Losing image quality after importing to PP

[jans76253362]

I sometimes film with my Iphone 7 (often in 4 K) and the clips looks often very good when I look at them on my computer and big screen tv (50 inch).

I usually convert the m4v-format to mp4.format before importing them to Premier Pro.

But.

Very often the image quality goes down (gets grainy) after importing to PP. But sometimes the quality is ok....

What may I be doing wrong?

[eikonoklastes]

1. How are you converting them to MP4?

2. After you convert them, do they look as expected through a media player, before bringing them into Premiere?

[jans76253362]

Thanks for the reply:

1. With "Free MP4 converter"

2. Yes the look ok. The problem only occurs now and then.

[R Neil Haugen]

"Looking grainy" sounds like video noise. Which could be exacerbated on transcoding depending upon the settings used.

In other words more noticeable in the t-codes.

When converting VFR into CFR, I use Handbrake with a preset that is "near placebo" for compression so that it doesn't shrink the resultant file any smaller than original media was. Which works rather well.

Neil

[excited_Genie16B8]

What may I be doing wrong?

I film with my Iphone

[MyerPj]

BTW: You can drop an mk4 file onto Media Encoder and then convert to any format it supports. You could save it to Prores or Cineform if you want a file that edits very smoothly. ME 13.1.3 (Windows)