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  • How to combine multiple video blobs in js without gap ?

    5 septembre 2021, par Pouria Moosavi

    I have an array of urls. I download them with fetch and then get blob from each response with await res.blob(). I need to concat all these blobs together to make a full video out of it, I tried to push each blob into an array and make a file new File(blobArray, "test") but the result has a gap between each blob.

    


    I've tried to save each blob as a separate file and concat them with ffmpeg -f concat -safe 0 -i text -c copy out3.mp4 and the result was perfect. So I know that my blobs are correct and the problem is how I am combining them together.

    


    This is my full code :

    


    (async function() {
  var urlString = `
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18160.ts?Expires=1630841672&Signature=C-DrIcvmIGkm0s42EQRPWh6Y-aEWvnl2xu1LOIWyzgQqOe-~6E9rLtpR5Kdfz8lNdNXVFz2XyrsgSX1Dn8AUbxUM6umqxALPn57sdSUoVf5-JQce472EHX-roQTsy3SAM~IIXH3B6FHcpdce~1vdqTze~nQY2F3wbzCPyspJSEPU74~-TySj8PhHrFtYNFIsFVr4R-Pc4FF-EWy2zXzo0Av59-4VlOXqFYhmQwcm~kimWNXJpOYhghv6pVbFYzyp7x9tYLiX1~9hbTG3otmoBAJGRt7EUlZiBZhprAgMzhrPS2TezenBKXNf0qJEp-fnC5so0OykRt-TGhyRapbJoA__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18161.ts?Expires=1630841672&Signature=bBVrS4brV209hRADZgPnYQICBcXWe6Ed6zwBOFdozjIR1tiuahx3YmPhM8uaxLNRqowALgylen1wQBmdK5bGm~73DQUcUUfGXQU8kIv45CW1DyHDzX-ECR3MDpzSzIYDI8ELbFXK8gmT7ELgtmdkSrL0XO0FXCVAzLrzSw6-0XAZgzBY7tZUncRum5Wb7EhYQgluO2uCquz6HZqaVA9IYoCeFWKFXvU3xE-RBqHXksWkZO01o3UNEEgnzYrRepurcdYY029~6MsHEyj5304pDlefXKrEj8mbZidvhaUKkiIjcoG15jznWPvN3WAewK3zXpLlCYhBMuDL0kOVIq5zjA__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18162.ts?Expires=1630841672&Signature=a3lUizMPzmtntrapM9qLk0f~GrfnQAFNlEJEzrvFowGMZVMukqPVfloM7Z9J33ZThK7mKfRy7tiYH1KDzCT5hpRl0X-pcCvcmAmy4u8h1upKO0RJmaP1v7PVzqACPTyvDHNDy3Fh-pxhpO1ubKR2SR7gq1n1K6tX8sbogNHmo0jPnERRxtLKF618nAuGBPQVYofkNG0zvcomGRX7iN95ovn8Ql9IxmqsGLGI2HzlJq3v8L4iS6UYUpV4yhAtZxmbERACq82JcwdiMMlLlnn~SoenYttzDrTdSh-u321KqjAoD6lij6l~j-dReVWY4HTDlsCnGaw9w-eOIuEywi8DpA__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18163.ts?Expires=1630841672&Signature=Q6eYIsoPFVKYjY0vVDcnMKKI3oV14xnfDLpvJdH7Z9GoNqojPRXOyITTmd6Ed1JCxmF9oAkfvdghH0Ks1-fSYL3tvu5kMuJe2sWbeKCimqHQ89JvhJ3hOfVvUBIv-QVdbGYXD9FOr8T5s~HYC5KkDrFqRorDidH04y67P175sBXMtYIwt04KzG7m17X8kbJkjsjuVhD0sZ0ewACz1OBPnxO9qLdvGsRqVtW1FmuKSnDULieqdsQGfuH1YkkVCr7H4t0B5SF77vvxYkvcr4uGRjKMPVdggg3BYQKCWHn~pEEP2~P6oJZdfwbu9wnKJnIvimXVleHYW-hPk0OWBD5JAg__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18164.ts?Expires=1630841672&Signature=HItA9pW3RiIhf9pFFGm4Y8FmikCPXBfh8gxJVNSLsJ9cuDONLX3n26ZjYO2NaROwsID9YjxwlDuS9jqqe62A7vLPsAjVmL6WvCZ8a22tAihPBPM-qOSWoHS7E~3bSurc9CzkQwlOBvg01~Mjl-E2kvP-hn0FxhTPk1FAE8BrL6DIeGKsBqIdvVgHsJyTi9osDNPG~OtKRKRskAK37QcXidkiLjFMcbX6uqwmcVHEpP30fDj13wBMwx2suuJ27~ICmSH44CHCuRcKujISKbrVjbnsUw4ivA7a72hyybSTDhwZBzjj753FFy0LqSVWVFOJJY1HXEnZ4mpvax9N1lth2Q__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18165.ts?Expires=1630841672&Signature=L4T1BtTtHVM7p2JqvXEXLcJDUNdm8IZ8LU-oPkKxYBwuZHXEdxOLTTrFSX-3N39c7JMWDljWNi2bLrjbjK2xa1yMB5eTjvZTjusJDPk91RW0cMB4qsTpuXR1ui~ybPe5ABoV6N4cUXj~bUQFfUURo66kH5UdC~SIKMzQx59mnATvKZfZwOizm2kEuc8qaXPi9yJmYdPGhr6qSN1~kl0NEWciOU3o-etMtFc29yrlGl~Fgj0bvCyAwLwtR4yQwKFHCJWZPiMfJky9GJB4LKcyKBFu7bkDjk2BzOveJklvIPF~tZKkd3ki~I5kfYhTL-~hEDT4i9hIfHJEF1JF1rf~bw__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18166.ts?Expires=1630841672&Signature=Kzf38iYJwebZG2nzkrPSVEvqWxSc959XcvUqiMhZC1lFwZefNTMw1a5EHcUfObujy~3XQ3Yxm-Ls8CziLLvO3Vi8wEg05GB1COnFT1hxasQHID1tmMaXrKrRBZp2XZApehhOpSroJdx46Zb8qlM4JMu3lf30eBIHsbPOIsdmW1o2E9USZUMUKiG-T3feO1kjT3scDsoKcaX2cQrqE8c1oAuEy57eASgFKQcy0OGtrxDujPHLNWYmRv~CFZxHf8LCuMKBrL9OtXE7py0g9x4d4BvwzQ5XOoQ5d5JsfnT8EeH5Lqbh8crtauJb5BrUk6j9uV1MWviZi7WQzGcds6eItg__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18167.ts?Expires=1630841672&Signature=Vc5mVh~J-WEG2eHhiXnsNFBI~kpCtTnwwgiihaP6Fvm1IeA7eJ0QzA5g2Tq1VADLI-B2Bl1Ss~CmSyyXQEiM~IxRVjiNs1~PpnIKm0gFD0iBgIZOS3GoS6bx4bkRiy1tEMn98~~1VGqZ4FxJxc59QOdjmwvAvUvGN01zojOHt0i61XDqjeLz~wFUR9MVh~QYskV4w5sR~THYpKqiMej6JAIVz3avhadVlE1p0P9Gel7LLo59WjFx3Da1huQzBNQ2B8l3-pQpepwbiI0vsrN09aZHLnVtu1NPeEbpG5lZMIhYLay5qQTg1d87ouDoZ8zWYl0buPu5ZL06DiBFIDDhrA__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18168.ts?Expires=1630841672&Signature=QsdnxTFnRVml4yq~cbIMRDdESRoX6KH2AkCCm5J-MqW3QEr9RQU5Y7v41nKxIo~IgwI9FMoTRSk61whNyrLePlw2GXq38iK6UhlmpMkJYF3Tvj84GDckbpdqrIQLlZRJPngjx9n2eE3R8Sb7igXwIrr5dymYjEh2Hb0jkYs0~9Zfzr-pJAGoEdUr36hkGP2UXP4n~atb1cDW1hDbd8YJeUNYfKfTSPwq5~E9Te9P674pL2D~WutSM-Gk9xXMhVX7Z0VJWKQh5JWzSkrzDTc9rjTnotWJ7~kU1HqapqD2eVr3DOwI2b19Yv7FGWD3wrxtLA9A8AhkEbpaHLcuYyIS9w__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e18169.ts?Expires=1630841672&Signature=e-uHBmY7DMqAkrpRbtfyiRlglUU9wwLY5d2Oar44~xgQerrV~5dAa7q~Nf3V2WNyi22Bg88f4bvjYMIPMjghT4aZol7JXv1Q7VH~1xjydJfaIEXunOZzqswi4PbljlXui7W0c2c59hj~6c96bc6Iyr79x3bvylA1nnxJo2Y6a1Zus0irS7u-45BjXym27NtXrhOwpcVc2GNXhI74yqjXA-vFr1XVuHBHMQVMLTryYlStwoAUXnn7K~U88skq0ursQqpDFCmlDkgoXED~rdm7THJht9wOhkFbf2T79xsENBhPoiS56DLT7qIemBFGDUxHVeoTgZdMLXE2SVsgp-LBmQ__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e181610.ts?Expires=1630841672&Signature=KFxUkMZhteXsl3mSobA5Xg5~PQIztGtmgd~E1g2peja~oHMPNUWE6ihhcOEkO1M6CKXDycegq9~8xv6GqWSrRz5xntTYXNWyRT2-C0W2E79E0Fd1QLndb1~UP1uq~6z-8FbxXLIhHgCzSgaVtPxt8vFqQ1TI-Zd0j0ramKvfWu4iZiZTxEWn5d5Iaaf-LqTdgXWUKqWsr6F0czH7FZh6sI4NVmUAOOD1-sez5ALVr8GBruihB23W5E2yOWtk31KTC-M7TVf1AjwQTJurm~rWka4~~c2lCJ~~o-n~N5p38KdaReZWk2yCqHRYt7pdwpyqIAhosvsVs8Kf5AT2mQV-tQ__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e181611.ts?Expires=1630841672&Signature=AZuneobcwantsOflRrRO4DJzmW0JzqOcDDrB8YKIh~YbL5AuhlZV2OyN6fgUJ0~EVAqRk4h2RpUmZiD4ov8muNu3U-SHp1ksHia3d8cct7Ns485ta87Lb6GqX9yvF3qTNCTT3f5FSQeoKPmGXWPpbzUsdC7TGxNVy8M5IcdqHeoJDrOUeYOqnyQtNDrhWzFsp14YL4RqWBoiz0llpN6w-8QfaeWzCYkT~KxM0UKlPFDzeijXcNJS-tjCxUrT9CnYZ3IfMDvufDCfztd20x37rK1xSln~fuF4PLsMdrfpayY1lSPMgmLP9-~k7SiYth4qSU4CsdgY~1HTZJpUHg2AXQ__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
https://hls-c.udemycdn.com/2020-06-25_14-12-40-d54947f66bb66a48d9c119adf45739ad/1/hls/AVC_1920x1080_800k_AAC-HE_64k/aa0003ab30f349f2a87b8a745d2b648e181612.ts?Expires=1630841672&Signature=Dcl1pJwVlfyN-Lqlq8RruR4t4c3l6Y~hSXPdZyLcspdg16gH-Jk78buQCD2LEniYF6xgXRVRgdLQj26lxiHJi2LiHXHV8~jKQVVrU2lnga9p48M35KdJZheJ~N6f91hsTpHEhYBBSR0TYhRcTMrh1WXstOMW5kHA01nVzq3mOpnHlDFpcHNuTslTAAouqeMXsdY6H4ta15puQcVnvqchOr-7c5dU4ZG14FtHF2WvjnMEWARWDvivOvoqQAqwPQgHm5SxJFw~qyZmIeRUG-TT9i-RXIAzSivg6vKiP2A-AomTOwGW3oFRXKLdMXSMlcd6lmQ7~b7jTi7uNX4Bhup-jQ__&Key-Pair-Id=APKAITJV77WS5ZT7262A,
`

  const urlArr = urlString.split(",")
  let blobArr = [];
  for(let url of urlArr) {
    if(url) {
      try{
        const res = await fetch(url);
        const blob = await res.blob();
        blobArr.push(blob)
      } catch (err) {
        console.log(err)
      }
    }
  }

  const newBlob = new Blob(blobArr)
  const finalFile = new File([newBlob], "test-udemy");
  const a = document.createElement("a")
  const url = URL.createObjectURL(finalFile);
  a.href = url;
  a.download = "test-udemy";
  document.body.appendChild(a);
  a.click();
  setTimeout(function() {
      document.body.removeChild(a);
      window.URL.revokeObjectURL(url);  
  }, 0); 
})()


    


    Unfortunately links will expire soon but I think it is obvious what I am trying to do.

    


    So Is there any way to cancat blobs in JS and create the entire video smoothly like the ffmpeg does ?

    


    Thanks in advance.

    


  • node.js ffmpeg spawn child_process unexpected data output and not possible to kill or stop

    1er septembre 2021, par PLNR

    
I'm rather new to backend stuff, so please excuse, if my question is trivial.
    
For an Intranet project, I want to present a video element in a webpage (React, HLS.js Player) with the possibility reload the stream in case it hung.
    
The video sources are mpeg-ts streams delivered as udp multicast.
    
A small node.js / express server should handle the ffmpeg commands, to transcode the multicast to hls to display them in a browser.
    

    
My Problem is, that I am unable to stop the process...
    
I've tried to SIGINT, SIGTERM the process with it's pid, but the encoding is just going on.

    


    Here is the code I wrote for transcoding so far :

    


    const express = require("express");
const { spawn, exec } = require("child_process");
const cors = require("cors");
const process = require("process")

let ls;
let pid;

const app = express();

app.use(cors());

app.get('/cam/:source', (body) => {
    const cam = body.params.source;
    console.log(cam);

    let source = "udp://239.1.1.1:4444";
    let stream = "/var/www/html/streams/tmp/cam1.m3u8"


    stream = spawn("ffmpeg", ["-re", "-i", source, "-c:v", "libx264", "-crf", "21", "-preset", "veryfast", "-c:a", "aac", "-b:a", "128k", "-ac", "2", "-f", "hls", "-hls_list_size", "5", "-hls_flags", "delete_segments", stream], {detached: true});

    pid = stream.pid;

    stream.stdout.on("data", data => {
        console.log(`stdout: ${data}`);
    });

    stream.stderr.on("data", data => {
        console.log(`stderr: ${data}`);
        console.log("pid: ", pid);
    });

    stream.on("error", error => {
        console.log(`error: ${error.message}`);
    });

    stream.on("close", code => {
        console.log(`child process exited with code ${code}`);
    });
})

app.get('/cam/quit', () => {
    process.kill(pid, 'SIGINT')
})

app.listen(5000, ()=> {
    console.log('Listening');
})


    


    On requesting the /cam/quit i would expect the process to stop... but it doesn't.
    
I've tried :

    


    app.get('/cam/quit', () => {
    process.kill(pid, 'SIGINT')
})


    


    app.get('/cam/quit', () => {
    process.kill(stream.pid, 'SIGINT')
})


    


    app.get('/cam/quit', () => {
    stream.kill(pid, 'SIGINT')
})


    


    app.get('/cam/quit', () => {
    stream.kill(0, 'SIGINT')
})


    


    But none of this worked... do I miss something ? Is there something I need to change ?

    


    Problem 2 - Output :
    
The output is emitted on stderr... even the process is working as expected.
    
This is maybe only cosmetics, but it makes me wondering.
    
Here is the terminal output :

    


    [nodemon] starting `node server.js`
Listening
camera stream reloaded
stderr: ffmpeg version 4.3.2-0+deb11u1ubuntu1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10 (Ubuntu 10.2.1-20ubuntu1)
  configuration: --prefix=/usr --extra-version=0+deb11u1ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --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-librsvg --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-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  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
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100

pid:  4206
stderr: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'udp://239.1.1.1':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 
pid:  4206
stderr: 1970-01-01T00:00:00.000000Z
    encoder         : Lavf52.54.0
  Duration: 01:55:59.20, start: 0.000000, bitrate: 1436 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 720x384 [SAR 1:1 DAR 15:8], 1272 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 159 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : SoundHandler

pid:  4206
stderr: Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help

pid:  4206
stderr: [libx264 @ 0x5616b38b5440] using SAR=1/1

pid:  4206
stderr: [libx264 @ 0x5616b38b5440] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2

pid:  4206
stderr: [libx264 @ 0x5616b38b5440] profile High, level 3.0, 4:2:0, 8-bit

pid:  4206
stderr: [libx264 @ 0x5616b38b5440] 264 - core 160 r3011 cde9a93 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=21.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, hls, to '/var/www/html/streams/tmp/aft.m3u8':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0(und): Video: h264 (libx264), yuv420p, 720x384 [SAR 1:1 DAR 15:8], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : VideoHandler
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    Stream #0:1(und): Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : SoundHandler
      encoder         : Lavc58.91.100 aac

pid:  4206
stderr: frame=    8 fps=0.0 q=0.0 size=N/A time=00:00:00.46 bitrate=N/A speed=0.931x    
pid:  4206
stderr: frame=   21 fps= 21 q=26.0 size=N/A time=00:00:00.96 bitrate=N/A speed=0.95x    
pid:  4206
stderr: frame=   33 fps= 22 q=26.0 size=N/A time=00:00:01.49 bitrate=N/A speed=0.982x    
pid:  4206
stderr: frame=   46 fps= 23 q=26.0 size=N/A time=00:00:02.00 bitrate=N/A speed=0.989x    
pid:  4206
stderr: frame=   58 fps= 23 q=26.0 size=N/A time=00:00:02.49 bitrate=N/A speed=0.986x    
pid:  4206


    


    and so on...
    

    
Any help would be highly appreciated !
    
Many thanks in advance

    


  • Why is the filesize different when swapping audio tracks using ffmeg ?

    20 août 2021, par Brian

    I have a movie that I have encoded using Handbrake on a Mac a long time ago. When I encoded the movie, I put the stereo audio as track 1 and the 5.1 audio as track 2. The starting filesize is 853,320,914 bytes. Below is the data from ffprobe.

    


    ffprobe version 4.2.1-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2007-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Annabelle - Comes Home (2019).m4v':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 2020-04-06T22:40:36.000000Z
    encoder         : HandBrake 1.1.2 2018090500
  Duration: 01:46:04.86, start: 0.000000, bitrate: 1072 kb/s
    Chapter #0:0: start 0.000000, end 476.986000
    Metadata:
      title           : Chapter 1
    Chapter #0:1: start 476.986000, end 933.608000
    Metadata:
      title           : Chapter 2
    Chapter #0:2: start 933.608000, end 1441.449000
    Metadata:
      title           : Chapter 3
    Chapter #0:3: start 1441.449000, end 1976.358000
    Metadata:
      title           : Chapter 4
    Chapter #0:4: start 1976.358000, end 2579.753000
    Metadata:
      title           : Chapter 5
    Chapter #0:5: start 2579.753000, end 3149.030000
    Metadata:
      title           : Chapter 6
    Chapter #0:6: start 3149.030000, end 3726.941000
    Metadata:
      title           : Chapter 7
    Chapter #0:7: start 3726.941000, end 3973.520000
    Metadata:
      title           : Chapter 8
    Chapter #0:8: start 3973.520000, end 4504.676000
    Metadata:
      title           : Chapter 9
    Chapter #0:9: start 4504.676000, end 4904.409000
    Metadata:
      title           : Chapter 10
    Chapter #0:10: start 4904.409000, end 5421.592000
    Metadata:
      title           : Chapter 11
    Chapter #0:11: start 5421.592000, end 5998.001000
    Metadata:
      title           : Chapter 12
    Chapter #0:12: start 5998.001000, end 6364.075000
    Metadata:
      title           : Chapter 13
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s (default)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : Stereo
    Stream #0:2(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : Surround
    Side data:
      audio service type: main
    Stream #0:3(eng): Data: bin_data (text / 0x74786574)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : SubtitleHandler
Unsupported codec with id 100359 for input stream 3


    


    My goal is to swap the stereo audio track with the 5.1 audio track and make the 5.1 audio track the default without having to reencode. To do this, I used the following command :

    


    ffmpeg -i "Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019)_old.m4v" -map 0:v:0 -map 0:a:1 -map 0:a:0 -disposition:a:0 default -disposition:a:1 none -c copy "Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019).m4v"

    


    Everything works as it should, I think anyways as I didn't get any errors...

    


    ffmpeg version 4.2.1-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019)_old.m4v':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 2020-04-06T22:40:36.000000Z
    encoder         : HandBrake 1.1.2 2018090500
  Duration: 01:46:04.86, start: 0.000000, bitrate: 1072 kb/s
    Chapter #0:0: start 0.000000, end 476.986000
    Metadata:
      title           : Chapter 1
    Chapter #0:1: start 476.986000, end 933.608000
    Metadata:
      title           : Chapter 2
    Chapter #0:2: start 933.608000, end 1441.449000
    Metadata:
      title           : Chapter 3
    Chapter #0:3: start 1441.449000, end 1976.358000
    Metadata:
      title           : Chapter 4
    Chapter #0:4: start 1976.358000, end 2579.753000
    Metadata:
      title           : Chapter 5
    Chapter #0:5: start 2579.753000, end 3149.030000
    Metadata:
      title           : Chapter 6
    Chapter #0:6: start 3149.030000, end 3726.941000
    Metadata:
      title           : Chapter 7
    Chapter #0:7: start 3726.941000, end 3973.520000
    Metadata:
      title           : Chapter 8
    Chapter #0:8: start 3973.520000, end 4504.676000
    Metadata:
      title           : Chapter 9
    Chapter #0:9: start 4504.676000, end 4904.409000
    Metadata:
      title           : Chapter 10
    Chapter #0:10: start 4904.409000, end 5421.592000
    Metadata:
      title           : Chapter 11
    Chapter #0:11: start 5421.592000, end 5998.001000
    Metadata:
      title           : Chapter 12
    Chapter #0:12: start 5998.001000, end 6364.075000
    Metadata:
      title           : Chapter 13
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s (default)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : Stereo
    Stream #0:2(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : Surround
    Side data:
      audio service type: main
    Stream #0:3(eng): Data: bin_data (text / 0x74786574)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : SubtitleHandler
[ipod @ 0x7faff0014000] track 1: codec frame size is not set
Output #0, ipod, to 'Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019).m4v':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Chapter #0:0: start 0.000000, end 476.986000
    Metadata:
      title           : Chapter 1
    Chapter #0:1: start 476.986000, end 933.608000
    Metadata:
      title           : Chapter 2
    Chapter #0:2: start 933.608000, end 1441.449000
    Metadata:
      title           : Chapter 3
    Chapter #0:3: start 1441.449000, end 1976.358000
    Metadata:
      title           : Chapter 4
    Chapter #0:4: start 1976.358000, end 2579.753000
    Metadata:
      title           : Chapter 5
    Chapter #0:5: start 2579.753000, end 3149.030000
    Metadata:
      title           : Chapter 6
    Chapter #0:6: start 3149.030000, end 3726.941000
    Metadata:
      title           : Chapter 7
    Chapter #0:7: start 3726.941000, end 3973.520000
    Metadata:
      title           : Chapter 8
    Chapter #0:8: start 3973.520000, end 4504.676000
    Metadata:
      title           : Chapter 9
    Chapter #0:9: start 4504.676000, end 4904.409000
    Metadata:
      title           : Chapter 10
    Chapter #0:10: start 4904.409000, end 5421.592000
    Metadata:
      title           : Chapter 11
    Chapter #0:11: start 5421.592000, end 5998.001000
    Metadata:
      title           : Chapter 12
    Chapter #0:12: start 5998.001000, end 6364.075000
    Metadata:
      title           : Chapter 13
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], q=2-31, 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 90k tbc (default)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : Surround
    Side data:
      audio service type: main
    Stream #0:2(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s
    Metadata:
      creation_time   : 2020-04-06T22:40:36.000000Z
      handler_name    : Stereo
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:2 -> #0:1 (copy)
  Stream #0:1 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame=152602 fps=12872 q=-1.0 Lsize=  834270kB time=01:46:04.79 bitrate=1073.8kbits/s speed= 537x    
video:403702kB audio:424714kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.706676%


    


    Here is the resulting ffprobe of the new file showing it swapped the audio tracks :

    


    ffprobe version 4.2.1-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2007-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Annabelle - Comes Home (2019).m4v':
  Metadata:
    major_brand     : M4V 
    minor_version   : 512
    compatible_brands: isomiso2avc1
    encoder         : Lavf58.29.100
  Duration: 01:46:04.86, start: 0.000000, bitrate: 1073 kb/s
    Chapter #0:0: start 0.000000, end 476.986000
    Metadata:
      title           : Chapter 1
    Chapter #0:1: start 476.986000, end 933.608000
    Metadata:
      title           : Chapter 2
    Chapter #0:2: start 933.608000, end 1441.449000
    Metadata:
      title           : Chapter 3
    Chapter #0:3: start 1441.449000, end 1976.358000
    Metadata:
      title           : Chapter 4
    Chapter #0:4: start 1976.358000, end 2579.753000
    Metadata:
      title           : Chapter 5
    Chapter #0:5: start 2579.753000, end 3149.030000
    Metadata:
      title           : Chapter 6
    Chapter #0:6: start 3149.030000, end 3726.941000
    Metadata:
      title           : Chapter 7
    Chapter #0:7: start 3726.941000, end 3973.520000
    Metadata:
      title           : Chapter 8
    Chapter #0:8: start 3973.520000, end 4504.676000
    Metadata:
      title           : Chapter 9
    Chapter #0:9: start 4504.676000, end 4904.409000
    Metadata:
      title           : Chapter 10
    Chapter #0:10: start 4904.409000, end 5421.592000
    Metadata:
      title           : Chapter 11
    Chapter #0:11: start 5421.592000, end 5998.001000
    Metadata:
      title           : Chapter 12
    Chapter #0:12: start 5998.001000, end 6364.075000
    Metadata:
      title           : Chapter 13
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Metadata:
      handler_name    : Surround
    Side data:
      audio service type: main
    Stream #0:2(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s
    Metadata:
      handler_name    : Stereo
    Stream #0:3(eng): Data: bin_data (text / 0x74786574)
    Metadata:
      handler_name    : SubtitleHandler
Unsupported codec with id 100359 for input stream 3


    


    What I don't understand is why is the file size different ? The resulting file is larger at 854,292,790 bytes. Shouldn't the file sizes be the same since I literally just swapped tracks 0 and 1 ?

    


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