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• Using a string literal works but passing as arguments does not

  6 mai 2019, par user10204157

  I am passing string literals to my powershell script as follows :

  var spawn = require("child_process").spawn,
  
              child;
  
    child = spawn("powershell.exe", [
  
              "./scripts/ffmpeg_convert.ps1",
  
              `./cache/videos/${tempFileName + "."}${videoType}`,
  
              ` ./cache/converted_videos/${tempFileName + "."}${videoType}`
  
            ]);

  Where spawn is part of node.js Spawn

  And my powershell script is as follows :

  param(
  
      [string]$originFile = $Args[0],
  
      [string]$outputFile = $Args[1]
  
  )
  
  echo "Moving moov atom"
  
  ffmpeg -i $originFile -vcodec copy -acodec copy -movflags +faststart $outputFile

  But, the script will not execute with the argument of

  ./cache/videos/${tempFileName + "."}${videoType}

  However, if I change the argument out for the literal string let’s say
  ./cache/videos/inputVideo.mov

  it executes just fine.

  This is really making me scratch my head.

  I created two test scripts that work with the same principal... So is it just the way ${tempFileName + "."}${videoType} is being translated ? And with that being said, if I echo the arguments they are as expected.

  Script 1

   ./convert_videos.ps1 ./inputVideo.mov outputVideo.mov

  Script 2

   param(
  
      [string]$originFile = $Args[0],
  
      [string]$outputFile = $Args[1]
  
  )
  
  echo "Moving moov atom"
  
  ffmpeg -i $originFile -vcodec copy -acodec copy -movflags +faststart $outputFile

• convert metadata value to string while doing ffmpeg conversion

  16 août 2023, par Rick T

  I have a script which splits mp3 files into smaller files and incrementally numbers them. I'm now also trying to incrementally increase the -metadata title number value and -metadata track number value but ffmpeg sees everything as a string. The line I'm having issue with is.

  



  ffmpeg -i "$f" -f segment -segment_time 1200 -ar 22050 -ac 1 -metadata title="$%03d-$fn.mp3" -metadata track="$%02d" "$splitdirname/%03d-$fn.mp3" #split every 20mins


  



  If you look at the metadata title created it says $%03d-title_of_file.mp3 I'm trying to get the metatdata title to increment like 001-title_of_file.mp3, 002-title_of_file.mp3, 003-title_of_file.mp3,...

  



  The full script i'm using is below :

  



  #!/bin/bash
#run using bash mp3spl.sh
currentdir="$(pwd)" #get current directory


for f in *.mp3 # only look for mp3 files
do

#fn=`echo "$1" | cut -d'.' -f1` #get just the filename no extension
fn=$(basename "$f" | cut -d'.' -f1) #get just the filename no extension
echo "($fn)"

splitdirname="$currentdir/split-$fn" #sub directory with correct names
#echo "splitdirname $splitdirname"
mkdir -p "$splitdirname" #make split directory
#echo "Processing $f"
ffmpeg -i "$1" 2> tmp.txt

ffmpeg -i "$f" -f segment -segment_time 1200 -ar 22050 -ac 1 -metadata title="$%03d-$fn.mp3" -metadata track="$%02d" "$splitdirname/%03d-$fn.mp3" #split every 20mins

#rm tmp.txt

done


  



  Using -metadata title="$%03d-$fn.mp3" -metadata track="$%02d" does not create incremental numbers with leading zeros when used with ffmpeg.

  


• avformat/hlsenc : add var_stream_map LANGUAGE field string parameter

  23 janvier 2019, par Steven Liu

  avformat/hlsenc : add var_stream_map LANGUAGE field string parameter
  use a:0,agroup:aud_low,default:Yes,language:CHN a:1,agroup:aud_low,language:ENG
  
          a:2,agroup:aud_high,default:YesYes,language:CHN a:3,agroup:aud_high,language:ENG
  
          v:0,agroup:aud_low v:1,agroup:aud_high
  
          create master m3u8 list.
  result :
  
  EXTM3U
  
  EXT-X-VERSION:3
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_0",DEFAULT=YES,LANGUAGE="CHN",URI="out_0.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_1",DEFAULT=NO,LANGUAGE="ENG",URI="out_1.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_2",DEFAULT=YES,LANGUAGE="CHN",URI="out_2.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_3",DEFAULT=NO,LANGUAGE="ENG",URI="out_3.m3u8"
  
  EXT-X-STREAM-INF:BANDWIDTH=1170400,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_low"
  
  out_4.m3u8
  
  EXT-X-STREAM-INF:BANDWIDTH=3440800,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_high"
  
  out_5.m3u8
  Signed-off-by : Steven Liu <lq@chinaffmpeg.org>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/dashenc.c
  • [DH] libavformat/hlsenc.c
  • [DH] libavformat/hlsplaylist.c
  • [DH] libavformat/hlsplaylist.h