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• ffmpeg Output file #0 does not contain any stream during the extraction of audio from a .webm file

  17 mai 2023, par Leo

  my objective is to extract frames and corresponding audio from a .webm file.

  


  The problem comes when I am extracting the audio from the .webm file.

  


  When I try to extract the audio from the .webm. ffmpeg -i _5rNOD1nsDg.webm -vn -y -ar 44100 -ac 2 output.wav

  


  I get something like below and there is not any .wav file generated.
 ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 11 (Ubuntu 11.2.0-19ubuntu1) configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil      56. 70.100 / 56. 70.100 libavcodec     58.134.100 / 58.134.100 libavformat    58. 76.100 / 58. 76.100 libavdevice    58. 13.100 / 58. 13.100 libavfilter     7.110.100 /  7.110.100 libswscale      5.  9.100 /  5.  9.100 libswresample   3.  9.100 /  3.  9.100 libpostproc    55.  9.100 / 55.  9.100 Input #0, matroska,webm, from '_5rNOD1nsDg.webm': Metadata: encoder         : google/video-file Duration: 00:10:08.96, start: 0.000000, bitrate: 18219 kb/s Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 3840x2160, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Output #0, wav, to 'output.wav': Output file #0 does not contain any stream

  


• Added option to group files in one XHR request based on their file size and the upload file size limit

  15 novembre 2013, par ottens

  Added option to group files in one XHR request based on their file size and the upload file size limit
  If your upload limit is say 1MB and you have 100 files of 20Kb you could set the limitMultiFileUploads to 50 to minimize requests. However is there is one 30kb file the batch containing that group will fail. So I coded an uploadSizeLimitMultiFileUploads option that will calculate the max number of files that fit in one request based on a set upload size. I added a 512 bytes overhead for each file for the calculations to be on the safe side. Hope you find these useful, it is very useful if you want to upload 1000s of small files. Thanks
  Signed-off-by : Maarten Ottens <m@maartenottens.com>
  

• Flutter Ffmpeg video compress error No such file or directory, but file exists

  29 octobre 2020, par fff

  In a Flutter project, I'm trying to compress a video using Ffmpeg (min-gpl) and, only in iOS, I get the error

  


  


  flutter : /var/mobile/Containers/Data/Application/6C20B1B1_compressed-D6BD-421B-98E3-21123BF15A04/Documents/videos/raw/VID_20201025_224514.mp4 : No such file or directory

  


  


  


  flutter : FFmpeg process exited with rc 1

  


  


  , but, if I do this, right before I run the ffmpeg command,

  


      print(File(videoPath).existsSync().toString());


  


  returns "true".

  


  int rc = new FlutterFFmpeg()
    .execute(
        "-loglevel error -y -i ${videoPath} -vcodec libx264 -vprofile high -preset veryfast -b:v 1000k -maxrate 1000k -bufsize 1000k -vf \"pad=ceil(iw/2) * 2:ceil(ih/2)*2\" -threads 1 -b:a 128k ${outputPath}")
    .catchError((err) => _onCompressError(outputPath, err));

debugPrint("FFmpeg process exited with rc $rc");


  


  I've done the integration using flutter-ffmpeg and there is indeed a video in that path. For the path I used path_provider.

  


  Thanks in advance