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• Build FFMPEG with x264 error

  11 janvier 2012, par Kage

  I am trying to build FFMPEG with libx264.

  I can successfully build and use FFMPEG for Android but I realized that I need the ability to encode, therefore I am trying to build FFMPEG with x264.

  When trying to build FFMPEG I get an error :

  "ERROR : libx264 not found"

  And in my log it says :

  "/usr/local/lib/libx264.a : could not read symbols : Archive has no
  index ; run ranlib to add one..."

  I have the latest versions of both FFMPEG and x264.
  I understand that FFMPEG looks for the header and libraries in usr/lib and usr/include, so in order to make it find x264 I use the cflags and ldflags :

  • —extra-cflags = " -I/usr/local/include "
  • —extra-ldflags = " -L/usr/local/lib "

  I have tried building x264 with many different options that other people on the internet have said that i need. eg. —enable-shared, —enable-static, —disable-pthreads etc.
  Some forums say enable this, others say no disable that.

  Any help would be much appreciated,
  Thanks

• FFMPEG - merge 2 videos side by side

  21 février 2023, par BlueMatrix

  I have 2 videos, same video and audio quality but different length.
Lets say the video resolution is 1920x1080 pixel

  


  I want to merge both videos side by side, considering the longest length.

  


  What I found so far, but it is not what I need :(

  


  On internet I found many examples which gives me the outcome of 3840x1080 pixel.


  


  What I want :

  


  Outcome: Video with 1920x1080 pixel 
use from video1: left part, such Pixel 1 to 960 
use from video2: right part, such Pixel 961 to 1920
audio is merged, i.e. I can hear both audios simultaneously as available


  


  What I want - optional :

  


  Between 2 videos, there is a visible split like |


  


  Is there a single ffmpeg command line I can use ?

  


  Many Thanks,
BM

  


• Android RTSP streaming buffer size for delayed playback

  19 novembre 2012, par frijj2k

  I can access and view RTSP streams from IP cameras on Android via the VideoView component without problems.

  Now I need to play the RTSP stream with a delay (i.e. if I specify a 30 second delay, the playback on screen should be 30 seconds behind the source and the delay needs to be variable though not during playback, only at the point of connecting to the source).

  I originally thought this would not be a problem as I could simply change the RTSP buffer duration before connecting to the camera but unfortunately it seems the buffer size is baked into the firmware and cannot be changed in software. Now I have got a horrible feeling that my way forward will be to compile a version of FFMpeg for Android and somehow get the stream data out from the library, buffer it and then render it myself and I have no experience with FFMpeg.

  I am unsure how I would now go about solving this problem and any help or pointers in the right direction would be greatly appreciated.

  Update :

  Sorry I forgot to mention, the RTSP stream is being accessed over WiFi on a LAN so no huge latency issues here from going over the Internet.