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• Native function in Vitamio

  1er août 2014, par hclee

  I am now looking the code beind the Vitamio (media framework) cause I want to know what API does it use to retrieve the buffer percentage/download rate and how it interect with the android OS to retrieve other information about the streaming video.

  But I realized that it does use some native functions which enable it use some code written in C/C++ language.

  I try to investigate on the C++ code but I don’t know where are they.
  I guessed they are stored inside the res/raw/librarm.so.
  I unzipped the file but all I can find is some machine code but what I want is the implementation of the native function.

  For example, I want to know the implementation of the following function :

  public native int getVideoTrack() ; // What is this function for ? What does it mean by the track
  // number of a straming video ?

  or

  private static native boolean loadFFmpeg_native(String ffmpegPath) ;

  and when will this function be called :

  private static void postEventFromNative(Object mediaplayer_ref, int what, int arg1, int arg2, Object obj)

  Do anyone know where can I investigate the implementation of such native function.
  It should be some C++ code but I don’t want machine code...

  I went to
  https://www.vitamio.org/en/2013/Tutorial_0509/13.html

  but they didn’t have the thing that I want

  Thanks in advance !!!

• asyncio.create_subprocess_shell error : Future exception was never retrieved - BrokenPipeError

  10 juin 2021, par Abdelmalek

  Whenever I use asyncio.create_subprocess_shell() with sp.communicate() I get this error at the end of my program.

  


  If I run multiple suprocesses using asyncio, the error would be print at the end for each one of them.

  


  Aulthough it doesn't affect my program, I want to find the source and fix the issue. Thanks for the help !

  


  Traceback :

  


  Future exception was never retrieved&#xA;future: <future finished="finished" exception="BrokenPipeError(32," pipe="pipe" has="has" been="been">&#xA;Traceback (most recent call last):&#xA;  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\asyncio\subprocess.py", line 153, in _feed_stdin&#xA;    await self.stdin.drain()&#xA;  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\asyncio\streams.py", line 387, in drain&#xA;    await self._protocol._drain_helper()&#xA;  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\asyncio\streams.py", line 197, in _drain_helper&#xA;    await waiter&#xA;  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 379, in _loop_writing&#xA;    f.result()&#xA;  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\asyncio\windows_events.py", line 812, in _poll&#xA;    value = callback(transferred, key, ov)&#xA;  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\asyncio\windows_events.py", line 538, in finish_send&#xA;    return ov.getresult()&#xA;BrokenPipeError: [WinError 109] The pipe has been ended&#xA;</future>

  


  Code :

  


  async def get(cs, url):
    async with cs.get(url) as r:
        b = b''
        while True:
            chunk = await r.content.read(4000000)
            b += chunk
            if not chunk:
                break
        
        if int(r.headers['content-length']) < 8000000:
            result = BytesIO(b)
            return [result, 'full']
        else:
            command = f"ffmpeg -y -i - -c:v copy -fs 8000000 -f matroska -"
            sp = await asyncio.create_subprocess_shell(command, stdin=asyncio.subprocess.PIPE,
                stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE)
            stdout, stderr = await sp.communicate(b)
            sp.wait()

            print(stderr.decode())
            print(len(stdout))
            output = str(stderr)
            index_d = output.find('Duration: ')
            index_t = output.rfind('time=')
            duration = await get_sec(output[index_d + 10:].split(",")[0])
            time_ = await get_sec(output[index_t + 5:].split(" ")[0])
            percentage = f"{round((time_ / duration) * 100)}%"

            result = BytesIO(stdout)
            return [result, 'preview', percentage]

async def main(urls):
    async with aiohttp.ClientSession() as cs:
            
        tasks = []
        for url in urls:
            task = asyncio.create_task(get(cs, url))
            tasks.append(task)
        
        results = []
        for task in tasks:
            result = await task
            results.append(result)
        
        return results

loop = asyncio.get_event_loop()
results = loop.run_until_complete(main(urls))


  


• Anomalie #3177 (Nouveau) : padding auto n’existe pas

  4 mars 2014, par b b

  On a une règle qui tente de coller la valeur auto en tant que padding dans la dist :

  http://zone.spip.org/trac/spip-zone/browser/_core_/plugins/dist/css/layout.css#L73

  Pourtant cette valeur n’est pas reconnue et ne semble pas être "valide", cf :

  padding : [ | ] 1,4

  https://developer.mozilla.org/fr/docs/CSS/padding

  Si ce n’est pas voulu il serait bon supprimer ce padding : auto !important ;