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• avformat/dash : move reused API to common file and header file

  1er septembre 2017, par Steven Liu

  avformat/dash : move reused API to common file and header file
  move from dashenc, move DASHTmplId and dash_fill_tmpl_params to
  
  dash.c, they will be used by dash demuxer and dash muxer.
  v2 fixed :
  
  1. rename common file from dashcomm.* to dash.*
  
  Suggested-by : Hendrik Leppkes <h.leppkes@gmail.com>
  v3 fixed :
  
  1. rename header file pre defined
  
  2. add ff_ prefix for the internal API
  
  Suggested-by : James Almer <jamrial@gmail.com>
  Suggested-by : Timo Rothenpieler <timo@rothenpieler.org>
  
  Reviewed-by : wm4 <nfxjfg@googlemail.com>
  
  Signed-off-by : Steven Liu <lq@onvideo.cn>
  

  • [DH] libavformat/Makefile
  • [DH] libavformat/dash.c
  • [DH] libavformat/dash.h
  • [DH] libavformat/dashenc.c

• ffmpeg/mkvtoolnix - Remuxing new audio track to a specific 'track' position ?

  22 octobre 2018, par Saxon Rix

  I’m currently working on using this ’nightmode downmix’ script for ffmpeg which I found here.

  @echo off
  
  set PATH_MKVMERGE=D:\Programs\VideoProcessing\mkvtoolnix
  
  set PATH=%PATH%;%PATH_MKVMERGE%
  
  @echo on
  
  
  
  cd /d %~dp0
  
  
  
  For %%a IN ("*.mkv") Do (
  
  echo ---------------------- BATCH STARTING %%~na%%~xa
  
  ffmpeg.exe -report -loglevel verbose -i "%%~na%%~xa" -map 0:a:0 -f wav -acodec pcm_f32le -ac 2 -af "pan=stereo|FL=FC+0.25*FL+0.60*LFE|FR=FC+0.20*FR+0.60*LFE" - | qaac.exe --tvbr 127 --quality 2 --rate keep --ignorelength --no-delay - -o "%%~na-ffmpeg.m4a" 1>>qaac.log 2>&1
  
  If exist "%%~na.srt" (
  
      mkvmerge.exe --split 4000M -o "%%~na-2chnightmode%%~xa" --no-chapters --no-audio "%%~na%%~xa" "%%~na-ffmpeg.m4a" "%%~na.srt" 1>>"mkvmerge.log" 2>&1
  
  ) Else (
  
      mkvmerge.exe --split 4000M -o "%%~na-2chnightmode%%~xa" --no-chapters --no-audio "%%~na%%~xa" "%%~na-ffmpeg.m4a" 1>>"mkvmerge.log" 2>&1
  
  )
  
  )

  Currently this just encodes the audio, then remuxes it with the video and in the end it leaves me with a video file with the original (copied) video & the down-mixed audio track as well as the separate audio file that it created.

  However, this puts the new audio track to the bottom of the stack. Eg, The original file has audio tracks in this order :

  1. 5.1 Track
  2. Commentary Track

  The newly exported audio goes at the end like this :

  1. 5.1 Track
  2. Commentary Track
  3. nightmode track

  Is there any way to force the new track to be the 2nd track, and move all other tracks (except the default track) below it, as well as give the track a title such as ’NightMode 2.0’ ? And also to automatically delete the ’intermediate’ audio track it creates after it’s all been muxed back together ?

  So that in the end I’m left with a re-muxed video file that has all the original audio tracks in, as well as the newly created ’NightMode’ track too as the second audio track (after the default track).

  Is this possible please ?

• FFMPEG How to insert short video and audio in longer video in specific time, size and position

  24 novembre 2020, par Milos Dimitrijevic

  FFMPEG How to insert short video (4sec) in longer video in specific time (from 15th to 19th second) and specific size. Long video is 1920x1080px and inserted video should be 1720x820px, positioned in the middle ?

  


  file info..
Duration : 00:00:22.07, start : 0.000000, bitrate : 3982 kb/s
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 3900 kb/s, 29 fps, 29 tbr, 14848 tbn, 58 tbc (default)
Metadata :
handler_name : VideoHandler
Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata :
handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'short.mp4' :
Metadata :
major_brand : mp42
minor_version : 19529854
compatible_brands : mp42isom
creation_time : 2020-10-25T11:01:10.000000Z
Duration : 00:00:03.02, start : 0.000000, bitrate : 14405 kb/s
Stream #1:0(eng) : Audio : aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 319 kb/s (default)
Metadata :
creation_time : 2020-10-25T11:01:10.000000Z
handler_name : Sound Media Handler
Stream #1:1(eng) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 14078 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
Metadata :
creation_time : 2020-10-25T11:01:10.000000Z
handler_name : Video Media Handler
encoder : AVC Coding