An ffmpeg command that produces abr video assets suitable for silent web background video. I'm using shaka-player to stream the resulting files.
I went through several iterations of this, and other variations could work as well. I believe this produces all the assets needed for cross-browser compatibility. Safari needs mp4, and iOS Safari (at least the version my old MacBook can simulate) will only play HLS, even with shaka-player.
| #!/bin/bash | |
| # uses ffmpeg version 4.4.2 | |
| source=$1 | |
| outdir=$2 | |
| ffmpeg -re -i $source -an -dash 1 -tile-columns 4 -frame-parallel 1 \ | |
| -map 0 -c:v:0 libvpx-vp9 -filter:v:0 scale=-2:360 -b:v:0 500k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:1 libvpx-vp9 -filter:v:1 scale=-2:360 -b:v:1 800k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:2 libvpx-vp9 -filter:v:2 scale=-2:360 -b:v:2 1400k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:3 libvpx-vp9 -filter:v:3 scale=-2:480 -b:v:3 750k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:4 libvpx-vp9 -filter:v:4 scale=-2:480 -b:v:4 1200k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:5 libvpx-vp9 -filter:v:5 scale=-2:480 -b:v:5 2100k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:6 libvpx-vp9 -filter:v:6 scale=-2:720 -b:v:6 1500k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:7 libvpx-vp9 -filter:v:7 scale=-2:720 -b:v:7 2400k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:8 libvpx-vp9 -filter:v:8 scale=-2:720 -b:v:8 4200k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:9 libvpx-vp9 -filter:v:9 scale=-2:1080 -b:v:9 3000k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:10 libvpx-vp9 -filter:v:10 scale=-2:1080 -b:v:10 4800k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:11 libvpx-vp9 -filter:v:11 scale=-2:1080 -b:v:11 8400k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:12 libx264 -filter:v:12 scale=-2:360 -b:v:12 500k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:13 libx264 -filter:v:13 scale=-2:360 -b:v:13 800k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:14 libx264 -filter:v:14 scale=-2:360 -b:v:14 1400k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:15 libx264 -filter:v:15 scale=-2:480 -b:v:15 750k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:16 libx264 -filter:v:16 scale=-2:480 -b:v:16 1200k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:17 libx264 -filter:v:17 scale=-2:480 -b:v:17 2100k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:18 libx264 -filter:v:18 scale=-2:720 -b:v:18 1500k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:19 libx264 -filter:v:19 scale=-2:720 -b:v:19 2400k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:20 libx264 -filter:v:20 scale=-2:720 -b:v:20 4200k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:21 libx264 -filter:v:21 scale=-2:1080 -b:v:21 3000k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:22 libx264 -filter:v:22 scale=-2:1080 -b:v:22 4800k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -map 0 -c:v:23 libx264 -filter:v:23 scale=-2:1080 -b:v:23 8400k -keyint_min 60 -g 60 -sc_threshold 0 \ | |
| -f dash \ | |
| -single_file 1 \ | |
| -use_template 1 \ | |
| -use_timeline 1 \ | |
| -seg_duration 2 \ | |
| -adaptation_sets "\ | |
| id=0,streams=0,1,2,3,4,5,6,7,8,9,10,11 \ | |
| id=1,streams=12,13,14,15,16,17,18,19,20,21,22,23" \ | |
| -single_file_name '$RepresentationID$-$Bandwidth$.$ext$' \ | |
| -hls_playlist 1 \ | |
| "$outdir/manifest.mpd" |