codec2
SVT-AV1
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| codec2 | SVT-AV1 | |
|---|---|---|
| 10 | 30 | |
| 123 | 1,320 | |
| - | - | |
| 8.5 | 9.3 | |
| about 18 hours ago | about 3 years ago | |
| C | C | |
| GNU Lesser General Public License v3.0 only | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
codec2
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Flop rock: inside the underground floppy disk music scene
I'm currently working on a 2HD floppy disk release of a podcast episode which has taken me down an interesting rabbit hole of low-bitrate audio codecs, floppy disk aesthetics and label design.
The episode I'm releasing is 1h40m long, which sounds like it couldn't possibly fit in 1.44MB, but there's an obscure but free codec mostly used by digital HAM radio enthusiasts called Codec2 [1] which can encode human voice in as low as 700bit/s (roughly 315KB/hr). At that quality setting it sounds like complete garbage, although still barely intelligible, and there are no readily available media players for the it (there's not even an established file format) so I'm having to include complicated ffmpeg instructions in a README to get people to play it, but I think it all adds to the charm.
Funnily enough after searching for days for how to fit the original episode in a floppy (tried low-bitrate MP3, Opus and AAC, all of which fail at the task), and after discovering Codec2 almost by chance, I only then came across an article called "Codec2: a whole Podcast on a Floppy Disk" [2] which I probably would've found if I had started by searching "podcast in a floppy".
[1] https://github.com/drowe67/codec2
[2] https://auphonic.com/blog/2018/06/01/codec2-podcast-on-flopp...
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Using AI to compress audio files for quick and easy sharing
1.5 kbps speech is impressive, I wonder how it compares with Codec2 https://github.com/drowe67/codec2
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minimodem - general-purpose software audio FSK modem
David Rowe has some information on doing this kind of testing here: https://github.com/drowe67/codec2/blob/master/README_fsk.md
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can Lora handle low quality voice?
You have a chance with codec2, but I wouldn't expect it to handle any real-time communication. This codec only works for voice, for anything else it's trash.
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Low bandwidth mode for Signal?
You also got some samples available at http://www.rowetel.com/codec2.html
- How to convert audio to codec2?
- I created a floppy disk VCR that plays full length films (like garbage) with the help of a Pi and a custom x265 codec. I call it the LimaTek Diskmaster
SVT-AV1
- FFmpeg now supports JPEG XL and AVIF: how to convert images
- Recommended rate control settings for SVT-AV1 streaming
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Converting big video library with av1
I wrote a little script that uses ffmpeg with settings similar to those in the guide, and then another ffmpeg run to extract the subtitles as vtt. I would be happy to share more of my settings if you are interested. Of course, your needs and mine may differ.
- No library usage documentation for SVT-AV1?
- AOM or SVT-AV1 on 5950X? video is 8K 60fps 60Mbit/s
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SVT-AV1 HDR Encoding (libsvtav1 with ffmpeg)
How about use the parameter "HighDynamicRangeInput" with command line "--enable-hdr 1"? It's from the official page: https://github.com/AOMediaCodec/SVT-AV1/blob/master/Docs/Parameters.md
- Scalable Video Technology for AV1 (SVT-AV1 Encoder and Decoder)
- AV1 Video Codec
- Seems like the SVT-AV1 documentation issue #1753 about missing presets explanation is fixed now. And it seems like the preset 0, 1 and 2 are the same thing. Plus tons of other useful encoding guidelines (like how to tune for animation etc.).
- H.264 is magic: a technical walkthrough
What are some alternatives?
minimodem - general-purpose software audio FSK modem
obs-amd-encoder - AMD Advanced Media Framework Encoder Plugin for Open Broadcaster Studio
waifu2x - Image Super-Resolution for Anime-Style Art
rav1e - The fastest and safest AV1 encoder.
lyra - A Very Low-Bitrate Codec for Speech Compression
jukebox - Code for the paper "Jukebox: A Generative Model for Music"
SVT-HEVC - SVT HEVC encoder. Scalable Video Technology (SVT) is a software-based video coding technology that is highly optimized for Intel® Xeon® processors. Using the open source SVT-HEVC encoder, it is possible to spread video encoding processing across multiple Intel® Xeon® processors to achieve a real advantage of processing efficiency.
community - libaom User Wiki
kvazaar - An open-source HEVC encoder
SVT-VP9 - SVT VP9 encoder. Scalable Video Technology (SVT) is a software-based video coding technology that is highly optimized for Intel® Xeon® processors. Using the open source SVT-VP9 encoder, it is possible to spread video encoding processing across multiple Intel® Xeon® processors to achieve a real advantage of processing efficiency.
nvidia-vaapi-driver - A VA-API implemention using NVIDIA's NVDEC