Re: mplex drops last access unit / frame from input video stream

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I have a modification to the patch. If the stream contains a sequence end,
we probably do not want it to include anything following the sequence end
in the input. This caused a problem on some of the inputs I tried since
there was one I-frame after the end-sequence header with a wacky SCR in it
so it could not be muxed.

diff -ru mjpegtools-2.0.0/mplex/videostrm_in.cpp
mjpegtools/mplex/videostrm_in.cpp
--- mjpegtools-2.0.0/mplex/videostrm_in.cpp     2005-12-09 15:05:26 -0500
+++ mjpegtools/mplex/videostrm_in.cpp   2014-08-13 10:25:27 -0400
@@ -314,6 +314,30 @@
                }
        }

+    // make sure the last AU gets added at the end of the stream,
+    // unless the stream contains a sequence end header
+    if (bs.eos() && AU_pict_data && num_seq_end == 0)
+    {
+        stream_length = bs.bitcount();
+        access_unit.start = AU_start;
+        access_unit.length = static_cast<int>(stream_length - AU_start)>>3;
+        access_unit.end_seq = 0;
+        avg_frames[access_unit.type-1]+=access_unit.length;
+
+        mjpeg_debug( "LAST AU %d %d %d @ %lld: DTS=%ud",
+                     decoding_order,
+                     access_unit.type,
+                     access_unit.length,
+                     bs.bitcount() / 8-4,
+                     static_cast<unsigned int>(access_unit.DTS/300) );
+
+        aunits.Append( access_unit );
+        decoding_order++;
+        AU_hdr = syncword;
+        AU_start = stream_length;
+        AU_pict_data = 0;
+    }
+

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<div dir=3D"ltr">I have a modification to the patch. If the stream contains=
 a sequence end, we probably do not want it to include anything following t=
he sequence end in the input. This caused a problem on some of the inputs I=
 tried since there was one I-frame after the end-sequence header with a wac=
ky SCR in it so it could not be muxed.<div class=3D"gmail_extra">
<br></div><div class=3D"gmail_extra"><div class=3D"gmail_extra">diff -ru mj=
pegtools-2.0.0/mplex/videostrm_in.cpp mjpegtools/mplex/videostrm_in.cpp</di=
v><div class=3D"gmail_extra">--- mjpegtools-2.0.0/mplex/videostrm_in.cpp =
=C2=A0 =C2=A0 2005-12-09 15:05:26 -0500</div>
<div class=3D"gmail_extra">+++ mjpegtools/mplex/videostrm_in.cpp =C2=A0 201=
4-08-13 10:25:27 -0400</div><div class=3D"gmail_extra">@@ -314,6 +314,30 @@=
</div><div class=3D"gmail_extra">=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 }</div><div class=3D"gmail_extra">=C2=A0 =C2=A0 =C2=A0 =C2=A0=
 }</div>
<div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">+ =C2=A0 =
=C2=A0// make sure the last AU gets added at the end of the stream,</div><d=
iv class=3D"gmail_extra">+ =C2=A0 =C2=A0// unless the stream contains a seq=
uence end header</div><div class=3D"gmail_extra">
+ =C2=A0 =C2=A0if (bs.eos() &amp;&amp; AU_pict_data &amp;&amp; num_seq_end =
=3D=3D 0)</div><div class=3D"gmail_extra">+ =C2=A0 =C2=A0{</div><div class=
=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0stream_length =3D bs.bitcount=
();</div><div class=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0access_uni=
t.start =3D AU_start;</div>
<div class=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0access_unit.length =
=3D static_cast&lt;int&gt;(stream_length - AU_start)&gt;&gt;3;</div><div cl=
ass=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0access_unit.end_seq =3D 0;=
</div><div class=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0avg_frames[ac=
cess_unit.type-1]+=3Daccess_unit.length;</div>
<div class=3D"gmail_extra">+</div><div class=3D"gmail_extra">+ =C2=A0 =C2=
=A0 =C2=A0 =C2=A0mjpeg_debug( &quot;LAST AU %d %d %d @ %lld: DTS=3D%ud&quot=
;,</div><div class=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 decoding_order,</div><div class=3D"gmail_ex=
tra">
+ =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 acc=
ess_unit.type,</div><div class=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 access_unit.length,</div><div=
 class=3D"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 bs.bitcount() / 8-4,</div><div class=3D"gmail_extra">+=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 stat=
ic_cast&lt;unsigned int&gt;(access_unit.DTS/300) );</div>
<div class=3D"gmail_extra">+</div><div class=3D"gmail_extra">+ =C2=A0 =C2=
=A0 =C2=A0 =C2=A0aunits.Append( access_unit );</div><div class=3D"gmail_ext=
ra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0decoding_order++;</div><div class=3D"gmail=
_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0AU_hdr =3D syncword;</div><div class=
=3D"gmail_extra">
+ =C2=A0 =C2=A0 =C2=A0 =C2=A0AU_start =3D stream_length;</div><div class=3D=
"gmail_extra">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0AU_pict_data =3D 0;</div><div cl=
ass=3D"gmail_extra">+ =C2=A0 =C2=A0}</div><div class=3D"gmail_extra">+</div=
><div><br></div><br></div></div>

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