Frequently Asked Questions

Use MP4 (H.264). It plays everywhere (browsers, TVs, presentations). Enable Max compatibility (yuv420p) if the video must work on older displays or office software. For smaller files at the same quality, try H.265 (slower to encode), or WEBM (VP9) for web‑friendly delivery.

Balanced (CRF) is the recommended default: quality is constant, file size adapts to scene complexity. Pick a Quality Level: Very High ≈ CRF 18–20, High ≈ 20–22, Medium ≈ 23–25, Low ≈ 28+. Target Size (Bitrate) is for strict size/bandwidth limits (e.g., kiosks, LMS uploads).

• AVI (MPEG‑4) doesn’t support CRF — the app automatically switches to Bitrate.

Keep Original when you need maximum detail. Downscale to 1080p for YouTube or desktop viewing and 720p for lightweight sharing. For vertical platforms choose 1080×1920 (9:16).

• Downscaling from 4K to 1080p reduces size drastically with minimal perceived loss on most screens.

Stick to the original unless you have a reason to change. Choose 30 fps for most content and 60 fps for gameplay/sports. Converting 60→30 can halve the bitrate requirement while staying smooth for non‑action footage.

Use MP4 (H.264), Resolution 1080p (or Original), Quality Balanced (High), Framerate Original. Leave Audio to Original bitrate/sample‑rate or choose 160–192 kbps stereo. Apply the built‑in YouTube 1080p profile for a one‑click setup.

Set 1080×1920 vertical, Framerate 30 fps (or Original if already 30), Quality Balanced (High). Keep audio on Original. Apply the TikTok 1080×1920 profile.

Choose 720p, Balanced (Medium) or bitrate around 2–3 Mbps for H.264, Framerate 30 fps. Enable Max compatibility for broad device support. Use the WhatsApp 720p profile.

Keep Resolution Original and set Quality to Balanced (High). If the source is 4K but viewed on laptops/phones, downscale to 1080p. Avoid very low bitrates on high‑motion scenes.

Pick MP4 (H.264) and enable Max compatibility (yuv420p). Keep framerate 30 or Original. Avoid exotic resolutions and odd aspect ratios.

In Video → Subtitles (burn‑in) select an .srt file. Subtitles will be baked into the picture so they always show. For multilingual delivery, export separate versions with different .srt files.

Use a transparent PNG, set opacity 30–50%, keep margins safe from cropping, and place it consistently (e.g., bottom‑right). For content with both dark and bright scenes, prepare light/dark watermark variants.

Raise Volume a few dB (avoid +20 unless necessary). Use EQ: add 2–4 dB at 1 kHz for speech clarity; reduce 2–4 dB at 10 kHz to tame hiss; add 1–3 dB at 100 Hz for body. Leave bitrate/sample‑rate at Original unless you must standardize.

Select MP3 or WAV as Output Format. Keep Sample rate on Original. MP3 is smaller; WAV is lossless and best for editing or archiving.

Usually invalid Trim values (end ≤ start) or no frames pass a filter chain. Clear Trim and try again. Also verify the input actually contains video and the chosen format supports it.

Keep Framerate on Original. Use whole‑second in/out values first; if needed, adjust to the nearest frame timecode later.

Each queued item stores its output path and format settings at the time you add it. You can mix formats in the same queue; the progress bar reflects each item’s own duration and timecodes.

This app focuses on reliable CPU encoding via FFmpeg for consistent quality across machines. If you need GPU acceleration, consider running a custom FFmpeg command externally and adding results to the queue.