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Hothead1030
Participating Frequently
October 1, 2020
Question

File size mp4 and mov and what to upload

  • October 1, 2020
  • 3 replies
  • 1075 views

I have a 20 second clip original format in mov. Exporting with adobe media quicktime adobe stock uhd creates a 1.8GB file, export to mp4 with adove stock uhd creates a file 0.1 GB.

That's a lot of compression difference.

Is it recommend to upload the mov. file ,the mp4 file or both to adobe stock?

This topic has been closed for replies.

3 replies

H
Hothead1030Author
Participating Frequently
October 3, 2020

[Windows Mail junk code removed by moderator.]

 

Thanks Matt, those adobe stock presets were used. Work well with H.264 (MP4) but problem relates to Quick Time (mov) files ballooning in size.

 

Sent from Mail for Windows 10

 

 

MatHayward
Community Manager
MatHaywardCommunity Manager
Community Manager
October 2, 2020

If you have Premiere Pro to use, there are export settings specifically designed for and labeled for Adobe Stock exports that optimize your files for Adobe Stock. Well worth checking out in my opinion. 

 

Good luck,

 

Mat Hayward 

T
Test Screen Name
Legend
October 1, 2020

Since each re-encoding lowers quality, it is getting you further from the original. I observe in https://helpx.adobe.com/uk/stock/contributor/help/video-requirements.html it says "Use a professional grade transcoding tool such as Adobe Media Encoder to retain original video quality and avoid recompression whenever possible."

Still, it is a very big difference. What are the original and compressed frame size and CODEC? How did you generate the MOV in the first place? I've seen this sort of size from After Effects, but that's for making intermediate files.

H
Hothead1030Author
Participating Frequently
October 2, 2020

Shot on Lumix S1 mov 4k, 10bit, 150, M24p format. Post processing done using latest adobe Premiere Pro and media encoder, everything in Windows.

Adjusted with input LUT, Alexa_default _LogC2 Rec709 with minor tweeks, then stablized using warp stabalizer, then created MP2 and MOV files using the Adobe Stock presets stated in my question.

Original MOV file grew from 0.4 GB to 1.8 GB MOV and 0.1 GB MP4 on using adobe transcoding.

 

Thanks

 

Here are the technical detais of the final MOV and MP4  files
Type: QuickTime Movie
File Size: 1.75 GB
Image Size: 3840 x 2160
Frame Rate: 23.976
Total Duration: 00:00:22:12
Pixel Aspect Ratio: 1.0
Alpha: None
Color Space: Rec. 709
Color Space Override: Off
Input LUT: None

Created with: Adobe Premiere Pro 2020.0 (Windows)

QuickTime Details:
Movie contains 1 video track(s), 0 audio track(s), 0 closed caption track(s), and 1 timecode track(s).

Video:
There are 540 frames with a duration of 1001/24000ths.

Video track 1:
Duration is 0:00:22:12
Average frame rate is 23.98 fps

Video track 1 contains 1 type(s) of video data:

Video data block #1:
Frame Size = 3840 x 2160
Compressor = Apple ProRes 422 HQ
Quality = Most (5.00)

Timecode:
Timecode track 1 contains 1 type(s) of data:

Timecode data block #1:
Start Time = 00:00:00:00
Reel name =

 

For the MP4


Type: MPEG Movie
File Size: 107.74 MB
Image Size: 3840 x 2160
Frame Rate: 23.976
Total Duration: 00:00:22:12
Pixel Aspect Ratio: 1.0
Alpha: None

Created with: Adobe Premiere Pro 2020.0 (Windows)

Video Codec Type: MP4/MOV H.264 4:2:0

 

 

 

  

T
Test Screen Name
Legend
October 2, 2020

You left out the video bitrates, which is pretty much the most important data, but forced me to go to the reference, which is no bad thing. 

According to Wikipedia (https://en.wikipedia.org/wiki/Apple_ProRes) the expected bitrate for 3840 x 2160 at 25 frames per second is 492 Mbit/sec which is about 62 MB per second.
So 23 seconds might weigh in at 1400 MB / 1.4 GB. So your file size is as expected for this compression method. As Wikipedia says "ProRes is a line of intermediate codecs, which means they are intended for use during video editing, and not for practical end-user viewing"

On the other hand, MP4 is designed for delivery to the end customer.

 

I think a key question is "what is the original quality". A small sample of reviews suggests the Lumix S1 may have a bitrate of 72Mbps. It's arguably pointless to increase this as high as 500Mbps, it's like blowing up a small picture to large. Or is it? I've run the theoretical numbers, which check out, but I'd be much more interested to know what video contributors are actually using to submit.

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