Dan Dennedy ddennedy
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| #!/bin/sh | |
| startswith() { case $1 in $2*) true;; *) false;; esac; } | |
| tmpfile=$(mktemp) | |
| ffprobe -show_frames "$1" 2> /dev/null > "$tmpfile" | |
| GOP=1 | |
| maxGOP=1 | |
| Bframes=0 |
ddennedy
/ dash-avc264 command lines
Last active
July 27, 2022 03:44
Use ffmpeg and mp4box to prepare DASH-AVC/264 v1.0 VoD
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| See my DASH-IF presentation from October, 2014: | |
| https://s3.amazonaws.com/misc.meltymedia/dash-if-reveal/index.html#/ | |
| 1. encode multiple bitrates with keyframe alignment: | |
| ffmpeg -i ~/Movies/5D2_Portrait.MOV -s 1280x720 -c:v libx264 -b:v 1450k -bf 2 \ | |
| -g 90 -sc_threshold 0 -c:a aac -strict experimental -b:a 96k -ar 32000 out.mp4 | |
| My input was 30 fps = 3000 ms. If it were 29.97, then a GOP size of 90 frames will yield a base segment | |
| size of 3003 milliseconds. You can make the segment size some multiple of this, e.g.: 6006, 9009, 12012. |