Tag: #stream copy
3 articles
FFmpeg: Audio Out of Sync After Converting — Causes and Fixes
Audio and video drifted out of sync only after converting with FFmpeg? Learn why stream copy carries over bad timestamps, why a VFR source breaks sync, and fix it by re-encoding, rebuilding timestamps with +genpts, normalizing with aresample, or forcing constant frame rate.
FFmpeg -c copy vs Re-encode — Stream Copy or Re-compress?
Understand the most important choice in FFmpeg: -c copy (stream copy — lossless, instant) versus re-encoding (lossy, slow, flexible). Learn when each is appropriate, the container compatibility caveat, and runnable commands for both paths.
How to Trim and Cut Video with FFmpeg — Complete -ss/-to/-t Guide
Trim video precisely with FFmpeg. Learn -ss/-to/-t options, input-side vs output-side -ss trade-offs, stream-copy fast cutting, frame-accurate re-encoding, batch trim scripts, and how to fix the keyframe artifact problem.