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  • ffmpeg : Pipe input error

    1er septembre 2012, par Amit Khanna

    I'm facing an issue while working with ffmpeg when input and output are pipes. Though Output pipe is working fine, piping the input is causing some error.

    I tried to convert mp4 video to flv using the following command and it worked fine :

    $ ffmpeg  -i video-2012-04-26-19-48-40.mp4 -ar 44100 -ab 96 -f flv pipe:1 | cat> videoname.flv

    It worked fine and gave the following output :

    FFmpeg version 0.6-4:0.6-2ubuntu6.3, Copyright (c) 2000-2010 the FFmpeg developers
    
  built on Dec 21 2011 18:37:43 with gcc 4.4.5
    
  configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
    
  WARNING: library configuration mismatch
    
  libavutil   configuration: --extra-version=4:0.6-2ubuntu3.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavcodec  configuration: --extra-version=4:0.6-2ubuntu3.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavformat configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavdevice configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavfilter configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libswscale  configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libpostproc configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavutil     50.15. 1 / 50.15. 1
    
  libavcodec    52.72. 2 / 52.72. 2
    
  libavformat   52.64. 2 / 52.64. 2
    
  libavdevice   52. 2. 0 / 52. 2. 0
    
  libavfilter    1.19. 0 /  1.19. 0
    
  libswscale     0.11. 0 /  0.11. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    

    
Seems stream 0 codec frame rate differs from container frame rate: 60000.00 (60000/1) -> 1000.00 (1000/1)
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video-2012-04-26-19-48-40.mp4':
    
  Metadata:
    
    major_brand     : 3gp4
    
    minor_version   : 768
    
    compatible_brands: 3gp43gp6
    
  Duration: 00:00:09.55, start: 0.000000, bitrate: 3366 kb/s
    
    Stream #0.0(eng): Video: h264, yuv420p, 720x480, 3304 kb/s, 29.61 fps, 1k tbr, 30k tbn, 60k tbc
    
    Stream #0.1(eng): Audio: aac, 16000 Hz, mono, s16, 56 kb/s
    
WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s
    
Output #0, flv, to 'pipe:1':
    
  Metadata:
    
    encoder         : Lavf52.64.2
    
    Stream #0.0(eng): Video: flv, yuv420p, 720x480, q=2-31, 200 kb/s, 1k tbn, 1k tbc
    
    Stream #0.1(eng): Audio: adpcm_swf, 44100 Hz, mono, s16, 0 kb/s
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
  Stream #0.1 -> #0.1
    
Press [q] to stop encoding
    
frame=  283 fps=175 q=31.0 Lsize=     924kB time=9.52 bitrate= 794.7kbits/s    
    
video:709kB audio:207kB global headers:0kB muxing overhead 0.867656%

    But when I read the input also from pipe, I get an error :

    Command :

    $cat video-2012-04-26-19-48-40.mp4| ffmpeg -i pipe: -ar 44100 -ab 96 -f flv pipe:1 | cat> videoname.flv

    Error output :

    FFmpeg version 0.6-4:0.6-2ubuntu6.3, Copyright (c) 2000-2010 the FFmpeg developers
    
  built on Dec 21 2011 18:37:43 with gcc 4.4.5
    
  configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
    
  WARNING: library configuration mismatch
    
  libavutil   configuration: --extra-version=4:0.6-2ubuntu3.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavcodec  configuration: --extra-version=4:0.6-2ubuntu3.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavformat configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavdevice configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavfilter configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libswscale  configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libpostproc configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavutil     50.15. 1 / 50.15. 1
    
  libavcodec    52.72. 2 / 52.72. 2
    
  libavformat   52.64. 2 / 52.64. 2
    
  libavdevice   52. 2. 0 / 52. 2. 0
    
  libavfilter    1.19. 0 /  1.19. 0
    
  libswscale     0.11. 0 /  0.11. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8962bc0]stream 0, offset 0x28: partial file
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8962bc0]Could not find codec parameters (Video: h264, 3304 kb/s)
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8962bc0]Could not find codec parameters (Audio: aac, mono, s16, 56 kb/s)
    
pipe:: could not find codec parameters

    Please help me fix the error.

  • How can I create a write stream for res for a child_process.spawn method as it says cp.spawn().pipe(res) is not a method

    11 juin 2022, par niishaaant
    const express = require('express');
const router = express.Router();
const ytdl = require('ytdl-core');
const cp = require('child_process');
const ffmpeg = require('ffmpeg-static');

router.get('/', async (req, res) => {
    const { v, f, q } = req.query;
    if (!ytdl.validateID(v) && !ytdl.validateURL(v)) {
        return res
            .status(400)
            .json({ success: false, error: 'No valid YouTube Id!' });
    }
    try {
        let info = await ytdl.getInfo(v);

        //set format and title
        // const title = info.videoDetails.title;
        // res.setHeader('Content-disposition', contentDisposition(`${title}${f}`));

        //define audio and video stream seperately and download them
        const audio = ytdl(v, { quality: 'highestaudio' }).on(
            'progress',
            (_, downloaded, total) => {
                console.log({ downloaded, total });
            }
        );
        let format = ytdl.chooseFormat(info.formats, { quality: q });
        const video = ytdl(v, { format }).on('progress', (_, downloaded, total) => {
            console.log({ downloaded, total });
        });

        const ffmpegProcess = cp
            .spawn(
                ffmpeg,
                [
                    // Remove ffmpeg's console spamming
                    '-loglevel',
                    '8',
                    '-hide_banner',
                    // Redirect/Enable progress messages
                    '-progress',
                    'pipe:3',
                    // Set inputs
                    '-i',
                    'pipe:4',
                    '-i',
                    'pipe:5',
                    // Map audio & video from streams
                    '-map',
                    '0:a',
                    '-map',
                    '1:v',
                    // Keep encoding
                    '-c:v',
                    'copy',
                    // Define output file
                    `out.${f}`,
                ],
                {
                    windowsHide: true,
                    stdio: [
                        /* Standard: stdin, stdout, stderr */
                        'inherit',
                        'inherit',
                        'inherit',
                        /* Custom: pipe:3, pipe:4, pipe:5 */
                        'pipe',
                        'pipe',
                        'pipe',
                    ],
                }
            )
            .on('close', () => {
                console.log('done');
            });

        // Link streams
        // FFmpeg creates the transformer streams and we just have to insert / read data
        ffmpegProcess.stdio[3].on('data', (chunk) => {
            // Parse the param=value list returned by ffmpeg
            const lines = chunk.toString().trim().split('\n');
            const args = {};
            for (const l of lines) {
                const [key, value] = l.split('=');
                args[key.trim()] = value.trim();
            }
        });
        audio.pipe(ffmpegProcess.stdio[4]);
        video.pipe(ffmpegProcess.stdio[5]);
    } catch (error) {
        res.status(400);
        console.log('error ', error);
    }
});

module.exports = router;


    


    


    I am trying to create a youtube downloader app and this is the code for downloading a video using the ytdl and ffmpeg packages in an express route but i don't know how i can download the result (out.mp4) for the client. when I try to pipe it to res error occurs saying cp.spawn().pipe() is not a method.

    


    


  • How to optimize FFMPEG with pipe and memory reuse in Tide SDK

    7 janvier 2014, par Vincent Duprez

    Im running into an speed optimization issue. Im building a video cut tool in web technologies on desktop with TideSDK. On of the tools has a timeline with a position slider

    basically, whenever the slider moves, (using jquery UI), I get the position, translate this into a timecode and asks FFMPEG to encode to a file, when a get the finished event, I simply update the background-image attribute of the 'viewer' to this file. The file is located in some temporary folder.

    The thing is, it is just a bit too slow. Usable, but slow (approx 2 fps on a High end Computer)
    I think there are 2 bottlenecks on this strategy :
    - Writing ffmpeg output to a file & reading back in css
    - repeatedly loading the same movie file in ffmpeg

    This is the code executed on each move (var timecode is the calculated timecode based on the pointer position)

    var cmd = [FFMPEG];
    
cmd.push('-y'); //overwrite existing files
    
cmd.push('-ss',timecode); //CUE position
    
cmd.push('-i',input); //input file
    
cmd.push('-f','image2'); //output format
    
cmd.push('-vframes','1'); //number of images to render
    
cmd.push(Ti.API.Application.getDataPath( )+"/encoderframe.jpg"); //output file
    

    
var makeframe = Ti.Process.createProcess(cmd);
    
makeframe.setOnReadLine(function(data){ /*console.log(data);*/ });
    
var time = new Date().getTime();
    
makeframe.setOnExit(function(){ ffmpegrunning = false;  $('#videoframe').css('background-image','url(file://'+Ti.API.Application.getDataPath( ).replace(" ","%20")+'/encoderframe.jpg?'+time+')');     });
    
makeframe.launch();

    Basically, this repeatedly asks the same Command :

    ffmpeg -y -ss 00:00:01.04 -i /somepath/somevideo.mov -f image2 -vframes 1 /path/to/output/encoderframe204.jpg

    How can I optimize this code, Pipe to output straight to css background with Base64 data, or reuse loaded memory file in ffmpeg. ?

    Thanks !

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