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• Output file not specified [closed]

  16 mai 2024, par Rich Madrid

  I have been messing around with ffmpeg working on basic mkv to mp4 conversions the last couple of days on my Mac and Windows computers. Mac was easier buy my windows desktop has a much faster OS so I wanted to do some conversions on it tonight. Got ffmpeg installed and working.

  


  After having some issues with the command prompt not finding the directory, I solved that with the following basic code to convert an mkv file to an mp4 for me :

  


  ffmpeg -i "C:\Users\Computer\videos\decade.mkv" "C:\Users\Computer\Videos\RJ videos\Complete\decade.mp4"


  


  I moved on to wanting to scale up an mkv to 1080p and use a yadif filter. I couldn’t find an adequate way to do this so I used a portion of the command that worked on my Mac last night, and stuffed it into the command for windows and I got an error code “at least one output file must be specified” after using the following command :

  


  ffmpeg -i "C:\Users\Computer\videos\decade.mkv" -vf "yadif=1,scale=1440x1080:flags=lanczos,setsar=1" -c:v libx264 -crf 21
-c:a aac -b:a 128k -ar 48k "C:\Users\Computer\Videos\RJ videos\Complete\decade.mp4"


  


  What am I doing wrong ?

  


• Compile FFMPEG Using Eclipse Android

  3 septembre 2013, par Ivelius

  NDK experts , I need your help...

  My goal is to easily compile ffmpeg library using android NDK and eclipse.

  What I usally do when I want to develop using NDK , is right click on android project in eclipse ->Android Tools -> Add Native support. And Everything works and compiles.
  Every time I want to build my project , I just hit "Build" button (with a hammer icon on it).

  Now I just need to add all ffmpeg libraries and run a simple program like this.
  I downloaded latest ffmpeg libraries from official website.I've extracted downloaded content into JNI library . And when I try to build , I get countless errors. Something like
  "fatal error : libavutil/avconfig.h : No such file or directory" ...

  My Android.mk file looks like this :

  LOCAL_PATH := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  include $(call all-subdir-makefiles)
  
  
  
  LOCAL_MODULE    := HELLONDK
  
  LOCAL_SRC_FILES := hello-ndk.cpp
  
  
  
  include $(BUILD_SHARED_LIBRARY)

  EDIT :
  I've been looking for a solution for a few days before posting this question.

• Looking for a multimedia SDK (open source or paid) which can play audio (.mp3, .aac) and video (.mp4 etc.)

  8 avril 2022, par AhmadH

  I would like to embed audio (and video) files in my cross platform application.
Searching for an SDK with below functionality :

  


  

  1. Play audio - .mp3,.aac (are must) & other common formats

  


  2. Play video - .mp4 & other common formats

  


  3. Audio recording would be an added advantage.

  


  4. Open source or affordable price

  


  


  [ Note : FFmpeg is not an option due to some License restriction]

  


  **Anything that has all FFmpeg properties would be ideal.

  


  Looking online but haven't found any suitable option.
Please help.