Is it possible somehow to access how much of the file is already read so I could hook

Currently, it is not possible. <a class="user-mention notranslate" data-hovercard-type

Progress bar for `parse_speed=1`? about pymediainfo HOT 4 OPEN

pcroland commented on September 25, 2024

Progress bar for `parse_speed=1`?

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sbraz commented on September 25, 2024

Currently, it is not possible. @JeromeMartinez, any idea how we could implement this? Is there some way to connect a callback function?

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JeromeMartinez commented on September 25, 2024

No callback function (yet), we have a callback function feature but there is no callback for a progress bar yet.
We have MediaInfo::State_Get(), value is between 0 and 10000, but you need a separate thread for probing the value.

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pcroland commented on September 25, 2024

Could I pipe the file through something that can read how many bytes has been read?

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sbraz commented on September 25, 2024

Yes, the parse method accepts a file-like object so you could create a file-like object that does something every time its read() method is called.
Please take a look at the code if you want to understand how pymediainfo handles file-like objects:

pymediainfo/pymediainfo/__init__.py

Lines 460 to 488 in 5ccb770

 try: 

 filename.seek(0, 2) 

 file_size = filename.tell() 

 filename.seek(0) 

 except AttributeError: # filename is not a file-like object 

 file_size = None 

 if file_size is not None: # We have a file-like object, use the buffer protocol: 

 # Some file-like objects do not have a mode 

 if "b" not in getattr(filename, "mode", "b"): 

 raise ValueError("File should be opened in binary mode") 

 lib.MediaInfo_Open_Buffer_Init(handle, file_size, 0) 

 while True: 

 buffer = filename.read(buffer_size) 

 if buffer: 

 # https://github.com/MediaArea/MediaInfoLib/blob/v20.09/Source/MediaInfo/File__Analyze.h#L1429 

 # 4th bit = finished 

 if lib.MediaInfo_Open_Buffer_Continue(handle, buffer, len(buffer)) & 0x08: 

 break 

 # Ask MediaInfo if we need to seek 

 seek = lib.MediaInfo_Open_Buffer_Continue_GoTo_Get(handle) 

 # https://github.com/MediaArea/MediaInfoLib/blob/v20.09/Source/MediaInfoDLL/MediaInfoJNI.cpp#L127 

 if seek != ctypes.c_uint64(-1).value: 

 filename.seek(seek) 

 # Inform MediaInfo we have sought 

 lib.MediaInfo_Open_Buffer_Init(handle, file_size, filename.tell()) 

 else: 

 break 

 lib.MediaInfo_Open_Buffer_Finalize(handle)

On a side note, I just noticed that pymediainfo only seems to support seekable objects, so I created #132.

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Progress bar for `parse_speed=1`? about pymediainfo HOT 4 OPEN

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	try:
	filename.seek(0, 2)
	file_size = filename.tell()
	filename.seek(0)
	except AttributeError: # filename is not a file-like object
	file_size = None

	if file_size is not None: # We have a file-like object, use the buffer protocol:
	# Some file-like objects do not have a mode
	if "b" not in getattr(filename, "mode", "b"):
	raise ValueError("File should be opened in binary mode")
	lib.MediaInfo_Open_Buffer_Init(handle, file_size, 0)
	while True:
	buffer = filename.read(buffer_size)
	if buffer:
	# https://github.com/MediaArea/MediaInfoLib/blob/v20.09/Source/MediaInfo/File__Analyze.h#L1429
	# 4th bit = finished
	if lib.MediaInfo_Open_Buffer_Continue(handle, buffer, len(buffer)) & 0x08:
	break
	# Ask MediaInfo if we need to seek
	seek = lib.MediaInfo_Open_Buffer_Continue_GoTo_Get(handle)
	# https://github.com/MediaArea/MediaInfoLib/blob/v20.09/Source/MediaInfoDLL/MediaInfoJNI.cpp#L127
	if seek != ctypes.c_uint64(-1).value:
	filename.seek(seek)
	# Inform MediaInfo we have sought
	lib.MediaInfo_Open_Buffer_Init(handle, file_size, filename.tell())
	else:
	break
	lib.MediaInfo_Open_Buffer_Finalize(handle)