MakeMKV picks wrong LPCM codec-id

[mike admin]

This is fixed ong ago by having a setting in a conversion profile. You can create "always LPCM" profile and specify "raw" WAV header for all LPCM data.

[cipher]

This is fixed ong ago by having a setting in a conversion profile. You can create "always LPCM" profile and specify "raw" WAV header for all LPCM data.

Hi Mike.

Thanks for this info. I hadn't read about conversion profiles before so this is exciting to know there are some extra settings we can control when creating MKVs.

When I checked the default conversion profile XML file (default.mmcp.xml), these are the relevant settings for LPCM:

-<outputSettings outputFormat="LPCM-raw" name="lpcm">
<description lang="eng">Save as raw LPCM</description>
<description lang="ger">Als RAW LPCM speichern</description>
</outputSettings>

-<outputSettings outputFormat="LPCM-wavex" name="wavex">
<description lang="eng">Save as LPCM in WAV container</description>
<description lang="ger">Als LPCM im WAV-Container speichern</description>
</outputSettings>

<!-- Save LPCM mono or stereo as raw LPCM -->
-<trackSettings input="LPCM-stereo">
<output defaultSelection="$app_DefaultSelectionString" outputSettingsName="lpcm"> </output>
</trackSettings>

<!-- Put multi-channel LPCM into WAVEX container-->
-<trackSettings input="LPCM-multi">
<output defaultSelection="$app_DefaultSelectionString" outputSettingsName="wavex"> </output>
</trackSettings>

Based on this XML and your post, it looks like it would only be a matter of changing the setting outputSettingsName="wavex" to outputSettingsName="lpcm" in that last TrackSettings XML branch (bolded part above).

Since mono or stereo LPCM are already configured this way, and confirmed to work, is there a reason multi-channel LPCM is defaulting to "wavex" in these profiles?

[mike admin]

Based on this XML and your post, it looks like it would only be a matter of changing the setting outputSettingsName="wavex" to outputSettingsName="lpcm" in that last TrackSettings XML branch (bolded part above).

Yes, this is correct. Make sure to rename the profile from "default" as MakeMKV will discard profiles with duplicate names.

Since mono or stereo LPCM are already configured this way, and confirmed to work, is there a reason multi-channel LPCM is defaulting to "wavex" in these profiles?

Because there is no way to put channel mask (what channels are present and in what order) into LPCM container. A 4-channel audio may be 3.1(L+C+R+LFE) or 2/2 (L+R+BL+BR). If you are willing to assume that every 6-channel audio is 5.1 then there is no need for wavex header. This is the only reason.