Find the first version where the picture becomes soft: the original, the portrait crop, the downloaded MP4 or the social upload. A narrow crop enlarges part of the source, and compression cannot recover missing detail. CastCuts exports at 720 × 1280; use that real output limit when deciding whether the recording can meet your quality requirements.
Judge detail in the source before judging the export
Pause the original on a well-lit face, a moving hand and any small writing. Check whether focus, motion blur, webcam compression or weak lighting already hides detail. Compare the same moment rather than a still thumbnail with a different frame. If the original is soft, return to the recording project or a better camera file when available. An export setting cannot recreate a face or label the recording never resolved.
Measure the cost of a narrow crop
A landscape frame may look sharp at its full size while a small region becomes soft when enlarged to fill portrait video. Compare a fixed crop with full-frame layout. The full frame preserves more context but makes people and writing smaller inside the canvas. Select a close-up already present in the source when possible. Choose the composition that communicates the answer rather than treating a filled canvas as the only acceptable result.
Avoid unnecessary compression between the master and clip
Use the best practical source you own instead of repeatedly downloading and recompressing previous social posts. Most delivery codecs use lossy compression, so another encode can discard detail. Keep the original and create only the working copy required for compatibility or upload limits. If you must reduce a large recording, compare short samples with movement and faces before encoding the full episode; a static opening slide is an incomplete quality test.
Compare the saved file with the destination preview
Download the completed CastCuts MP4 and inspect it locally before uploading it elsewhere. Check it at a sensible phone viewing size and separate source softness from oversized desktop playback. Then review the destination’s processed video through its own publishing workflow. If your deliverable specifically requires 1080p or a higher-resolution master, choose a workflow that supplies it. CastCuts Pro removes branding from new renders; it does not increase the 720 × 1280 export resolution.
A fictional wide shot with a small guest
Illustrative example. The people, recordings and results described here are fictional.
A creator crops a wide two-person interview tightly around a guest sitting at the edge. The original room view looks acceptable, but the enlarged guest is soft. The creator compares full-frame output and a later camera close-up. They select the close-up passage because its visible detail supports the point, rather than converting the same wide frame to a larger nominal resolution and expecting sharper facial features.
Choose better source detail or a gentler composition before changing file labels.
Check before you finish
- The same moving and still moments are compared across source and export.
- The portrait crop is checked for excessive enlargement of a small subject.
- Repeated social downloads and unnecessary conversions are avoided.
- The required deliverable fits the actual 720 × 1280 output limit.
Practical questions
Will uploading a 4K recording produce a 4K clip?
No. A detailed source can give a crop more useful information, but the current CastCuts output remains 720 × 1280 on both plans.
Can larger captions make the source sharper?
They can make text easier to read, but they do not repair a blurred face or unreadable chart. Treat caption readability and source image quality separately.
Why does the wide original look better than the close crop?
The crop enlarges a smaller part of the recorded image. Compare a less aggressive composition or a source close-up instead of assuming that the file extension controls sharpness.
Use this workflow in CastCuts
Compare framing before exporting a portrait clip
CastCuts selects continuous 1–90 second excerpts and exports 9:16, 720 × 1280 H.264/AAC MP4 files. Automatic transcription and transcript-based suggestions support English and require review. Free exports include CastCuts branding; Pro removes it from new renders for $9 USD/month, with the same processing and storage limits. Episode media is retained for 24 hours. Keep your originals and download finished clips before expiry. Publishing is manual.