Recherche avancée

Sur d’autres sites (6339)

• HLS "bufferStalledError" / "bufferNudgeOnStall"

  20 avril 2022, par Yago

  I'm trying to stream videos with HLS.js, and it works perfectly fine, but when I separate the audio from the video to support multiple audio tracks, it returns these two errors at random times in the video ("bufferStalledError" and "bufferNudgeOnStall").

  


  I've tried using pure ffmpeg, I've tried using shaka packager, and I'm currently using bento4, but this error always occurs

  


  (my bento4 code)

  


  mp4hls --hls-version 4 -o "${outputFolder}" -f
[type=audio,+language=Japanese]"${inputFolder}${epFolder}/1080p.mp4"
[type=video]"${inputFolder}${epFolder}/1080p.mp4"
[type=video]"${inputFolder}${epFolder}/720p.mp4"
[type=video]"${inputFolder}${epFolder}/480p.mp4"
[type=video]"${inputFolder}${epFolder}/360p.mp4"
[type=video]"${inputFolder}${epFolder}/240p.mp4"


  


• What is the difference between "location" and "location-eng" metadata of a MP4 file ?

  10 décembre 2020, par Weihang Jian

  I am trying to retrieve GPS information from media files using ffprobe, for example :

  


  $ ffprobe -v quiet -show_format sample.mp4
[FORMAT]
filename=sample.mp4
nb_streams=2
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=4.293000
size=11888152
bit_rate=22153556
probe_score=100
TAG:major_brand=mp42
TAG:minor_version=0
TAG:compatible_brands=isommp42
TAG:creation_time=2020-09-20T11:33:49.000000Z
TAG:location=+25.0731+121.3663/
TAG:location-eng=+25.0731+121.3663/
TAG:com.android.version=10
TAG:com.android.manufacturer=Google
TAG:com.android.model=Pixel
[/FORMAT]


  


  We can see that there are 2 tags that look like ISO6709 representations, location and location-eng.

  


  And here are my questions :

  


  

  1. What is the difference between location and location-eng ? It looks like they are always the same. Why do we need 2 different keys with same the value ?

  


  2. Are location and location-eng really in ISO6709 representations ? Is there any specification or standard I can refer to ?

  


  


  I would really appreciate your help.

  


• How to check for corrupt mp3 files using ffmpeg in nodejs

  2 septembre 2022, par Oliver Wagner

  Using the 'ffmpeg-static' npm package I managed to integrate ffmpeg in my node application, and run the [example][1]https://github.com/eugeneware/ffmpeg-static/blob/dce6d42ba772a5769df8181e704772db4456ef16/example.js code.

  


  The gist of the code is :

  


  import pathToFfmpeg from "ffmpeg-static";
import shell from 'any-shell-escape';
import { exec } from "child_process";

 function runFfmpeg(src, dest) {
  //where src is a existing mp3 file in a folder and dest is the destination folder
  const script = shell([
    pathToFfmpeg,
    '-y', '-v', 'error',
    '-i', resolve(process.cwd(), src),
    '-acodec', 'mp3',
    '-format', 'mp3',
    resolve(process.cwd(), dest),
  ]);

  exec(script);
}


  


  This works and this decodes and encodes the source file into mp3 and saves it in the dest folder.

  


  However, when I try what should be the simplest ffmpeg terminal command, such as ffmpeg -i file.mp3 -hide_banner it does not work. I have tried

  


  function runFfmpeg(src, dest) {
  const script = shell([
    pathToFfmpeg,
    '-i', resolve(process.cwd(), src), '-hide_banner'
  ]);

  const fileInfo = exec(script);
  return fileInfo;



  


  In the end, where I want to get to is being able to use my runFfmpeg function to check if an mp3 file has any missing or corrupted frames, using a terminal command that I found in the interwebs :
ffmpeg -v error -i video.ext -f null

  


  Any ideas on how to do that ?