From c19b33c6eda0232d045df9f323524ec8d812c260 Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Tue, 16 May 2017 14:20:01 +0200
Subject: Scale anamorphic to square-pixel as needed.

---
 bin/decode+edit                    | 3 ++-
 bin/decode+edit+encode             | 3 ++-
 bin/decode+edit+encodeDV           | 3 ++-
 bin/decode+edit+loop+encode+stream | 3 ++-
 bin/stream                         | 3 ++-
 5 files changed, 10 insertions(+), 5 deletions(-)

(limited to 'bin')

diff --git a/bin/decode+edit b/bin/decode+edit
index 9f34d01..16c3155 100755
--- a/bin/decode+edit
+++ b/bin/decode+edit
@@ -13,11 +13,12 @@ HEIGHT=360
 mkdir -p $(dirname "$OUTPUT")
 
 # + loop-in-filter trick based on http://video.stackexchange.com/a/16933
+# + scale to square pixels as needed
 ffmpeg -hide_banner -threads auto -y \
  -i "$INPUT" \
  -i "$LOGO"
  -filter_complex \
- "[0:v]scale=-2:$HEIGHT[bg];
+ "[0:v]scale=iw*sar*$HEIGHT/ih:$HEIGHT,setsar=1[bg];
   [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20[v]" \
  -map '[v]' \
  -f yuv4mpegpipe "$OUTPUT"
diff --git a/bin/decode+edit+encode b/bin/decode+edit+encode
index 1983b54..a0eb208 100755
--- a/bin/decode+edit+encode
+++ b/bin/decode+edit+encode
@@ -25,12 +25,13 @@ mkdir -p $(dirname "$OUTPUT")
 
 # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
 # + scale+watermark trick based on http://stackoverflow.com/a/10937357
+# + scale to square pixels as needed
 # + Add 1s latency (deadline)
 ffmpeg -hide_banner -threads auto -y -re \
  -i "$INPUT" \
  -i "$LOGO" \
  -filter_complex \
- "[0:v]scale=-2:$HEIGHT[bg];
+ "[0:v]scale=iw*sar*$HEIGHT/ih:$HEIGHT,setsar=1[bg];
   [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20[v]" \
  -map '[v]' \
  -pix_fmt yuv420p \
diff --git a/bin/decode+edit+encodeDV b/bin/decode+edit+encodeDV
index c33635a..ef1474d 100755
--- a/bin/decode+edit+encodeDV
+++ b/bin/decode+edit+encodeDV
@@ -23,12 +23,13 @@ mkdir -p $(dirname "$OUTPUT")
 
 # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
 # + scale+watermark trick based on http://stackoverflow.com/a/10937357
+# + scale to square pixels as needed
 # + Add 1s latency (deadline)
 ffmpeg -hide_banner -threads auto -y \
  -i "$INPUT" \
  -i "$LOGO" \
  -filter_complex \
- "[0:v]scale=-2:$HEIGHT[bg];
+ "[0:v]scale=iw*sar*$HEIGHT/ih:$HEIGHT,setsar=1[bg];
   [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20[v]" \
  -map '[v]' \
  -target pal-dv "$OUTPUT"
diff --git a/bin/decode+edit+loop+encode+stream b/bin/decode+edit+loop+encode+stream
index 5dbe82d..ba70b02 100755
--- a/bin/decode+edit+loop+encode+stream
+++ b/bin/decode+edit+loop+encode+stream
@@ -35,13 +35,14 @@ fi
 # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
 # + loop-in-filter trick based on http://video.stackexchange.com/a/16933
 # + scale+watermark trick based on http://stackoverflow.com/a/10937357
+# + scale to square pixels as needed
 # + Add 1s latency (deadline)
 # + Use same RTP payload types as GStreamer
 ffmpeg -hide_banner -threads auto -re \
  -f lavfi -i "movie=filename=$INPUT:loop=$ITERATIONS, setpts=N/(FRAME_RATE*TB)" \
  -i "$LOGO" \
  -filter_complex \
- "[0:v]scale=-2:$HEIGHT[bg];
+ "[0:v]scale=iw*sar*$HEIGHT/ih:$HEIGHT,setsar=1[bg];
   [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20[v]" \
  -map '[v]' \
  -pix_fmt yuv420p \
diff --git a/bin/stream b/bin/stream
index d044b24..e4358b3 100755
--- a/bin/stream
+++ b/bin/stream
@@ -135,7 +135,7 @@ filter_split_height() {
 }
 filter_scale() { outstem=${1:-v};
  for height in $HEIGHTS; do
-  echo_n "[s$height]scale=-2:$height[$outstem$height]"
+  echo_n "[s$height]scale=iw*sar*$height/ih:$height,setsar=1[$outstem$height]"
  done
 }
 filter_watermark() {
@@ -153,6 +153,7 @@ tee_rtp() { stream=$1; pt=$2; port=$3;
 }
 
 # * scale+watermark trick based on http://stackoverflow.com/a/10937357
+#   + scale to square pixels as needed
 # * routing based on http://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs#Teepseudo-muxer
 # * VP8 encoding based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
 #   + Add 1s latency (deadline)
-- 
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