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steve88man
Participant
December 31, 2017
Question

In PE18 quality issue with exported H.264

  • December 31, 2017
  • 2 replies
  • 368 views

I am exporting some edited AVI DV interlaced video to H.264 format and seeing "stuttering" in the encoded video. Every 30-60 seconds I will see frames jump back and forth for 5 to 10 frames. It seems to happen in random places and doesn't necessarily follow a lot of motion in the video. The settings I am using are:

"same as source" checked for frame rate, width/height, field order, aspect, tv standard, profile, level

"render at maximum depth" checked

VBR 2-pass

Target bit rate: 4 mbps

Max bit rate: 17.5 mbps

keyframe distance: not checked

Time interpretation: FrameSampling

I am using Windows Media Player to view the video. I have tried playing the video on a 2nd computer without a graphics card and I see the same issue. I think the graphics card may be used during encode but I don't know how to disable that to experiment.

Any suggestions would be appreciated.

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    2 replies

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    Steve Grisetti
    Legend
    January 1, 2018

    The conversion of these files to WMVs kind of mucks things up a bit. Aside for Windows MovieMaker, pretty much nobody edits with WMV files, and most editors don't play well with them. Premiere Elements can work with them if they match a standard video editing spec -- but yours doesn't, so you're going to compromise some quality if you use them in your project.

    I'm just not sure what to recommend as a fix. If your DV-AVIs have been converted to WMVs, the damage has already been done.

    Maybe someone else has some ideas.

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    Steve Grisetti
    Legend
    December 31, 2017

    By PE 18, I assume you mean Premiere Elements 2018. There is no version 18 of the program.

    What are you project settings (as listed under Project Settings under the Edit menu)?

    When you first added a clip of your video to your timeline, did you see a yellow-orange 'render' line above the video along the top of the timeline? This line indicates that you have not got your project settings set to match your video -- which will result in a poor quality output.

    Also what model of camcorder were you AVIs captured from and how? Was it miniDV footage captured over a FireWire connection?

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    steve88manAuthor
    Participant
    December 31, 2017

    Yes it is version 2018.

    Project settings: DV NTSC (widescreen) preset.

    Yes I see the yellow line just beneath the timelime on some of my clips. I used "reinterpret footage" to correct an aspect ratio difference (1.21 vs 1.18 due to overscan I think) and the yellow line went away but the problem continued.

    The footage showing the problem is originally captured by Windows utility from MiniDV camcorder via firewire, however it was converted at some point to .WMV file and the interlace was removed. So maybe that is the issue. But shouldn't PE re=interlace the video if asked to generate DV from a progressive source?

    I have noticed that VBR 1-pass output or CBR output does not show the problem, only VBR 2-pass. Also if I change the output field order setting to "progressive", then I don't see the issue. So I guess I have some workarounds but it would be nice to understand the problem better. I'll have to watch some longer samples of the output to make sure these workarounds completely eliminate the problem.

    Thanks for your help.

    S
    Steve Grisetti
    Legend
    January 1, 2018

    Since you're no longer working with the original DV-AVIs, I'm not sure what modifications have been made to your video files that will affect how they edit and what quality of video they will produce in Premiere Elements. The fact that you're seeing a render line above the clips means that Premiere Elements isn't sure how to digest the files.

    I'm not sure what to recommend.

    You can try opening one of your video files in the free download MediaInfo. In MediaInfo set the View menu to Text and copy and paste the report that it generates to this forum.

    It's possible that, once we see what your video files are made of, we can recommend a course of action. But, without that information, we're just shooting in the dark.

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