11
votes
Using ffmpeg to cut up video
use this format:
ffmpeg <start time> <input file> <cut duration> <out file>
eg. cut 60 second clip after 1 minute of video
ffmpeg.exe -ss 00:01:00 -i "in file.mp4" ...
- 1,181
8
votes
Rotate a MP4 file, while preserving codec and quality attributes
If you actually recorded video in landscape mode, but phone erroneously saved in metadata that it is 90 degrees rotated (it happen to me today during helicopter flight) just download ffmpeg and use ...
- 615
5
votes
Using ffmpeg to cut up video
As with user225366, the -t option doesn't work for short videos, but it does for longer videos. For short videos it seems that -frames:v is better. This is what worked for me.
ffmpeg -ss 4 -i input....
- 181
5
votes
How to extract image from PDF file
Sumatra PDF is a fast and lightweight open source PDF reader that can copy images directly to clipboard, without any re-rasterization.
- 241
4
votes
How can I change all pixels of one color to another color in a picture?
The free (gratis) tool IrfanView has a tool do do this, and it will even do Batch processing (several files, or an entire folder, at once).
Go to File: Batch Conversion, then hit Advanced, then "...
- 310
4
votes
Using ffmpeg to cut up video
I see not many mention this (I'm no expert so maybe there is a catch), but if your file has other streams like subtitles and other metadata like chapters and so on, it's possible to cut/trim and keep ...
- 471
2
votes
How to extract image from PDF file
use pdftocairo from poppler toolkit. It can extract and convert images of pdf to any desired format. It always generate images and never generate ppm or some craps like that. Following command covert ...
- 208
1
vote
How much RAM to add t i3-6100 processor to fasten speed?
Adding an extra RAM will almost certainly speed your system up. Opening large files, video editing and Chrome use a lot of RAM. 16GB is pretty standard today and 8GB is the minimum I'd go for.
It's ...
- 363
1
vote
Does running large file compression on SSD go faster than on HDD?
SSD to SSD will be fastest.
HDD to SSD will be usually be second - hdd reads are faster then writes but if you are compressing to more then about 5 times the reverse may be true (exact ratio depends ...
- 71.4k
1
vote
Performance difference between Intel Core i3, i5 and i7
There are 3 major differences:
the number of cores
the number of threads
the cache size
Frequencies have a very wide range for each model, to cover a lot of market segments.
Also, i3s do not ...
- 10.2k
1
vote
Performance difference between Intel Core i3, i5 and i7
Core i7s are better than Core i5s, and Core i5s are better than Core i3s. The main reason here being performance. In general, Core i3 chips are found in budget PCs and low-end laptops. For a normal ...
- 11
1
vote
Using ffmpeg to cut up video
Building on top of already great answers. What is missing there is preservation of metadata.
I am using following script to cut_video, which also preserves metadata:
#!/usr/bin/env bash
INPUT="$...
- 2,684
1
vote
How to extract image from PDF file
Some recent comparative observations based on common suggestions.
A large number of images embedded in a PDF are manipulated on insert or extract. Except for DCT compressed images (which are normally ...
- 815
1
vote
How can I easily correct slight rotational misalignment in scanned images
You can use package deskew in python.
Install the packege
pip install deskew
Use it
import numpy as np
import skimage
import deskew
image = skimage.io.imread('input.jpg')
grayscale = skimage....
- 111
1
vote
How to automate photoshop from the command line
Actually, you can do this very easy in Photoshop with the creation of small executable tasks that run Photoshop macros (actions). This is called a Photoshop Droplet
http://www.dummies.com/software/...
- 111
1
vote
How do I batch change the date taken information in EXIF data?
Set to oldest date from Exif meta or file name
Step 0 - install exiftool from below
Installing ExifTool
👉 Step 0.1
Save the oldest_datetime_config in the home folder C:\Users\YOURUSERNAME or in your ...
- 111
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