Tag: #mp4
14 articles
AVI to MP4 with FFmpeg — DivX/Xvid/MJPEG to H.264/AAC
Convert old AVI files (DivX, Xvid, MJPEG, MP3 audio) to MP4 with FFmpeg. Re-encode to H.264/AAC with CRF, learn when stream-copy works versus when you must re-encode, add faststart for web playback, plus troubleshooting and FAQ.
FFmpeg faststart — Fix Video That Won't Start Until Fully Downloaded
Your MP4 is slow to start playing on the web. The cause is the moov atom sitting at the end of the file, which delays playback. Fix it with FFmpeg's -movflags +faststart, which moves the index to the front for progressive download and streaming.
MOV to MP4 with FFmpeg — Lossless Copy and Re-encode
Convert QuickTime MOV files to MP4 with FFmpeg. Lossless remux with -c copy when codecs are MP4-compatible (H.264/AAC), and a re-encode path for ProRes or PCM audio. Container vs codec explained, plus faststart, audio fixes, and troubleshooting.
MP4 to MP3 with FFmpeg — Extract Audio to MP3 the Right Way
Extract and convert MP4 audio to MP3 with FFmpeg. Use libmp3lame with VBR (-q:a) or CBR (-b:a), strip the video with -vn, pick the right bitrate, trim sections, and fix common errors. Full troubleshooting and FAQ included.
WebM to MP4 with FFmpeg — VP8/VP9 + Opus to H.264/AAC
Convert WebM (VP8/VP9 video, Opus/Vorbis audio) to MP4 with FFmpeg. Re-encode to H.264/AAC with CRF, when VP9 stream-copy is possible, faststart for web playback, quality/size trade-offs, and a full troubleshooting and FAQ section.
iPhone Video Won't Play on Windows? Fix HEVC, Black Screen, and Sideways Videos
iPhone videos often fail to play on Windows PCs — codec errors, audio-only playback, or portrait videos rotated sideways. Learn the three common causes (HEVC, hvc1/hev1 tagging, rotation metadata) and fix them in your browser or with one FFmpeg command.
Fixing the moov atom not found Error — Repairing Broken MP4 Files
Understand and fix the 'moov atom not found' error in FFmpeg. A clear guide to MP4 file structure, faststart optimization, qt-faststart, and recovering truncated recordings.
iPhone MOV to MP4 — The Complete Guide with the hvc1 Tag Fix
Make iPhone-captured HEVC .mov files play on Windows, Discord, Twitter, and the rest of the world. Lossless remux, hvc1 tag explained, H.264 re-encode for older players, batch conversion, and iPhone camera-format settings — covered with FFmpeg.
MKV to MP4 Remux — No Quality Loss with FFmpeg
Convert MKV to MP4 the fast, lossless way using FFmpeg remux. Remux vs. re-encode compared, the three typical failure modes (subtitle format, non-standard audio, AV1/VP9), movflags +faststart explained, and a practical audio-only re-encode recipe.
TS to MP4 with FFmpeg — Lossless Remux and CM Cuts
Convert TS/m2ts files from Japanese terrestrial TV recordings to MP4 with FFmpeg. Lossless remuxing with -c copy, PCR wraparound fixes, CM cutting, ARIB subtitle handling, BDAV extraction, and AACS errors explained. A practical guide for PT3/TVTest users.
MP4 vs WebM vs MOV vs MKV - Format Guide
A side-by-side comparison of MP4, WebM, MOV, and MKV — characteristics, use cases, and codec support. Includes FFmpeg conversion commands and recommended formats by scenario.
Add, Select, and Remove Multiple Audio Tracks — Managing Multilingual Audio with FFmpeg
How to create and edit video files with multiple audio tracks using FFmpeg. Learn to add, select, and remove audio tracks, set language metadata, mark a default track, and understand the differences between MKV and MP4.
Video Format Conversion Basics (MP4, MKV, WebM, MOV)
Convert video formats MP4, MKV, WebM, MOV with FFmpeg: container vs codec differences, when -c copy works vs fails, and ffprobe for codec inspection.
Complete Guide to Converting Video to MP4 (H.264/AAC) with FFmpeg
Convert any video to MP4 with FFmpeg: H.264 (libx264) + AAC, best CRF settings, -preset guide, stream copy shortcut. The complete ffmpeg video-to-mp4 command reference.