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• Android : How to use Bambuser source code ?

  15 juin 2012, par Ravin

  I am trying to use Bambuser in my application. I just downloaded the source code meant for Android phone and I have extracted it to get a ffmpeg folder. Now I want to use this information in my Android Eclipse project. How would I go about doint it ? I checked the folder and there seems to be a Makefile in it and also some .c files. This seems like it's coded in C but can I still use it in my Java Android project ?And how would I do that ?Please help.

• ffmpeg combine audio mix code into complex concate script

  15 mai 2020, par sisterbrother

  I got currently 2 different ffmpeg scripts which I want to combine. I do not have good ffmpeg experience and those codes are mostly googel code so please be patient with me

  



  The first code is concating 3 videos :

  



  ffmpeg -y -i "$vid1" -i "$fp" -i "$vid1" -filter_complex \
"[0:v]scale=$cResolution:force_original_aspect_ratio=decrease,pad=$cResolution:(ow-iw)/2:(oh-ih)/2,setsar=1,fps=30,format=yuv420p[v0]; \
 [1:v]scale=$cResolution:force_original_aspect_ratio=decrease,pad=$cResolution:(ow-iw)/2:(oh-ih)/2,setsar=1,fps=30,format=yuv420p[v1]; \
 [2:v]scale=$cResolution:force_original_aspect_ratio=decrease,pad=$cResolution:(ow-iw)/2:(oh-ih)/2,setsar=1,fps=30,format=yuv420p[v2]; \
 [0:a]aformat=sample_rates=48000:channel_layouts=stereo[a0]; \
 [1:a]aformat=sample_rates=48000:channel_layouts=stereo[a1]; \
 [2:a]aformat=sample_rates=48000:channel_layouts=stereo[a2]; \
 [v0][a0][v1][a1][v2][a2]concat=n=3:v=1:a=1[v][a]; \
 [v]drawtext=text='example..':y=h-line_h-$h3:x=w/30*mod(t\,20):enable='gt(mod(t,$dr2),$Introdr_rounded)'[v]; \
 [v]drawtext=text='example..':y=h-line_h-$hcentral:x=w/20*mod(t\,100):enable='gt(mod(t,$dr2),$Introdr_rounded)'[v]; \
 [v]drawtext=text='example..':y=h-line_h-23:x=w/30*mod(t\,20):enable='gt(mod(t,$dr2),$Introdr_rounded)'[v]" \
 -map "[v]" -map "[a]" -c:v libx264 -crf 22 -preset veryfast -c:a aac -movflags +faststart "$fp_dest"


  



  The second code is overlay a background mp3 in endless loop to the created video from above. Its important to know that this code does overlap the audio of the video and does not replace it. In future I will lower the volume of the mp3 files to work as background music

  



  ffmpeg -y -i "$fp_dest" -filter_complex "amovie=$audio:loop=0,asetpts=N/SR/TB[aud];[0:a][aud]amix[a]" -map 0:v -map '[a]' -c:v copy -c:a aac -b:a 256k -shortest ./test.mp4



  



  So currently I got 2 steps which I want to combine into 1 step. Can you please help me to include the second code into the first one without change any logic of the code ?

  


• FFmpeg : how to use C++ code to change the frame rate of a video file ?

  27 mars 2014, par user1914692

  I know it would be easier to use FFmpeg commands to change the frame rate of a video file.
  But anyway, if I want to do it in C++ code, and use FFmpeg libraries, how could I do it ?

  I think I should've be able to find out the clue in the source code.
  Just before proceeding, I hope there would be some good introductions or examples.