Recherche avancée

Sur d’autres sites (3529)

• operations (resize, crop...) over images with output pipeline using ffmpeg

  7 juin 2021, par Ondřej Dobrovolný

  I have been experimenting with ffmpeg in C# using System.Diagnostics.Process. Im trying to do some basic operations such as resizing, croping and adding watermarks over image. So far i managed everything well but now i am trying to load image from some storage (C :/ ....), do some operation and then use pipeline to feed the image to memory so that i can work with it further.
This is the command itself

  


  "-i C:\Work\PrivateTestingRepos\ImageProcessingTest\MyTestingApplication\FfmpegProcessTest\src\guid.jpg -vf "scale=1024:768" -f png_pipe pipe:1"


  


  and this produces following error :

  


  error: ffmpeg version N-102608-g7a879cce37 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  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 --disable-w32thread
s --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enabl
e-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enabl
e-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enabl
e-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 --ex
tra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp
  libavutil      57.  0.100 / 57.  0.100
  libavcodec     59.  1.100 / 59.  1.100
  libavformat    59.  2.101 / 59.  2.101
  libavdevice    59.  0.100 / 59.  0.100
  libavfilter     8.  0.101 /  8.  0.101
  libswscale      6.  0.100 /  6.  0.100
  libswresample   4.  0.100 /  4.  0.100
  libpostproc    56.  0.100 / 56.  0.100
Input #0, image2, from 'C:\Work\PrivateTestingRepos\ImageProcessingTest\MyTestingApplication\FfmpegProcessTest\src\guid.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 280300 kb/s
  Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 2735x1904, 25 fps, 25 tbr, 25 tbn
[NULL @ 0000024cfa5d8400] Requested output format 'png_pipe' is not a suitable output format
pipe:1: Invalid argument


  


  From error it look like ffmpeg tries to load the image as Image2 which is some kind of video format and when i tell it to save it as png pipeline it throws error which is understandable.
Is there some way of using ffmpeg to this kind of operations over images ? Iam aware that its mostly used for videos and images are secondary feature.
If necessary i can provide source codes.
Thanks for your time ! :)

  


• Suppress output of ffmpeg in bash [duplicate]

  24 février 2021, par Arghadip

  I'm writing a script which can take screenshots from videos, and I've used ffmpeg and mplayer. But both of them outputing too much information, I want to suppress everything, how can I do it ? I'm running macOS Bigsur.

  


  Command

  


  ffmpeg -ss 00:30:00 -i hello.mp4 -vframes 1 -q:v 2 hello.jpg


  


  Output

  


  ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --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-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'films/53f860.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.65.100
  Duration: 01:37:06.15, start: 0.000000, bitrate: 2383 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/unknown), 1920x1072 [SAR 1:1 DAR 120:67], 2249 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x7fdf43aa1000] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to 'output.jpg':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 1920x1072 [SAR 1:1 DAR 120:67], q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.91.100 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame=    1 fps=0.0 q=2.0 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.316x    
video:154kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown


  


• How to manipulate audio volume in ffmpeg

  24 juin 2021, par JohnTerry

  I am working on a ffmpeg command to overlay background music to a video which already has audio.

  


  below is the command -

  


      ffmpeg -i video_with_audio.webm -stream_loop -1 -i overlay_music.mp3 -vcodec copy -filter_complex amix -acodec libopus -mapping_family 0 -b:a 96k -shortest -map 0:v:0 -map 1:a:0 output_video.webm


  


  the above command is working fine but i also want to control the volume of the both audios.
so for this purpose i am using the command-

  


      cmd = "ffmpeg -i {} -filter_complex 'amovie='{}':loop=0,asetpts=N/SR/TB,volume=1[audio];[0:a]volume=3[sa];[sa][audio]amix[fa]' -map 0:v -map [fa] -vcodec copy -acodec libopus -preset ultrafast -shortest {}".format(inp_video, bg, out_video)
    os.system(cmd)


  


  but i am getting an error while passing online url-

  


    ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-cuda --enable-cuda-sdk --enable-cuvid --enable-libdrm --enable-ffplay --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libnpp --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopus --enable-libpulse --enable-sdl2 --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-nonfree --enable-nvenc --enable-omx --enable-openal --enable-opencl --enable-runtime-cpudetect --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-xlib
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, matroska,webm, from '/home/abc/Desktop/abc/input_video.webm':
  Metadata:
    COMPATIBLE_BRANDS: isomiso2avc1mp41
    MAJOR_BRAND     : isom
    MINOR_VERSION   : 512
    ENCODER         : Lavf58.45.100
  Duration: 00:03:52.07, start: -0.007000, bitrate: 1179 kb/s
    Stream #0:0: Video: vp9 (Profile 0), yuv420p(tv), 854x480, SAR 1:1 DAR 427:240, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      HANDLER_NAME    : ISO Media file produced by Google Inc.
      ENCODER         : Lavc58.91.100 libvpx-vp9
      DURATION        : 00:03:52.007000000
    Stream #0:1: Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      HANDLER_NAME    : ISO Media file produced by Google Inc.
      ENCODER         : Lavc58.91.100 libopus
      DURATION        : 00:03:52.068000000
[Parsed_amovie_0 @ 0x56189e8f9900] Failed to avformat_open_input 'https'
[AVFilterGraph @ 0x56189e947e00] Error initializing filter 'amovie' with args 'https://dapi.videowiki.pt/media/music-lib/2021/04/05/31/21/bensound-creativeminds.mp3:loop=0'
Error initializing complex filters.
No such file or directory