[FFmpeg-devel] [PATCH 2/3] avformat/mov: Populate packet duration using stts atom instead of guessing

[Michael Niedermayer]

On Thu, Nov 21, 2024 at 12:23:41AM -0300, James Almer wrote:
> From: Darren Mo <fumoboy007 at me.com>
> 
> Fixes tickets #7855 and #11312.
> 
> Co-authored-by: James Almer <jamrial at gmail.com>
> Signed-off-by: James Almer <jamrial at gmail.com>
> ---
> This is an alternative, better approach to the same issue.
> 
>  libavformat/isom.h                            |   3 +
>  libavformat/mov.c                             | 180 ++++++++++++++++--
>  tests/ref/fate/copy-trac236                   |   4 +-
>  tests/ref/fate/filter-fps                     |   1 +
>  tests/ref/fate/filter-fps-cfr                 |   1 +
>  tests/ref/fate/filter-meta-4560-rotate0       |   4 +-
>  tests/ref/fate/gaplessenc-itunes-to-ipod-aac  |   2 +-
>  tests/ref/fate/matroska-dovi-write-config8    |   4 +-
>  .../fate/matroska-non-rotation-displaymatrix  |   6 +-
>  tests/ref/fate/mov-aac-2048-priming           |   2 +-
>  tests/ref/fate/mov-zombie                     |   4 +-
>  11 files changed, 181 insertions(+), 30 deletions(-)

breaks fate

--- ./tests/ref/fate/mov-mp4-iamf-stereo	2024-11-17 02:14:20.475742935 +0100
+++ tests/data/fate/mov-mp4-iamf-stereo	2024-11-21 22:14:37.421521040 +0100
@@ -15,7 +15,7 @@
 0,      27648,      27648,     4608,     1422, 0x2f9d47c5
 0,      32256,      32256,     4608,     1768, 0x2a044b99
 0,      36864,      36864,     4608,     1534, 0xb0b35a3f
-0,      41472,      41472,     2628,      926, 0xc26a5eae
+0,      41472,      41472,     4608,      926, 0xc26a5eae
 [STREAM_GROUP]
 index=0
 id=0x1

 [...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Asymptotically faster algorithms should always be preferred if you have
asymptotical amounts of data
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