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Reduction Of MOV File Bitrate

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Chuose Osemeka
Reduction Of MOV File Bitrate
on Mar 17, 2017 at 6:04:43 pm

Gurus

Can I ask 2 questions.

1, how do you reduce the bit rate of MOV files when rendering them in either AME or AFX?

2, when you render in AME you get the option to REWRAP.
What exactly is rewarp and what are the pros and cons?

Thanks all in advance


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Dave LaRonde
Re: Reduction Of MOV File Bitrate
on Mar 17, 2017 at 6:11:52 pm
Last Edited By Dave LaRonde on Mar 17, 2017 at 6:19:25 pm

When you reduce the bit rate, you throw away information. It all depends on your tolerance of a degraded image.

If we knew why you were asking, we could give better advice.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Chuose Osemeka
Re: Reduction Of MOV File Bitrate
on Mar 17, 2017 at 10:56:27 pm

When you reduce the bit rate, you throw away information. It all depends on your tolerance of a degraded image.
Yeah, makes sense.

If we knew why you were asking, we could give better advice.
I noticed that I some how rendered a MOV file and it was smaller than I usual.
When I checked the bitrate it was smaller.

2, when you render in AME you get the option to REWRAP.
What exactly is rewarp and what are the pros and cons?

Any hints on this?


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Dave LaRonde
Re: Reduction Of MOV File Bitrate
on Mar 17, 2017 at 11:13:41 pm

"Rewrap" is the process of putting a movie in a different media container.
For example, converting a Quicktime file (".mov") into an MXF File (".mxf").

Some applications can only read files in certain media containers. That's when you rewrap.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Chuose Osemeka
Re: Reduction Of MOV File Bitrate
on Mar 18, 2017 at 1:21:21 am

"Rewrap" is the process of putting a movie in a different media container.
For example, converting a Quicktime file (".mov") into an MXF File (".mxf").

Some applications can only read files in certain media containers. That's when you rewrap.


Thanks 😎


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Kevin Camp
Re: Reduction Of MOV File Bitrate
on Mar 17, 2017 at 11:38:37 pm

[Chuose Osemeka] "I noticed that I some how rendered a MOV file and it was smaller than I usual.
When I checked the bitrate it was smaller.
"


.mov is just a container, as such, it can contain media that is encoded with a number different codecs. i.e. you can have a .mov that is encoded wth the lossless animation codec (which usually create very large files) or a .mov that is encoded with the h.264 codec (which creates much smaller files), and there are many other codecs available for quicktime files.

rewrapping is for when you have a file (in a container like .mov or .mxf) that is encoded with a codec that is available for another container. say you have a .mxf that is encoded with avid's dnxhd codec, but you need it to be .mov. you can rewrap it from .mfx to .mov.

wrapping has two advantages. a big advantage is if the codec is a lossy codec (like h.264, and many others) it won't lose any more data by re-encding it. it simply rewrites the media data to the new container format. another advantage is that since it's not re-encoding, it is much faster.

Kevin Camp
Art Director
KCPQ, KZJO & KRCW


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Chuose Osemeka
Re: Reduction Of MOV File Bitrate
on Mar 18, 2017 at 1:23:04 am

wrapping has two advantages. a big advantage is if the codec is a lossy codec (like h.264, and many others) it won't lose any more data by re-encding it. it simply rewrites the media data to the new container format. another advantage is that since it's not re-encoding, it is much faster.


thanks 😎

So rewarp is good excellent


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Kevin Camp
Re: Reduction Of MOV File Bitrate
on Mar 19, 2017 at 9:20:56 pm

Re-wrap is good, but only when transcoding a file from one wrapper to another, but keeping the codec and compression the same.... like converting an mpeg-2 in a .avi wrapper to an mpeg-2 in a .mov wrapper. You wouldn't use it to convert a prores .mov to an h.264 .mp4.

Kevin Camp
Art Director
KCPQ, KZJO & KRCW


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