Poor Export Quality

bartoszwozniak · 2 Aug 2016

Hi everyone, I am really confused and concerned by the fact that Adobe Premiere is significantly lowering the quality of my videos. I don't know what it is that causes the problem to be honest, whether it is the frame rate that isn't quite right or what, but the quality in certain shots in this video is just so poor and I cannot fix it.

Could someone take a look and maybe advise on what is causing it?

Jayst84 · 2 Aug 2016

Probably help if you tell us what your process is. What are you shooting in, what are you exporting to, how are you doing it?

Which shots are you concerned about? Nothing looked too bad on a quick watch then.

bartoszwozniak · 2 Aug 2016

Jayst84 said:
Probably help if you tell us what your process is. What are you shooting in, what are you exporting to, how are you doing it?

Which shots are you concerned about? Nothing looked too bad on a quick watch then.

Hi James, thanks very much for the reply.

Yes, so the vast majority of the video was shot on a DJI Phantom 3 Advanced. There is a number of shots I am concerned about in here, especially the one from directly above around 23secs in, when in 1080p and full screen. It was exported to mp4 with h264 with the default settings.

st599 · 3 Aug 2016

bartoszwozniak said:
Yes, so the vast majority of the video was shot on a DJI Phantom 3 Advanced. There is a number of shots I am concerned about in here, especially the one from directly above around 23secs in, when in 1080p and full screen. It was exported to mp4 with h264 with the default settings.

The issue is that H.264 reduces bitrate by estimating motion, and the motion of water is pretty random. The only way to really fix it is to increase the bitrate significantly or to shoot in such a way that the water is out of focus.

If you can output to a I-frame codec (AVC-Intra, ProRes...) then you won't have motion estimation but the file will be bigger.

bartoszwozniak · 3 Aug 2016

st599 said:
The issue is that H.264 reduces bitrate by estimating motion, and the motion of water is pretty random. The only way to really fix it is to increase the bitrate significantly or to shoot in such a way that the water is out of focus.

If you can output to a I-frame codec (AVC-Intra, ProRes...) then you won't have motion estimation but the file will be bigger.

Thank you very much for that advice! I do a lot of stuff with water, so actually this is going to be really helpful. I will re-export it in the I-frame codec and have a look at it. Thank you.

st599 · 3 Aug 2016

bartoszwozniak said:
Thank you very much for that advice! I do a lot of stuff with water, so actually this is going to be really helpful. I will re-export it in the I-frame codec and have a look at it. Thank you.

Vimeo will turn it to H.264 with I,B and P frames for their site, but it will be better to use an I frame codec followed by an IBP codec rather than an IBP followed by their IBP which is what you're doing now - it is currently motion estimating twice.