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• ffmpeg chains parameters and options while being used in a loop

  10 janvier 2024, par Simon Nazarenko

  I got a code that generates videos from scratch (got gifs, captions and audio). It works amazing when done once, however, when put in a loop and it should create more than 1 video it freezes being caused by memory leak. Upon investigation I realized that ffmpeg (v1.1.0) chains the loop iterations carrying the parameters and options from the first iteration to the second. It then breaks (overwrites) the first video and infinitely writes the second.

  


  This is my dependency

  


  const ffmpeg = require("fluent-ffmpeg")()
  .setFfprobePath(ffprobe.path)
  .setFfmpegPath(ffmpegInstaller.path)


  


  It looks like this

  


  async function convertGifToVideo(
  gifFile,
  audioFile,
  subtitlesFile,
  tempDirectory
) {
  return new Promise((resolve, reject) => {
    const outputFile = `${tempDirectory}/video_${Date.now()}.mp4`
    
    ffmpeg
      .input(gifFile)
      .inputFormat("gif")
      .inputOptions("-stream_loop -1")
      .input(audioFile)
      .outputOptions("-shortest")
      .outputOptions(`-vf subtitles=${subtitlesFile}`)
      .outputOptions("-report")
      .output(outputFile)
      .on("end", () => {
        console.log(`Combined ${gifFile} and ${audioFile} into ${outputFile}`)
        resolve(outputFile)
      })
      .on("error", (err, stdout, stderr) => {
        console.error("Error combining GIF and audio:", err)
        console.error("ffmpeg stdout:", stdout)
        console.error("ffmpeg stderr:", stderr)
        reject(err)
      })
      .run()
  })
}


  


  And it's called in a loop

  


  for (const key in script) {
    if (script.hasOwnProperty(key)) {
      ...stuff

      const videoFileName = await convertGifToVideo(
        gifFileName,
        audioFileName,
        subtitlesFileName,
        tempDirectory
      )
    }
  }


  


  Here is a piece of log from the first video generation

  


  


  ffmpeg started on 2024-01-10 at 02:58:52
Report written to "ffmpeg-20240110-025852.log"
Command line :
/home/simon/Documents/AFYTUBE/node_modules/@ffmpeg-installer/linux-x64/ffmpeg -f gif -stream_loop -1 -i ./temp/gif_funny_frogs.gif -i ./temp/funny_frogs.mp3 -y -shortest -vf "subtitles=./temp/funny_frogs.srt" -report ./temp/video_1704880732780.mp4

  


  


  Here is a piece of log from the second one

  


  


  /home/simon/Documents/AFYTUBE/node_modules/@ffmpeg-installer/linux-x64/ffmpeg -f gif -stream_loop -1 -i ./temp/gif_funny_frogs.gif -i ./temp/funny_frogs.mp3 -f gif -stream_loop -1 -i ./temp/gif_leg_exercises.gif -i ./temp/leg_exercises.mp3 -y -shortest -vf "subtitles=./temp/funny_frogs.srt" -report -shortest -vf "subtitles=./temp/leg_exercises.srt" -report ./temp/video_1704880732780.mp4 ./temp/video_1704880750879.mp4

  


  


  Any ideas what I am doing wrong ?

  


• FFMPEG - copy the SPECIFED tracks only, ignore all others

  10 janvier 2024, par GDP

  I have some very strange MP4 files that we get regularly for processing created by Wowza. Neither FFMPEG or MEDIAINFO can detect that there are subtitles soft-coded in them, but they ARE there, I can extract them with ccextractor, and when they're played, the captions appear later in the video where the actually start in the timeline.

  


  I've tried every variation of copying with/without re-encoding, but all the answers show how to "omit" the subtitles with -sn such as these :

  


   ffmpeg -i 3078.mp4 -c copy -sn 3078_sn.mp4
 ffmpeg -i 3078.mp4 -c:v libx264 -c:a ac3 -map 0:v:0 -map 0:a:1 3078_sn.mp4
 ffmpeg -i 3078.mp4 -map 0:v:0 -map 0:a:0  -map -0:s -map -0:d  -c copy 3078_sn2.mp4 -y


  


  FFprobe :

  


  ffprobe 3078.mp4 -hide_banner
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001ef2bcd9e00] multiple fourcc not supported
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '3078.mp4':
  Metadata:
    major_brand     : f4v
    minor_version   : 0
    compatible_brands: isommp42m4v
    creation_time   : 2024-01-09T19:59:28.000000Z
  Duration: 02:17:18.47, start: 0.000000, bitrate: 2165 kb/s
  Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 1902 kb/s, 29.96 fps, 29.97 tbr, 90k tbn (default)
    Metadata:
     creation_time   : 2024-01-09T19:59:28.000000Z
     handler_name    : WowzaStreamingEngine
     vendor_id       : [0][0][0][0]
     encoder         : WowzaStreamingEngine
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 257 kb/s (default)
    Metadata:
     creation_time   : 2024-01-09T19:59:28.000000Z
     handler_name    : WowzaStreamingEngine
     vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](eng): Data: none (amf0 / 0x30666D61), 1 kb/s (default)
    Metadata:
     creation_time   : 2024-01-09T19:59:28.000000Z
     handler_name    : WowzaStreamingEngine
Unsupported codec with id 0 for input stream 2


  


  The problem seems to be that FFMPEG isn't detecting they're there, and so copies them anyways. My assumption is that they're not stored in the header of the MP4 properly (or however that's done), so get because they're later detect, but weren't omitted when it checked the header (pure guesswork on that).

  


  So, is there a way to copy ONLY the video, regardless of whatEVER tracks may or not be in the file, then do the same for audio, and then merge the two single-track files ?

  


• Failed to run the ffmpeg binary : The process "ffmpeg exceeded the timeout of 60 seconds

  6 janvier 2024, par Sufian The Geek

  I am using FSPOSTER wordpress plugin to share videos on instagram as a reels and story. I have installed wordpress on amazon aws ec2 t2.micro. FsPoster required FFmpeg plugin to work with the videos.

  


  Whenever I share the video, I get error after 60 seconds. There are some videos that are easily getting shared as a reel and story. I looked into the plugin code and changed every single timeout function value to 300 seconds including php.ini file. There are some libraries like symfony in the plugin, I also changed the timeout 60 sec to 300 seconds. Restarted the server and all but still getting the error.

  


  


  Failed to run the ffmpeg binary : The process "'ffmpeg' -v error -y -i '/opt/bitnami/wordpress/wp-content/uploads/2024/01/videoWater-First-18.mp4' -vf 'crop=w=1280:h=720:x=0:y=0' -metadata:s:v rotate="" -f mp4 -c:v libx264 -preset fast -crf 24 -strict -2 -c:a aac -b:a 96k '/tmp/fs_65994ac0ddf8b.mp4'" exceeded the timeout of 60 seconds.

  


  


  I am using bitnami wordpress on ec3 aws t2.micro that has 1 vcpu and 1 GB ram. I also switched to 2 vcpu and 8 gb ram but still this timeout issue.