#2099: FFMPEG Does not allow TrueHD, DTS-Master Audio or DTS in .M4V even though
format supports it
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Reporter: JohnGalt | Owner:
Type: enhancement | Status: closed
Priority: wish | Component: avformat
Version: git-master | Resolution:
Keywords: mov dca thd | needs_more_info
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Changes (by cehoyos):
* status: new => closed
* version: unspecified => git-master
* resolution: => needs_more_info
Comment:
I will close this as "needs_more_info" because there is neither a sample
for TrueHD in isom nor is it clear on the mp4ra page that TrueHD should be
supported at all (mlp is not exactly the same thing and I would be mildly
surprised if Dolby chose "mlpa" as code and not "thda" or similar).
You repeatedly mention "m4v": In FFmpeg nomenclature, "m4v" means mov-for-
iPod or at least iDevice. These devices currently do neither support
TrueHD nor DTS (and not DTS-HD) and there is currently to the best of my
knowledge no indication whatsoever that this will change in the future. So
I think this ticket should be about mov or isom in general but not "m4v"
(using the FFmpeg meaning).
Muxing DTS in mov works fine (although it may never have been tested with
any proprietary software that is supposed to support mov and DTS), if you
want to mux DTS-HD use -atag dtsh, for DTS-HD Master (lossless) use -atag
dtsl.
If you can show that muxing DTS in mov is broken in the sense that it
cannot be played with software that is supposed to play it (I would not be
surprised at all), please open a new ticket with more information / a
sample that allows playback.
If you can provide a TrueHD in mov sample, please reopen this ticket.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2099#comment:18>
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