Opened 5 years ago

Last modified 5 years ago

#5803 reopened defect

ffprobe reports wrong DAR

Reported by: Alvaro Gil Owned by:
Priority: minor Component: avcodec
Version: git-master Keywords: vp8
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

Summary of the bug:

When I try to inspect Aspect Ratio for a Portrait video (recorded by a WebRTC MCU) it reports 4:3 and 640x480.

I expect it to be 3:4 480x640.

This happen using either ffprobe or ffmpeg.

How to reproduce:

% ffprobe 402704584179446100.mkv
ffmpeg version 3.1.2 
built on OSX with brew

Please see attached video file.

Attachments (1)

402704584179446100.mkv (490.5 KB ) - added by Alvaro Gil 5 years ago.

Download all attachments as: .zip

Change History (4)

by Alvaro Gil, 5 years ago

Attachment: 402704584179446100.mkv added

comment:1 by Alvaro Gil, 5 years ago

Resolution: invalid
Status: newclosed

Alright I figured out that if I use -show_frames it reports correctly, seems like is not safe to trust in the first frame

comment:2 by Alvaro Gil, 5 years ago

Well, actually there is a problem with this particular video, it doesn't allow me to seek so read_intervals is failing, I have to get them all. There is a workaround to just get the information of a frame in the middle of the video and nothing else?

comment:3 by Carl Eugen Hoyos, 5 years ago

Component: ffprobeavcodec
Keywords: vp8 added
Priority: normalminor
Reproduced by developer: set
Resolution: invalid
Status: closedreopened
Version: unspecifiedgit-master

While the sample is horribly broken and cannot easily be used to show a bug and some people will likely prefer the current behaviour, I believe that this will change in the (not so near?) future.

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