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• How to detetc hardware acceleration in ffmpeg

  19 décembre 2020, par Ali Razmkhah

  I am writing c++ program to screen record by ffmpeg 4.3 ! I need to detect hardware acceleration support such as h264_qsv or h264_nvenc without running ffmpeg.exe !

  


  I explored ffmpeg.exe source code and found no results ! some solutions are deprecated or dose not work on 4.3 !
As instance,

  


  avcodec_find_encoder_by_name("h264_qsv")


  


  returns null even it is exist and works properly !

  


• UnsupportedAudioFileException in LIUM Speaker Diarization after re-sampling

  14 septembre 2016, par RAVI D PARIKH

  I am trying to configure LIUM tool for speaker diarization. This question is a follow up of UnsupportedAudioFileException in LIUM Speaker Diarization

  I have tried re sampling the file using sox and ffmpeg

  I am new to any sorts of programming and i have followed all steps described in LIUM quick start guide and the above link. I still get the same error. I think my input file has issues related to header as mentioned by Nikolay Shmyrev in the above link however i have no clue on how to solve it.

  My code is as below :

  java –jar  C:\Users\Ravi\Desktop\LIUM_SpkDiarization-8.4.1.jar \ --fInputMask= C:\Users\Ravi\Desktop\converted_f2.wav--sOutputMask= C:\Users\Ravi\Desktop\converted_converted_2.seg -–help --doCEClustering

  Error :

  10:52.037 SEVERE AudioFeatureSetFa  FileNotFoundException
  
  java.io.FileNotFoundException:
  
          at java.io.FileInputStream.open0(Native Method)
  
          at java.io.FileInputStream.open(Unknown Source)
  
          at java.io.FileInputStream.<init>(Unknown Source)
  
          at com.sun.media.codec.audio.mp3.JS_MP3FileReader.getAudioFileFormat(JS_MP3FileReader.java:82)
  
          at javax.sound.sampled.AudioSystem.getAudioFileFormat(Unknown Source)
  
          at fr.lium.spkDiarization.libFeature.AudioFeatureSetFactory.getAudio(AudioFeatureSetFactory.java:162)
  
          at fr.lium.spkDiarization.libFeature.AudioFeatureSetFactory.MakeFeature(AudioFeatureSetFactory.java:207)
  
  </init>

  The input file is at https://drive.google.com/file/d/0B7Fqe9EX5JbgT09BcXpSREd4em8/view?usp=sharing

  Input File Name:converted_f2.wav

  I have put the command and the full output of the prompt in a word document at

  https://drive.google.com/file/d/0B7Fqe9EX5JbgUUl6THNCZFgxRnM/view?usp=sharing

  The inpiut file has correct sampling rate and other parameters and thus i am not able to understand the cause of the error.
  Thanks a lot for the help

  Regards,
  Ravi

• Getting an error from pyffmpeg when running as a submodule

  3 décembre 2023, par Devin Gardner

  I'm working on building an API using pyffmpeg and pytube to download YouTube videos and convert them to .wav files, synced up with some LED animations. I'm importing pyffmpeg in a submodule, which is then imported by yet another submodule. I'm getting the following error when I run the script (both from my entire package, and in the Python shell directly, and on two different devices with two different OSes) :

  


  This is the error I get from the shell on my MacBook :

  


  Traceback (most recent call last):&#xA;  File "<stdin>", line 1, in <module>&#xA;  File "/path/to/venv/lib/python3.11/site-packages/pyffmpeg/__init__.py", line 163, in convert&#xA;    raise Exception(self.error)&#xA;Exception&#xA;</module></stdin>

  


  And this is the error I get on my Raspberry Pi when I run the full program :

  


    File "/path/to/venv/lib/python3.11/site-packages/pyffmpeg/__init__.py", line 154, in convert
    if 'Output #0' not in stderr:
                          ^^^^^^
UnboundLocalError: cannot access local variable 'stderr' where it is not associated with a value


  


  I've tracked down the relevant code in the __init__.py file of pyffmpeg, but I'm not sure how to fix the problem.

  


          if 'Output #0' not in stderr:
            lines = stderr.splitlines()
            if len(lines) > 0:
                self.error = lines[-1]
            else:
                self.error = ""

            if self.enable_log:
                self.logger.error(self.error)
            raise Exception(self.error)
        else:
            self.error = ''
            if self.enable_log:
                self.logger.info('Conversion Done')
        return out


  


  Anyone have any ideas ?