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• using ffmpeg in XCode : Operation not permitted

  23 octobre 2019, par NCrusher

  In an effort to try to get to the bottom of the problem I discussed here, I decided to try to get what I was doing closer to the example I borrowed from when writing my code, which is described here.

  So instead of formatting my filters in another methods, I tried to code them directly into the method to run the conversion. Unfortunately this results in a very repetitive method, because I have to handle the switch statement for the different conversion choices here as well.

  So this is what my method looks like now :

  func ffmpegConvert() {
  
      guard let launchPath = Bundle.main.path(forResource: "ffmpeg", ofType: "") else { return }
  
      do {
  
          let conversionChoice = conversionOptionsPopup.indexOfSelectedItem
  
          switch conversionChoice {
  
              case 1 :
  
                  let convertTask: Process = Process()
  
                  convertTask.launchPath = launchPath
  
                  convertTask.arguments = [
  
                      "-y",
  
                      "-i", "\(inputFilePath)",
  
                      "-c:a", "libmp3lame",
  
                      "-ac", "1",
  
                      "-ar", "22050",
  
                      "-q:a", "9",
  
                      "\(outputFilePath)"
  
                  ]
  
                  convertTask.standardInput = FileHandle.nullDevice
  
                  convertTask.launch()
  
                  convertTask.waitUntilExit()
  
              case 2 :
  
                  let convertTask: Process = Process()
  
                  convertTask.launchPath = launchPath
  
                  convertTask.arguments = [
  
                      "-y",
  
                      "-i", "\(inputFilePath)",
  
                      "-c:a", "libmp3lame",
  
                      "-ac", "2",
  
                      "-ar", "44100",
  
                      "-q:a", "5",
  
                      "\(outputFilePath)"
  
                  ]
  
                  convertTask.standardInput = FileHandle.nullDevice
  
                  convertTask.launch()
  
                  convertTask.waitUntilExit()
  
              case 3 :
  
                  let convertTask: Process = Process()
  
                  convertTask.launchPath = launchPath
  
                  convertTask.arguments = [
  
                      "-y",
  
                      "-i", "\(inputFilePath)",
  
                      "-c:a", "libmp3lame",
  
                      "-ac", "1",
  
                      "-ar", "22050",
  
                      "-b:a", "32k",
  
                      "\(outputFilePath)"
  
                  ]
  
                  convertTask.standardInput = FileHandle.nullDevice
  
                  convertTask.launch()
  
                  convertTask.waitUntilExit()
  
              case 4 :
  
                  let convertTask: Process = Process()
  
                  convertTask.launchPath = launchPath
  
                  convertTask.arguments = [
  
                      "-y",
  
                      "-i", "\(inputFilePath)",
  
                      "-c:a", "flac",
  
                      "\(outputFilePath)"
  
                  ]
  
                  convertTask.standardInput = FileHandle.nullDevice
  
                  convertTask.launch()
  
                  convertTask.waitUntilExit()
  
              default :
  
                  let convertTask: Process = Process()
  
                  convertTask.launchPath = launchPath
  
                  convertTask.arguments = [
  
                      "-y",
  
                      "-i", "\(inputFilePath)",
  
                      "-c", "copy",
  
                      "\(outputFilePath)"
  
                  ]
  
                  convertTask.standardInput = FileHandle.nullDevice
  
                  convertTask.launch()
  
                  convertTask.waitUntilExit()
  
          }
  
      }
  
  }

  The good news is : I didn’t get the same errors I was getting before.

  The bad news is : I got a different one. "Operation not permitted."

  I assume this has something to do with the permissions granted to processes running in XCode when testing them out. Is there a way to get around it ?

  My project is really dead in the water until I get the ffmpeg implementation worked out, because everything else I’m going to want it to do—such as rechaptering audiobooks and/or editing metadata—is going to rely upon ffmpeg as well. But I’ve only been doing this a few weeks and whatever is going on here is outside my ability to troubleshoot.

  EDIT : I managed to get around this by turning the sandbox option in the permissions file off. But I’m leaving this question up because I’m not at all sure that was the right thing to do.

• MPD doesnt load ffmpeg as decoder

  10 août 2022, par dmSherazi

  I am using openwrt 21.2.3 and mpd on it. I have compile mpd full and libffmpeg full as well as ffmpeg-full packages.
But my mpd wont load ffmpeg as decoder. Also tried to force it by adding decoder { plugin “ffmpeg” enabled “no” }” line to /etc/mpd.conf

  


  below is my mpd.conf

  


  log_file "syslog"

bind_to_address "127.0.0.1"
bind_to_address "192.168.1.16"

input {
    plugin          "curl"
}

audio_output {
    type            "alsa"
    name            "sun4icodec"
    device          "plug:dmix"
    mixer_control   "Power Amplifier"
}

decoder {
     plugin  "ffmpeg"
     enabled  "yes"
}


  


  the mpd —version output is as follows

  


  Music Player Daemon 0.21.26 (v21.02.3)
Copyright 2003-2007 Warren Dukes <warren.dukes@gmail.com>
Copyright 2008-2018 Max Kellermann <max.kellermann@gmail.com>
This is free software; see the source for copying conditions.  There is NO
warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Database plugins:
 simple proxy upnp

Storage plugins:
 local curl


Decoders plugins:
 [mad] mp3 mp2
 [vorbis] ogg oga
 [oggflac] ogg oga
 [flac] flac
 [opus] opus ogg oga
 [faad] aac
 [pcm]

Filters:


Tag plugins:
 id3tag

Output plugins:
 shout null fifo pipe alsa pulse httpd recorder

Encoder plugins:
 null opus wave flac

Input plugins:
 file alsa curl mms

Playlist plugins:
 extm3u m3u pls xspf asx rss soundcloud flac cue embcue

Protocols:
 file:// alsa:// http:// https:// mms:// mmsh:// mmst:// mmsu://

Other features:
 epoll iconv inotify ipv6 tcp un


  


  ideally it should have something like this

  


  
Decoders plugins:
 [dsdiff] dff
 [dsf] dsf
 [ffmpeg] 16sv 3g2 3gp 4xm 8svx aa3 aac ac3 adx afc aif aifc aiff al alaw amr anim apc ape asf atrac au aud avi avm2 avs bap bfi c93 cak cin cmv cpk daud dct divx dts dv dvd dxa eac3 film flac flc fli fll flx flv g726 gsm gxf iss m1v m2v m2t m2ts m4a m4b m4v mad mj2 mjpeg mjpg mka mkv mlp mm mmf mov mp+ mp1 mp2 mp3 mp4 mpc mpeg mpg mpga mpp mpu mve mvi mxf nc nsv nut nuv oga ogm ogv ogx oma ogg omg opus psp pva qcp qt r3d ra ram rl2 rm rmvb roq rpl rvc shn smk snd sol son spx str swf tak tgi tgq tgv thp ts tsp tta xa xvid uv uv2 vb vid vob voc vp6 vmd wav webm wma wmv wsaud wsvga wv wve
 [pcm]

Filters:




  


  here are logs from mpd deamon

  


  Output of ffmpeg command

  


  
Mon Jul 25 09:40:30 2022 daemon.err mpd[1969]: exception: Error in /etc/mpd.conf line 17; Unknown tokens after '{'
Mon Jul 25 09:44:23 2022 daemon.debug mpd: vorbis: Xiph.Org libVorbis 1.3.7
Mon Jul 25 09:44:23 2022 daemon.debug mpd: opus: libopus 1.3.1-fixed
Mon Jul 25 09:44:23 2022 daemon.debug mpd: curl: version 7.82.0
Mon Jul 25 09:44:23 2022 daemon.debug mpd: curl: with mbedTLS/2.16.12


  


  ffmpeg version 4.3.3 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 8.4.0 (OpenWrt GCC 8.4.0 r16554-1d4dea6d4f)
  configuration: --enable-cross-compile --cross-prefix=arm-openwrt-linux-muslgnueabi- --arch=arm --cpu=cortex-a7 --target-os=linux --prefix=/usr --pkg-config=pkg-config --enable-shared --enable-static --enable-pthreads --enable-zlib --disable-doc --disable-debug --disable-lzma --disable-vaapi --disable-vdpau --disable-outdevs --disable-runtime-cpudetect --enable-lto --enable-vfp --enable-neon --enable-vfp --disable-x86asm --enable-hardcoded-tables --enable-gpl --enable-version3 --enable-nonfree --disable-swscale --disable-everything --enable-encoder=ac3 --enable-encoder=jpegls --enable-encoder=mpeg1video --enable-encoder=mpeg2video --enable-encoder=pcm_s16be --enable-encoder=pcm_s16le --enable-encoder=png --enable-encoder=vorbis --enable-encoder=zlib --enable-decoder=aac --enable-decoder=ac3 --enable-decoder=alac --enable-decoder=amrnb --enable-decoder=amrwb --enable-decoder=ape --enable-decoder=flac --enable-decoder=jpegls --enable-decoder=mp2 --enable-decoder=mp3 --enable-decoder=mpeg1video --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=mpegvideo --enable-decoder=mpc7 --enable-decoder=mpc8 --enable-decoder=pcm_s16be --enable-decoder=pcm_s16le --enable-decoder=png --enable-decoder=vorbis --enable-decoder=wavpack --enable-decoder=wmav1 --enable-decoder=wmav2 --enable-decoder=zlib --enable-muxer=ac3 --enable-muxer=mp3 --enable-muxer=mp4 --enable-muxer=mpeg1video --enable-muxer=mpeg2video --enable-muxer=mpegts --enable-muxer=ogg --enable-muxer=rtp --enable-demuxer=aac --enable-demuxer=ac3 --enable-demuxer=amr --enable-demuxer=ape --enable-demuxer=avi --enable-demuxer=flac --enable-demuxer=matroska --enable-demuxer=mov --enable-demuxer=mp3 --enable-demuxer=mpegps --enable-demuxer=mpegts --enable-demuxer=mpegvideo --enable-demuxer=mpc --enable-demuxer=mpc8 --enable-demuxer=ogg --enable-demuxer=rm --enable-demuxer=rtsp --enable-demuxer=rtp --enable-demuxer=sdp --enable-demuxer=wav --enable-demuxer=wv --enable-parser=aac --enable-parser=flac --enable-parser=ac3 --enable-parser=mpegaudio --enable-parser=mpeg4video --enable-parser=mpegvideo --enable-protocol=file --enable-protocol=http --enable-protocol=icecast --enable-protocol=pipe --enable-protocol=rtp --enable-protocol=tcp --enable-protocol=udp --enable-decoder=adpcm_ima_wav --enable-decoder=adpcm_ima_qt --enable-decoder=adpcm_ms --enable-libfdk-aac --enable-encoder=libfdk_aac --enable-libmp3lame --enable-encoder=libmp3lame --enable-libopus --enable-decoder=libopus --enable-encoder=libopus --enable-libshine --enable-encoder=libshine --disable-postproc
  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
  libswresample   3.  7.100 /  3.  7.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...


  


• cannot capture a good frame of faces from IP camera [on hold]

  16 octobre 2018, par wiwengweng

  everyone. I am working on some research about getting frames from IP camera, and then detect and recognize faces. There is some implements on the last two steps. And my first problem is to judge if a frame with faces is good enough for detection. Video stream is read by OpenCV and/or ffmpeg, and there are many ways to capture frames one by one.

  As we know, people are always walking through, so frames captured from IP camera is not always good. But the good news is the if we extract the frames from the IP camera video file, we find some frames good enough for detection.

  I also try de-blurring pictures of frames using GAN, but that will need more time, so I think that is not an ideal way. So any advice is welcome.