From b14806a74b30762c46a943d943de4536dfd1e978 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Fri, 17 Feb 2023 16:51:21 -0800
Subject: [PATCH] wip trying with segment muxer

not having luck with the fmp4
just gonna stick with hls i think
---
 make-hls-new.sh     |  3 +++
 make-hls-segment.sh | 30 ++++++++++++++++++++++++++++++
 new.html            | 13 ++++++++++++-
 segment.m3u8        | 10 ++++++++++
 timestamp-id3.php   |  9 ++++++---
 5 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100755 make-hls-segment.sh
 create mode 100644 segment.m3u8

diff --git a/make-hls-new.sh b/make-hls-new.sh
index 511bd2c..12d6245 100755
--- a/make-hls-new.sh
+++ b/make-hls-new.sh
@@ -33,6 +33,9 @@ ffmpeg -i $INFILE -s 320x180 $VIDEO_JPEG $AUDIO_MP3 $MOVFLAGS -y new-mjpeg.mov
 ffmpeg -i $INFILE -vn $AUDIO_AAC $HLSFLAGS -hls_segment_filename new-aac.mp4 -y new-aac.m3u8
 ffmpeg -i $INFILE -vn $AUDIO_OPUS $HLSFLAGS -hls_segment_filename new-opus.mp4 -y new-opus.m3u8
 
+#ffmpeg -i $INFILE -vn $AUDIO_MP3 $HLSFLAGS -hls_segment_filename new-mp3.mp4 -y new-mp3-mp4.m3u8
+#ffmpeg -i $INFILE -vn $AUDIO_MP3 $TSFLAGS -hls_segment_filename new-mp3.ts -y new-mp3-ts.m3u8
+
 ffmpeg -i $INFILE -vn $AUDIO_MP3 -f segment -segment_time 10 -segment_list new-mp3.m3u8 -y new-mp3-%04d.mp3
 php timestamp-id3.php new-mp3.m3u8 new-mp3.mp3
 
diff --git a/make-hls-segment.sh b/make-hls-segment.sh
new file mode 100755
index 0000000..296294f
--- /dev/null
+++ b/make-hls-segment.sh
@@ -0,0 +1,30 @@
+MOVFLAGS="+frag_keyframe+empty_moov+default_base_moof+faststart"
+SEGFLAGS="-f ssegment -segment_time 10 -segment_format movflags=$MOVFLAGS"
+
+BITRATE="-b:v 1000k"
+
+VIDEO_VP9="-vcodec libvpx-vp9 -row-mt 1 -cpu-used 3 -g 240 $BITRATE -s 854x480"
+VIDEO_H264="-vcodec h264 -g 240 $BITRATE $SIZE_MAIN -s 640x360"
+VIDEO_JPEG="-vcodec mjpeg -g 240 $BITRATE $SIZE_JPEG -s 213x120"
+
+AUDIO_OPUS="-acodec libopus -ac 2 -ar 48000 -vb 96k"
+AUDIO_AAC="-ac 2 -ar 44100 -vb 128k"
+AUDIO_MP3="-acodec libmp3lame -ac 2 -ar 44100 -vb 128k"
+
+INFILE=caminandes-llamigos.webm
+
+set -e
+
+# Audio for HLS
+ffmpeg -i $INFILE -vn $AUDIO_AAC $SEGFLAGS -segment_list segment-aac.m3u8 -y segment-aac-%04d.mp4
+php timestamp-id3.php segment-aac.m3u8 segment-aac.mp4
+
+ffmpeg -i $INFILE -vn $AUDIO_OPUS $SEGFLAGS -segment_list segment-opus.m3u8 -y segment-opus-%04d.mp4
+php timestamp-id3.php segment-opus.m3u8 segment-opus.mp4
+
+ffmpeg -i $INFILE -vn $AUDIO_MP3 -segment_list segment-mp3.m3u8 -y segment-mp3-%04d.mp3
+php timestamp-id3.php segment-mp3.m3u8 segment-mp3.mp3
+
+# Video for HLS
+ffmpeg -i $INFILE -an $VIDEO_VP9 $SEGFLAGS -segment_list segment-vp9.m3u8 -y segment-vp9-%04d.mp4
+php timestamp-id3.php segment-vp9.m3u8 segment-vp9.mp4
diff --git a/new.html b/new.html
index 740ff90..a2a2d36 100644
--- a/new.html
+++ b/new.html
@@ -57,7 +57,17 @@
             <source type=application/vnd.apple.mpegurl src=new-opus.m3u8>
         </video>
 
-        <p>HLS MP3 alone (only audio)</p>
+        <p>HLS MP3 MP4 alone (only audio)</p>
+        <video controls width=640 height=360>
+            <source type=application/vnd.apple.mpegurl src=new-mp3-mp4.m3u8>
+        </video>
+
+        <p>HLS MP3 TS alone (only audio)</p>
+        <video controls width=640 height=360>
+            <source type=application/vnd.apple.mpegurl src=new-mp3-ts.m3u8>
+        </video>
+
+        <p>HLS MP3 raw alone (only audio)</p>
         <video controls width=640 height=360>
             <source type=application/vnd.apple.mpegurl src=new-mp3.m3u8>
         </video>
@@ -77,6 +87,7 @@
                     ['Opus-in-WebM', 'audio/webm; codecs="opus"'],
                     ['VP9-in-MP4', 'video/mp4; codecs="vp09.00.10.08"'],
                     ['Opus-in-MP4', 'audio/mp4; codecs="opus"'],
+                    ['MP3-in-MP4', 'audio/mp4; codecs="mp4a.6b"'],
                     ['MP3', 'audio/mp3'],
                 ];
                 let yes = [];
diff --git a/segment.m3u8 b/segment.m3u8
new file mode 100644
index 0000000..152618d
--- /dev/null
+++ b/segment.m3u8
@@ -0,0 +1,10 @@
+#EXTM3U
+
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="opus",NAME="English",LANGUAGE="en-US",AUTOSELECT=YES,DEFAULT=YES,CHANNELS="2",URI="segment-opus.m3u8"
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="mp3",NAME="English",LANGUAGE="en-US",AUTOSELECT=YES,DEFAULT=YES,CHANNELS="2",URI="segment-mp3.m3u8"
+
+#EXT-X-STREAM-INF:BANDWIDTH=2560000,RESOLUTION=1920x1080,FRAME-RATE=24.0,CODECS="vp09.00.10.08,opus",AUDIO="opus"
+segment-vp9.m3u8
+
+#EXT-X-STREAM-INF:BANDWIDTH=2560000,RESOLUTION=1920x1080,FRAME-RATE=24.0,CODECS="vp09.00.10.08,mp4a.40.34",AUDIO="mp3"
+segment-vp9.m3u8
diff --git a/timestamp-id3.php b/timestamp-id3.php
index 42fe5c6..eabf17e 100644
--- a/timestamp-id3.php
+++ b/timestamp-id3.php
@@ -59,7 +59,7 @@ function hexdump($str) {
 const KHZ_90 = 90000;
 const MHZ_27 = 27000000;
 
-function process_mp3( $filename, $pts ) {
+function process_mp3( $filename, $data, $pts ) {
     $owner = "com.apple.streaming.transportStreamTimestamp\x00";
     $timestamp = $pts * KHZ_90;
     $timestamp_high = 0;
@@ -99,7 +99,6 @@ function process_mp3( $filename, $pts ) {
     $hex = hexdump($tag);
     print "$filename $pts $hex\n";
 
-    $data = file_get_contents( $filename );
     return "$tag$data";
 }
 
@@ -111,6 +110,7 @@ $self = array_shift( $args );
 $playlist = array_shift( $args );
 $playlist_out = $playlist;
 $outfile = array_shift( $args );
+$process_mp3 = preg_match('/\.mp3$/i', $outfile);
 
 $lines = file( $playlist, FILE_IGNORE_NEW_LINES + FILE_SKIP_EMPTY_LINES );
 
@@ -153,7 +153,10 @@ foreach ( $lines as $line ) {
         continue;
     }
     $filename = $line;
-    $chunk = process_mp3( $filename, $pts );
+    $chunk = file_get_contents( $filename );
+    if ( $process_mp3 ) {
+        $chunk = process_mp3( $filename, $chunk, $pts );
+    }
     $len = strlen( $chunk );
     $lines_out[] = "#EXT-X-BYTERANGE:$len@$offset";
     $lines_out[] = "$outfile";