2. The Crop Proportions menu has several options to restrict the settings to a particular aspect
ratio. Choose 4:3 from the Crop Proportions menu. Now, if you make changes to the crop
settings they will be locked to a 4:3 aspect ratio.
3. Click the Output tab to bring it to the front.The Output tab shows a preview of the video to be encoded. The Source Scaling menu let
you choose the way a mismatch between the source aspect ratio and the output settings.
4. Try each of the options in the Source Scaling menu to see the results. The option Change
Output Size To Match Source is not available for all export formats. It achieves the same
result as clicking the Match Source button on the Video tab in the Export settings.
5. Leave the Source Scaling menu set to Scale To Fit. Switch to the Source tab and click the
Crop The Output Video button to disable cropping. Switch back to the Output tab to make
sure the image fills the screen.After making changes on the Source tab or choosing a new output frame size, it’s always a good
idea to check the Output tab to spot errors such as unwanted letterboxing or distortion caused by
the irregularly shaped pixels used in some video formats.
Working with Adobe Media Encoder CC
Adobe Media Encoder CC is a stand-alone application that can be run independently of or be
launched from Premiere Pro. One advantage of using Media Encoder is that you can send an
encoding job directly from Premiere Pro and then continue working on your edit as the
encoding is processed. If your client asks to see your work before you finish editing, Media
Encoder can produce the file in the background without interrupting your flow.
By default, Media Encoder pauses encoding when you play video in Premiere Pro to maximize
playback performance. You can change this in the Premiere Pro Playback preferences.