FFmpeg VS OpenH264

Okay I can see how you thought that. And we do use something higher for all the other parts. Look at ffmpeg for an example. https://github.com/ffmpeg/ffmpeg The github mirror says a mere 6.6% is assembly

Ok, i need download ffmpeg from https://ffmpeg.org/ and install it to directory, where located my .py script and .ogg file?

PATH is a list of places where your system searches for executables. You should install FFMPEG from https://ffmpeg.org/, not just the pip package for it. In fact the pip package "ffmpeg" appears to be not very widely-used, I would recommend you avoid it.

I don't have one of those and can't speak from experience, I'm thinking ffmpeg in a loop could maybe set you up though.

I would recommend using Handbrake (gui) or ffmpeg (terminal). You can easily compress videos to a fraction of their size. I have a few videos on my portfolio, the screen recording of one of them is 60.5MB, the compressed version is 2.7MB. Both 8s long, the original is 3024×1730 and the compressed 1887×1080. The compressed video is roughly 96% smaller (if my math is correct).

It's a perfect language to learn if you wanna go AV specialization. You will eventually run into ffmpeg (https://ffmpeg.org/) specifically avcodec library that can open and decode just about any video format. That means that you will also need to learn some graphics library so I also recommend SDL (https://www.libsdl.org/).

FFmpeg * Example: ffmpeg -i soundtrackFile.m4a forUSB.mp3 * Batch script * Documentation

I don't have experience doing this with flutter, but I've done exactly what you are asking with ffmpeg via a webassembly ffmpeg wrapper (my example here). There seems to be a flutter ready wrapper around ffmpeg: https://pub.dev/packages/ffmpeg_kit_flutter

Have you tried VP9? I've found it to have a nice balance of support and efficiency. It's also easier to decode than AV1, with smooth playback at resolutions and frame rates that would end up choppy with AV1. After some experimentation to find decent settings with the free and open source FFmpeg, I developed this little bash script for a fire-and-forget solution. I use the webm container format, but mkv should work too. Since you're using mkv, you don't have to use Opus audio if that causes compatibility issues; you can use aac instead of libopus.

If looking to automate, https://imagemagick.org/ or https://ffmpeg.org/ should do the trick.

One of the linked pull requests: https://github.com/cisco/openh264/commit/db956674bbdfbaab5ac...

Macros in a macro assembler .. not very nice.

H264 performance in flatpak: This is not easy to solve because of patent problems. I filed https://github.com/cisco/openh264/issues/3478 and https://github.com/cisco/openh264/issues/3479 to help with some of the correctness problems and https://bugzilla.mozilla.org/show_bug.cgi?id=1755361 which will disable playback with broken OpenH264 by default.