Opus is better than AAC for video ?

[Aug]

Hello. Thanks for reading my topic.
I want convert some videos to H.264 and for some videos the audio will be copied instead converting and for others files the sound will be converted.
AAC is the more used for H.264.
However is the best choice if the user want the sound good quality with less file size ?
Opus has the same quality using less birate if compared with AAC.
Also HE-AAC has much less bitrate than AAC, but has same good quality for video H.264. Not is simple install software for enconding HE-AAC in Linux.
FLAC and other similar codecs has more high file size.
Have an better lossy codec than AAC for H.264 ?

Have an nice week.

[videoAI]

Audio codec choices for H.264 video encoding, focusing on quality, file size, and performance.

## Audio Codec Comparison

| Codec | Quality | Bitrate Efficiency | Compatibility | Best Use Case |
|-------|---------|-------------------|--------------|--------------|
| Opus | Excellent | Best | Good | High-quality audio with minimal file size |
| AAC | Very Good | Good | Excellent | Widely supported, balanced quality |
| HE-AAC | Good | Better than AAC | Limited | Low bitrate scenarios |
| FLAC | Lossless | Worst | Limited | Archival, professional audio |

## Key Insights

### Codec Recommendations
- Opus is the superior choice for high-quality audio with minimal file size
- AAC remains the most universally compatible option
- HE-AAC is challenging to implement in Linux

### FPS Considerations
- Modern codecs like H.264 do detect differences between 30 fps and 60 fps
- Important settings for 60 fps videos:

1. Increased bitrate
2. Adjusted keyframe interval
3. Potential use of variable bitrate (VBR)

[Aug]

Thanks for all replies.
In moment not is possible for me test how compile ffmpeg. I only use ffmpeg4 and the current version in Ubuntu repository not does HE-AAC.
HE-AAC has better quality than AAC and Opus ?
HE-AAC file size save is irrevelant if compared with AAC ?

Thanks very much for replying.
I see information more or less Opus 128 kbps is the same quality as AAC 160 kbps. Is it true ?
If the source file is AAC 256 kbps converting to Opus 168 kbps has much lose or is the same quality ?
Well ... need to be much sensible to hear any differences between AAC 256 kpbs and 384 kbps.

If the AAC is 128 kbps converting to Opus 64 or 96 kbps lose much quality ?

[jagabo]

If you're working with high definition video the size of the audio is pretty immaterial. Stick with AAC or AC3 for compatibility.