_1491943704081/work/opencv-3.1.0/3rdparty/ippicv/unpack/ippicv_lnx
  
      Use IPP Async:               NO
  
      Use VA:                      NO
  
      Use Intel VA-API/OpenCL:     NO
  
      Use Eigen:                   YES (ver 3.2.8)
  
      Use Cuda:                    NO
  
      Use OpenCL:                  NO
  
      Use custom HAL:              NO
  
  
  
    Python 2:
  
      Interpreter:                 (ver 3.5.3)
  
  
  
    Python 3:
  
      Interpreter:                 /cs/software/anaconda3/bin/python (ver 3.5.3)
  
      Libraries:                   /cs/software/anaconda3/lib/libpython3.5m.so (ver 3.5.3)
  
      numpy:                       /cs/software/anaconda3/lib/python3.5/site-packages/numpy/core/include (ver 1.12.1)
  
      packages path:               /cs/software/anaconda3/lib/python3.5/site-packages
  
  
  
    Python (for build):            
  
  
  
    Java:
  
      ant:                         NO
  
      JNI:                         NO
  
      Java wrappers:               NO
  
      Java tests:                  NO
  
  
  
    Matlab:                        NO
  
  
  
    Tests and samples:
  
      Tests:                       NO
  
      Performance tests:           NO
  
      C/C++ Examples:              NO
  
  
  
    Install path:                  /cs/software/anaconda3
  
  
  
    cvconfig.h is in:              /opt/conda/conda-bld/opencv_1491943704081/work/opencv-3.1.0/build
  
  -----------------------------------------------------------------

  UPDATE : tried .avi and .flv formats and the same problem !

• lavc : AV-prefix all codec capabilities

  7 juillet 2015, par Vittorio Giovara

  lavc : AV-prefix all codec capabilities
  Express bitfields more simply.
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] avconv.c
  • [DBH] avplay.c
  • [DBH] cmdutils.c
  • [DBH] doc/examples/avcodec.c
  • [DBH] doc/examples/output.c
  • [DBH] libavcodec/4xm.c
  • [DBH] libavcodec/8bps.c
  • [DBH] libavcodec/8svx.c
  • [DBH] libavcodec/a64multienc.c
  • [DBH] libavcodec/aacdec.c
  • [DBH] libavcodec/aacenc.c
  • [DBH] libavcodec/aasc.c
  • [DBH] libavcodec/ac3dec.c
  • [DBH] libavcodec/adpcm.c
  • [DBH] libavcodec/adxdec.c
  • [DBH] libavcodec/aic.c
  • [DBH] libavcodec/alac.c
  • [DBH] libavcodec/alacenc.c
  • [DBH] libavcodec/aliaspixdec.c
  • [DBH] libavcodec/alsdec.c
  • [DBH] libavcodec/amrnbdec.c
  • [DBH] libavcodec/amrwbdec.c
  • [DBH] libavcodec/anm.c
  • [DBH] libavcodec/ansi.c
  • [DBH] libavcodec/apedec.c
  • [DBH] libavcodec/asvdec.c
  • [DBH] libavcodec/atrac1.c
  • [DBH] libavcodec/atrac3.c
  • [DBH] libavcodec/atrac3plusdec.c
  • [DBH] libavcodec/aura.c
  • [DBH] libavcodec/avcodec.h
  • [DBH] libavcodec/avs.c
  • [DBH] libavcodec/bethsoftvideo.c
  • [DBH] libavcodec/bfi.c
  • [DBH] libavcodec/bink.c
  • [DBH] libavcodec/binkaudio.c
  • [DBH] libavcodec/bmp.c
  • [DBH] libavcodec/bmvaudio.c
  • [DBH] libavcodec/bmvvideo.c
  • [DBH] libavcodec/brenderpix.c
  • [DBH] libavcodec/c93.c
  • [DBH] libavcodec/cavsdec.c
  • [DBH] libavcodec/cdgraphics.c
  • [DBH] libavcodec/cdxl.c
  • [DBH] libavcodec/cinepak.c
  • [DBH] libavcodec/cljrdec.c
  • [DBH] libavcodec/cllc.c
  • [DBH] libavcodec/cngdec.c
  • [DBH] libavcodec/cook.c
  • [DBH] libavcodec/cscd.c
  • [DBH] libavcodec/cyuv.c
  • [DBH] libavcodec/dcadec.c
  • [DBH] libavcodec/dds.c
  • [DBH] libavcodec/dfa.c
  • [DBH] libavcodec/dnxhddec.c
  • [DBH] libavcodec/dnxhdenc.c
  • [DBH] libavcodec/dpcm.c
  • [DBH] libavcodec/dpx.c
  • [DBH] libavcodec/dsicinaudio.c
  • [DBH] libavcodec/dsicinvideo.c
  • [DBH] libavcodec/dss_sp.c
  • [DBH] libavcodec/dvdec.c
  • [DBH] libavcodec/dvenc.c
  • [DBH] libavcodec/dxa.c
  • [DBH] libavcodec/dxtory.c
  • [DBH] libavcodec/eacmv.c
  • [DBH] libavcodec/eamad.c
  • [DBH] libavcodec/eatgq.c
  • [DBH] libavcodec/eatgv.c
  • [DBH] libavcodec/eatqi.c
  • [DBH] libavcodec/escape124.c
  • [DBH] libavcodec/escape130.c
  • [DBH] libavcodec/exr.c
  • [DBH] libavcodec/ffv1dec.c
  • [DBH] libavcodec/ffv1enc.c
  • [DBH] libavcodec/fic.c
  • [DBH] libavcodec/flacdec.c
  • [DBH] libavcodec/flacenc.c
  • [DBH] libavcodec/flashsv.c
  • [DBH] libavcodec/flicvideo.c
  • [DBH] libavcodec/flvdec.c
  • [DBH] libavcodec/fraps.c
  • [DBH] libavcodec/frwu.c
  • [DBH] libavcodec/g2meet.c
  • [DBH] libavcodec/g722dec.c
  • [DBH] libavcodec/g722enc.c
  • [DBH] libavcodec/g723_1.c
  • [DBH] libavcodec/g726.c
  • [DBH] libavcodec/gifdec.c
  • [DBH] libavcodec/gsmdec.c
  • [DBH] libavcodec/h261dec.c
  • [DBH] libavcodec/h263dec.c
  • [DBH] libavcodec/h264.c
  • [DBH] libavcodec/hapdec.c
  • [DBH] libavcodec/hevc.c
  • [DBH] libavcodec/hnm4video.c
  • [DBH] libavcodec/hq_hqa.c
  • [DBH] libavcodec/hqx.c
  • [DBH] libavcodec/huffyuvdec.c
  • [DBH] libavcodec/idcinvideo.c
  • [DBH] libavcodec/iff.c
  • [DBH] libavcodec/imc.c
  • [DBH] libavcodec/indeo2.c
  • [DBH] libavcodec/indeo3.c
  • [DBH] libavcodec/indeo4.c
  • [DBH] libavcodec/indeo5.c
  • [DBH] libavcodec/intelh263dec.c
  • [DBH] libavcodec/interplayvideo.c
  • [D