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| author | Jonas Smedegaard <dr@jones.dk> | 2017-05-18 11:06:33 +0200 |
|---|---|---|
| committer | Jonas Smedegaard <dr@jones.dk> | 2017-05-18 11:06:33 +0200 |
| commit | 56b7655e67528880778696d32f2d3a3e3ff30782 (patch) | |
| tree | 97dcafe8019733a36e89a3015bb0b09c98d1da10 /bin/loop+encode+stream | |
| parent | bff6b3ca2fc4f13592a52e3979161c8faa5b7bc0 (diff) | |
Generalize function videosize.
Diffstat (limited to 'bin/loop+encode+stream')
| -rwxr-xr-x | bin/loop+encode+stream | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/bin/loop+encode+stream b/bin/loop+encode+stream index 6e6abb3..eaf8897 100755 --- a/bin/loop+encode+stream +++ b/bin/loop+encode+stream @@ -7,6 +7,11 @@ set -e INPUT=../tmp/omni/show0/earth.yuv ## +## defaults +## +RATIO=4:3 + +## ## generic functions ## # shellcheck disable=SC2048,SC2059 @@ -30,8 +35,15 @@ ABITRATE_OPUS=48000 # TODO HEIGHT=384 -RATIO_NUM=4 -RATIO_DEN=3 +videosize() { height=$1; width_or_ratio=$2; + case $width_or_ratio in + *:*) num=${width_or_ratio%:*}; den=${width_or_ratio#*:}; width=$((height*num/den));; + *) width=$width_or_ratio;; + esac + echo_n $((height*width)) +} + +BITS=$(videosize "$HEIGHT" "$RATIO") # * bitrates and bits in parens based on https://developer.apple.com/library/content/documentation/General/Reference/HLSAuthoringSpec/Requirements.html # + bits rounded up to include nearby modulo 16 formats @@ -39,10 +51,6 @@ RATIO_DEN=3 # + best (i.e. high-modulo) 4:3 heights: 288 312 384 480 624 816 # * speeds tuned to just below 100% cpu usage for each combination on a multi-core computer # TODO: Externalize speeds to site-specific configfile -RATIO_NUM=${RATION_NUM:-16} -RATIO_DEN=${RATION_DEN:-9} -WIDTH=${WIDTH:-$((HEIGHT*RATIO_NUM/RATIO_DEN))} -BITS=$((WIDTH*HEIGHT)) if [ $BITS -le 110592 ]; then # 234p → 97344 VBITRATE=145000 SPEED_VP8=2 |