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Hacker Public Radio

Your ideas, projects, opinions - podcasted.

New episodes every weekday Monday through Friday.
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Welcome to HPR, the Community Podcast

We started producing shows as Today with a Techie on 2005-09-19, 18 years, 6 months, 0 days ago. Our shows are produced by listeners like you and can be on any topics that "are of interest to hackers". If you listen to HPR then please consider contributing one show a year. If you record your show now it could be released in 8 days.


Latest Shows


hpr4077 :: FFMPEG Series: Joining and Splitting files

In this episode, I explain how to use FFMGEG to join and split media files

Thumbnail of Mr. Young
Hosted by Mr. Young on 2024-03-19 is flagged as Clean and released under a CC-BY-SA license.
recording, ffmpeg, audio, video. general. (Be the first).

Listen in ogg, spx, or mp3 format. Play now:

Duration: 00:09:22

FFMPEG Series Part 2: Joining and Splitting files

Joining Files

Link: https://trac.ffmpeg.org/wiki/Concatenate

For lossless files of the same codecs

ffmpeg -i "concat:input1.ts|input2.ts|input3.ts" -c copy output.ts

For mp4 files, using intermediate files

ffmpeg -i input1.mp4 -c copy intermediate1.ts
ffmpeg -i input2.mp4 -c copy intermediate2.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy output.ts

Brief explanation of the options used in the command:

  • -i: input
  • -c copy: use codec same codecs as input

Splitting Files

Splitting by Duration:

ffmpeg -i input.mp4 -t 00:05:00 output_part1.mp4
ffmpeg -i input.mp4 -t 00:05:00 -ss 00:05:00 output_part2.mp4

Brief explanation of the options used in the command:

  • -i: Input file
  • -t: Duration of the output file
  • -ss: Start position of the output file (optional)

Splitting by Chapters or Markers:

Use additional scripting to get out chapter marker times, then use above

C. Splitting by Size:

ffmpeg -i input.mp4 -map 0 -c copy -segment_size 50M -segment_times 1 output_%03d.mp4

Brief explanation of the options used in the command:

  • -map 0: Select the first stream (video and audio)
  • -c copy: Copy the stream without re-encoding (faster)
  • -segment_size: Size of each output file segment
  • -segment_times: Number of segments to create
  • output_%03d.mp4: printf-style pattern for the output files

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hpr4076 :: WLED House Lights!

I talk about setting up year around house lights !!

Hosted by operat0r on 2024-03-18 is flagged as Explicit and released under a CC-BY-SA license.
home, house, arduino, lights, xmas, christmas lights. general. (Be the first).

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Duration: 00:34:57

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hpr4075 :: Making a Pomodoro Timer

norrist uses the pomodoro method to keep from getting fired.

Hosted by norrist on 2024-03-15 is flagged as Clean and released under a CC-BY-SA license.
circuit python, productivity. general. 1.

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Duration: 00:19:50

Making a Pomodoro Timer

Slacking Off at work

  • I get distracted Easy
  • My mind drifts if I try to focus on a single task For more than 20-30 Minutes.
  • If I try to fight the urge to just keep working my productivity goes way down.
  • I end up working for a bit, then slacking off for half an hour.
  • I can get more work done If I embrace my limitation and force myself to take a break.

Pomodoro Technique

From Wikipedia https://en.wikipedia.org/wiki/Pomodoro_Technique

The Pomodoro Technique is a time management method developed by Francesco Cirillo in the late 1980s. It uses a kitchen timer to break work into intervals, typically 25 minutes in length, separated by short breaks. Each interval is known as a Pomodoro, from the Italian word for tomato, after the tomato-shaped kitchen timer Cirillo used as a university student.

The Timer

  • There are plenty of Pomodoro Apps I've tried using an app, but I would often forget.
  • I wanted a physical device that was always on by desk and could grab my attention.
  • I looked for a dedicated physical Pomodoro timer, but only found the kitchen timers
  • I decided to make myself a timer using a Circuit Playground Express

Circuit Playground Express

  • In my past episode about using a Pi pico to type passwords I mentioned I owned a playground express.
  • The playground express is a micro controller with a lot of built ins
    • 2 buttons
    • 10 multi color LED
    • ...
  • Runs circuit python with lots of libraries so it is easy to program.

TDD

  • About once every other year I decided to start a project with as much TDD as I can.
  • TDD Basics
    • Write a test BEFORE you write the code
    • Run the test - It will fail
    • Write the simplest code that will pass the test
    • Run the test and make sure it passes
    • Refactor/improve the code if needed.
  • TDD advantages
    • Code is easy to separate into discrete functions
    • Parts of the code can be rewritten without affecting the rest
    • confidence in rewrites

pomodoro.py

  • Circuit python looks for and runs a file named code.py
  • A lot of the circuit Python code has to be run on the micro controller
  • My Developers workstation does not have the LED's or buttons
  • I split the some code into a separate file based on if it could run in "regular" python.
  • I used TDD as much as possible to test the functions in pomodoro.py

code.py

BREAK_MINUTES = 5
WORK_MINUTES = 25
  • Functions that require hardware
  • No tests.
  • counts down and changes color of led
  • minutes divided by number of LED

Using the timer

  • Ready
    • Green Light next to button to start work Period
    • Blue Light next to button to start break Period
  • Working
    • White Background
    • Green progress pixels
  • Break
    • White Background
    • Blue progress pixels
  • Button A
    • Start working
  • Button B
    • Start Break

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hpr4074 :: Jade Empire

My experience playing Jade Empire

Thumbnail of Daniel Persson
Hosted by Daniel Persson on 2024-03-14 is flagged as Clean and released under a CC-BY-SA license.
games, story, experience. general. (Be the first).

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Duration: 00:06:05

I love the story-based games and experiences. Jade Empire is based in the past in China or Japan, and you will be following this martial artist searching for their kidnapped trainer.

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hpr4073 :: Is the 1990 documentary "Cyberpunk" worth watching today?

In which Trixter covers the pros and cons of an old hacker watching old hacker media

Hosted by Trixter on 2024-03-13 is flagged as Explicit and released under a CC-BY-SA license.
cyberpunk, documentary, review. general. 2.

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Duration: 00:06:20

In the podcast episode, I mention my HD restoration on archive.org, however I found an even better restoration on YouTube at https://youtu.be/ZsbMXYigewI for those not allergic to the platform.

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hpr4072 :: Piper text to speech engine

Archer72 talks about Piper TTS using a Piper voice

Thumbnail of Archer72
Hosted by Archer72 on 2024-03-12 is flagged as Clean and released under a CC-BY-SA license.
Piper, TTS, Text to speech, Voice synthesis. Accessibility. (Be the first).

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Duration: 00:06:28

Using Piper

Github

Piper

Piper Github

Thorsten-Voice

Thorsten-Voice Github

README

Piper Github README

Videos

Create your AI digital voice clone locally with Piper TTS | Tutorial

Create voice clone with Piper

Thorsten-Voice

Thorsten Mueller

Voices

Voice repo

Piper voices

Voice sample testing

Voice sample testing

Clone voices

Clone this model repository

Make sure you have git-lfs installed

Git lfs (Large filesystem)

In my case on Fedora 39

sudo dnf install git-lfs | teelog

Aside

I use an alias to create a log file with a date stamp

alias teelog='tee -a ~/logfiles/dump_`date +"%Y-%m-%d_%H%M%S"`.log'
git lfs install
git clone https://huggingface.co/rhasspy/piper-voices

# if you want to clone without large files – just their pointers
# prepend your git clone with the following env var:

GIT_LFS_SKIP_SMUDGE=1

Sample usage

echo 'Welcome to the world of speech synthesis!' | ./piper --model en_US-lessac-medium.onnx --output_file welcome.wav

Usage from a text file

cat sample/hamlet_to_be.txt | piper --model ~/git/piper/etc/test_voice.onnx --output_file hamlet_to-be_piper_sample_voice.wav

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hpr4071 :: Migration to digiKam as Digital Asset Management (DAM)

I describe how I migrated from Adobe Photoshop Elements to digiKam as my photo catalog software.

Hosted by Henrik Hemrin on 2024-03-11 is flagged as Clean and released under a CC-BY-SA license.
photography, photo, digiKam, Digital Asset Management, DAM. general. 1.

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Duration: 00:08:21

I talk about my migration from Adobe Photoshop Elements to digiKam as photo catalog software, or DAM Digital Asset Management as it often is referred to nowadays.

My latest was release 14 which I bought 2015, which also was when I migrated from Windows to macOS.

Photoshop Elements is without hesitation a good software. One major drawback is that is a proprietary software from which I cannot export data on my conditions.

After a few of years on release 14 the geotagging stopped working. The error message told that this was caused by a change by Google. Adobe Photoshop Elements had a fix for this error - but only incorporated in the next release of the software. No fix was planned for my release. So to get geotagging working again, I would have to buy a new release.

I also got problem that it now and then crashed and needed to be restarted. Something needed to be done.

I considered if I should buy a new release of Photoshop Elements or change to any other software. At the same time I also became more attracted to Linux. I also became more interested in free and open software.

A big drawback with changing to something else than Adobe is that I most certainly will loose some of the work I have put into photos in Photoshop Elements.

  1. The Photo editing data and raw conversion settings for individual photos will be lost. This is almost impossible to migrate between software. What can be done is to save what I have edited as new photos. I am fine with this, it will not stop me from changing software.

  2. Meta data is very important to me. Meta data contains not only information about the shooting from the camera itself. But also my tags, description texts and more I had added in Photoshop Elements. Meta data also includes face tagging. This goes both for digital camera photos as well as digitized analog photos.

  • Criteria for my new software:
    1. Preferable free and open source
    2. Available on multiple platforms, in particular available on macOS and Linux
    3. That meta data can be migrated including face tagging

The one that I found to best meet my criteria is digiKam.

DigiKam is mostly known for its catalog capabilities. But digiKam also includes import and export functions as well as raw conversion and photo editing.

My migration.

Photoshop Elements stores the data in a data base. It is possible to export metadata to files and sidecars. But not all data. Face tagging cannot be exported. The name of the person can be exported but not the coordinates of the face tag which only is stored in the data base.

The data base itself cannot be read by other software, except by Adobe software: Adobe Lightroom Classic can import the data from Photoshop Elements data base into its own data base. This was very important for my migration success. Lightroom can export also the face tagging.

I discovered an issue with the time- and datestamps. In Photoshop Elements it is possible to give incomplete date and time, for example only state the year if I do not know all details. Already Lightroom had problem to interpret this information correctly and I had to implement a workaround with tags. In general, several time and date attributes exist and it is something to understand what is what and how each of the is defined, displayed and managed in the software.

From Lightroom Classic I exported meta data including face tags to files and sidecars.

And migration to digiKam worked good enough. I still have access to my Photoshop Elements database if I want to go back and check anything.

My next step was to migrate from digiKam on macOS to digiKam on Linux. This migration was relatively easy. My current settings in digiKam is to always write data to sidecars, in addition to the digiKam data bases. So I copied photo files and sidecars from macOS to Linux. I took the opportunity to rearrange my folder structure. Then I imported into digiKam and digiKam built new data bases in Linux based on photos and sidecars.

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hpr4070 :: Civilization III

We start our look at the next game in the Civilization franchise.

Thumbnail of Ahuka
Hosted by Ahuka on 2024-03-08 is flagged as Clean and released under a CC-BY-SA license.
Computer games, strategy games, Civilization III. Computer Strategy Games. (Be the first).

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Duration: 00:16:12

This starts our look at Civilization III, which continued the Civilization franchise and followed upon the Alpha Centauri game. This game builds upon the concepts already a part of Civilization, but adds some new features and advancements. Every new version of Civiliation has pushed new concepts and developed the franchise further, and that is one reason why each one has been a best-seller and an award winner.

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hpr4069 :: Passwords and Bitwarden news.

Sgoti talks about passwords and Bitwarden.

Thumbnail of Some Guy On The Internet
Hosted by Some Guy On The Internet on 2024-03-07 is flagged as Clean and released under a CC-BY-SA license.
Bitwarden, Passwords, News. Privacy and Security. 1.

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Duration: 00:12:02

Passwords and Bitwarden news.

Sgoti talks about passwords and Bitwarden.

Highly requested by the Bitwarden community, the new inline autofill menu greatly enhances the user experience, enabling users to fill login credentials faster than ever. Extensive third-party penetration testing was conducted to identify security gaps prior to release.

Passkeys prevent the reuse of passwords across services or platforms because they are created uniquely to each user and service. Thanks to encrypted authentication protocols like WebAuthn, passkeys offer protection against phishing attacks, one of the most common initiation points for breaches and ransomware attacks.

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hpr4068 :: Replacing a lightbulb in a microwave Oven

In this episode I record myself replacing a blown lightbulb in a microwave Oven.

Hosted by MrX on 2024-03-06 is flagged as Explicit and released under a CC-BY-SA license.
repair, electrical, DIY. general. 2.

Listen in ogg, spx, or mp3 format. Play now:

Duration: 00:20:48

Warning:

Microwave Ovens contain lethal voltages and components within the microwave oven can store lethal voltages for many hours after it is unplugged. Please only attempt this if you are qualified to do so.

Show Notes:

As I explained in the episode the bulb within our microwave oven failed after 10 years of use. It is surprising how difficult it is to determine how well the food is cooked without illumination. I therefore decided to have a go at replacing the internal light bulb.

Picture 1 shows the complete microwave
Complete microwave
Complete microwave
Click the thumbnail to see the full-sized image

Picture 2 shows the location and fitment of the faulty bulb in our microwave oven
Location and fitment of faulty bulb
Location and fitment of faulty bulb
Click the thumbnail to see the full-sized image

Picture 3 shows the faulty bulb removed
Faulty bulb removed
Faulty bulb removed
Click the thumbnail to see the full-sized image

Markings found on the faulty bulb revealed it was rated at 230v 20w bulb (I incorrectly stated in my podcast show that it was 30w).

Typing 230v 20w into google provided an amazon link for a replacement universal microwave bulb from Poweka. Two were provided in the packet though this wasn't clear from the description.

Replacement bulb from amazon

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Previous five weeks

hpr4067 :: Hacking AI Models to Protect your Livelihood hosted by hobs

2024-03-05. 00:19:08. Clean. general.
AI, malware, stablediffusion, image generation, art, copyright, AI ethics, hacking, steganography.

Listening to a TWIML AI podcast and reading Accelerondo (SciFi novel) I learned of 4 ways to hack AI

Listen in ogg, spx, or mp3 format.

hpr4066 :: HPR Community News for February 2024 hosted by HPR Volunteers

2024-03-04. 01:09:10. Clean. HPR Community News.
Community News.

HPR Volunteers talk about shows released and comments posted in February 2024

Listen in ogg, spx, or mp3 format.

hpr4065 :: Framework 13 (13th gen Intel) review hosted by Noodlez

2024-03-01. 00:19:17. Clean. general.
framework, laptop, review.

I give a review of the Framework 13 laptop (13th gen Intel). The review is very positive.

Listen in ogg, spx, or mp3 format.

hpr4064 :: Large Language Models hosted by Daniel Persson

2024-02-29. 00:12:38. Clean. general.
machine learning, large language models.

What are they good for?

Listen in ogg, spx, or mp3 format.

hpr4063 :: Re: ChatGPT Output is not compatible with CC-BY-SA hosted by dnt

2024-02-28. 00:26:41. Clean. general.
chatgpt, copyright.

A response to hpr3983, in which Ken argued that shows using chatGPT output can't be posted to HPR

Listen in ogg, spx, or mp3 format.

hpr4062 :: HPR Music Series? - How will it go for the girl and me? hosted by Fred Black

2024-02-27. 00:17:23. Clean. general.
Music.

Fred Black Pitches an idea for a Series of music being shared, and teaches a tune

Listen in ogg, spx, or mp3 format.

hpr4061 :: Setup a Pi-hole hosted by Kevie

2024-02-26. 00:23:11. Clean. general.
security, adverts, filters, home network, router.

Setting an ad blocker and extra security using a Raspberry Pi with Pi-hole

Listen in ogg, spx, or mp3 format.

hpr4060 :: Florida to Georgia hosted by Ahuka

2024-02-23. 00:12:21. Clean. Travel.
RV, travel, southeast US, Florida, Georgia.

We wrap up our Florida adventure and move up to Georgia.

Listen in ogg, spx, or mp3 format.

hpr4059 :: the southern cross hosted by Brian in Ohio

2024-02-22. 00:12:25. Clean. general.
hobby electronics, retrocomputing, z80.

another retro computer

Listen in ogg, spx, or mp3 format.

hpr4058 :: Radio Thermometer hosted by Stache_AF

2024-02-21. 00:05:21. Clean. Hobby Electronics.
Hobby electronics, circuit python.

Stache talks about building a thing to solve an issue at work

Listen in ogg, spx, or mp3 format.

hpr4057 :: Raspberry Pi and astro imaging hosted by Andrew Conway

2024-02-20. 00:30:55. Clean. general.
astronomy, telescope, camera, raspberrypi.

On how to build a cheap astro imager using a raspberry pi

Listen in ogg, spx, or mp3 format.

hpr4056 :: Helping with back pain hosted by Kevie

2024-02-19. 00:09:27. Clean. general.
aches, sore back, back support.

My experience using the CopperFit Advanced Back Pro

Listen in ogg, spx, or mp3 format.

hpr4055 :: Four agalmic AI applications to protect you from greedy corporations hosted by hobs

2024-02-16. 00:19:08. Clean. general.
AI, NLP, open source, image watermarking, facial recognition, post scarcity, economics, copyrights, .

4 open source AI apps to protect you from BigTech: Fawkes, Glaze, Nightshade, Agalmic organizations

Listen in ogg, spx, or mp3 format.

hpr4054 :: CyberPunk 2077 hosted by Daniel Persson

2024-02-15. 00:06:57. Clean. general.
games, story, experience.

My experience playing CyberPunk 2077

Listen in ogg, spx, or mp3 format.

hpr4053 :: Third Party Integrations hosted by Lee

2024-02-14. 00:11:43. Clean. general.
api, programming.

Connecting your application with others

Listen in ogg, spx, or mp3 format.

hpr4052 :: How I got in to Linux / Micro Edition hosted by geospart

2024-02-13. 00:05:04. Clean. general.
linux, open source, creative commons.

A slightly boring story of my introduction in to Linux

Listen in ogg, spx, or mp3 format.

hpr4051 :: MSI Gungnir 110R Review hosted by Kevie

2024-02-12. 00:22:18. Clean. general.
PC, Hardware, computer.

A review of the Gungnir 110R PC case by MSI

Listen in ogg, spx, or mp3 format.

hpr4050 :: Playing Alpha Centauri, Part 5 hosted by Ahuka

2024-02-09. 00:18:53. Clean. Computer Strategy Games.
Computer games, strategy games, Alpha Centauri.

Part 5 of tips on playing Alpha Centauri

Listen in ogg, spx, or mp3 format.

hpr4049 :: What's in my bag January 2024 hosted by swift110

2024-02-08. 00:10:00. Clean. general.
bag, apple, laptop.

I describe what I carry on a day to day basis

Listen in ogg, spx, or mp3 format.

hpr4048 :: Today I learnt: Ship’s Bells hosted by Trey

2024-02-07. 00:06:40. Clean. Today I Learnt.
ships bells, time, naval, clocks, timekeeping.

A brief history and description of ship's bells for timekeeping

Listen in ogg, spx, or mp3 format.

hpr4047 :: Change your passwords once in a while hosted by Deltaray

2024-02-06. 00:15:38. Clean. general.
passwords, security, cybersecurity, passphrases, password managers, advice.

Deltaray provides compelling arguments for why you should change your passwords periodically

Listen in ogg, spx, or mp3 format.

hpr4046 :: HPR Community News for January 2024 hosted by HPR Volunteers

2024-02-05. 00:54:29. Clean. HPR Community News.
Community News.

HPR Volunteers talk about shows released and comments posted in January 2024

Listen in ogg, spx, or mp3 format.

hpr4045 :: My Macbook Pro 15" 2015 hosted by swift110

2024-02-02. 00:10:04. Clean. general.
Apple, laptops, Macbook pro, computers.

I discuss the specs and why I love this machine so much

Listen in ogg, spx, or mp3 format.

hpr4044 :: Advent of code day 11-21 catchup hosted by Daniel Persson

2024-02-01. 00:12:37. Clean. general.
advent of code, 2023, challenge.

I talk through the last challenges of this years advent of code that I actually did.

Listen in ogg, spx, or mp3 format.

hpr4043 :: Uncommon Commands, Episode 1 hosted by Deltaray

2024-01-31. 00:10:16. Clean. general.
cli, command line, linux, uncommon commands.

A summary of the three command line commands, look, shuf, and xargs

Listen in ogg, spx, or mp3 format.

hpr4042 :: Debugging directly in vim hosted by crvs

2024-01-30. 00:33:18. Clean. general.
gdb, vim, debug, C.

Debug directly in vim using termdebug bundled with vim since vim 8.1

Listen in ogg, spx, or mp3 format.

hpr4041 :: Using grepcidr to find IPs in a netblock hosted by Deltaray

2024-01-29. 00:11:20. Clean. general.
cli, command line, linux, sysadmin, networking.

An introduction to the grepcidr command, which makes finding IPs from a netblock in log files easier

Listen in ogg, spx, or mp3 format.

hpr4040 :: Further Into Florida hosted by Ahuka

2024-01-26. 00:14:53. Clean. Travel.
RV, travel, southeast US, Florida.

We continue our Florida journey and hit the Kennedy Space Center.

Listen in ogg, spx, or mp3 format.

hpr4039 :: 3 ways to keep up with Youtube Channels hosted by norrist

2024-01-25. 00:10:04. Clean. general.
youtube, php, rss.

norrist blasts out a quick episode about 3 ways he keeps up with youtube channels

Listen in ogg, spx, or mp3 format.

hpr4038 :: Network Attach Storage Options I Use Everyday hosted by Beto

2024-01-24. 00:39:01. Clean. Networking.
Network Attached Storage, TrueNas, Synology, NAS, Windows, Linus, FreeBSD.

A quick overview of the NAS systems/technology I use today and what I have used in the past.

Listen in ogg, spx, or mp3 format.

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