๐จ Problem Identified
Issue: Your MP4 files exist but use codecs that web browsers can't play.
Error: "DEMUXER_ERROR_NO_SUPPORTED_STREAMS: FFmpegDemuxer: no supported streams"
Root Cause: Videos were encoded with codecs not supported by HTML5 video players.
๐ง Solution: Re-encode Your Videos
๐ Required Settings for Web Compatibility:
- Video Codec: H.264 (AVC)
- Audio Codec: AAC
- Container: MP4
- Profile: Baseline or Main (NOT High Profile)
- Max Resolution: 1920x1080 (1080p)
- Max Bitrate: 5000 kbps for video, 128 kbps for audio
๐ Free Tools to Fix Your Videos:
Option 1: HandBrake (Recommended - Easy GUI)
- Download HandBrake from https://handbrake.fr/
- Install and open HandBrake
- Drag your MP4 file into HandBrake
- Select the "Web Optimized" preset
- Click "Start" to convert
- Replace your original file with the new one
Option 2: FFmpeg (Command Line - More Control)
If you have FFmpeg installed, use this command:
ffmpeg -i input.mp4 -c:v libx264 -profile:v baseline -level 3.0 -pix_fmt yuv420p -c:a aac -b:a 128k -movflags +faststart output.mp4
Option 3: Online Converter (No Installation)
- Go to CloudConvert.com
- Upload your MP4 file
- Convert to MP4 with these settings:
- Video Codec: H.264
- Audio Codec: AAC
- Profile: Baseline
- Download the converted file