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Old 14th July 2018, 22:41   #3  |  Link
Rollinnn
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Join Date: Dec 2015
Posts: 5
Slightly incorrect chapters time

I took 9 wav files (pcm 96 kHz/16 bits), all exacly one second (96000 samples) long, merged them to mka using MKVToolnix 25.0.0 with creating chapters for each appended file.
It seems obvious that each chapter should be exactly 1 second long and second chapter should start exactly at 1 second, third chapter should start exactly at 2 second and so on.
But using Info tool in MKVToolnix or MKVCleaver i can see that chapters time is slightly off.
So question: is this normal? If not, then what can be reason of this?
Here are chapters as extracted by MKVCleaver:
Code:
<?xml version="1.0"?>
<!-- <!DOCTYPE Chapters SYSTEM "matroskachapters.dtd"> -->
<Chapters>
  <EditionEntry>
    <EditionFlagHidden>0</EditionFlagHidden>
    <EditionFlagDefault>0</EditionFlagDefault>
    <EditionUID>6106875923387060889</EditionUID>
    <ChapterAtom>
      <ChapterUID>7385917724078987421</ChapterUID>
      <ChapterTimeStart>00:00:00.000000000</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 01</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>12105901406932053652</ChapterUID>
      <ChapterTimeStart>00:00:00.999996225</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 02</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>4640490012402631944</ChapterUID>
      <ChapterTimeStart>00:00:02.000002865</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 03</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>143719244427371845</ChapterUID>
      <ChapterTimeStart>00:00:02.999999090</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 04</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>11556711324240879944</ChapterUID>
      <ChapterTimeStart>00:00:03.999995315</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 05</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>6789293790652085347</ChapterUID>
      <ChapterTimeStart>00:00:05.000001955</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 06</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>815895495329946186</ChapterUID>
      <ChapterTimeStart>00:00:05.999998180</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 07</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>13740887356558005711</ChapterUID>
      <ChapterTimeStart>00:00:07.000004820</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 08</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>7577353493033748017</ChapterUID>
      <ChapterTimeStart>00:00:08.000001045</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Chapter 09</ChapterString>
        <ChapterLanguage>eng</ChapterLanguage>
      </ChapterDisplay>
    </ChapterAtom>
  </EditionEntry>
</Chapters>
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