2019.x

Ensuring the Quality Level of Precomputed Clips
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3. Set the Effects Processing bit depth option to one of the following:
Ensuring the Quality Level of Precomputed Clips
Before you export or output your sequence, you must ensure that all your precomputed clips have
been rendered using the desired quality settings. Media Composer cannot always recognize that it
needs to re-render effects when you change a quality setting. You must manually purge and re-render
precomputed clips to ensure that all effects render with the desired quality.
In general, you need to purge and re-render if you have rendered effects while working in a lower
quality setting and have then switched to a higher quality setting.
In contrast, if you render in a higher quality and switch to a lower quality, you do not always need to
re-render. The quality of the precomputed clips is higher than that of the sequence and they are
downconverted in real-time during playback. In this case, you should re-render only if you want to
improve playback performance or maintain a consistent rendering quality across all clips.
You need to consider re-rendering your precomputes if you change any of the settings listed in the
following table.
Option Description
8-bit Use this option when rendering time is more important than image
quality, or if you are mainly working with effects that do not support
16-bit precision.
16-bit Use this option if you want the best overall image quality. Use this
option if you use 10-bit resolutions, use many levels of nested
effects, or want the best color fidelity for rendered effects.
Automatic Use this option if you want the media source to determine the effects
resolution. Effects render at 16-bit for 10-bit media and at 8-bit for
8-bit media. This is the default.