pixellation

[#1]

I have some footage that I shot with a GoPro8, it's good quality as far a GoPro can go if I watch it before editing. After exporting (60 fps, 16Mbps target bitrate, H.264 encoding, 4K resolution) I can see pixellation, as in the light sky of attached picture. I have tried increasing the target bitrate, but to no avail. What's the cause and how can I solve the problem?

[#2]

I have some footage that I shot with a GoPro8, it's good quality as far a GoPro can go if I watch it before editing. After exporting (60 fps, 16Mbps target bitrate, H.264 encoding, 4K resolution) I can see pixellation, as in the light sky of attached picture. I have tried increasing the target bitrate, but to no avail. What's the cause and how can I solve the problem?

[#3]

...so we dont have to download unknown files: we help you, you help us. Thanks! 

[#4]

it's good quality as far a GoPro can go

That is your answer.

Not just the sky but the entire pictuer does not look that great.

Please upload original clip for testing.

[#5]

I'll share the Google Drive files because YouTube would modify them further.

Original GoPro footage

Export Premiere Pro

[#6]

Its not 4K but 1080p.

change your sequence setting to 1080p

Also original is 50p export is 60p. Might want to correct that.

Please post export settings.

[#7]

Sequence settings are:
1920 x 1080
00;44;47;09, 100,00 fps
48000 Hz - Stereo

I created the sequence by dragging one clip onto the timeline, it happens to have been 100 fps.

Export settings are as follows:

1920 * 1080 (1,0) - 60 fps

Progressive VBR 2 pass

Target 16 Mbps, Max 40 Mbps

AAC, 320 kbps, 48 kHz, Stereo

The footage was shot in 50 and 100 fps.

[#8]

I gather the 100 fps clip is for slomo.

I would go for a 50p sequence and export to 50p.

[#9]

Do you think this is the reason why the pixellation became more evident after exporting?

[#10]

You need to do some testing yourself.

If I follow my own advice I see no pixalation although the original footage does not have great image quality.

If you have Protune or what ever turned on in the GoPro turn that off.

[#11]

Do you think this is the reason why the pixellation became more evident after exporting?

That´s not the main reason but mis-matching those settings will give other quality problems. The main reason is too low bit rate combined with the not-so-great H264 encoder that are shipped with Premiere Pro. It can be great sometimes but fails big time in videos like this with water and lot´s of fine details such as lot´s of reed straws that moves. The original footage has a bit rate of approx 40 Mbps, so try to encode with a bitrate closer to that. 16 Mbps as target won´t cut for this kind of footage.

I get great results when i use TMPGEnc Movie Plug-in AVC for Premiere Pro. Download a trial and test for 14 days without any restrictions or watermarks.

[#12]

That plugin looks useful ... hmmm.

Neil