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• 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

• Create Video Programmatically with Qt 5.0

  29 mars 2016, par Joey

  We have a QT application that renders programmatically generated QPixmaps one by one to the display and we would like to save this output to a video file. I know that in the past people have recommended using ffmpeg or opencv with Qt to do this. In Qt 5, however, the new QtMultimedia module seems to expose some of this type of functionality. It is now possible, for example, to save video from a camera source in Qt 5 by using the QMediaRecorder as described in http://qt-project.org/doc/qt-5.0/qtmultimedia/qmediarecorder.html#details. With this new functionality, is there any way to use Qt 5 to save our programmatically generated video, or am I still better off using a third party library ?