[FFmpeg-trac] #9765(undetermined:new): Regresion due to "avcodec/wmadec: fix WMA gapless playback"

[FFmpeg]

#9765: Regresion due to "avcodec/wmadec: fix WMA gapless playback"
-------------------------------------+-------------------------------------
             Reporter:  Mika         |                     Type:  defect
  Fischer                            |
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 I think the commit 19802d170a304f5853d92e01d0513b9e06897d61, which was
 applied on 2021-09-12 in and is included in n5.0 and n5.0.1 causes a
 regression.

 This is the (shortened) diff for the test decoding in the patch:

 {{{#!patch
 diff --git a/tests/ref/fate/flcl1905 b/tests/ref/fate/flcl1905
 index 5f5245ebcf..d702139db8 100644
 --- a/tests/ref/fate/flcl1905
 +++ b/tests/ref/fate/flcl1905
 @@ -1,6 +1,4 @@
  packet|[...]|pts=0|pts_time=0.000000|[...]
 -frame|[...]|pts=0|pts_time=0.000000|[...]
 -frame|[...]|pts=N/A|pts_time=N/A|[...]
  frame|[...]|pts=N/A|pts_time=N/A|[...]
 }}}

 As can be seen, the patch causes the first two frames to be dropped, which
 might be OK to better conform to the MS decoder.

 The problem is that only the first frame had the timestamp info from the
 packet. Since that got dropped, now the first frame decoded from the
 packet has no timestamp info.

 This causes us issues since we assumed that the first audio frame decoded
 after seeking always has timestamp info.

 See also http://ffmpeg.org/pipermail/ffmpeg-devel/2022-April/295763.html
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9765>
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