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• how to solve Build_one function error ?

  10 mai 2014, par vinoth

  I’m trying to separate audio and video from video file. After searching on the internet I came to know it can be done using FFMPEG.

  Now I need to build FFMPEG library file for my Android application using Ubuntu version 14.04 (64-bit) NDK R9 ffmpeg 2.2.2 while building it causes an error below line :

  build_android.sh : 9 : build_android.sh : function : not found.

  Logout :

   #!/bin/bash
  
  
  
  NDK=$HOME/Desktop/adt/android-ndk-r9
  
  
  
  SYSROOT=$NDK/platforms/android-9/arch-arm/
  
  
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
  
  
  
  function build_one
  
  
  
  {
  
  
  
  ./configure \
  
  
  
      --prefix=$PREFIX \
  
  
  
      --enable-shared \
  
  
  
      --disable-static \
  
  
  
      --disable-doc \
  
  
  
      --disable-ffmpeg \
  
  
  
      --disable-ffplay \
  
  
  
      --disable-ffprobe \
  
  
  
      --disable-ffserver \
  
  
  
      --disable-avdevice \
  
  
  
      --disable-doc \
  
  
  
      --disable-symver \
  
  
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  
  
      --target-os=linux \
  
  
  
      --arch=arm \
  
  
  
      --enable-cross-compile \
  
  
  
      --sysroot=$SYSROOT \
  
  
  
      --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
  
  
      --extra-ldflags="$ADDI_LDFLAGS" \
  
  
  
      $ADDITIONAL_CONFIGURE_FLAG
  
  
  
  make clean
  
  
  
  make
  
  
  
  make install
  
  
  
  }
  
  
  
  CPU=arm
  
  
  
  PREFIX=$(pwd)/android/$CPU
  
  
  
  ADDI_CFLAGS="-marm"
  
  
  
  build_one

  To fix that issue I searched on the internet and I got a solution. Either in ./build_android.sh or in ./configure you have an extra ^M. Open the files with vi and clean them from this garbage.

  I’ve fixed it and tried by fixing some other solution also but remains the same.

  How can I fix this ?

• Extract just the audio link from a youtube video without converting

  27 janvier, par MR-4O4

  I know there are hundreds of sites to convert youtube video to mp3. Most of them do it by first downloading the video and then converting it to mp3(or any other audio format) on their server using youtube-dl, ffmpeg or similar programs.

  



  What I want to know is, is there any way I can just extract the audio link for any youtube video ? I don't know if it's possible but I saw a couple of websites doing it .

  



  First Website : Openaisearch.com
This website simply gives a download link for the audio(getting it from youtube videos). I searched for a song and saw the download url, it looked something like this :

  



  https://redirector.googlevideo.com/videoplayback?source=youtube&requiressl=yes&clen=3814013&upn=dzwY9aUVYME&lmt=1469875393441562&expire=1484854959&mime=audio%2Fmp4&nh=IgpwcjAxLnNlYTA5Kg01Mi45NS4yMTYuMTAy&itag=140........... 


  



  I believe that this is not done by first downloading and converting the video to audio format(Correct me if I am wrong).
Although the file which gets downloaded after using this link is without any extension, but adding ".m4a" at the end of downloaded file does the work.

  



  Second Website : http://keepvid.com/ ?url=https ://www.youtube.com/watch?v=PT2_F-1esPk

  



  Again similar website with similar audio link. You can check by visiting the URL and see link of audio files.

  



  Any idea how these websites get that "googlevideo.com" link ? Do they scrap the youtube video links or something ?

  



  Thanks.

  


• FFMPEG Audio stream/layer and SRT from one mkv to an other

  13 juillet 2022, par kormorfor

  I have an FFMPEG question for you !

  


  Problem :

  


  I have 2 files(x265)

  


  01.mkv with multiple audio steams and multiple subtitles (with exactly named layers)

  


  02.mkv with multiple audio steams and multiple subtitles (with exactly named layers)

  


  I would like to add specific audio layer(GER) and specific subtitle(GER)
from 02.mkv to 01 mkv at the same time if it is possible.
(The metadata positions almost always random in file 02.mkv so I can't say it is "-map 0:s:2 for ger subtitle"...)

  


  I have already searched and tried multiple solutions ...

  


  This kind of worked with multiple steps but loses audio and subtitle metadata(Title) during process.

  


  German audio layer extract from 02.mkv to aac

  


  ffmpeg -i 02.mkv -map 0:a:m:language:ger 02.aac


  


  German subtitle layer extract from 02.mkv to srt

  


  ffmpeg -i 02.mkv -map 0:s:m:language:ger 02.srt


  


  Adding extracted audio to 01.mkv

  


  ffmpeg -i 01.mkv -i 02.aac -map 0 -map 1 -codec copy outputfinall_1.mkv


  


  Adding extracted srt to 01.mkv none of this works

  


  1.)

  


  ffmpeg -i 01.mkv -i 02.srt -c copy -c:s mov_text outputfinall_2a.mkv


  


  BUG : Subtitle encoding currently only possible from text to text or bitmap to bitmap

  


  2.)

  


  ffmpeg -i 01.mkv -i 02.srt -map 0 -map 1 -codec copy outputfinall_2b.mkv


  


  works but does not show subtitles while playing only that is there.

  


  Please if you can help I would like a less jumbled mess code for this problem.
With keeping the metadata (titles) of the moved audio stream and subtitle.

  


  Thank you for your time !