[mythtv-users] DTS Passthrough

[Jean-Yves Avenard]

Hi

On 30 June 2010 21:59, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> Hi
>
> On 30 June 2010 21:43, mythtv <mythtv at moasat.dyndns.org> wrote:
>> Yes, I do.  I tried that figuring that it has already known that the codec
>> is either AC3 or DTS and that I've already told it to pass those through, it
>> might not matter whether the NVP thinks passthru is possible, although I'm
>> sure there are reasons why it should disable it at times.
>
> I have identified the issue...
> Fixing an earlier bug, caused all DTS or AC3 audio to be decoded then
> re-encoded :(
>

Here is the fix:

Index: libs/libmythtv/avformatdecoder.cpp
===================================================================
--- libs/libmythtv/avformatdecoder.cpp	(revision 25221)
+++ libs/libmythtv/avformatdecoder.cpp	(working copy)
@@ -4713,6 +4713,13 @@
                              audioOut.do_passthru);

     GetNVP()->ReinitAudio();
+    if (using_passthru != DoPassThrough(codec_ctx))
+    {
+            // detected audio capabilities changed half-way
+            // recheck audio stream
+        VERBOSE(VB_AUDIO, LOC + "Audio config changed. Rescanning");
+        return SetupAudioStream();
+    }

     if (LCD *lcd = LCD::Get())
     {