The Nineteenth Byte

3:00 AM

i can kinda see why dbc is calling it less arbitrary and cleaner in a sense, but i imagine that in general it wouldn't make the programs themselves look cleaner

quartata

@TheBitByte I think it looks OK but I'd still leave it for longer so more people can see it

DJMcMayhem

What's the best tool to convert .avi to .gif?

I just made a vim video, and I want to upload it to my answer

quartata

ffmpeg I think

Lynn

“What’s the best tool to convert—” “ffmpeg”

DJMcMayhem

is that on windows?

Lynn

3:05 AM

Sure

It works from the command line, though!

quartata

Can ffmpeg do gif? Trying to remember

DJMcMayhem

That's fine by me. Even though I'm a microsoft peasant, I'm perfectly comfortable from the command line.

Lynn

121

Q: How do I convert a video to GIF using ffmpeg, with reasonable quality?

I'm converting .flv movie to .gif file with ffmpeg. ffmpeg -i input.flv -ss 00:00:00.000 -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000 output.gif It works great, but output gif file has a very low quality. Any ideas how can I improve quality of converted gif? Output of command: ffmpeg -i...

DJMcMayhem

That sure beats uploading a 45 MB .avi to an online converter >_>

quartata

which probably uses ffmpeg as the backend

Nathan Merrill

3:07 AM

can ffmpeg trim mp3s without reencoding?

also, can it remove metadata?

TheBitByte

@quartata Are you sure I should leave it for longer? I was going to press post right now, until I read your chat post.

@NathanMerrill Actually, what can't ffmpeg do? Haha.

DJMcMayhem

Holy shit there's a lot of options...

Nathan Merrill

snipplr.com/view/68795/…

DJMcMayhem

It's overwhelming

Nathan Merrill

wow, it can do my metadata task too

yeah, its totally the tool

(I asked because I used to do a name-that-tune with a music community I was involved with)

quartata

3:09 AM

Yes of course. You should leave it for 24+ hours so people from other timezones can see it

TheBitByte

@NathanMerrill I hate CLIs, though. Gotta look up a manual each time. Clicking icons is so much better.

Nathan Merrill

so I would trim thousands of songs, remove all metadata, and upload them

@TheBitByte nah, CLIs make things so much easier to automate

TheBitByte

@NathanMerrill Sure, but GUIs are easier to use and you don't need to keep looking at manpages to understand them.

DJMcMayhem

So now the question is, what's faster, waiting for it to upload, or taking the time to understand ffmpeg?

Nathan Merrill

@TheBitByte psh, its not that hard to do -help

TheBitByte

3:11 AM

@NathanMerrill To do it each and every time, though, I wouldn't bother.

Downgoat

question: where did the [a, b, c] syntax for arrays originiate?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@quartata oh okay

quartata

@Downgoat Not sure. Neither C nor Perl use it so it might be more recent.

Maltysen

@Downgoat I would guess from math

vectors do it (in linear algebra)

like: [1 2 3]

DJMcMayhem

Yay, I figured it out!

Downgoat

3:18 AM

another question. What is the point of * in int* x. Without the * wouldn't x point to a int-sized block of memory anyway?

Maltysen

@Downgoat right, but a) int sized != pointer size b) c is a typed language, the * is there so the compiler knows its a pointer and lets you dereference it and stuff.

Downgoat

@Maltysen but isn't everything a pointer in C?

Maltysen

no?

Downgoat

wait wat why not?

DJMcMayhem

Yay, my first vim answer with a gif! \o/

6

A: End the tabs versus space war

Vim, 37 34 bytes :%s/\t/ /g :%norm ^F r/hv0r*r/ Try it online! This uses the V interpreter because it's backwards compatible. A very straightforward solution. Here's a gif that lets you see the solution happen in real time. I added some extra keystrokes to make it run slower so you can s...

Downgoat

3:21 AM

@DJMcMayhem -1 your vim looks boring :/

Maltysen

@Downgoat int x = 5; designates an int sized peice of memory and sets it to five. int* y=&x; gives you a pointer to that peice of memory and stores it in another piece of memory called y

DJMcMayhem

That's not what my real vim looks like.

Although you're right, I dislike the plain white background.

Downgoat

@Maltysen wait so: int *y = &x does *y == x?

Maltysen

yup

y is just storing another number, but this number is actually a pointer to x

Downgoat

so then does int really mean anything in this case? I assume a pointer-sized peice memory is allocated rather than an int's

Maltysen

3:24 AM

yeah

int is system specific size

likewise with pointers

quartata

int* tells the compiler the type of what the pointer points to for type safety

Maltysen

if you want to allocate more memory, then use long

DJMcMayhem

@Downgoat My real vim:

Downgoat

@quartata ahhh ok. that's what I was wondering. thx

@DJMcMayhem :D I use dark theme too

DJMcMayhem

:O which one?

Downgoat

3:25 AM

solarized >_>

Maltysen

@Downgoat cuz you can have things like int** x

quartata

wheee double pointer

Downgoat

@Maltysen oh my

such pointer very goat brain lost track

Maltysen

@Downgoat try writing a linked list :D

much fun, very pointer

quartata

Has anyone ever seen a triple pointer in production?

That would be a double pointer

assuming your implementation is sane

Downgoat

3:28 AM

so what's the type of a pointer?

int?

Maltysen

@quartata no yeah, you're right

@Downgoat no, its its own type

and its size is system dependent

that's why int y = &x; is so dangerous

quartata

@Downgoat Int or Long depending on system

Maltysen

you'll prolly cut off half the pointer

Downgoat

@Maltysen do i have to figure it out or is there some ptrsize_t kinda thing?

Maltysen

@Downgoat sizeof

Downgoat

3:30 AM

I want to do ptrsize_t myPointerArray[] = { &goat, &sheep, &dog }

quartata

What are you writing in C anyways?

Downgoat

well I'm learning C++ rn anyway but I decided to get a good grip on C before I do C++

Maltysen

@Downgoat c is better than c++. *ducks*

Downgoat

I want to rewrite cheddar in a not slow, un-portable, bulky, and generally shit language

quartata

They are kind of different animals with regards to references.

Maltysen

3:33 AM

@Downgoat I'm serious though, If you want to learn C, writing a linked list is actually a great exercise

quartata

To answer your question though you would probably do malloc(sizeof(&goat) * 3) and then assign appropriately

Downgoat

malloc returns a pointer though. How do I know what size variable i need to store that pointer though ._.

quartata

Lemme see if there is a type in stdint.h

Downgoat

size_t?

Maltysen

@Downgoat no a pointer

quartata

3:35 AM

Actually a better way is just to do type** goats = {...}

Maltysen

like animal*

(if that's your type)

DJMcMayhem

Not sure if impressive answer or spam...

0

A: Emulate an Intel 8086 CPU

Not sure proprietary cores are welcome here :) but I wanted to post to say that this question/challenge was one of my inspirations in developing the MCL86 core. I was exited to see that I was not alone in my affinity for the Intel 8086/8088 as it was the processor in my first computer, the IBM ...

Downgoat

ok but what if I want an array of pointers. And those pointers can point to whatever type. I just need to know the size of a pointer to solve everything in this case

Maltysen

@Downgoat you don't need to know what size to store it in, * takes care of that for you, just like you don't need to worry about the size of an int when you do int x = 5;

like say its an array of int pointers: int** = {&x, &y, &z};

@quartata that reminds me, triple pointer can be used in a 3d array for like a rgb bitmap or something

it wouldn't usually be a triple pointer, but it's possible

and if you don't know what the pointers point to: void** = {&blah1, &blah2};

primo

@Lynn was. hi?

Lynn

3:42 AM

ooops, I'm off to bed (it's 5:41 AM here)

Was just wondering if there's any obvious improvements to the Perl answer I linked

But, I'll find out tomorrow, maybe! *waves*

TheBitByte

4:34 AM

Hey, wanna ask you about something.

My challenge (http://meta.codegolf.stackexchange.com/a/9960/58717), I was planning to do an edit where code without input must produce a quine, but when given normal input it should work normally. Is this interesting or too hard?

Sp3000

@El'endiaStarman Technically what I did wasn't very appropriate (if I had some private way of contacting you, that would have been the better course of action) :P

TheBitByte

SE is offline for maintenance.

Sp3000

@xnor Coming up with a Python cop? :D

New Sandboxed Posts

5:07 AM

0

A: Sandbox for Proposed Challenges

SCĀN DĀC|TȲLĪC | HĒXĂMĚT|ĒR ĪN | A ŪNǏQUĚ | PŪZZLĚ As a terrible Latin student for several years I have learned to hate many things about Latin. However there is one thing I love. Latin scansion. Latin scansion has many of rules. For this problem we will be using simplified subset of those r...

Maltysen

does anyone know what happened to the people's python?

Sp3000

github.com/HelkaHomba/ThePeoplesPython apparently redirects to github.com/DJMcMayhem/ThePeoplesPython now, and was last updated 7 days ago?

Helka Homba

Aug 24 at 3:16, by Helka Homba

Anyone want me to transfer repo ownership of https://github.com/HelkaHomba/ThePeoplesPython to them?

DJMcMayhem

5:29 AM

@Sp3000 Yeah, I took over it. I haven't done anything interesting yet

Destructible Watermelon

6:19 AM

@DJMcMayhem can I be apart of this peoples python thing?

DJMcMayhem

@DestructibleWatermelon Yeah, absolutely! What do you want to be?

Destructible Watermelon

@DJMcMayhem lemme think

primo

@Lynn s,\t| ,/**/,g;s;//;**;g

might be considered invalid, due to the s;//;

Destructible Watermelon

@DJMcMayhem I think I'll be slice cos I'm a watermelon

wait, I changed my mind since sliceis useless

ASCII-only

@DJMcMayhem Oh wait I can be ascii now

DJMcMayhem

6:30 AM

Haha, that would be perfect

Just gimme a minute before I update it

@DestructibleWatermelon What do you want to be?

Destructible Watermelon

still thinking

DJMcMayhem

OK, well I'm about to head to bead so unless you want it some other day, think faster! :P

Destructible Watermelon

can i be ord?

DJMcMayhem

Oh, I thought someone else already had that. Apparently not.

What do you want the text to be? Just destructiblewatermelon? (it should be all lowercase)

ASCII-only

> bead

DJMcMayhem

6:39 AM

heh obviously I'm more tired than I thought

>>> help(ascii)
Help on built-in function ascii in module builtins:

ascii(obj, /)
Return an ASCII-only representation of an object.

As repr(), return a string containing a printable representation of an
object, but escape the non-ASCII characters in the string returned by
repr() using \\x, \\u or \\U escapes. This generates a string similar
to that returned by repr() in Python 2.

>>>

It's perfect for you.

ASCII-only

Also

I have a suspicion The People's Python's golfiness will be close to that of Java

DJMcMayhem

haha, maybe worse.

range == drgreeneggsandhamdj

if == calvins

github.com/DJMcMayhem/ThePeoplesPython/commit/…

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