** Description changed:
For videos encoded with VP9 .webm, it takes VLC a long time to resume
playback if you skip ahead to later portions of the video.
When the very same videos are opened in the browser (Using either
- firefox or chromium), skipping ahead does resume playback quickly.
+ firefox or chromium), skipping ahead resumes playback quickly.
Testing:
To test this, try converting a long video to vp9 webm. For example, you
can convert an avi to webm using ffmpeg like this:
#Set threads to the number of real cores minus 1 (I just set it to 3 below) :
ffmpeg -i input.avi -c:v libvpx-vp9 -threads 3 -lossless 1 output.webm
#You can also convert a whole folder of avi to webm like this:
for file in *.avi; do ffmpeg -i "$file" -c:v libvpx-vp9 -threads 3 -lossless
1 "${file%avi}webm"; done
After this, try playing those videos in VLC and skip around the video to
see poor resume performance.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: vlc 2.2.2-5ubuntu0.16.04.4
ProcVersionSignature: Ubuntu 4.13.0-41.46~16.04.1-generic 4.13.16
Uname: Linux 4.13.0-41-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.17
Architecture: amd64
CurrentDesktop: Unity
Date: Sat May 12 13:37:09 2018
InstallationDate: Installed on 2018-05-12 (0 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64
(20180228)
SourcePackage: vlc
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/bugs/1770888
Title:
Bad webm vp9 Performance as You Skip Ahead
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