Opened 17 months ago

Last modified 17 months ago

#5803 reopened defect

ffprobe reports wrong DAR

Reported by: zevarito 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 zevarito 17 months ago.

Download all attachments as: .zip

Change History (4)

Changed 17 months ago by zevarito

comment:1 Changed 17 months ago by zevarito

  • Resolution set to invalid
  • Status changed from new to closed

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 Changed 17 months ago by zevarito

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 Changed 17 months ago by cehoyos

  • Component changed from ffprobe to avcodec
  • Keywords vp8 added
  • Priority changed from normal to minor
  • Reproduced by developer set
  • Resolution invalid deleted
  • Status changed from closed to reopened
  • Version changed from unspecified to git-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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