Recherche avancée

Sur d’autres sites (5001)

• Solution Merge mp3+mp4 together with FFMPEG or other

  7 juin 2018, par SandyUgale

  I have been working on a project where I have .mp3 and video file (.MP4). I have FFMG on my AWS server and I’m providing both to FFMPEG give me complete video file with provided audio file. Then I send this file to my AWS S3 and then fetch this video as needed in my web app.

  Problem/Use Case :

  If I have 10 mp3 and 10 mp4 video files then I have to wait the until it complete all videos then only I can send them on S3, so Im waiting for long as number goes up.

  Can I control this ?

  Solution-1 : Don’t need to wait for loop

  Meaning instead of starting all merging together parallel I would like merging to be done one by one. Referencing above example

  First merge of 1.mp3 + 1. Mp4= 1.mp4 (complete file) –upload s3.  
  
  Second merge of 2.mp3 + 2. Mp4= 2.mp4 (complete file) –upload s3.  
  
  Tenth merge of 10.mp3 + 10. Mp4= 10.mp4 (complete file) –upload s3.  

  Solution-2 : send video as they ready

  How I can know which video has been ready to send to s3 ?

  Solution-3 : other service

  Is there any other online API or services where I can pass mp3 + mp4 and give me video url simply after merging so technically video will hosted on either their platform or on my S3 doest matter.

• need help using ffmpeg to "concat" multiple audio files (webm, mp4) to make one longer MP3 of audio

  28 septembre 2020, par djturbojp7

  I have done some searching (for several hours) and tried to manipulate many examples to work for me, but I still keep coming up empty here.

  


  I am using linux-mint 19, with ffmpeg installed. I have a folder with several audio files. The majority of these are "webm" (with no video) and there are a few "m4a". I am trying to make one long mp3 file from the audio in all of these strung together from start to finish.

  


  Lets say for sake of argument, my directory has the following files :

  


  audio file a.webm
audio file b.webm
audio file c.m4a
audio file d.webm


  


  I found a script that I could write online where someone is creating a file called "mylist.txt" with this bit of code :

  


      # with a bash for loop
for f in ./*.*; do echo "file '$f'" >> mylist.txt; done
# or with printf
printf "file '%s'\n" ./*.* > mylist.txt


  


  this generated a text file with the following type of content :

  


  file './audio file a.webm'
file './audio file b.webm'
file './audio file c.m4a'
file './audio file d.webm'


  


  first, I believe the "./" is causing a problem, because when I look at other examples I don't see this but I am not sure why it is generating this way in my script because I don't see this in web examples online. Second, I have tried to "concate" this with ffmpeg but I'm not sure which is the best option. I found some documentation here :

  


  https://trac.ffmpeg.org/wiki/Concatenate

  


  however this example applies to video specifically

  


  Can anyone lead me in the right direction ?

  


  EDIT******

  


  I tried the solution below, with "mylist.txt" as the input and I am getting an error :

  


      user@machine/TEMP$ ffmpeg -i mylist.txt -filter_complex "[0:a][1:a][2:a][3:a]concat=n=20:a=1:v=0[a]" -map "[a]" output.mp3
ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, tty, from 'mylist.txt':
  Duration: 00:00:00.40, bitrate: 47 kb/s
    Stream #0:0: Video: ansi, pal8, 640x400, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream specifier ':a' in filtergraph description [0:a][1:a][2:a][3:a]concat=n=20:a=1:v=0[a] matches no streams.


  


• FFmpeg : building example C codes

  23 février 2021, par J. S.

  I have configured and compiled the FFmpeg library using this link :
https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

  



  Now, I am trying to build example C codes provided by FFmpeg from here :
https://github.com/FFmpeg/FFmpeg/tree/master/doc/examples

  



  However, when I run make install-examples or make install (suggested by /example/README), I receive this kind of message :

  



  


  make : *** No rule to make target '/doc/examples/README', needed by
 'install-examples'. Stop.

  


  



  I thought this may be due to the rules not being in the correct MakeFile format (I am not sure why they refers to README). How should I go about in fixing this and compiling the example codes ? I have tried to find solutions about this, but there doesn't seem to be much information online.

  



  Thank you.