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Topic: Opus .ogg vs .mp4 container? (Read 517 times) previous topic - next topic
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Opus .ogg vs .mp4 container?

Opus inside mp4 seems improving - here's qaac support https://github.com/nu774/qaac/commit/8c8dcfc7b3977f9419d059c32463213966c98dcb

I've been using both the ogg (for opus) and mp4 container (for aac) and the corresponding tools opusenc/opustags, mp4box. For my simple offiine encoding and tagging purposes, playing on mobile devices both seem to be sufficient - actually, gpac is a bit feature overkill.

Except for app support, is there a significant difference between these containers for an opus stream?

I'm just wondering and want to start a standards flame war - so please be kind :-)
 

Re: Opus .ogg vs .mp4 container?

Reply #1 –
As you may know, Opus in ISOBMFF has been supported by big players such as ffmpeg, chromium, and firefox before qaac added support for it. qaac is nothing here.

> Except for app support, is there a significant difference between these containers for an opus stream?

Ogg container is more popular for opus but ill-suited for video. That's why they had to standardize Opus in MPEG-TS and ISOBMFF.
Technically, as a container format, Ogg is more like MPEG-TS than MP4.
Ogg doesn't have global seek table which makes it sub-optimal for seeking (but not as bad as MP3).
If I remember correctly, (in the past) fb2k didn't support seeking Ogg files via HTTP because of this.
Ogg is more suitable for streaming or real-time recording. Also, it's simpler than MPEG family containers.