Download chunk file
Author: m | 2025-04-25
Download file in chunks. 0. HttpWebRequest - sending file by chunks and tracking progress. 4. Download large file in small chunks in C. 6. Download file in chunks (Windows C WebStream seek to download a File in Chunks 1 Download file in chunks. Related questions. 10 How to programmatically download a large file in C. 4 C WebStream seek to download a File in Chunks 1 Download file in chunks. 4
Downloading a file in chunks - is there an optimal sized chunk?
Making it a valuable tool for any Python developer.Example 1: Streaming Large Binary File with urllib2 to FileHere’s an example of how to use urllib2 in Python 3 to stream a large binary file and save it to a local file:import urllib.requestdef download_file(url, file_path): with urllib.request.urlopen(url) as response: with open(file_path, 'wb') as file: while True: chunk = response.read(1024) if not chunk: break file.write(chunk)url = ' = 'downloaded_file.bin'download_file(url, file_path)In this example, the download_file function takes a URL and a file path as input. It uses urllib.request.urlopen to open the URL and then reads the response in chunks of 1024 bytes. The chunks are then written to the local file using open with the 'wb' mode, which allows writing binary data.Example 2: Streaming Large Binary File with Progress BarIf you want to add a progress bar to the previous example to track the download progress, you can use the tqdm library:import urllib.requestfrom tqdm import tqdmdef download_file_with_progress(url, file_path): with urllib.request.urlopen(url) as response: file_size = int(response.headers['Content-Length']) with tqdm(total=file_size, unit='B', unit_scale=True) as pbar: with open(file_path, 'wb') as file: while True: chunk = response.read(1024) if not chunk: break file.write(chunk) pbar.update(len(chunk))url = ' = 'downloaded_file.bin'download_file_with_progress(url, file_path)In this example, we added the tqdm library to create a progress bar. We first get the total file size from the response headers using response.headers['Content-Length']. Then, we use tqdm to create a progress bar with the total file size as the target. Inside the loop, we update the progress bar with the length of each chunk read.ConclusionStreaming large binary files with
How to download a m3u8 video file chunk by chunk?
Set a chunk_size variable to determine the size of each chunk we want to read from the response. In this example, we use a chunk size of 4096 bytes, but you can adjust this value based on your specific requirements.We then enter a loop where we continuously read chunks of data from the response using the read method. If the chunk is empty, it means we have reached the end of the file, and we break out of the loop. Otherwise, we write the chunk to the output file using the write method.Finally, we close both the response and the output file using the with statement, which ensures that the resources are properly released.Usage ExampleNow that we have our stream_large_file function defined, let’s see how we can use it to stream a large binary file from a URL to a local file:url = ' = 'output.bin'stream_large_file(url, output_file)In the above example, we specify the URL of the large binary file we want to stream and the path to the output file. We then call the stream_large_file function with these parameters to start the streaming process. The function will download the file in chunks and save it to the specified output file.Streaming large binary files with urllib2 in Python 3 is a straightforward process that allows us to efficiently download and save files from the web. By reading the file in chunks, we can reduce memory usage and improve overall performance. The urllib2 library provides a convenient interface for handling web requests,javascript - Is it possible to download file chunk by chunk without
AIFF MP3 Converter converts AIFC to WAV. It's an ALL-IN-ONE audio converter that supports more than 100 audio and video files. The software also supports batch conversion, and is full compatible with Windows 10/8/7/Vista/XP/2000.Free Download AIFF MP3 ConverterInstall the Software by Step-by-step InstructionsLaunch AIFF MP3 ConverterChoose AIFC FilesClick "Add Files" to choose AIFC files and add them to conversion list.Choose one or more AIFC files you want to convert and then click Open.Choose Target File FormatChoose "to WAV" Convert AIFC to WAVClick "Convert" to convert all AIFC files to WAV format.The software is converting AIFC files to WAV format.Play & BrowseWhen conversion completes, you can right-click converted item and choose "Play Destination" to play the destination file; or choose "Browse Destination Folder" to open Windows Explorer to browse the destination file.Top What is AIFC?AIFC stands for Compressed Audio Interchange File. Compressed .AIFF audio file that contains CD-quality audio; similar to a .WAV file, but uses audio compression to reduce file size; may incorporate ULAW, ALAW, or G722 compression; commonly referred to as an AIFF-C file.AIFF-C is being defined because AIFF does not allow for compressed audio data. AIFF-C adds the ability to store compressed audio data in a standard manner. Naturally, AIFF-C also allows the storage of uncompressed audio data. The "C" in AIFF-C signifies its extension to handle compressed audio data.The differences between the original AIFF and AIFF-C were kept to a minimum. Applications which currently support AIFF should be easily upgradable to AIFF-C.The following changes have been made from AIFF:The FORM identifier was changed from 'AIFF' to 'AIFC'. This distinguishes AIFF-C files from AIFF files. Existing AIFF programs, until they are upgraded, will simply ignore AIFF-C files.The Common Chunk has been extended to include a compression type ID and a compression type name. AIFF-C is thus capable of storing compressed audio data generated from any compression algorithms.The Sound Data Chunk can contain compressed audio data. The Chunk format has not been modified.The Sound Accelerator (Saxel) Chunk is new. It is designed to eliminate initial artifacts caused by the de-compression algorithms when playback begins at a random point defined by a Marker.The Format Version Chunk is new. This Chunk is designed to provide a smooth transition for potential future upgrades to the AIFF-C specification.What is WAV?WAV (or WAVE), short for Waveform audio format, is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs. It is a variant of the RIFF bitstream format method for storing data in "chunks", and thus also close to the IFF and the AIFF format used on Amiga and Macintosh computers, respectively. It is the main format used on Windows systems for raw and typically uncompressed audio. The default. Download file in chunks. 0. HttpWebRequest - sending file by chunks and tracking progress. 4. Download large file in small chunks in C. 6. Download file in chunks (WindowsDownload large file chunk by chunk with php curl
Over 100mbps.Newsbin uses a "Chunk Cache" which you set with "ChunkCacheSize" in the [Performance] section of the Newsbin Configuration File. The default name is newsbin.nbi.On Usenet, each file is split into many parts (we call them chunks for discussion). Each part of the file is downloaded to a block in the chunk cache. If Newsbin runs out of Chunk Cache, some of the cache is written to disk to make room for new chunks. When Newsbin assembles a file from chunks it checks memory and disk for the chunks. The ChunkCacheSize isn't in bytes, it's the number of blocks of data to store in memory. Each memory block is between 200KB to 1MB in size and varies depending on the size the original poster chose to split up the parts of the file.When you close Newsbin while downloads are still active, Newsbin will write all the chunks in cache out to disk and then exit. When you start Newsbin again, it'll pick up where it left off without having to re-download all those chunks.In the case of incomplete files, the chunks for the files remain in memory because the file isn't complete. When new chunks for new files download, these new chunks will push the old chunks out to disk. Normally when a complete file downloads and is assembled, all the memory blocks are returned to the chunk cache for re-use.Eventually, if Newsbin has enough of the files to repair, it'll assemble and repair these files. If the missing partsDownload a file in chunks concurrently
Options: -N, --concurrent-fragments N Number of fragments of a dash/hlsnative video that should be downloaded concurrently (default is 1) -r, --limit-rate RATE Maximum download rate in bytes per second (e.g. 50K or 4.2M) --throttled-rate RATE Minimum download rate in bytes per second below which throttling is assumed and the video data is re-extracted (e.g. 100K) -R, --retries RETRIES Number of retries (default is 10), or "infinite" --file-access-retries RETRIES Number of times to retry on file access error (default is 10), or "infinite" --fragment-retries RETRIES Number of retries for a fragment (default is 10), or "infinite" (DASH, hlsnative and ISM) --skip-unavailable-fragments Skip unavailable fragments for DASH, hlsnative and ISM (default) (Alias: --no-abort-on- unavailable-fragment) --abort-on-unavailable-fragment * Abort downloading if a fragment is unavailable* (Alias: --no-skip-unavailable-fragments) --keep-fragments Keep downloaded fragments on disk after downloading is finished --no-keep-fragments Delete downloaded fragments after downloading is finished (default) --buffer-size SIZE Size of download buffer (e.g. 1024 or 16K) (default is 1024) --resize-buffer The buffer size is automatically resized from an initial value of --buffer-size (default) --no-resize-buffer Do not automatically adjust the buffer size --http-chunk-size SIZE Size of a chunk for chunk-based HTTP downloading (e.g. 10485760 or 10M) (default is disabled). May be useful for bypassing bandwidth throttling imposed by a webserver (experimental) --playlist-reverse Download playlist videos in reverse order --no-playlist-reverse Download playlist videos in default order (default) --playlist-random Download playlist videos in random order --xattr-set-filesize Set file xattribute ytdl.filesize with expected file size --hls-use-mpegts Use the mpegts container for HLS videos; allowing some players to playangularjs - how to download large files chunk by chunk using
Do not download any videos larger than SIZE (e.g. 50k or 44.6m)--date DATE Download only videos uploaded in this date--datebefore DATE Download only videos uploaded on or before this date (i.e. inclusive)--dateafter DATE Download only videos uploaded on or after this date (i.e. inclusive)--min-views COUNT Do not download any videos with less than COUNT views--max-views COUNT Do not download any videos with more than COUNT views--match-filter FILTER Generic video filter. Specify any key (see the "OUTPUT TEMPLATE" for a list of available keys) to match if the key is present, !key to check if the key is not present, key > NUMBER (like "comment_count > 12", also works with >=, 100 & dislike_count Download Options:-r, --limit-rate RATE Maximum download rate in bytes per second (e.g. 50K or 4.2M)-R, --retries RETRIES Number of retries (default is 10), or "infinite".--fragment-retries RETRIES Number of retries for a fragment (default is 10), or "infinite" (DASH, hlsnative and ISM)--skip-unavailable-fragments Skip unavailable fragments (DASH, hlsnative and ISM)--abort-on-unavailable-fragment Abort downloading when some fragment is not available--keep-fragments Keep downloaded fragments on disk after downloading is finished; fragments are erased by default--buffer-size SIZE Size of download buffer (e.g. 1024 or 16K) (default is 1024)--no-resize-buffer Do not automatically adjust the buffer size. By default, the buffer size is automatically resized from an initial value of SIZE.--http-chunk-size SIZE Size of a chunk for chunk-based HTTP downloading (e.g. 10485760 or 10M) (default is disabled). May be useful for bypassing bandwidth throttling imposed by a webserver (experimental)--playlist-reverse Download playlist videos in reverse order--playlist-random Download playlist videos in random order--xattr-set-filesize Set file xattribute ytdl.filesize with expected file size--hls-prefer-native Use the native HLS downloader instead of ffmpeg--hls-prefer-ffmpeg Use ffmpeg instead of the native HLS downloader--hls-use-mpegts Use the mpegts container for HLS videos, allowing to play the video while downloading (some players may not be able to play it)--external-downloader COMMAND Use the specified external downloader. Currently supports aria2c,avconv,axel,curl,ffmpeg,httpie,wget--external-downloader-args ARGS Give these arguments to the external downloaderFilesystem Options:-a, --batch-file FILE File containing URLs to download ('-' for stdin), one URL per line. Lines starting with '#', ';' or ']' are considered as comments and ignored.--id Use only video ID in file name-o, --output TEMPLATE Output filename template, see the "OUTPUT TEMPLATE" for all the info--autonumber-start NUMBER Specify the start value for %(autonumber)s (default is 1)--restrict-filenames Restrict filenames to only ASCII characters, and avoid "&" and spaces in filenames-w, --no-overwrites Do not overwrite files-c, --continue Force resume of. Download file in chunks. 0. HttpWebRequest - sending file by chunks and tracking progress. 4. Download large file in small chunks in C. 6. Download file in chunks (Windows C WebStream seek to download a File in Chunks 1 Download file in chunks. Related questions. 10 How to programmatically download a large file in C. 4 C WebStream seek to download a File in Chunks 1 Download file in chunks. 4Comments
Making it a valuable tool for any Python developer.Example 1: Streaming Large Binary File with urllib2 to FileHere’s an example of how to use urllib2 in Python 3 to stream a large binary file and save it to a local file:import urllib.requestdef download_file(url, file_path): with urllib.request.urlopen(url) as response: with open(file_path, 'wb') as file: while True: chunk = response.read(1024) if not chunk: break file.write(chunk)url = ' = 'downloaded_file.bin'download_file(url, file_path)In this example, the download_file function takes a URL and a file path as input. It uses urllib.request.urlopen to open the URL and then reads the response in chunks of 1024 bytes. The chunks are then written to the local file using open with the 'wb' mode, which allows writing binary data.Example 2: Streaming Large Binary File with Progress BarIf you want to add a progress bar to the previous example to track the download progress, you can use the tqdm library:import urllib.requestfrom tqdm import tqdmdef download_file_with_progress(url, file_path): with urllib.request.urlopen(url) as response: file_size = int(response.headers['Content-Length']) with tqdm(total=file_size, unit='B', unit_scale=True) as pbar: with open(file_path, 'wb') as file: while True: chunk = response.read(1024) if not chunk: break file.write(chunk) pbar.update(len(chunk))url = ' = 'downloaded_file.bin'download_file_with_progress(url, file_path)In this example, we added the tqdm library to create a progress bar. We first get the total file size from the response headers using response.headers['Content-Length']. Then, we use tqdm to create a progress bar with the total file size as the target. Inside the loop, we update the progress bar with the length of each chunk read.ConclusionStreaming large binary files with
2025-04-21Set a chunk_size variable to determine the size of each chunk we want to read from the response. In this example, we use a chunk size of 4096 bytes, but you can adjust this value based on your specific requirements.We then enter a loop where we continuously read chunks of data from the response using the read method. If the chunk is empty, it means we have reached the end of the file, and we break out of the loop. Otherwise, we write the chunk to the output file using the write method.Finally, we close both the response and the output file using the with statement, which ensures that the resources are properly released.Usage ExampleNow that we have our stream_large_file function defined, let’s see how we can use it to stream a large binary file from a URL to a local file:url = ' = 'output.bin'stream_large_file(url, output_file)In the above example, we specify the URL of the large binary file we want to stream and the path to the output file. We then call the stream_large_file function with these parameters to start the streaming process. The function will download the file in chunks and save it to the specified output file.Streaming large binary files with urllib2 in Python 3 is a straightforward process that allows us to efficiently download and save files from the web. By reading the file in chunks, we can reduce memory usage and improve overall performance. The urllib2 library provides a convenient interface for handling web requests,
2025-04-18Over 100mbps.Newsbin uses a "Chunk Cache" which you set with "ChunkCacheSize" in the [Performance] section of the Newsbin Configuration File. The default name is newsbin.nbi.On Usenet, each file is split into many parts (we call them chunks for discussion). Each part of the file is downloaded to a block in the chunk cache. If Newsbin runs out of Chunk Cache, some of the cache is written to disk to make room for new chunks. When Newsbin assembles a file from chunks it checks memory and disk for the chunks. The ChunkCacheSize isn't in bytes, it's the number of blocks of data to store in memory. Each memory block is between 200KB to 1MB in size and varies depending on the size the original poster chose to split up the parts of the file.When you close Newsbin while downloads are still active, Newsbin will write all the chunks in cache out to disk and then exit. When you start Newsbin again, it'll pick up where it left off without having to re-download all those chunks.In the case of incomplete files, the chunks for the files remain in memory because the file isn't complete. When new chunks for new files download, these new chunks will push the old chunks out to disk. Normally when a complete file downloads and is assembled, all the memory blocks are returned to the chunk cache for re-use.Eventually, if Newsbin has enough of the files to repair, it'll assemble and repair these files. If the missing parts
2025-04-17Options: -N, --concurrent-fragments N Number of fragments of a dash/hlsnative video that should be downloaded concurrently (default is 1) -r, --limit-rate RATE Maximum download rate in bytes per second (e.g. 50K or 4.2M) --throttled-rate RATE Minimum download rate in bytes per second below which throttling is assumed and the video data is re-extracted (e.g. 100K) -R, --retries RETRIES Number of retries (default is 10), or "infinite" --file-access-retries RETRIES Number of times to retry on file access error (default is 10), or "infinite" --fragment-retries RETRIES Number of retries for a fragment (default is 10), or "infinite" (DASH, hlsnative and ISM) --skip-unavailable-fragments Skip unavailable fragments for DASH, hlsnative and ISM (default) (Alias: --no-abort-on- unavailable-fragment) --abort-on-unavailable-fragment * Abort downloading if a fragment is unavailable* (Alias: --no-skip-unavailable-fragments) --keep-fragments Keep downloaded fragments on disk after downloading is finished --no-keep-fragments Delete downloaded fragments after downloading is finished (default) --buffer-size SIZE Size of download buffer (e.g. 1024 or 16K) (default is 1024) --resize-buffer The buffer size is automatically resized from an initial value of --buffer-size (default) --no-resize-buffer Do not automatically adjust the buffer size --http-chunk-size SIZE Size of a chunk for chunk-based HTTP downloading (e.g. 10485760 or 10M) (default is disabled). May be useful for bypassing bandwidth throttling imposed by a webserver (experimental) --playlist-reverse Download playlist videos in reverse order --no-playlist-reverse Download playlist videos in default order (default) --playlist-random Download playlist videos in random order --xattr-set-filesize Set file xattribute ytdl.filesize with expected file size --hls-use-mpegts Use the mpegts container for HLS videos; allowing some players to play
2025-04-14""" The script contains example of the paramiko usage for large file downloading. It implements :func:`download` with limited number of concurrent requests to server, whereas paramiko implementation of the :meth:`paramiko.SFTPClient.getfo` send read requests without limitations, that can cause problems if large file is being downloaded. """ import logging import os import typing from os.path import join, dirname from paramiko import SFTPClient, SFTPFile, Message, SFTPError, Transport from paramiko.sftp import CMD_STATUS, CMD_READ, CMD_DATA logger = logging.getLogger('demo') class _SFTPFileDownloader: """ Helper class to download large file with paramiko sftp client with limited number of concurrent requests. """ _DOWNLOAD_MAX_REQUESTS = 48 _DOWNLOAD_MAX_CHUNK_SIZE = 0x8000 def __init__(self, f_in: SFTPFile, f_out: typing.BinaryIO, callback=None): self.f_in = f_in self.f_out = f_out self.callback = callback self.requested_chunks = {} self.received_chunks = {} self.saved_exception = None def download(self): file_size = self.f_in.stat().st_size requested_size = 0 received_size = 0 while True: # send read requests while len(self.requested_chunks) + len(self.received_chunks) self._DOWNLOAD_MAX_REQUESTS and \ requested_size file_size: chunk_size = min(self._DOWNLOAD_MAX_CHUNK_SIZE, file_size - requested_size) request_id = self._sftp_async_read_request( fileobj=self, file_handle=self.f_in.handle, offset=requested_size, size=chunk_size ) self.requested_chunks[request_id] = (requested_size, chunk_size) requested_size += chunk_size # receive blocks if they are available # note: the _async_response is invoked self.f_in.sftp._read_response() self._check_exception() # write received data to output stream while True: chunk = self.received_chunks.pop(received_size, None) if chunk is None: break _, chunk_size, chunk_data = chunk self.f_out.write(chunk_data) if self.callback is not None: self.callback(chunk_data) received_size += chunk_size # check transfer status if received_size >= file_size: break # check chunks queues if not self.requested_chunks and len(self.received_chunks) >= self._DOWNLOAD_MAX_REQUESTS: raise ValueError("SFTP communication error. The queue with requested file chunks is empty and" "the received chunks queue is full and cannot be consumed.") return received_size def _sftp_async_read_request(self, fileobj, file_handle, offset, size): sftp_client = self.f_in.sftp with sftp_client._lock: num = sftp_client.request_number msg = Message() msg.add_int(num) msg.add_string(file_handle) msg.add_int64(offset) msg.add_int(size) sftp_client._expecting[num] = fileobj sftp_client.request_number += 1 sftp_client._send_packet(CMD_READ, msg) return num def _async_response(self, t, msg, num): if t == CMD_STATUS: # save exception and re-raise it on next file operation try: self.f_in.sftp._convert_status(msg) except Exception as e: self.saved_exception = e return if t != CMD_DATA: raise SFTPError("Expected data") data = msg.get_string() chunk_data = self.requested_chunks.pop(num, None) if chunk_data is None: return # save chunk offset, size = chunk_data if size != len(data): raise SFTPError(f"Invalid data block size. Expected {size} bytes, but it has {len(data)} size") self.received_chunks[offset] = (offset, size, data) def _check_exception(self): """if there's a saved exception, raise & clear it""" if self.saved_exception is not None: x = self.saved_exception self.saved_exception = None raise x def download_file(sftp_client: SFTPClient, remote_path: str, local_path: str, callback=None): """ Helper function to download remote file via sftp. It contains a fix for a bug that prevents a large file downloading with :meth:`paramiko.SFTPClient.get` Note: this function relies on some private paramiko API and has been tested with paramiko 2.7.1. So it may not work
2025-04-16Streaming large binary files over the internet can be a challenging task, especially when dealing with limited memory resources. However, Python provides a powerful library called urllib2 that allows us to easily download and stream files from the web. In this article, we will explore how to use urllib2 to stream large binary files to a local file in Python 3.Understanding urllib2urllib2 is a Python library that provides a high-level interface for fetching data from URLs. It supports various protocols such as HTTP, HTTPS, and FTP, making it a versatile tool for web scraping and file downloading. In Python 3, urllib2 has been split into two separate modules: urllib.request and urllib.error. We will be using the urllib.request module for our file streaming task.Streaming Large Binary FilesWhen dealing with large binary files, it is important to stream the data instead of loading it all into memory at once. This allows us to process the file in chunks, reducing memory usage and improving performance. To stream a large binary file using urllib2, we can follow these steps:import urllib.requestdef stream_large_file(url, output_file): with urllib.request.urlopen(url) as response, open(output_file, 'wb') as file: chunk_size = 4096 while True: chunk = response.read(chunk_size) if not chunk: break file.write(chunk)In the above code snippet, we define a function called stream_large_file that takes in a URL and an output file path. We then use the urlopen function from urllib.request to open the URL and obtain a file-like object. We also open the output file in binary write mode using the open function.We
2025-04-08