I upgraded my iPhone 5s to iOS 10 and could no longer retrieve photos from it. This was unacceptable for me so I worked at achieving retrieving my photos. This document is my story (on Ubuntu 16.04).
The solution is to compile libimobiledevice and ifuse from source.
Who is this guide intended for?
Spawning multiple ffmpeg processes with xargs:
On standard NVIDIA GPUs (Not the Quadros and Tesla lines), NVENC encodes are limited to two simultaneous sessions. The sample below illustrates how to pass a list of AVI files to ffmpeg and encode them to HEVC on two encode sessions:
$ find Videos/ -type f -name \*.avi -print | sed 's/.avi$//' |\
xargs -n 1 -I@ -P 2 ffmpeg -i "@.avi" -c:a aac -c:v hevc_nvenc "@.mp4"
This will find all files with the ending .avi in the directory Videos/ and transcode them into HEVC/H265+AAC files with the ending .mp4. The noteworthy part here is the -P 2 to xargs, which starts up to two processes in parallel.
Transcoding FLAC music to Opus:
ffmpeg is a highly useful application for converting music and videos. However, audio transcoding is limited to a a single core. If you have a large FLAC archive and you wanted to compress it into the efficient Opus codec, it would take forever with the fastest processor to complete, unless you were to take advantage of all cores in your CPU.
parallel 'ffmpeg -v 0 -i "{}" -c:a libopus -b:a 128k "{.}.opus"' ::: $(find -type f -name '*.flac')
Transcoding Videos to VP9:
Quickly check for supported NVENC and NPP hardware acceleration capabilities in FFmpeg on your platform:
Depending on how you built ffmpeg, you may want to check the supported NVENC-based hardware acceleration capabilities in ffmpeg by running:
$ for i in encoders decoders filters; do
echo $i:; ffmpeg -hide_banner -${i} | egrep -i "npp|cuvid|nvenc|cuda|nvdec"
done
Sample output (as on my testbed):
| #!/bin/bash | |
| USER=${1:-sebble} | |
| STARS=$(curl -sI https://api.github.com/users/$USER/starred?per_page=1|egrep '^Link'|egrep -o 'page=[0-9]+'|tail -1|cut -c6-) | |
| PAGES=$((658/100+1)) | |
| echo You have $STARS starred repositories. | |
| echo |
| import os | |
| import io | |
| from gzip import GzipFile | |
| from urllib.parse import urlparse | |
| import requests | |
| import boto3 | |
| # ~18.4MB compressed |
| 1 - Install Home Brew. | |
| /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" | |
| 2 - Install aircrack-ng: | |
| brew install aircrack-ng | |
| 3 - Install the latest Xcode, with the Command Line Tools. | |
| //Create the following symlink: | |
| sudo ln -s /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport /usr/local/bin/airport//Figure out which channel you need to sniff: |
| #!/usr/local/bin/python3 | |
| import logging, select, subprocess | |
| LOG_FILE = "test.log" | |
| logger = logging.getLogger(__name__) | |
| logging.basicConfig(level=logging.INFO,filename=LOG_FILE,format='%(asctime)s - %(name)s - %(levelname)s - %(message)s') | |
| def logging_call(popenargs, **kwargs): | |
| process = subprocess.Popen(popenargs, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) |
