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• FFMPEG - Crop image so that height and width of image are equal

  2 septembre 2020, par Sarmad S.

  Using ffmpeg, I want to be able to crop an image so that the dimensions become equal. For example if I have an input image that is 1600x1000, after cropping it should be 1000x1000 (because 1000 is the smallest amongst the two dimensions). When cropping the image, it should crop equally from both sides.

  


  Some examples :
Input image : 1600x1000 -> crop 300px from the left and 300px from the right side. Final image 1000x1000.

  


  Input image : 1100x1500 -> crop 200px from the top and 300px from the bottom. Final image 1100x1100.

  


  I can use this the command below to crop left and right or bottom and top or both. But the problem is that I want to crop only the largest dimension. Is there any way to know the largest dimension ?

  


  crop=in_w-in_h/2:in_h-in_w/2


  


• is there any solution of the below problem

  18 mai 2020, par Sonu

  This is code and I'm getting the following issue filename is "ply_audio.py"

  



      from pydub import AudioSegment&#xA;    ># read/write data&#xA;    > data = AudioSegment.from_file(file="one.wav",format="wav")&#xA;    >data.export("new_test.wav")&#xA; > python ply_audio.py&#xA;&#xA;C:\Users\raj\AppData\Local\Programs\Python\Python38\lib\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn&#x27;t&#xA; find ffmpeg or avconv - defaulting to ffmpeg, but may not work&#xA;&#xA;warn("Couldn&#x27;t find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)&#xA;&#xA;C:\Users\raj\AppData\Local\Programs\Python\Python38\lib\site-packages\pydub\utils.py:198: RuntimeWarning: Couldn&#x27;t&#xA; find ffprobe or avprobe - defaulting to ffprobe, but may not work&#xA;  warn("Couldn&#x27;t find ffprobe or avprobe - defaulting to ffprobe, but may not work", RuntimeWarning)&#xA;&#xA;Traceback (most recent call last):&#xA;  File "ply_audio.py", line 4, in <module>&#xA;data = AudioSegment.from_file(file="one.wav",format="wav")&#xA;&#xA;File "C:\Users\raj\AppData\Local\Programs\Python\Python38\lib\site-packages\pydub\audio_segment.py", line 685, i&#xA;n from_file&#xA;&#xA;info = mediainfo_json(orig_file, read_ahead_limit=read_ahead_limit)&#xA;&#xA; File "C:\Users\raj\AppData\Local\Programs\Python\Python38\lib\site-packages\pydub\utils.py", line 274, in mediainfo_json res = Popen(command, stdin=stdin_parameter, stdout=PIPE, stderr=PIPE)&#xA;&#xA;File "C:\Users\raj\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 854, in __init__&#xA;    self._execute_child(args, executable, preexec_fn, close_fds,&#xA;&#xA;File "C:\Users\raj\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 1307, in _execute_child&#xA;    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,&#xA;&#xA;FileNotFoundError: [WinError 2] The system cannot find the file specified&#xA;&#xA;</module>

  


• What is the best solution of motion interpolation by CPU ?

  31 mars 2022, par Stacker Dragon

  I've been using FFmpeg's "minterpolate" filter to implement motion interpolation to get a higher frame rate for a while. However, because "minterpolate" doesn't support hardware acceleration and multithread, it is very slow to finish that process, particularly on devices that only have CPU, which make the situation worse because I cannot use neural network such as DAIN(by SJTU).

  



  Thus, I would like to ask for some alternatives for "minterpolate" filter, which is supposed to be faster and has a decent quality.

  



  I knew SVP can do, but it is not open-sourced and therefore it cannot be integrated to other software.