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• Setting image duration with -t

  3 septembre 2020, par ottpeter

  I am generating an ffmpeg command with bash. This is how I'm generating the input list :

  


  INPUT_LIST=""
for file in $VIDS_PATH*
do
    if [ ${file: -4} == ".jpg" ]
    then
        INPUT_LIST="${INPUT_LIST} -t $IMAGE_DURATION -i $file"
    else
        INPUT_LIST="${INPUT_LIST} -i $file"
    fi
done


  


  And then the filter complex is generated like this :

  


  [$i:v]scale=$RES_X:$RES_Y:force_original_aspect_ratio=1,pad=wi   dth=$RES_X:height=$RES_Y:x='if(lt(in_w,in_h),$PADDING,0)':0,setsar=1[v$i];


  


  I want images to last for 10 seconds. Now images are only lasting for 1 frame.

  


  The generated input list looks something like this :

  


  -i /PATH/World_Map_Perspective_1_4K_preview.mp4 -i /PATH/preview.mp4 -i /root/vids/301img.jpg -t 10


  


  Why is this not working ?

  


• FFMPEG converting all files in a folder and generating the output into another folder

  5 avril 2023, par User

  Have generated the following code by searching on the web ; unfortunately there is some mistake here,maybe basic, that isn't allowing the code to run.

  


  the code is supposed to :
  
1.work on all files inside the fodler
  
2.convert the files into a 1x1 video ( works alone )
  
3.the generated video will be sent to a specific fodler named \sub , a subfolder inside the main folder

  


  for i in *.mp4; do  
  ffmpeg -i "$i" -codec:v libx264 -preset fast -b:v 7500k -filter:v "crop=in_h:in_h" -maxrate 10000k -codec:a aac "sub\fixed-$i.mp4"; 
done 


  


  the output is :

  


  i was unexpected

  


  tried searching on the web trough similiar questions

  


• Android ffmpgeg - Nothing happens

  25 juillet 2015, par Ch4t4r

  for my current project I compiled myself ffmpeg together with the x264 libary, following this

  tutorial. I already saw many questions regarding this topic, but none of the really helped me. Before that I tried many other things which resulted in many .so files (libavcodec etc.). Since I don’t have the time (yet) to work with JNI in depth I wanted to rely to the command line, which the tutorial above seemed to provide. But here comes the problem : the generated file doesn’t do anything (no output and no error messages) when I run it with Process on my Android device. I’ve come to the conclusion, that the generated file still is a .so file (it is readable with readelf). So far I haven’t found a solution to run ffmpeg on my device with the command-line. Do you know if I did something wrong ?

  Thanks,
  Daniel