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• difference overlay filter ffmpeg like photoshop/affinity photo

  14 janvier, par Owen Quinlan

  In photoshop and affinity photo there is a nice overlay filter that basically subtracts the overlaying layer from the one bellow to make a "difference map"

  


  Example :
Base image :
Screenshot Mario Kart 1

  


  Overlaying image :
Screenshot Mario Kart 2

  


  Resulting output :
Diff from two screenshots

  


  This is an example diff of overlaying a PNG with a JpegXL(I think) compressed image and then brightened :
Diff generated from image compression

  


  Location of filter in photoshop :
Photoshop screenshot

  


  Is there anyway to accomplish this with a filter in ffmpeg for an entire video ?

  


• ffmpeg video download shows errors in log

  15 juin 2022, par PeterM

  i'm trying to download media (video) files from sharepoint (i have view access), but during the process i get several "Connection to tcp ://xxx.xxxxx.ms:443 failed : Error number -138 occurred" or "HTTP error 503 Service Unavailable" errors (see following screenshots : tcp error HTTP error 503 )

  


  i get more errors with the following parameters :

  


  ffmpeg -i "https://theURLtoTheManifestYouCopiedHere" -codec copy downloadedVideo.mp4


  


  less errors with :

  


  ffmpeg -re -vsync 1 -i "https://theURLtoTheManifestYouCopiedHere" -codec copy downloadedVideo.mp4


  


  the options suggested in this article didn't help : https://medium.com/intrasonics/robust-continuous-audio-recording-c1948895bb49

  


  the output video is ok, but sound seems to be missing occasionally (a few seconds worth)

  


  ffmpeg version used is 2022-06-12-git-4d45f5acbd-essentials_build-www.gyan.dev (executable for windows)

  


  any advice ?

  


• Download m3u8 video from a webpage

  26 août 2024, par Ogiwara Sayu

  I want to download a video from a webpage. I found the m3u8 file and got the link, using them in FFmpeg, finally got something wrong.

  


  Here is the capture of the beginning of the m3u8 file.

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-ALLOW-CACHE:YES
#EXT-X-TARGETDURATION:13
#EXTINF:10.080000,
https://ddcdn.jd.com/ddimg/jfs/t1/203028/24/17499/1876858/61a85ec0Ef32e255f/289bf6dd94343ed0.bmp
#EXTINF:10.000000,
https://ddcdn.jd.com/ddimg/jfs/t1/140366/35/22093/1147042/61a85ec0E850c8c8e/30b8a5e3032486ea.bmp
#EXTINF:10.000000,
https://ddcdn.jd.com/ddimg/jfs/t1/213475/10/6333/1554250/61a85ec0Ecc4703c3/39107a4d803fc188.bmp
#EXTINF:8.040000,
https://ddcdn.jd.com/ddimg/jfs/t1/205672/5/17259/1669682/61a85ec0Eff60ae58/fca014f8ef9bdcdc.bmp
#EXTINF:10.000000,
https://ddcdn.jd.com/ddimg/jfs/t1/217728/38/6334/1906374/61a85ec0Eeaf23ef5/d9ec645ad064f527.bmp


  


  Here is what I input and output in the cmd.

  


  Input

ffmpeg -i "https://hls.kmzhiqing.com/hls/m3u8/1452590c00595055de5750d1595519554f525372617d0d4061.m3u8" 1.mp4


  


  Output

ffmpeg version N-100036-g3de3d2f5e2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3-win32 (GCC) 20200320
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-shared --disable-static --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-opencl --enable-libvmaf --enable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 60.100 / 56. 60.100
  libavcodec     58.113.100 / 58.113.100
  libavformat    58. 64.100 / 58. 64.100
  libavdevice    58. 11.103 / 58. 11.103
  libavfilter     7. 90.100 /  7. 90.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
[hls @ 000001d87d857740] Skip ('#EXT-X-VERSION:3')
[hls @ 000001d87d857740] Skip ('#EXT-X-ALLOW-CACHE:YES')
[hls @ 000001d87d857740] Opening 'https://ddcdn.jd.com/ddimg/jfs/t1/203028/24/17499/1876858/61a85ec0Ef32e255f/289bf6dd94343ed0.bmp' for reading
[hls @ 000001d87d857740] Opening 'https://ddcdn.jd.com/ddimg/jfs/t1/140366/35/22093/1147042/61a85ec0E850c8c8e/30b8a5e3032486ea.bmp' for reading
[hls @ 000001d87d857740] Could not find codec parameters for stream 0 (Video: bmp, none): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, hls, from 'https://hls.kmzhiqing.com/hls/m3u8/1452590c00595055de5750d1595519554f525372617d0d4061.m3u8':
  Duration: 00:24:24.60, bitrate: N/A
  Program 0
    Metadata:
      variant_bitrate : 0
    Stream #0:0: Video: bmp, none, 25 tbr, 25 tbn, 25 tbc
    Metadata:
      variant_bitrate : 0
Output #0, mp4, to '1.mp4':
Output file #0 does not contain any stream


  


  I found that the the link in the m3u8 file is a bmp file instead of mp4.

  


  Does it matter ????
Can anyone tell me how to download the mp4 video file ?

  


  Thank you for reading this !