Ffmprovisr – Making FFmpeg Easier

https://amiaopensource.github.io/ffmprovisr/

by nice__two • 3 years ago

414 93 3 years ago

amiaopensource.github.io

This is a great idea! Trying to get FFmpeg to do what I want it to do is always daunting. ChatGPT has been helpful, but not perfect. Thanks for this :)

mewpmewp2• 3 years ago

ChatGPT totally made ffmpeg very accessible to me. I think minor issues I have is intricacies between different operation systems.

nirav72• 3 years ago

Chatgpt made lot of CLI tool args/options easy to use. I always had a hard time remembering OpenSSL options and arguments. Now I just use gpt

Am4TIfIsER0ppos• 3 years ago

Transcode to an H.264 access file

You use "access" several times but I don't know what you mean by it. I'm going to guess that is some non-english usage slipping in. Nothing else to complain about at this time. [EDIT] I should say "is used" and "they mean" because I don't know if the author is also the poster.

tyingq• 3 years ago

I think it might just be autocorrect translating "AAC" into "access".

shellac• 3 years ago

'Access' copies are versions of originals intended for viewing, in contrast to the original ('preservation') video which may be impractically large to use, or in an unusual format.

(At least that is how the term is used by collections librarians. Even there terminology may vary)

bmsleight_• 3 years ago

vectorscope is a great commend to bookmark.

toxik• 3 years ago

Nice idea, but needs a better name!

naillo• 3 years ago

I like the name

tap-snap-or-nap• 3 years ago

Name is perfect.

asicsp2• 3 years ago

See also:

* https://ffmpeg.guide/ — create complex FFmpeg filtergraphs quickly and correctly

* https://www.hadet.dev/ffmpeg-cheatsheet/ — clipping, adding fade in/out, scaling, concat, etc

arun-mani-j• 3 years ago

ffmpeg.guide is really awesome. Do we have something similar for ImageMagick?

asicsp2• 3 years ago

I'm not aware of one. I checked my bookmarks and found https://imagemagick.org/Usage/basics/ which has examples, discusses philosophy and methodology

boomboomsubban3• 3 years ago

The second link's clipping command is not ideal in my experience. For some god known reason, ffmpeg behaves differently depending on whether you put the -ss and -t/-to flags before or after the -i flag. And for me, before worked better.

It's also an issue in the original post.

throw7• 3 years ago

my understanding is options in the cli are tied to either global options, input file options, or output file options; so placing options after -i option(s) would tie it to the output file... i'm definitely not an ffmpeg expert though.

zebracanevra• 3 years ago

Effectively, placing ss before the input filename seeks the file (the container?) without decoding it. Placing it after will decode the streams while skipping to the point you specify.

Seeking the container is usually much faster than decoding and then throwing away what you don't need, but it has fatal flaw: most videos use p-frames and thus require you to decode the frames before it.

So, say you want to skip to 60 seconds in. The solution is to do "-ss 50 -i input.mkv -ss 10", which is fast and should get the keyframes you need.

seba_dos1• 3 years ago

For some god known reason

...which becomes obvious once you notice that options apply either to one of the inputs or output.

rendaw• 3 years ago

ffmpeg.guide looks amazing, but it feels like ffmpeg should really have something better itself. It's crazy trying to shoehorn a graph (non-linear) into a commandline (flat, linear). Even just a more verbose json config would be great.

throwaway290• 3 years ago

Or just use ffmpeg-python.

BasedAnon• 3 years ago

if you want to improve a page like this include a screenshot

forgotpwd163• 3 years ago

The page is a collection of commands to perform specific actions like transcoding, syncing video/audio/subs, etc. Screenshot(s) won't offer any additional information/help.

forgotpwd163• 3 years ago

A nice collection. Wish those examples, or part of them, were included in ffmpeg manual. The ImageMagick section can easily be expanded to a site of its own.

alexkrkn• 3 years ago

Very useful!

I started using chatgpt to come up with ffmpeg commands, just so much faster and easier to find what I need.

I made a small tool so I can do it right in the cli: https://github.com/alexkrkn/help-cli

and made a video about it: https://www.youtube.com/watch?v=pOda6TDBqcY

jameskerr• 3 years ago

All Ive ever wanted was to convert mp4 to gif.

robertoandred2• 3 years ago

Why?

Terretta2• 3 years ago

Perhaps it's a form of hipster irony, since by and large all GIF sites and social media sites now convert source GIFs to mp4.

chefandy5• 3 years ago

What's more confounding about this than translating between any other two formats?

paradox460• 3 years ago

You can do that with ffmpeg, but the output isn't ideal

I'd use gifski: https://gif.ski/

jmiskovic• 3 years ago

I use ffmpeg often because it's so powerful, but its api cannot fit in my head. It should have a LLM frontend.

yorwba• 3 years ago

The API doesn't fit in my head either, but grepping through https://ffmpeg.org/ffmpeg-all.html usually gives me the option I need.

Paianni• 3 years ago

Probably the biggest barrier to ffmpeg adoption is all the offline 'freemium' and web frontends, the host sites for which have been SEO'd for phrases people commonly put into Google like "avi to mp4", "mp3 to wav", etc..

It took me more time than I wish it did to become open to using CLI apps, the Windows world had taught me to expect a GUI for everything.

Tactician_mark• 3 years ago

I thought most of those file conversion sites were just ffmpeg on top of nginx or something?

vxNsr• 3 years ago

They almost certainly are, cli is not always the best interface but ffmpeg covers such a wide swath of video utilities that I’m not sure how you could include all of its functionality in a GUI.

mrob• 3 years ago

This guide recommends "yadif" as a deinterlacing filter. I find "w3fdif" looks better. Like yadif, it does not do motion tracking, so it's reasonably fast and avoids the distracting artifacts that motion tracking sometimes causes (I'd rather have consistently mediocre results than sometimes great and sometimes bad), but it considers three fields at a time instead of yadif's two, which lets it hide the interlacing artifacts better.

brucethemoose23• 3 years ago

There is an extension of that: https://github.com/HomeOfVapourSynthEvolution/VapourSynth-Bw...

Though if you are reencoding, you mind as well go whole hog and use QTGMC.

kierank• 3 years ago

"bwdif" is a hybrid of "yadif" and "w3fdif"

Trixter• 3 years ago

As previously suggested, w3fdif has mostly been supplanted by bwdif. w3fdif can produce shimmering, whereas yadif does not, which is why bwdif operates like yadif but uses the better field matching of w3fdif.

yard2010• 3 years ago

A bit off topic, IMO ffmpeg is one of the best software ever written. Fabian Fabrice (ff) is one talented engineer and people such as him are a gift to the FOSS community.

I used to work in a ~2 bil unicorn in which a big part of the products we worked on relied on ffmpeg.

edent• 3 years ago

And you gave a sizable donation, right?

https://ffmpeg.org/donations.html

Xeoncross• 3 years ago

I have a feeling the ~$2b wasn't his

Still, good reminder to speak up about the products to leadership and see if we can get them to donate.

halJordan• 3 years ago

How about you just give a donation for all three of us?

forgotpwd163• 3 years ago

Fabian Fabrice

*Fabrice Bellard. Also creator of QEMU, TCC, QuickJS, and others.

hddqsb• 3 years ago

Yeah, the etymology suggested by the top-level comment is completely wrong. Wikipedia says

The name of the project is inspired by the MPEG video standards group, together with "FF" for "fast forward"

Corresponding source (Fabrice Bellard himself): https://ffmpeg.org/pipermail/ffmpeg-devel/2006-February/0103...

cornstalks• 3 years ago

FYI the “FF” in “FFmpeg” stands for “fast forward.”

9dev• 3 years ago

There are no people such as Him. There’s nobody else in his league, heck, there’s nobody even playing the same game as Fabrice Bellard :-)

In all seriousness though, the sheer amount of devices running code he wrote at any given moment is just ridiculous.

andrewstuart2• 3 years ago

Fabian Fabrice has created many amazing software projects.

Comparable only to famous film director Alan Smithee who has credit for so many films.

30nn• 3 years ago

I love ffmpeg, but its performance has got to improve on ARM!

ChrisMarshallNY2• 3 years ago

Great stuff!

ffmpeg is infrastructure-level important, and tools like this keep it going.

ta12432• 3 years ago

No they don't. There's maybe 20 people that keep it going

ChrisMarshallNY2• 3 years ago

Fair point

Eisenstein2• 3 years ago

People like to say that ffmpeg is complicated but when you make it into a nice gui it doesn't get any easier -- it is video compression itself that is complicated. No software could make it easier without making the decisions for you, like handbrake or some other click-through interface.

I'm not certain, but I highly suspect that if I sat down and learned about digital video encoding and compression on a granular enough level then figuring out how to do things in ffmpeg would be rather intuitive. Does anyone have experience doing this?

legends2k• 3 years ago

I've written DirectShow filters around 17 years back for WindowsMobile (not Windows Phone) so I've a decent understanding of codecs and containers.

Formats like mkv or codecs like HEVC didn't exist back then but the concept of manipulating audio/video through a bunch of filters is a wonderful one and most (all?) a/v transforming software does it. When I started looking into FFmpeg's man pages I could connect the dots and start using it after a day of fooling around.

I'm a CLI lover and man page reader so perhaps it worked to my advantage.

brucethemoose23• 3 years ago

Since ffmpeg CLI still makes me pull my hair out, even with excellent guides, I am going to plug vapoursynth:

https://www.vapoursynth.com/

Its optimized Pythonic video filtering... But also so much more: https://vsdb.top/

And Staxrip, which makes such good use of ffmpeg, vapoursynth, and dozens of other encoders and tools that I reboot from linux to Windows just to use it: https://github.com/staxrip/staxrip

krick• 3 years ago

I would really appreciate just an ffmpeg wrapper with better CLI. It is unnecessarily convoluted, and while I don't know if there's a point of view from which it actually all makes sense, it is just inadequate in performing all sorts of extremely common tasks it is perfectly able to perform, if one knows which magic words it needs to hear. I probably have dozens of bash-aliases, that are nothing more than encoding 150-character ffmpeg commands into 2 simple words.

It is also incredibly stupid how 99% of time ffprobe is used without any arguments to just quickly see something as mundane as duration, resolution, framerate, MAYBE number of audio-tracks, yet 99% of its output is some completely irrelevant bullshit like compiling options.

brucethemoose23• 3 years ago

> I would really appreciate just an ffmpeg wrapper with better CLI.

There were (are?) tons of them on GitHub. But many are still obscure, or are single dev efforts that fizzled out.

Some focused, purpose built CLI frontends (like Av1an, specifically for transcoding) are excellent at what they do. Perhaps that is the better way than an all encompassing wrapper.

ta12432• 3 years ago

https://ffmpeg.org/ffmpeg-filters.html makes ffmpeg easier, not stuff like this.

7373737373• 3 years ago

The navigation layout of this is not ideal yet.

Specific recipes that should be added:

Removing audio: ffmpeg -i $input_file -c copy -an $output_file

Halving resolution: ffmpeg -i $input_file -vf "scale=iw/2:ih/2" $output_file

chefandy5• 3 years ago

Those anchors don't work on Firefox on Android. The author is losing... I dunno.... 1e-20% or whatever of the browser market share among my fellow Android FF users.

boomboomsubban3• 3 years ago

They do work, just poorly. The text opens, but it scrolls you down to the end of the text.

chefandy5• 3 years ago

There must be something else happening on my install, then.

giovannibonetti• 3 years ago

Related: I have a small library of personal videos, including from my wedding, and I'd like to compress it as much as I can to reduce its storage footprint. I don't care much about codec compatibility, as long as I can watch them on my (ARM) MacBook, it's good.

In the past (over 10 years ago), I used to work with H.264, but I remember fiddling with parameters was a pain. I wonder if nowadays there are some promising new codecs based on ML. Again, as long as it works in my machine it's good, so anything from GitHub, HuggingFace and so on is acceptable, as long as it doesn't need too much effort and specialized knowledge to run it.

frankplow• 3 years ago

There are some promising codecs based on neural networks, however they are all very much research projects and have major limitations. Additionally, the compression ratios are only marginally higher than state-of-the-art engineered codecs. I think for your use case a more modern engineered codec such as VVC (H.266) or AV1 is perhaps more suitable.

justsomehnguy4• 3 years ago

Define 'small'? In GB/TB

danjc• 3 years ago

I'd recommend not re-encoding as you'll have irrevocably lost data. Whatever it's size, in the future it won't be large.

Given_47• 3 years ago

Yea can get wonky, -c:v copy is the correct flag to not re-encode

drewtato• 3 years ago

This depends on how much time you want to spend. If you want the transcode to take less time than the playtime of your videos, it'll probably be best to just use the best hardware encoder you have with high quality settings.

If you have more time, then AV1 is good. Read through the trac page [1] and do test encodes with 5-10 seconds of video to determine what settings give you your desired quality. Note that low `-cpu-used` or `-preset` values will give great quality but take incredibly long. Then, encode a few minutes of video with various settings to determine what settings give you your desired file size.

For human time usage, keep track of the commands and options you use and how those affect the output. If the job will take more than a few hours, write your script to be cancellable and resumable.

[1] https://trac.ffmpeg.org/wiki/Encode/AV1

xenodium• 3 years ago

Huge ffmpeg fan, though I could never remember the magical incantations I've used.

Nowadays I wrapped them all with Emacs functions. This makes them easily accessible as a "right-click" menu of sorts via M-x.

https://xenodium.com/emacs-ffmpeg-and-macos-alias-commands

mynameisfunk• 3 years ago

In the spirit of making FFmpeg and video processing easier, we open-sourced a chat-based agent to assist video production - https://github.com/remyxai/FFMPerative

fladd• 3 years ago

I am a bit confused. This seems to be about the command line programme "ffmpeg" that comes with the library, but not the library itself. That programme seems already very well documented, with a help option, a man page and everything. It is usually the library that no one knows how to properly use, due to a lack of documentation :-)

thentherewere2• 3 years ago

As someone who uses ffmpeg daily (mostly basic functions), I now rely on chatGPT to approximate the command and fine tune from there. Haven't used too many of the advanced features of ffmpeg so glad someone seems to be covering those use cases as most tutorials dont cover them.

vorticalbox• 3 years ago

I had a whole folder of videos I wanted to convert to 720p, asked chatGPT and it gave me this:

find . -maxdepth 1 -type f -name "" -exec sh -c 'pv "$1" | ffmpeg -i pipe:0 -filter:v scale=720:-2 -c:a copy "${1%.}.mp4" 2> /dev/null' _ {} \;

Not sure if it can be improved but it works well

colecut• 3 years ago

I was looking for a ffmpeg UI recently and came across Shutter Encoder. It's open source, mac/windows, very good software.

I've finally started compressing my 15 year, 300GB personal video collection..

https://www.shutterencoder.com/

I'm compressing everything using, H.265 and videos are shrinking to sometimes 1/10th the size.. Is there who would give me reasons why I would not want to do this? I've read that it takes more processing power to watch these compressed videos, but not sure that will cause much trouble in the future...

hsbauauvhabzb• 3 years ago

I tried this automated across a large video collection and the quality was subpar because my CRV settings were weak despite looking fine on the test videos. Consider that a word of warning, validate many videos before removing the masters.

But with 300gb, storage is cheap enough that you could just keep the masters.

harrygeez• 3 years ago

One reason for me to still pick h.264 is many aging (or budget?) hardware doesn't have hardware decoding for h.265.

Also it's just easier on my homelab to use Plex without having to transcode

andrewstuart2• 3 years ago

Ffmpeg and ChatGPT are a match made in Heaven.

parentheses• 3 years ago

This is something a GPT would do way better.

Ffmprovisr – Making FFmpeg Easier

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