Convert .ts chunk to .fmp4 (HLS) chunk (NOT FINISHED YET)

ts2fmp4.sh

#!/usr/bin/env bash

# Assumimng input .ts with 2 tracks:
# Video: h264
# Audio: AAC

# Check ffmpeg and BENTO mp4extract are installed and in the PATH

if ! [ -x "$(command -v ffmpeg)" ]; then
  echo 'Error: ffmpeg is not installed.' >&2
  exit 1
fi
if ! [ -x "$(command -v mp4extract)" ]; then
  echo 'Error: mp4extract (BENTO) is not installed.' >&2
  exit 1
fi

# Read arguments
if [ "$#" -ne 2 ]; then
    echo "The usage is:"
    echo "./tsmp4.sh INPUT_TS_DIR OUTPUT_FMP4_DIR"
    echo "Example: ./ts2fmp4.sh ./input_ts ./output_fmp4"
    exit 1
fi
input_ts_dir=$1 #ts-src
output_fmp4_dir=$2 #mp4-converted

# Ini var
is_first_segment='yes'

# Read & transform all .ts from the input dir
for i in $input_ts_dir/*.ts; do 
	name=`echo "${i%.*}"`;
	srcname="$name.ts"
	filename=$(basename $name)
	dstname_fmp4="$output_fmp4_dir/$filename.mp4"
	fragname_fmp4="$output_fmp4_dir/$filename.m4s"
	dstname_init="$output_fmp4_dir/init.mp4"
	tmpname_init="$output_fmp4_dir/tmp.bin"
	
	echo "Source file: $srcname";
	echo "Destination fmp4 file: $dstname_fmp4";

	# Notice that we copy video but we REtranscode the audio 
	#TODO Fix annexB problem!
	ffmpeg -y -i $srcname -vcodec copy -f mp4 -movflags +empty_moov+omit_tfhd_offset+global_sidx+default_base_moof -frag_size 1000000000 $dstname_fmp4
	
	# 1- Create init.mp4: Getting 1st segment and extracting (ftyp and moov)
	if [ "$is_first_segment" = "yes" ]; then

		echo "Generating $dstname_init";

		#NOTE: mp4edit does NOT work outside moov atom (BENTO bug)

		rm -y $dstname_init
		mp4extract ftyp $dstname_fmp4 $dstname_init
		mp4extract moov $dstname_fmp4 $tmpname_init
		cat $tmpname_init >> $dstname_init

		rm $tmpname_init

		is_first_segment='no'
	fi

	# 2- Clean up all segments: Remove ftyp, moov, and mfra (keep just sidx, moof, and mdat)

	echo "Cleaning segment $fragname_fmp4";

	# Assuming 2 tracks
	mp4extract sidx[0] $dstname_fmp4 $fragname_fmp4 
	
	mp4extract sidx[1] $dstname_fmp4 $tmpname_init 
	cat $tmpname_init >> $fragname_fmp4
	rm $tmpname_init

	mp4extract moof $dstname_fmp4 $tmpname_init 
	cat $tmpname_init >> $fragname_fmp4
	rm $tmpname_init

	mp4extract mdat $dstname_fmp4 $tmpname_init 
	cat $tmpname_init >> $fragname_fmp4
	rm $tmpname_init

	# PROBLEM: 1st segment plays ok 2nd segment breaks (continuity indicators), WORKS WITH A DISCO IN THE MIDLE!!!!!!!!!

	# Manual steps to fix disco between segments
	# We should rewrite:
	#  tfdt->baseMediaDecodeTime with the PTS for the 1st frame in that chunk
	#  And perhaps sidx->baseMediaDecodeTime (not sure about this one) (it works without sidx too!!!!)
	#  And perhaps mfhd->sequenceNumber (not sure about this one)

	# Tested ffprobe get last video/autio PTS1 and dur1 from chunk1, and added manually (hex editor) to segment2 tfdt->baseMediaDecodeTime = PTS1+dur1, and fixed mfhd->sequenceNumber
	# RESULT: Plays good safari and QT BUT audio GLITCH!!!!!! (PASSES mediastreamvalidator tests!!!!)
done

exit 0