Cannot Read Duration of WebM Video

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#931 Cannot Read Duration of WebM Video

Milestone: Incorrect_result

Status: open-accepted

Owner: Jerome Martinez

Labels: None

Priority: 5

Updated: 2015-07-02

Created: 2015-06-20

Creator: Etienne

Private: No

When reading WebM files downloaded from YouTube, MediaInfo.dll doesn't read the video duration. The "Duration" field is empty. The "Width" and "Height" fields, however, are read fine.

Discussion

Jerome Martinez - 2015-06-20

status: open --> pending-works-for-me

assigned_to: Jerome Martinez
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Jerome Martinez - 2015-06-20

Mine are OK.
Please provide a sample file.

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Etienne - 2015-06-20

OK I tried with another video and it worked.

This video, however, is strange.
https://www.youtube.com/watch?v=UuFlNIU2TeE

YouTube says there is a 360p version available, and when you download it, you get a 240p video. It is in WebM format, but MediaInfo.dll can't extract its duration.

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Jerome Martinez - 2015-06-20

I downloaded the 240p version, and it is OK:
General
Complete name : alaska ocean - DASH.webm
Format : WebM
Format version : Version 2
File size : 1.18 MiB
Duration : 1mn 51s
Overall bit rate : 88.9 Kbps
Writing application : google
Writing library : google

Video
ID : 1
Format : VP9
Codec ID : V_VP9
Duration : 1mn 51s
Bit rate : 78.5 Kbps
Width : 320 pixels
Height : 240 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 30.000 fps
Bits/(Pixel*Frame) : 0.034
Stream size : 1.04 MiB (88%)
Language : English
Default : Yes
Forced : No

If you want me to deal with you bug report, provide the exact file, not a link to a web page, especially if I can not download easily exactly the same file as you.

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Etienne - 2015-06-20

Here's the file I have.
https://mega.co.nz/#!bZwEDBDK!4Y8R-vnnFFCxXZWRyaB2m0zKosPpxLdPiKsXkjDbya0

Ah, since the audio and video have to be muxed after downloading, that won't exactly be the same as what you downloaded.

Last edit: Etienne 2015-06-20

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Jerome Martinez - 2015-06-21

muxed

so not the video from the link, and it depends of your muxer.

I see the duration in the general part and in the audio part. video duration is missing.

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Jerome Martinez - 2015-06-21

Accepted.

Warning: non-paid feature request are set to low priority, I don't know when I have time to handle it.
If you desire to accelerate the development, don't hesitate to contact me for a quotation.

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Jerome Martinez - 2015-06-21

status: pending-works-for-me --> open-accepted
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Etienne - 2015-06-27

I'm working on an Open Source project as well
https://github.com/mysteryx93/NaturalGroundingPlayer

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Etienne - 2015-07-02

I found a workaround. Reading the Duration of the audio stream, instead of the video, works.

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