Answers.Body: <p>As <a href="https://forums.creativecow.net/docs/forums/post.php?forumid=3&amp;postid=942511&amp;univpostid=942511&amp;pview=t" rel="nofollow noreferrer">this answer</a> alludes to, it's probably an issue with the target bitrate:</p>
  
  <blockquote>
    <p>800kbps is very low for 1080p. It probably works for lecture notes
    because there isn't much change from frame to frame, but blocking
    occurs during the transition because there isn't enough bandwidth to
    handle all the changes. Here are a few alternatives:</p>
    
    <ul>
    <li>Keep average bitrate low but increase the maximum bitrate; this will potentially provide headroom for the transitions</li>
    <li>Use a wipe or slide transition instead of fade so that only part of the image changes at a given time</li>
    <li>Do not use a transition; just cut to black (or white, or a new title); this alternative will likely produce the best results</li>
    </ul>
    
    <p>A few notes about your other settings:</p>
    
    <ul>
    <li>Render at Maximum Bit Depth matters if processing and exporting at 10+ bits per channel; you can leave it unchecked for H.264</li>
    <li>Maximum Render Quality is intended for use when exporting at smaller dimensions than the sequence</li>
    <li>Changing Stream Compatibility to Standard and Profile to Main or High will provide better compression via CABAC encoding; however, the
    compressed file might not play on some devices (Main Profile will be
    more compatible than High)</li>
    <li>Consider publishing low-bitrate versions at lower resolution (1280x720 or even 854x480) and encode 1080p at higher bitrate;
    similarly, retangular pixels (1440x1080) can help, but the video won't
    play correctly in many media players</li>
    </ul>
  </blockquote>
  
  <p>Turns out when I chose <strong>H.264</strong> as the format and <strong>Match Source - High Bitrate</strong> as the preset, the default target bitrate was very low (10 Mbps). For a 4K video, you <a href="https://support.google.com/youtube/answer/1722171?hl=en" rel="nofollow noreferrer">probably want to use</a> <strong>VBR, 2 pass</strong> with Target Bitrate set to <strong>44 Mbps</strong>, and Maximum Bitrate set to <strong>56 Mbps</strong>.</p>
  
  <p>This also explains why my resulting videos in Premiere were originally much smaller than similar ones created in Final Cut Pro.</p>
  
  <p>If you're uploading to YouTube, you can use the <strong>YouTube 2160p 4K Ultra HD</strong> present, which will choose a respectable 40 Mbps. The one caveat is that there are two versions of "4K" and there's a possibility that your source clips will get cropped with these export settings. To verify, you should temporarily "match source" on the width/height of the video, and verify that those are the same as the YouTube preset you chose.</p>
  
  <p>Although even with this preset, you may want to follow some of the suggestions in <a href="https://blog.pond5.com/12628-social-media-export-settings-in-adobe-premiere-pro-the-ultimate-guide/" rel="nofollow noreferrer">this article</a> and tweak it to use <strong>VBR, 2 pass</strong>. Although the low bitrate mentioned in the article should probably be avoided.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-03-04T20:02:09.253Z
Answers.LastActivityDate: 2019-04-15T00:44:38.273Z
Answers.LastEditDate: 2019-04-15T00:44:38.273Z
Answers.UserDisplayName: Senseful
Body: <p>I'm adding a Cross Dissolve transition to a video. In preview mode it looks great. When I export to H.264, it shows blocky artifacts, even if I have the "Use Maximum Rendering Quality" checkbox checked.</p>
  
  <p>Is there any way to get high quality cross dissolves in Premiere?</p>
  
  <p>Update: I'm creating a 4K video (source was filmed in 4K at 30fps), and using all of the other default settings for Video output.</p>
  
Tags: <premiere><transitions>
Title: Cross dissolve introduces blocky artifacts
UserDisplayName: Senseful
ThreadText: # Cross dissolve introduces blocky artifacts
  
  (Asked by: username_0 on 2019-03-04)
  
  I'm adding a Cross Dissolve transition to a video. In preview mode it looks great. When I export to H.264, it shows blocky artifacts, even if I have the "Use Maximum Rendering Quality" checkbox checked.
  
  Is there any way to get high quality cross dissolves in Premiere?
  
  Update: I'm creating a 4K video (source was filmed in 4K at 30fps), and using all of the other default settings for Video output.
  
  **Tags:** premiere, transitions
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2019-03-04. Score: 1 | Accepted answer
  
  As [this answer](https://forums.creativecow.net/docs/forums/post.php?forumid=3&postid=942511&univpostid=942511&pview=t) alludes to, it's probably an issue with the target bitrate:
  
  > 800kbps is very low for 1080p. It probably works for lecture notes
  > because there isn't much change from frame to frame, but blocking
  > occurs during the transition because there isn't enough bandwidth to
  > handle all the changes. Here are a few alternatives:
  >
  > * Keep average bitrate low but increase the maximum bitrate; this will potentially provide headroom for the transitions
  > * Use a wipe or slide transition instead of fade so that only part of the image changes at a given time
  > * Do not use a transition; just cut to black (or white, or a new title); this alternative will likely produce the best results
  >
  > A few notes about your other settings:
  >
  > * Render at Maximum Bit Depth matters if processing and exporting at 10+ bits per channel; you can leave it unchecked for H.264
  > * Maximum Render Quality is intended for use when exporting at smaller dimensions than the sequence
  > * Changing Stream Compatibility to Standard and Profile to Main or High will provide better compression via CABAC encoding; however, the
  >   compressed file might not play on some devices (Main Profile will be
  >   more compatible than High)
  > * Consider publishing low-bitrate versions at lower resolution (1280x720 or even 854x480) and encode 1080p at higher bitrate;
  >   similarly, retangular pixels (1440x1080) can help, but the video won't
  >   play correctly in many media players
  
  Turns out when I chose **H.264** as the format and **Match Source - High Bitrate** as the preset, the default target bitrate was very low (10 Mbps). For a 4K video, you [probably want to use](https://support.google.com/youtube/answer/1722171?hl=en) **VBR, 2 pass** with Target Bitrate set to **44 Mbps**, and Maximum Bitrate set to **56 Mbps**.
  
  This also explains why my resulting videos in Premiere were originally much smaller than similar ones created in Final Cut Pro.
  
  If you're uploading to YouTube, you can use the **YouTube 2160p 4K Ultra HD** present, which will choose a respectable 40 Mbps. The one caveat is that there are two versions of "4K" and there's a possibility that your source clips will get cropped with these export settings. To verify, you should temporarily "match source" on the width/height of the video, and verify that those are the same as the YouTube preset you chose.
  
  Although even with this preset, you may want to follow some of the suggestions in [this article](https://blog.pond5.com/12628-social-media-export-settings-in-adobe-premiere-pro-the-ultimate-guide/) and tweak it to use **VBR, 2 pass**. Although the low bitrate mentioned in the article should probably be avoided.
  
  
  ---
  
  