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• How to disable non-1st Audio Streams/Tracks in FFmpeg for mp4 files

  16 décembre 2016, par Dipesh

  My end goal is to create a single FFmpeg command that will convert my h264.DTS.mkv files to a format that is compatible with my AppleTV, whilst preserving the original quality.

  I’m almost there, however I have not been able to figure out how to disable streams/tracks.

  So far I have got :

  ffmpeg -i FILE \
  
   -y -strict experimental \
  
   -map 0:0 -map 0:1 -map 0:1 -map 0:1 -map 0:2 \
  
   -c:0 copy -c:1 aac -ac:a 2 -c:2 ac3 -ac:a 6 -c:3 copy -c:4 mov_text \
  
   OUTPUT

  This produces an output file that looks like :

  1. H264 video track (enabled) [copied from original]
  2. AAC 2 channel audio track (enabled)
  3. AC3 6 channel audio track (enabled)
  4. DTS 6 channel audio track (enabled) [copied from original]
  5. subtitle track (enabled)

  The problem is I need it to look like :

  1. 1 H264 video track (copied from original) (enabled)
  2. 1 AAC 2 channel audio track (enabled)
  3. 1 AC3 6 channel audio track (disabled)
  4. 1 DTS 6 channel audio track (copied from original) (disabled)
  5. 1 subtitle track (enabled)

  Hence I need to know how I can disable the non-1st Audio Streams/Tracks.

  From what I have read, this is part of the track header atom at the location "tkhd.flags". But I have not been able to figure out how to set this via command line arguments.

  Any help would be greatly appreciated.

• OpenShot export no sound [closed]

  25 juin 2021, par Oneiroi

  Version : openshot-2.5.1-6.fc34.noarch

  


  Imported mp4 file with audio track.

  


  Export to mp4 format, AAC audio, lacks audio track verified with ffmepg and VLC (audio track is absent in exported file).

  


  I have already tried :

  


  

  1. Right click video track, set Enable audio to ON (from auto).

  


  2. Edit -> Preferences -> Preview, set output device from Default to specific
device

  


  


  Verified imported clip has audio even by right click track -> Display -> show waveform

  


  How can I export to mp4 format, with audio ?

  


  At the moment presuming "simple" option I am not seeing, perhaps ?

  


  Thanks in advance.

  


• Does not work -hls_playlist in ffmpeg in the -dash section

  18 mars 2019, par jidckii

  I will use this assembly ffmpeg
  https://hub.docker.com/r/jrottenberg/ffmpeg/

  ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  
  built with gcc 6.2.1 (Alpine 6.2.1) 20160822  

  I’m trying to do dash and hls at the same time.

  In the documentation from here http://ffmpeg.org/ffmpeg-all.html#dash-2

  the key is :

  -hls_playlist hls_playlist
  
  
  
  Generate HLS playlist files as well. The master playlist is generated
  
  with the filename master.m3u8. One media playlist file is generated for
  
  each stream with filenames media_0.m3u8, media_1.m3u8, etc.

  those. mpd and m3u8 must be created at the same time.

  Running :

  ffmpeg -re \
  
  -analyzeduration 20000000 \
  
  -i udp: //239.0.0.1: 1234? overrun_nonfatal = 1 \
  
  -map 0 \
  
  -c copy \
  
  -f dash \
  
  -min_seg_duration 5000000 \
  
  -window_size 10 \
  
  -extra_window_size 10 \
  
  -remove_at_exit 1 \
  
  -hls_playlist 1 \
  
  -use_timeline 1 \
  
  -use_template 1 \
  
  -vtag avc1 \
  
  -atag mp4a \
  
  cam01.mpd

  and get an error :

  Unrecognized option 'hls_playlist'.  
  
  Error splitting the argument list: Option not found`

  without the -hls_playlist
  everything works correctly ...

  What could be the problem ?