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• Mpeg Dash code having compilation issues and want to know what to do after the code is built and how to play the .mpd file generated

  11 avril 2013, par niuuuu

  I'm trying to build the DashEncoder code which I downloaded from github https://github.com/slederer/DASHEncoder. Well, I followed all the instructions given in the how to compile dash file. installed Gpac n X264 and compiled both successfully. Then did make of Dashencoder and ran it as ./Dashencoder. But I found some issues in it. Got this log :

  ==========DASH ENCODER===============
  
  Unknown option in resourcefile : sql-pw :
  
  current encoder x264
  
  YES
  
  x264 encoding @ 300 kbps: Pass 1 
  
  x264: x264 --profile baseline --preset slow --verbose --fps 24 --vbv-maxrate 300 --vbv-bufsize 600 --scenecut 0 --keyint 48 --output /opt/lampp/htdocs/tests_updates/sintel_trailer_2k_480p24_300kbit.h264 /home/niu/sintel_trailer_2k_480p24.y4m >out.txt 2>&1 
  
  mkdir: cannot create directory `/opt/lampp/htdocs/tests_updates/sintel_300kbit': File exists
  
  cp: omitting directory `/opt/lampp/htdocs/tests_updates/'
  
  copy audio: cp /opt/lampp/htdocs/tests_updates/ /opt/lampp/htdocs/tests_updates/sintel_300kbit/MP4Box multiplexing Video: /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264  
  
  mp4box: MP4Box -add /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264  /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  
  AVC-H264 import - frame size 854 x 480 at 24.000 FPS
  
  AVC Import results: 1253 samples - Slices: 27 I 1226 P 0 B - 1 SEI - 27 IDR
  
  Saving to /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4: 0.500 secs Interleaving
  
  MP4Box multiplexing Audio:/opt/lampp/htdocs/tests_updates/sintel_300kbit/ 
  
  mp4box: MP4Box -add /opt/lampp/htdocs/tests_updates/sintel_300kbit/ /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  
  Unknown input file type
  
  Unknown input file type
  
  Error importing /opt/lampp/htdocs/tests_updates/sintel_300kbit/: Bad Parameter
  
  MP4Box Cleaning ... 
  
  mp4box: MP4Box -no-sys  /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  
  Saving /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4: 0.500 secs Interleaving
  
  MP4Box segmentation: /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264  
  
  mp4box: MP4Box -frag 2000 -dash 2000 -rap -segment-name /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  
  DASH-ing file: 2.00s segments 2.00s fragments single sidx per segment
  
  Spliting segments at GOP boundaries
  
  [DASH] Generating MPD at time 2013-03-16T16:40:03Z
  
  DASHing file /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  
  terminate called after throwing an instance of 'std::out_of_range'
  
    what():  basic_string::substr
  
  Error: Unable to open MPD file!Aborted

  Why is this error at the end ?
  and also one folder got created in my /opt/lampp/htdocs/tests_updates/sintel_300kbit.
  which has two types of files :
  27 files of .m4s extension
  1 file -sintelinit.mp4
  1 file- sintel_trailer_2k_480p24_300kbit.mp4 , which when played in vlc player played the video bt no audio ! &

  1 file- sintel_trailer_2k_480p24_300kbit.h264 which cannot be opened.

  No .mpd file was created.

  Also I want to know aft creating that .mpd file how will i be able to test it on my android client say media player.

  I am damn confused with all this happening. Please help.

• Bash script to automate FFmpeg operations fails when calling the command, but copy-pasting the generated command into the terminal works [duplicate]

  28 février, par GaboScharff99

  I wrote a bash script which automates a number of conversion operations on video files using FFmpeg. Oddly enough, the FFmpeg call itself now fails when running the script, with a very confusing error message, I might add, but when I copy the command generated by the script into the terminal and run it, it works flawlessly. I'm sorry to insert such a long code block here, but considering how strange this error is, it might be anywhere in the script, so here it is :

  


  #!/bin/bash

audioTrack=1
subSource=1
subTrack=0
transcodeVideo=1
transcodeAudio=1
volumeMultiplier=1
degradeToStereo=0
subLanguage="Japanese"

while getopts "t:ns:vam:dl:h" opt; do
    case "$opt" in
        t) audioTrack=${OPTARG};;
        n) subSource=0;;
        s) subTrack=${OPTARG};;
        v) transcodeVideo=0;;
        a) transcodeAudio=0;;
        m) volumeMultiplier=${OPTARG};;
        d) degradeToStereo=1;;
        l) subLanguage=${OPTARG};;
        h)
            echo "Options:"
            echo "-t [integer]: Audio track number. Default: 1."
            echo "-n: If included, subtitles will be taken from internal source."
            echo "-s [integer]: Subtitles track number. Default: 0."
            echo "-v: If included, video source will be copied without transcoding."
            echo "-a: If included, audio source will be copied without transcoding."
            echo "-m [number]: Volume multiplier. If 1, volume is unaffected. Default: 1"
            echo "-d: If included, audio will be degraded to stereo."
            echo "-l [language]: Subtitles language. Only used for external subtitles source. Default: Japanese."
            exit 0
        ;;
    esac
done

echo "Audio track: $audioTrack."
echo "Subtitles track: $subTrack."
params="-map 0:0 -map 0:$audioTrack -map $subSource:$subTrack -c:v"

if [[ $transcodeVideo -eq 1 ]]; then
    echo "Video will be transcoded."
    params="$params hevc"
elif [[ $transcodeVideo -eq 0 ]]; then
    echo "Video will be copied without transcoding."
    params="$params copy"
fi

params="$params -c:a"

if [[ $transcodeAudio -eq 1 ]]; then
    echo "Audio will be transcoded."
    params="$params libopus"
elif [[ $transcodeAudio -eq 0 ]]; then
    echo "Audio will be copied without transcoding."
    params="$params copy"
fi

if [[ $volumeMultiplier -ne 1 ]]; then
    echo "Volume will be multiplied by a factor of $volumeMultiplier."
    params="$params -filter:a 'volume=$volumeMultiplier'"
else
    echo "Volume will be unaffected."
fi

if [[ $degradeToStereo -eq 1 ]]; then
    echo "Audio will be degraded to stereo."
    params="$params -ac 2"
elif [[ $degradeToStereo -eq 0 ]]; then
    echo "Audio will not be degraded to stereo."
fi

params="$params -c:s copy"

if [[ $subSource -eq 1 ]]; then
    echo "Subtitles source is external."
    echo "Subtitles language is $subLanguage."
    params="$params -metadata:s:s:0 title='' -metadata:s:s:0 language='$subLanguage'"
else
    echo "Subtitles source is internal."
fi

if [[ -f titles.txt ]]; then
    echo "A titles.txt file was found. Titles will be changed according to it."
    echo "Please check titles.txt to make sure the titles are correct."
    changeTitles=1
    counter=0
else
    echo "A titles.txt file was not found. Titles will not be changed."
    changeTitles=0
fi

read -p "Are these options correct? (y/n) " choice

case "$choice" in
    y|Y)
        echo "Initiating conversion sequence. This may take a while..."

        mkdir output
        currentParams=""

        shopt -s nullglob
        for i in *.mp4 *.mkv; do
            currentParams=$params
            fileNameNoExtension=$(echo $i | rev | cut -f 2- -d '.' | rev)

            if [[ $subSource -eq 1 ]]; then
                currentParams="-f srt -i $fileNameNoExtension.srt $currentParams"
            fi

            if [[ $changeTitles -eq 1 ]]; then
                ((counter++))
                currentParams="$currentParams -metadata title='$(awk "NR==$counter" titles.txt)'"
            fi

            ffmpeg -i "$i" $currentParams "output/$fileNameNoExtension.mkv"
        done

        echo "Conversion finished!"
    ;;
    n|N) echo "Operation canceled. Exiting.";;
    *) echo "Invalid input. Try again.";;
esac


  


  The directory I'm running this in contains six video files :

  


  

  1. E1 - The Pirates of Orion.mkv

  


  2. E2 - Bem.mkv

  


  3. E3 - The Practical Joker.mkv

  


  4. E4 - Albatross.mkv

  


  5. E5 - How Sharper Than a Serpent's Tooth.mkv

  


  6. E6 - The Counter-Clock Incident.mkv

  


  


  Here's the titles.txt file, for completion's sake :

  


  Star Trek: The Animated Series - Season 2, Episode 1 - The Pirates of Orion
Star Trek: The Animated Series - Season 2, Episode 2 - Bem
Star Trek: The Animated Series - Season 2, Episode 3 - The Practical Joker
Star Trek: The Animated Series - Season 2, Episode 4 - Albatross
Star Trek: The Animated Series - Season 2, Episode 5 - How Sharper Than a Serpent's Tooth
Star Trek: The Animated Series - Season 2, Episode 6 - The Counter-Clock Incident


  


  And finally, here's the error message given by FFmpeg on the terminal for every video file when running the command :

  


  Unable to find a suitable output format for 'Trek:'
Trek:: Invalid argument


  


  Maybe there are better ways to handle all of this, but first and foremost, I would like to figure out why the command fails with such a confusing error message. The only place where the string 'Trek :' is found is in the title taken from titles.txt, but I don't understand why that's seemingly being passed to the name of the output file instead of the title, and apparently only when running the script.

  


  Thanks a lot for your answers ! I know this is quite a bit of text, so I really appreciate you taking your time to read through this.

  


• FFMPEG mp3 file segmentation on Mac OSx Error . Only one full mp3 file generated as segmented file

  2 novembre 2017, par iThirst

  What I am trying to achieve is to take an MP3 file as source file and generate multiple segments of approx 10s each from it. I am using node’s fluent ffmpeg inside node js application. Below code works absolutely fine and generates proper results on Linux/Ubuntu 16.04 server while fails with below error on mac osx. It ends by generating single .mp3 file and .m3u8 playlist file on mac osx while it generates multiple segmented mp3 files (each 11s) if executed on ubuntu server.

  Error Log: 
  
  [mp3 @ 0x7fc469010c00] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 9223372036854422218 >= -9223372033278215478
  
  [segment @ 0x7fc469006a00] Packets poorly interleaved, failed to avoid negative timestamp -9223372033277846838 in stream 0.

  // Node js code to execute ffmpeg command is given below

  var command = ffmpeg(fs.createReadStream(directoryPath + fileName), {timeout : 900})
  
                      .inputFormat('mp3')
  
                      .inputOptions([                    
  
                          //'-re',
  
                          //'-i input.mp3',
  
                          //directoryPath +'albumart.jpg',
  
                          '-codec copy',
  
                          '-map 0',
  
                          '-f segment',
  
                          '-segment_list ' + directoryPath + fileName_noExtension + '.m3u8',
  
                          '-segment_list_flags +live',
  
                          '-segment_time 10',
  
                           directoryPath + 'out%03d.mp3'
  
                      ]);
  
   command.on('start',{}).on('stderror').on('end').output(directoryPath +  'Out.mp3')
  
          .run()

  //

  Any help is appreciated in this direction.