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What is the Optimum Bitrate to use on SUPER for FLV Conversnion to AVI
#1
13 Feb 2010 @ 15:47
kenshiree
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Newbie
I have been told to use the same bitrate on SUPER as is reflected on the original FLV file... The Default bitrate though for AVI/mp4 condec is 1008... I have taken the same flv file and converted it using 388 (the original flv bitrate) and then used the 1008... The quality of the picture was significantly better with the 1008...
If this is always the case, why would you ever use the same rate as the original file if you can get a better quality picture using the 1008 default rate
If this is always the case, why would you ever use the same rate as the original file if you can get a better quality picture using the 1008 default rate
thanks, Ken
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#2
13 Feb 2010 @ 16:27
It's not as simple or straightforward question to answer.
It depends on variables such as the quality of the original,
and the resolution chosen for the new file.
Are you encoding an avi file with the same resolution?
1008 is just a compromise somebody came up with.
A better method for this kind of encode is to use the Xvid CQ
(constant quality mode). This is better because it automatically
adjusts the bitrate to maintain a constant quality no matter
how much you vary the resolution.
Problem is, I don't think Super gives you access to the CQ mode.
Why don't you encode them with some other app?
Virtualdub works good. Use it with FLV Extract and FFDshow
to enable the FLV codec.
It depends on variables such as the quality of the original,
and the resolution chosen for the new file.
Are you encoding an avi file with the same resolution?
1008 is just a compromise somebody came up with.
A better method for this kind of encode is to use the Xvid CQ
(constant quality mode). This is better because it automatically
adjusts the bitrate to maintain a constant quality no matter
how much you vary the resolution.
Problem is, I don't think Super gives you access to the CQ mode.
Why don't you encode them with some other app?
Virtualdub works good. Use it with FLV Extract and FFDshow
to enable the FLV codec.
This message has been edited since its posting. Latest edit was made on 13 Feb 2010 @ 18:10
#3
13 Feb 2010 @ 21:14
Originally posted by davexnet:
It's not as simple or straightforward question to answer.
It depends on variables such as the quality of the original,
and the resolution chosen for the new file.
Are you encoding an avi file with the same resolution?
1008 is just a compromise somebody came up with.
A better method for this kind of encode is to use the Xvid CQ
(constant quality mode). This is better because it automatically
adjusts the bitrate to maintain a constant quality no matter
how much you vary the resolution.
Problem is, I don't think Super gives you access to the CQ mode.
Why don't you encode them with some other app?
Virtualdub works good. Use it with FLV Extract and FFDshow
to enable the FLV codec.
thanks, Ken
#4
13 Feb 2010 @ 21:17
Super provides the bitrate and resolution of the original flv file that you are converting. So I set the AVI resolution to be about the same as the original FLV. I do the same for bitrate. I am unclear as to how the resolution and bitrate interact with each other.
I understand that the higher Bitrate uses more space but don't comprehend the relationship between the two
I understand that the higher Bitrate uses more space but don't comprehend the relationship between the two
thanks, Ken
#5
13 Feb 2010 @ 23:54
It's quite a straightforward relationship.
For any given resolution, the quality (in general) gets
worse as the bitrate is lowered.
Of course the inverse is true.
For a given bitrate, the quality (in general) gets worse as the
resolution is made bigger.
This is why I like xvid's CQ mode for encoding. You don't give it a
bitrate at all, you start it off with a CQ number (4, the default
is a good place to start) and as the file is being encoded, xvid
will vary the bitrate in order to maintain the quality no matter
now much the content of the material changes. (For example,
high detail, fast motion, need more bitrate,etc,etc)
Hope this makes it clearer.
For any given resolution, the quality (in general) gets
worse as the bitrate is lowered.
Of course the inverse is true.
For a given bitrate, the quality (in general) gets worse as the
resolution is made bigger.
This is why I like xvid's CQ mode for encoding. You don't give it a
bitrate at all, you start it off with a CQ number (4, the default
is a good place to start) and as the file is being encoded, xvid
will vary the bitrate in order to maintain the quality no matter
now much the content of the material changes. (For example,
high detail, fast motion, need more bitrate,etc,etc)
Hope this makes it clearer.
#6
14 Feb 2010 @ 9:59
I always thought that a higher resolution would give a better quality picture.. That is why on camera's you always use the highest resolution... What am I missing here.
Also, is Xvid the name of the program that you are referring to in regards to the CQ setting.
Thank you for your replies
Also, is Xvid the name of the program that you are referring to in regards to the CQ setting.
Thank you for your replies
thanks, Ken
#7
14 Feb 2010 @ 10:45
The actual resolution you get from your camera is one thing,
what happens when you encode (bitrate Vs. resolution) is another
consideration.
Higher resolution can provide more detail. That's *potentially* better
quality. For example, if your digital camera captures at 720P,
then you actually get that amount of detail ie. 1280*720.
However, if you take a smaller video and *enlarge* it to 720P,
what have you got now? You haven't got any more detail, you just
made it bigger- possibly it looks worse now.
Xvid is actually one of the common codecs (along with DivX). They are
used in AVI files. The reason they're popular is that many
standalone DVD players can play them directly (no conversion
required)
I don't think Super is a good program for beginners. Let me look
around, I'll see if I can find something better.
what happens when you encode (bitrate Vs. resolution) is another
consideration.
Higher resolution can provide more detail. That's *potentially* better
quality. For example, if your digital camera captures at 720P,
then you actually get that amount of detail ie. 1280*720.
However, if you take a smaller video and *enlarge* it to 720P,
what have you got now? You haven't got any more detail, you just
made it bigger- possibly it looks worse now.
Xvid is actually one of the common codecs (along with DivX). They are
used in AVI files. The reason they're popular is that many
standalone DVD players can play them directly (no conversion
required)
I don't think Super is a good program for beginners. Let me look
around, I'll see if I can find something better.
#8
14 Feb 2010 @ 11:07
Thank you again.
I checked SUPER and Xvid is one of the codec options that can be used for AVI conversion however you still have to chose between video scale, and bitrate etc. There is no CQ otpion etc
I checked SUPER and Xvid is one of the codec options that can be used for AVI conversion however you still have to chose between video scale, and bitrate etc. There is no CQ otpion etc
thanks, Ken
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