0000245: Ability to create thd+ac3 blu-ray compatible stream from already existing ac3 stream

ID	Project	Category	View Status	Date Submitted	Last Update

0000245	eac3to	bug	public	2014-12-05 19:57	2021-06-26 21:03

Reporter	nautilus7	Assigned To
Priority	normal	Severity	feature	Reproducibility	N/A
Status	new	Resolution	open

Summary	0000245: Ability to create thd+ac3 blu-ray compatible stream from already existing ac3 stream
Description	Currently, creating .thd+ac3 blu-ray compatible audio stream is only done by inputting an thd stream and on the fly encoding (using aften) an ac3 stream to multiplex with. This feature would allow to use ac3 streams created with dolby media producer (marginally better quality streams in comparison to aften), but it would also allow to use ac3 streams with completely different content that the thd stream.
Additional Information	It should be really easy to add such feature. The command line could remain unchanged e.g eac3to input.thd output.thd+ac3 1. Check whether file input.ac3 exists in the same directory as input.thd. 2. If not, then use old method: create .thd+ac3 using aften encoded .ac3 stream. 3. if there is input.ac3 then mux input.thd and input.ac3 together. In pseudo code: if (exists input.ac3) { mux(input.ac3, input.thd) } else { encode(input.ac3) mux(input.ac3, input.thd) }
Tags	No tags attached.

eac3to Version	3.27

Date Modified	Username	Field	Change
2014-12-05 19:57	nautilus7	New Issue
2021-06-26 21:03	ExDeus	Note Added: 0002807

ExDeus 2021-06-26 21:03 reporter ~0002807	A great use case for muxing an existing AC3 core with a THD track is when remuxing mkv (where only one stream per track is allowed, so THD+AC3 must be separate tracks) back to m2ts for BDMV (where a THD stream must have an AC3 core muxed in the same track).