I tried using ISMdownloader 2.0 and after it downloaded the fragment videos and audio, it stuck when mux is going to start, it do not move at all. I tried a few times but same problem. Right now i have the list of fragments file for video and audio, how do i merge them manually?

Fragments(audio_und=0) to Fragments(audio_und=27300053333)
Fragments(video=0) to Fragments(video=27280000000)
manifest file as below


<?xml version="1.0" encoding="UTF-8" ?>
<SmoothStreamingMedia MajorVersion="2" MinorVersion="1" Duration="27300266666">
<StreamIndex Type="video" Url="QualityLevels({bitrate})/Fragments(video={start time})" Name="video" Chunks="1365" QualityLevels="4">
<QualityLevel Index="0" Bitrate="608000" FourCC="H264" MaxWidth="480" MaxHeight="270" CodecPrivateData="000000016764001fac2ca507823fac05 a810101200000300020000030065c0000128e00009470fe31c 1da18311600000000168e9083525" />
<QualityLevel Index="1" Bitrate="1024000" FourCC="H264" MaxWidth="854" MaxHeight="480" CodecPrivateData="000000016764001fac2ca50360f79bc0 5a808080a000000300200000065c00001f400000fa00fe31c1 da1a31160000000168e9083525" />
<QualityLevel Index="2" Bitrate="1408000" FourCC="H264" MaxWidth="960" MaxHeight="540" CodecPrivateData="000000016764001fac2ca503c045fbc0 5a808080a000000300200000065c04000abe00002af83f8c70 76868c45800000000168e9083525" />
<QualityLevel Index="3" Bitrate="2000000" FourCC="H264" MaxWidth="1280" MaxHeight="720" CodecPrivateData="000000016764001fac2ca5014016ec05 2808080a00000300020000030065c04000f4240003d093f8c7 076870c4580000000168e9083525" />
<c d="20000000">
<f i="0" s="154" />
<f i="1" s="237" />
<f i="2" s="335" />
<f i="3" s="452" />
</c>
<c d="20000000">
<f i="0" s="147" />
<f i="1" s="287" />
<f i="2" s="420" />
<f i="3" s="479" />
</c>
<c d="20000000">
<f i="0" s="152" />
<f i="1" s="206" />
<f i="2" s="246" />
<f i="3" s="470" />
</c>
<c d="20000000">
<f i="0" s="185" />
<f i="1" s="287" />
<f i="2" s="382" />
<f i="3" s="528" />
</c>
<c d="20000000">
<f i="0" s="137" />
<f i="1" s="261" />
<f i="2" s="354" />
<f i="3" s="514" />
</c>
<c d="20000000">
<f i="0" s="134" />
<f i="1" s="205" />
<f i="2" s="286" />
<f i="3" s="416" />
</c>
<c d="20000000">
<f i="0" s="174" />
<f i="1" s="274" />
<f i="2" s="370" />
<f i="3" s="509" />
</c>
<c d="20000000">
<f i="0" s="138" />
<f i="1" s="226" />
<f i="2" s="313" />
<f i="3" s="433" />
</c>
<c d="20000000">
<f i="0" s="150" />
<f i="1" s="246" />
<f i="2" s="340" />
<f i="3" s="495" />
</c>
<c d="20000000">
<f i="0" s="121" />
<f i="1" s="229" />
<f i="2" s="319" />
<f i="3" s="452" />
</c>
<c d="20000000">
<f i="0" s="164" />
<f i="1" s="270" />
<f i="2" s="362" />
<f i="3" s="511" />
</c>
.....

</c>
<c d="19840000">
<f i="0" s="24" />
</c>
<c d="20053333">
<f i="0" s="24" />
</c>
<c t="27300053333" d="213333">
<f i="0" s="1" />
</c>
</StreamIndex>
</SmoothStreamingMedia>