High/Slow motion -> bitrate?

[su]

Hi!

Can someone explain me the relation between high/slow motion and the bitrate?

I've increased my bitrate to try to avoid some digital squares that appears in high motion scenes (i don't know if it works), but the slow motion scenes now seems stranges (the image isn't continuous, it seems that it had a little "scene change" or a "jump" for each 3 seconds..). Is this related with the bitrate?

[mats.hogberg]

Sounds more like a frame rate problem to me...

/Mats

[su]

But it strange ... because sometimes I haven't that 'jumps' and it seems that it start to appears when I increased the bit rate.

[DJRumpy]

You've probably exceeded the limits of your player. SVCD for example, is good for up to 2778 kbit/sec. If you exceed the limits of your DVD player, it can cause jerky playback. Many people experience this when they are making xVCD's, or xSVCD's. Try finding your player in the player lists (see DVD Players to the left) to see if the bitrate limits are known, and stick within those limits.

What format are you converting to?

[EddyH]

Tried switching to VBR see if that fixes it? Your fast scenes will then get more bits and the slow scenes more like the lower level, so less jumps.

Some encoding methods don't like having 'too many' bits, eg a certain mp3 encoder goes a bit mental if you try recording an 'easy' sound source with >192k.. but loves complex stuff.

[DJRumpy]

That is not entirely accurate. MP3 encoding basically chops off frequencies that are normally beyond what the human ear can easily hear. As your bitrate is reduced, the range of frequencies that is filtered, drops farther into the range of human hearing, until it becomes very noticable on low bitrate encodings. If you encode a sound sample at a high bitrate, your basically just retaining more of the original source. A high enough bitrate will essentially give you a 1:1 copy. No more, no less. It will not break or confuse any encoder. The beauty of VBR is simply the reduction in size, without a drop in quality, if it's encoded properly.