+ esdots has been modified as follow:

- For MPEG-2 streams it outputs informations about the size of a Gropu Of Pictures (GOP): min, max and average duration in sec. Video is supposed to be @25fps.
- For AVC streams, where the GOP is not formally defined, it computes the same date looking at the interval between two I or IDR frames (whichever comes first).

Using the switch -gop display the duration of each GOP (or pseudo-GOP fir AVC)

NOTE that a new function hab been added:
static char choose_nal_type(access_unit_p access_unit, int verbose);

Called by dots_by_access_unit, it returns a single character which specifies the type of the access unit.

+ tools.txt has been modified describing this new functionality and switch.

--HG--
extra : convert_revision : svn%3Aeff31bef-be4a-0410-a8fe-e47997df2690/trunk%408

docs/tools.txt

@@ -279,13 +279,22 @@ For instance::
     [E>iEUUbEUbEUpEUbEUbEUpEUbEUbEUpEUbEUbEU[E>iEUUbEUbEUpEUbEUbEUpEUbEUbEU
     pEUbEUbEU[E>iEUUbEU
     Found 1000 MPEG2 items
+    GOP times (s): max=0.4800, min=0.1200, mean=0.448125
 
 
-If the ``-v`` switch is used, then an explanation of the meaning of the
+If the ``-v'' switch is used, then an explanation of the meaning of the
 characters output will be prepended (it is slightly different depending on
 whether the input is MPEG-2 or MPEG-4/AVC).
 
-
+If the ``-gop'' switch is used, then each GOP duration is displayed. For H.264, where the GOP is not defined, we retrive this data by measuring the time between to I or IDR frames.
+It looks like this::
+
+    [E>iEbEbEpEbEbEpEbEbEpEbEbE: 0.4800s
+    [E>iEbEbE: 0.1200s
+    [E>iEbEbEpEbEbEpEbEbEpEbEbE: 0.4800s
+    ...
+
+
 esfilter
 ========
 Reads an input video stream and outputs it to another file, possibly filtering