FORUMS: list search recent posts

HIghe Quality VS Size

COW Forums : Compression Techniques

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Yoni Zetz
HIghe Quality VS Size
on Aug 19, 2014 at 9:27:52 am

Greetings video lovers,
im looking for any creative ideas regarding the exporting (creating or converting) of short (30 sec. + -) videos created in AE in the smallest size possible. What factors should i consider when exporting (bitrate, format, codec etc...) if anyone has any suggestions i will be very greatfull...
thanks a bunch.

Return to posts index

Craig Seeman
Re: HIghe Quality VS Size
on Aug 19, 2014 at 5:17:24 pm

[Yoni Zetz] "What factors should i consider when exporting"

The first is the target. Settings used for someone with a fiber channel web connection would not be the same for someone watching on a three year old Android phone.

[Yoni Zetz] " the smallest size possible."

Does this mean you don't care about quality at all? There's size vs quality vs compatibility tradeoffs which is why you must know your target. The closer you get to one size fits all the worse the quality may be. Maybe that's OK but you do need to understand that.

As to target for example:
A 30 second heavy motion graphics selling an upscale product might be very different than a 30 second simple static graphics targeting a poor working class community with a service by a gov't agency, would be entirely different settings given their likely viewing devices and internet connections available to them.

Return to posts index

Yoni Zetz
Re: HIghe Quality VS Size
on Aug 20, 2014 at 6:36:03 am

first of all, thanks for the response.

This is the deal : it is heavily graphics created in 3d and animated in After and played via Flash player with interaction with a mobile device. from tests we did on avrage computers with a pretty simple (not 3d and little animation) video, the computer had a hard time playing it with flash. now we might move to a different platform HTML 5 but either way the idea is to creat the smallest videos in size with the best looking results. pixilazation in uncceptable.

Thanks a million for the help. Sorry for my unperfect English.

Have a great day.

Return to posts index

Ivan Myles
Re: HIghe Quality VS Size
on Aug 20, 2014 at 11:30:59 pm
Last Edited By Ivan Myles on Aug 20, 2014 at 11:50:41 pm

H.264/MP4 will provide the best tradeoff between quality and file size. Encoder settings depend on several factors:
  • Level (set this first if using AME): L3.1 should meet most needs; use L4.1 for 1080p

  • Resolution (Width x Height): reduce as much as possible if bitrate is a concern; 480p to 720p should meet most needs

  • Frame Rate: typically 24-30fps; avoid 50/60fps when bandwidth is constrained

  • Target Bitrate: determine the best setting based on the following calculation and bpp guidelines:

    Bitrate (Mbps) = Width * Height * FPS * bpp / 1024 / 1024

  • bpp = 0.07 for minimally acceptable quality
    bpp = 0.125 for OK quality (Apple standard)
    bpp = 0.15 - 0.20 for good quality web streaming
    bpp = 0.35 - 0.40 for very good quality local playback
    bpp = 0.65 - 0.80 for Blu-ray quality

  • Maximum Bitrate: typically 1.5x Target Bitrate; could also just set to max for the Level

  • Key Frame Distance: Auto should be OK; set it to half the frame rate for high action footage

  • Profile: Baseline will play easily on most devices; Main and High profiles provide better compression

  • Passes: 2-pass VBR provides better results; single-pass is easier to decode (a consideration for older devices)

  • Use AME instead of the AE render queue for 2-pass encoding. Go to the Multiplexer tab and set Stream Compatibility to Standard. Export a short test clip at a few different settings and compare results.

    Return to posts index

    << PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
    © 2019 All Rights Reserved