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• FFmpeg Batch Merge From Input Folder

  4 septembre 2022, par Parham.8

  I have this command that works perfectly fine :

  


  echo off
mkdir inputs
mkdir outputs
set "InputFolder=%~dp0inputs"
for /R "%InputFolder%" %%i in (*.mp4) do ffmpeg -i "%%i" -c copy "outputs\%%~ni.mkv"


  


  I'm trying to make this command work as well with no success :

  


  echo off
mkdir inputs
mkdir outputs
set "InputFolder=%~dp0inputs"
for /R "%InputFolder%" %%i in (*.mp4) do (ffmpeg -n -i "%%~ni.mp4" -i "%%~ni-eng.srt" -c copy -max_interleave_delta 0 -map 0 -map -0:v:1? -map -0:v:2? -map 1 -fflags +bitexact -map_metadata:g -1 -map_metadata -1 -metadata title="" -metadata comment="" -metadata:s:v title="" -metadata:s:v language="und" -metadata:s:v VENDOR_ID="" -metadata:s:a title="" -metadata:s:a:0 language="eng" -metadata:s:a:0 handler_name="English" -metadata:s:a VENDOR_ID="" -metadata:s:s:0 language="eng" "outputs\%%~ni.mkv")


  


  Any suggestions to make it work ?

  


• How to chose the default audio track on IOS HLS

  18 juillet 2020, par Maxou

  when I set my default audio track in my playlist with the "DEFAULT" params the IOS native player doesn't choose the right one. For example with the playlist below IOS choose the french audio track

  


  this is my playlist file :

  


  #EXTM3U
#EXT-X- VERSION:3

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",LANGUAGE="jpn",NAME="Japonais",DEFAULT=YES,AUTOSELECT=YES,URI="audio/1/128kbit.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",LANGUAGE="fre",NAME="Français",DEFAULT=NO,AUTOSELECT=YES,URI="audio/2/128kbit.m3u8"

#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Français",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE="fr",URI="subtitles_fr.m3u8"

#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=9000000,AUDIO="audio",SUBTITLES="subs"
video/index.m3u8


  


  Any ideas ?

  


• Swift : How can I generate Mp4 video from programmaticall output ? [closed]

  21 août 2020, par Mount Ain

  This question is specifically to Swift programming language for Linux & macOS platforms.To understanding the concept, I used Swift programming language. But not depend on Swift programming language. C or C++ is also good to me.

  


  I can generate JPEG image from NSView by using NSBitmapImageRep. But Linux I don't what I want to do. So, the first thing I need to know is the step to generate JPEG image by programmatically without using the NSView. I really don't know How hard it is. But I want to learn how it's work. I feel It's the way to fill the color into pixels one by one to combine a Image. But I don't know How to do in programming. I knew the same way is used in videos by packing the series of image with audio & subtitle & other meta info.

  


  If you ask about compression, I really want to know How Twitter & YouTube compressing uploaded videos without loss of quality.

  


  So what is the concept,

  


  

  1. To generate a JPEG image by programmatically without using NSView ?

  


  2. To generate MPEG-4 video by group of JPEG images ?

  


  


  Thanking in advance...