[Bug 796938] New: All mkv files generated by matroskamux are broken with audio and video present
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Wed Aug 8 22:56:50 UTC 2018
https://bugzilla.gnome.org/show_bug.cgi?id=796938
Bug ID: 796938
Summary: All mkv files generated by matroskamux are broken with
audio and video present
Classification: Platform
Product: GStreamer
Version: 1.14.2
OS: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: gst-plugins-good
Assignee: gstreamer-bugs at lists.freedesktop.org
Reporter: hiwatari.seiji at gmail.com
QA Contact: gstreamer-bugs at lists.freedesktop.org
GNOME version: ---
No matter what pipeline generates a matroska file, the generated file is always
broken when audio and video are present.
# Generated from remuxing an existing mp4 file
wget https://www.sample-videos.com/video/mp4/720/big_buck_bunny_720p_10mb.mp4
gst-launch-1.0 filesrc location="big_buck_bunny_720p_10mb.mp4" ! parsebin
name="demux" ! h264parse ! queue ! matroskamux name="mux" ! filesink
location="1.mkv" demux. ! aacparse ! queue ! mux.
# Generated from test sources:
gst-launch-1.0 videotestsrc num-buffers=150 ! x265enc ! h265parse ! matroskamux
name=mux ! filesink location="2.mkv" audiotestsrc num-buffers=150 !
lamemp3enc ! mux.
# Generated from test-source only using video:
gst-launch-1.0 videotestsrc num-buffers=150 ! videoconvert ! x264enc !
matroskamux name=mux ! filesink location="3.mkv"
mkvalidate as well as mpv both complain about the files 1.mkv and 2.mkv,
whereas file 3.mkv does not seem to contain format errors.
The error does have something to do with keyframes, so this bug might have
something to do with that one:
https://bugzilla.gnome.org/show_bug.cgi?id=794105
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