Question / Help x264 Which is better superfast high bitrate or veryfast low bitrate?

[JhoNConners]

In x264, I know in terms of quality, veryfast is better, but in terms of speed and quality, which is better in CBR, veryfast on say 5000 bitrate or superfast on something high like 30000?

 

[Narcogen]

Are you recording or streaming?

If streaming, 5000 unless you're streaming to Youtube. Twitch has a 6000 limit unless you're a partner.

If you're recording, use CRF rate control (or CQP with NVENC) rather than a static bitrate.

When recording if you specify a bitrate you'll use up the same disk space even on static screens. Static bitrates are best for streaming.

CRF 23 is a high quality setting, CRF 14 is close to "indistinguishable" quality.

Unless you need multiple audio tracks or other options, it may be best to go into Simple mode and choose from the available quality presets.

 

[JhoNConners]

Are you recording or streaming?

If streaming, 5000 unless you're streaming to Youtube. Twitch has a 6000 limit unless you're a partner.

If you're recording, use CRF rate control (or CQP with NVENC) rather than a static bitrate.

When recording if you specify a bitrate you'll use up the same disk space even on static screens. Static bitrates are best for streaming.

CRF 23 is a high quality setting, CRF 14 is close to "indistinguishable" quality.

Unless you need multiple audio tracks or other options, it may be best to go into Simple mode and choose from the available quality presets.

Im recording. But CRF uses more cpu than CRB though doesnt it?

 

[Narcogen]

All the suggested default modes for local recording use a quality setting rather than a fixed bitrate. If you can't get good performance at a given quality setting you can reduce something (frame size, frame rate, visual effects, quality setting) but the answer isn't to devote the same number of bits to a static frame as to fast motion, which is what CBR does. It's used for streaming because streaming services require it, not because it's better quality or more efficient (because it isn't).

 

[JhoNConners]

All the suggested default modes for local recording use a quality setting rather than a fixed bitrate. If you can't get good performance at a given quality setting you can reduce something (frame size, frame rate, visual effects, quality setting) but the answer isn't to devote the same number of bits to a static frame as to fast motion, which is what CBR does. It's used for streaming because streaming services require it, not because it's better quality or more efficient (because it isn't).

yeah, it was just a side question. But rendering in vegas or premiere in a CBR mode is usually 2x the speed of VBR, which is why i was asking.

And thanks.