• Global community
    • Language:
      • Deutsch
      • English
      • Español
      • Français
      • Português
  • 日本語コミュニティ
    Dedicated community for Japanese speakers
  • 한국 커뮤니티
    Dedicated community for Korean speakers
Exit
0

H.264 format resulting in huge file size

Community Beginner ,
Dec 21, 2018 Dec 21, 2018

Copy link to clipboard

Copied

All of the H.264 presets are resulting in huge file sizes. I've been asked to reduce the file size of some videos, because they're stored on a server and are cumbersome. I am trying to use Adobe Media Encoder to compress all of them simultaneously. They're webinars, so they're only slides and audio. The video that I'm focusing on for an example is almost 5000MB even on the low bitrate preset. I need to get that down to under 400MB. What am I missing? Why the insane file size?

Screen Shot 2018-12-21 at 12.10.34 PM.png

Views

3.1K

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines

correct answers 1 Correct answer

Community Beginner , Dec 25, 2018 Dec 25, 2018

The first image you uploaded has a 4.2Mbps target bitrate and the second has a 0.2Mbps target bitrate.

That's 21x the file size per second right there! Reduce your target bitrate to reduce the file size. If you want to maintain quality and there's no video (only sides) then you could reduce the frame rate on the output and you'll end up with fewer but higher quality frames at a comparable bitrate.

Votes

Translate

Translate
Guide ,
Dec 21, 2018 Dec 21, 2018

Copy link to clipboard

Copied

If I see it correctly you are trying to compress 2,5h video to 400mb file size. I guess without changing resolution any of presets will give you that. Yopu have to chose any preset with your native resolution and then play with some drasticly lover bitrate. There s no other way.

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Community Beginner ,
Dec 21, 2018 Dec 21, 2018

Copy link to clipboard

Copied

Well, check this out. This is the same type of video (just slides and audio) from the same source. It's only 1.5 hours, but it's only 200 MB on the medium bitrate. So I shouldn't be getting something as high as 5000 MB.

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Community Beginner ,
Dec 21, 2018 Dec 21, 2018

Copy link to clipboard

Copied

Screen Shot 2018-12-20 at 11.24.13 AM.png

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Community Beginner ,
Dec 25, 2018 Dec 25, 2018

Copy link to clipboard

Copied

The first image you uploaded has a 4.2Mbps target bitrate and the second has a 0.2Mbps target bitrate.

That's 21x the file size per second right there! Reduce your target bitrate to reduce the file size. If you want to maintain quality and there's no video (only sides) then you could reduce the frame rate on the output and you'll end up with fewer but higher quality frames at a comparable bitrate.

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Guide ,
Dec 26, 2018 Dec 26, 2018

Copy link to clipboard

Copied

LATEST

That exactly what we see on those screens. First is as you said with 4,2mbps and second with o,2mbps. Also on first screen we have 24fps and on second 7,5fps - so more than 3 times less to compress.
So:
lower bitrate + lower fps = smaller file size

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines