# 1️⃣ Get a human‑readable summary
ffprobe -v error -show_format -show_streams JUQ-516.mp4
# 2️⃣ Trim the first 10 seconds off (re‑encode)
ffmpeg -ss 00:00:10 -i JUQ-516.mp4 -c:v libx264 -crf 23 -c:a aac trimmed.mp4
# 3️⃣ Convert to a web‑friendly MP4 (H.264 + AAC, 720p)
ffmpeg -i JUQ-516.mp4 -vf "scale=-2:720" -c:v libx264 -crf 23 -preset fast -c:a aac -b:a 128k JUQ-516_720p.mp4
# 4️⃣ Extract the audio as MP3
ffmpeg -i JUQ-516.mp4 -vn -c:a libmp3lame -q:a 2 JUQ-516.mp3
# 5️⃣ Verify integrity (no errors = OK)
ffmpeg -v error -i JUQ-516.mp4 -f null -
AtomicParsley JUQ-516.mp4 -t
# or
MP4Box -info JUQ-516.mp4
These tools reveal track IDs, fragmentation, and moov atom placement (important for streaming vs. progressive download).
| Item | What it means |
|------|----------------|
| File name | JUQ-516.mp4 – a typical “title‑code” style name (often used by studios, archives, or automated naming scripts). |
| Extension | .mp4 – the standard MPEG‑4 Part 14 container, compatible with virtually every modern player and device. |
| Likely content | Video + audio (and optionally subtitles, metadata, or auxiliary streams). |
| Typical size | Depends on resolution, bitrate, length – anything from a few MB (mobile clip) to several GB (HD/4K movie). |
| Common sources | • Download from a media library or P2P network.
• Export from video‑editing software.
• Automatically generated surveillance or dash‑cam footage.
• Archive of a short‑film or promotional clip. | JUQ-516.mp4