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• FFmpeg Android concat. "–safe 0" is an invalid argument

  18 avril 2020, par AK. Bab

  I am trying to append two .mp4 videos on Android. Following an unsafe file name error with command :

  



  String[] complexCommand = {"ffmpeg", "-f", "concat", "-i", list, "-c", "copy", outputFilePath};


  



  I added the string "–safe 0" as recommended on FFmpeg documentation :

  



  String[] complexCommand = {"ffmpeg", "-f", "concat","–safe 0", "-i", list, "-c", "copy", outputFilePath};


  



  However, FFmpeg does not recognise the command, giving this error message :

  



  Failure with output
 ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
   built with gcc 4.8 (GCC)
   configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
   libavutil      55. 17.103 / 55. 17.103
   libavcodec     57. 24.102 / 57. 24.102
   libavformat    57. 25.100 / 57. 25.100
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 31.100 /  6. 31.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Unrecognized option ‘–safe 0'.
Error splitting the argument list: Option not found


  



  I have tried various permutations with the type of dash (–) and (-), used, but still get an error. Sometimes, using a certain dash or no dash at all returns a slightly different error message :

  



  Failure with output
I/System.out: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
I/System.out:   built with gcc 4.8 (GCC)
I/System.out:   configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
I/System.out:   libavutil      55. 17.103 / 55. 17.103
   libavcodec     57. 24.102 / 57. 24.102
   libavformat    57. 25.100 / 57. 25.100
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 31.100 /  6. 31.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, tty, from '/data/user/0/com.example.cameraapp2/cache/ffmpeg-list1251307830.txt':

Duration: 00:00:00.04, bitrate: 28 kb/s
     Stream #0:0: Video: ansi, pal8, 640x400, 25 fps, 25 tbr, 25 tbn, 25 tbc
 [NULL @ 0xed834600] Unable to find a suitable output format for 'ffmpeg'
 ffmpeg: Invalid argument


  



  However, amendments I make there (such as removing "ffmpeg") haven't resolved the issue.

  



  String list is the absolute path of a textfile, generated with code I have copied written by user Marc Plano-Lesay :

  



  private static String generateList(String[] inputs) {
    File list;
    Writer writer = null;
    try {
        list = File.createTempFile("ffmpeg-list", ".txt");
        writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(list)));
        for (String input: inputs) {
            writer.write("file '" + input + "'\n");
        }
    } catch (IOException e) {
        e.printStackTrace();
        return "/";
    } finally {
        try {
            if (writer != null)
                writer.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }


  



  and here are relevant code snippets that refers to it :

  



  inputFilePath1 = "/storage/emulated/0/Pictures/MyCameraApp/VID_20200416_162058.mp4";
inputFilePath2 = "/storage/emulated/0/Pictures/MyCameraApp/VID_20200418_104909.mp4";


  



  String list = generateList(new String[] {inputFilePath1, inputFilePath2});

  



  Android can usually find the input files just fine, so I'm not sure what's left to try. The error messages above confirm my assumption that I'm running FFmpeg 0.3.1 which should be recent enough.

  



  Thank you for any help.

  


• "FFmpeg was not found, spotdl can't continue" even though its installed using sudo apt-get install spotdl + it works if ran from terminal

  23 juin 2022, par dank rainbow

  @bot.command()
async def getsong(ctx, *, songname):
    "get song in mp3 from song name"
    os.popen(f'spotdl {songname} -f "/home/pi/discordbot/output/{songname}.mp3"')
    await ctx.send(file=discord.File(fr'/home/pi/discordbot/output/{songname}.mp3'))


  


  ffmpeg installed with sudo-apt get. works if ran from terminal
how to fix ?

  


  figured it out my self.
working code if it benefits anyone :

  


  @bot.command()
async def getsong(ctx, *, songname):
    "get song in mp3 from song name"
    subprocess.Popen(f'spotdl -o "/home/pi/discordbot/output" --ffmpeg "/usr/bin/ffmpeg" {songname} --path-template "{songname}.mp3"', shell=True)
    await ctx.send(file=discord.File(fr'/home/pi/discordbot/output/{songname}.mp3'))


  


• Supported audio and video formats in Windows Store apps

  27 décembre 2013, par TheQuestioner

  I searched a lot on the internet and I know that this problem has been discussed on several forums, but because I am making a media player and I intend to sell it, I fell the need to ask for a more complete answer.
  As I understand, this is the list with the audio and video formats available in Windows Store Apps : http://msdn.microsoft.com/en-us/library/windows/apps/hh986969.aspx. This are indeed the most used formats for playing audio and video, but I truly fell the lack of support for the .MKV files. So my questions are :

  1. Will Microsoft include .MKV in that list ? When ?
  2. Can I somehow include the .MKV codec in my app ? (or other codecs, like .flv)
  3. If I can't add the MKV codec in my app and Microsoft doesn't intend to add it, is there a way that I can convert the .MKV in , let's say, a .MP4 so that my app can be able to play it ?

  I know that I'm not the first that asks this questions, but I didn't find anywhere a good/complete answer or solution to this problem.

  In my opinion .MKV in pretty popular already. Searching for media players in the Windows Store I found one which claims that it supports .MKV (but only if you buy it, so I didn't try it). So is this possible ? How ?