Split m4b by chaptermark?

[The.Great.ESCape]

Is there a way to split an m4b by it's chaptermarks without transcoding, or a method of merging 2 or more multi-chapter m4bs?

[admin]

Use extract method to split m4b without transcoding and merge to merge them also without transcoding).

[The.Great.ESCape]

Extract works great as described, which I should have thought of myself if my brain were operating well at the time. However, my attempts to merge multi-chapter m4bs end up crashing every time. Extracting to individual chapters, and then merging works, but lowers the bitrate to 7 or 8 even though I manually set it to 126 CBR to match that of the source files. I am unsure why this is happening. Although, I have noticed in the past when merging AAC files that I have to manually set both the Sample Rate and Bitrate to match the source files for it to work. MP3s don't seem to require the same treatment.

[admin]

Could you, please, send at least 2 of those m4b files to xrecode@gmail.com (you could use https://wetransfer.com/)?

[The.Great.ESCape]

You mean the multi-chapter m4bs, and not the extracted m4As?

[admin]

Yes, the original files.