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FFmpeg 4.3

ffmpeg.org

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Re: FFmpeg 4.3

#62

Post by TheAceOfHearts »

apitman wrote: post #32

In case you didn't know, you can use FFmpeg to convert Audible aax files to DRM-free MP3/AAC/whatever [0] (scroll down for FFmpeg instructions). This is useful if for some reason you want to archive them or play them in an app that doesn't constantly change its UI and bombard you with ads. [0]: https://www.kylepiira.com/2019/05/12/how-to-break-audible-dr...

If you're converting .aax files you should consider using .m4b as the output, since it preserves chapters and remembers your last listened timestamp [0]:

> Audiobook and podcast files, which also contain metadata including chapter markers, images, and hyperlinks, can use the extension .m4a, but more commonly use the .m4b extension. An .m4a audio file cannot "bookmark" (remember the last listening spot), whereas .m4b extension files can.

The cool thing is that once you rip your activation bytes, it works for all your audiobooks. Would definitely recommend it.

[0] https://en.wikipedia.org/wiki/MPEG-4_Part_14

Re: FFmpeg 4.3

#63

Post by superkuh »

snazz wrote: post #60
memexy wrote: post #58

Somewhat related. Anyone have a good utility for downloading youtube videos?

https://ytdl-org.github.io/youtube-dl/index.html is the gold standard.

And back on topic youtube-dl uses system ffmpeg for converting youtube's .webm and other weird discrete formats into proper video (or audio) files.

Re: FFmpeg 4.3

#65

Post by DonnyV »

MisterPea wrote: post #3

Can someone explain to me how FFmpeg seems to be the only open-source software to do even just basic functionality with audio. I was looking at getting the sound wave graph for a piece of audio a while ago, and not only was FFmpeg the only option I found to be able to do it, it was amazingly fast and also free.

What about Reaper? Its a full fledged DAW. http://reaper.fm/

Re: FFmpeg 4.3

#67

Post by soygul »

FFmpeg is one of the prime examples of open-source software, but a lot depends on the 3rd party libraries it uses. I tried using my Android phone to convert my videos from H.264 to HEVC (H.265) for storage, but it was ~3.5 times slower in comparison to x86 CPUs, in terms of frames encoded per second per watts of power consumed (FPS/Watt): https://quanticdev.com/articles/h265-encoding-on-arm-cpus

Though still, I can't even imagine attempting this test without FFmpeg in the first place. It is available directly in Termux on Android.

Re: FFmpeg 4.3

#68

Post by ivansavz »

MisterPea wrote: post #3

Can someone explain to me how FFmpeg seems to be the only open-source software to do even just basic functionality with audio. I was looking at getting the sound wave graph for a piece of audio a while ago, and not only was FFmpeg the only option I found to be able to do it, it was amazingly fast and also free.

In case that's helpful, here is the code we use to generate waveforms using: .mp3 -(1)-> .wav -> numpy -> matplotlib: https://github.com/learningequality/pressurecooker/blob/mast...

ffmpeg is used for the key step (1) ...

Re: FFmpeg 4.3

#69

Post by [deleted] »

tambourine_man wrote: post #9

ffmpeg is amazing, but it’s like tar on steroids: I can never remember the right incantation. Google is required for even the simplest of things. I don’t know if it’s their goal, but I’d love a more user friendly set of command line arguments.

[deleted]
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