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• Node-JS convert mp4 to m3u8 with FFMPEG : Unable to find a suitable output format for 'v:1,a:1"'

  18 mars 2021, par Jérémy Gachon

  I am writing a server-side function to convert a mp4 file to m3u8, but there is an error with the differents video size. I want to have my video in differents sizes (4k UHD, 2k, 1080p, 720p...) but, with this line : "-var_stream_map", "'v:0,a:0 v:1,a:1'",, there is an error :

  


  


  [NULL @ 0x7fe9de00d800] Unable to find a suitable output format for 'v:1,a:1"'
v:1,a:1" : Invalid argument

  


  


  When I delete this line, all work, but I have just the v0 in 640x360 and not the v1 (960x540).

  


  How can I bypass this error to have all the video sizes ?

  


  const ffmpeg = require('fluent-ffmpeg');
var infs = new ffmpeg

infs.addInput(doc.data().url).outputOptions([
            '-preset slow', '-g 48', '-sc_threshold 0',
            '-map 0:0', '-map 0:1', '-map 0:0', '-map 0:1',
            '-s:v:0 640x360', '-c:v:0 libx264', '-b:v:0 365k',
            '-s:v:1 960x540', '-c:v:1 libx264', '-b:v:1 2000k',
            "-var_stream_map", "'v:0,a:0 v:1,a:1'",
            '-master_pl_name master.m3u8',
            '-f hls', '-hls_time 6', '-hls_list_size 0',
            '-hls_segment_filename fileSequence%d|v%v.ts',
            '-max_muxing_queue_size 1024',
        ]).output('./video.m3u8')
            .on('start', function (commandLine) {
                console.log('Spawned Ffmpeg with command: ' + commandLine);
            })
            .on('error', function (err, stdout, stderr) {
                console.log('An error occurred: ' + err.message, err, stderr);
            })
            .on('progress', function (progress) {
                console.log('Processing: ' + progress.percent + '% done')
            })
            .on('end', function (err, stdout, stderr) {
                console.log('Finished processing!' /*, err, stdout, stderr*/)
            })
            .run() 


  


• What does "dash" - mean as ffmpeg output filename

  26 août 2020, par DDS

  I'm trying to use ffmpeg with gnuplot to draw some audio spectra, I'm following this ffmpeg doc link.

  


  Now I'm asking what "dash" - means on this line right after -f data, it should be a filename : the last element of ffmpeg command should the output file but I have no files named - in the directory after running the command.

  


  ffmpeg -y -i in.wav -ac 1 -filter:a aresample=8000 -map 0:a -c:a pcm_s16le -f data - | gnuplot -p -e "plot 'code>

  


  I looked on ffmpeg docs but I didn't find anything.

  


• ffmpeg -var_stream_map Invalid keyval "v:0

  22 septembre 2020, par rmrf fly

  the ffmpeg command is correct,

  


  use ffmpeg command execute at command line is ok，

  


  int windows10 use java exec the command is ok ,

  


  by only in linux when i use java exec the ffmpeg command throw expection

  


  the command :

  


  ffmpeg -i /data/vsftpd/Anchor.mp4 -b:v:0 1000k -b:v:1 256k -b:a:0 64k -b:a:1 32k -map 0:v -map 0:a -map 0:v -map 0:a -f hls -var_stream_map "v:0,a:0 v:1,a:1" -hls_segment_filename 'file_%v_%03d.ts' out_%v.m3u8


  


  enter image description here

  


  [hls @ 0xd31b5c0] Invalid keyval "v:0
[hls @ 0xd31b5c0] Variant stream info update failed with status ffffffea
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument


  


  jar

  


  <dependency>&#xA;   <groupid>org.apache.commons</groupid>&#xA;   <artifactid>commons-exec</artifactid>&#xA;   <version>1.3</version>&#xA;</dependency>&#xA;

  


  java code

  


  public static int exeCommand(String command, OutputStream out) throws ExecuteException, IOException {
    CommandLine commandLine = CommandLine.parse(command);
    PumpStreamHandler pumpStreamHandler = null;
    if (null == out) {
        pumpStreamHandler = new PumpStreamHandler();
    } else {
        pumpStreamHandler = new PumpStreamHandler(out);
    }

    // time out 10s
    ExecuteWatchdog watchdog = new ExecuteWatchdog(10000);

    DefaultExecutor executor = new DefaultExecutor();
    executor.setStreamHandler(pumpStreamHandler);
    //executor.setWatchdog(watchdog);

    return executor.execute(commandLine);
}