[FFmpeg-trac] #9197(undetermined:new): DNG - aspect ratio suddely changes mid-clip
FFmpeg
trac at avcodec.org
Wed Apr 21 15:55:19 EEST 2021
#9197: DNG - aspect ratio suddely changes mid-clip
-------------------------------------+-------------------------------------
Reporter: Eugene | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
In a DNG (image2) -> H.264 (libx264) transcode, the output aspect ratio
and frame alignment suddenly changes around frame 12
First 12 frames (as expected, but off color):
[[Image(https://i.imgur.com/83Fs2Ya.png)]]
Frames 13 onwards (layout distorted):
[[Image(https://i.imgur.com/tvD8K2N.png)]]
How to reproduce:
Simple repro (25 frames, all identical):
https://www.dropbox.com/s/556rltwsukogc4q/ffmpeg-repro.tgz?dl=0
{{{ffmpeg -stats -f image2 -start_number 0 -i
D001_C001_20200907_R0%04d.dng -f mp4 -vcodec libx264 -y -s 1280x720
-pix_fmt yuv420p out.mp4}}}
Tested with ffmpeg 4.2, 4.4 and 4.5-dev (git-2021-03-20-c361fa9), also the
same result with a different output encoder and format.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9197>
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