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Bug 674920 - mpeg2enc: discards downstream mpegversion restrictions
mpeg2enc: discards downstream mpegversion restrictions
Status: RESOLVED OBSOLETE
Product: GStreamer
Classification: Platform
Component: gst-plugins-bad
git master
Other Linux
: Normal normal
: git master
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Blocks: 672439
 
 
Reported: 2012-04-27 08:20 UTC by Jens Georg
Modified: 2018-11-03 13:11 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
Sample program (5.18 KB, text/plain)
2012-04-27 08:20 UTC, Jens Georg 		Details
GST_DEBUG output (11.33 KB, application/octet-stream)
2012-04-27 08:27 UTC, Jens Georg 		Details

Description Jens Georg 2012-04-27 08:20:54 UTC 
Created attachment 212932 [details]
Sample program

Using the attached program with only mpeg2enc available (no ffenc_mpeg2video) to simulate the situation on Ubuntu 12.04 where encodebin seems to chose mpeg2enc over ffenc_mpeg2video (bug 672439)
Comment 1 Jens Georg 2012-04-27 08:27:56 UTC 
Created attachment 212934 [details]
GST_DEBUG output

GST_DEBUG=encodebin:5,mpeg2enc:5
Comment 2 Mark Nauwelaerts 2012-10-26 11:38:20 UTC 
This is due to a capsfilter video/mpeg,mpegversion=2,systemstream=false downstream of mpeg2enc, which does not consider that one and produces mpegversion=1 (as dictated by the default format setting).

So maybe we should add a 'auto' option to the format property in which case mpeg2enc should negotiate with downstream, though that might also be a confusing way to go about it.
Comment 3 Tim-Philipp Müller 2012-10-26 11:49:58 UTC 
I think it should negotiate as much as possible based on downstream caps restrictions, if there are any.

And we should change the default at least to Generic Mpeg-2 or something (I thought I'd done that already, but maybe it was elsewhere such as in mplex).
Comment 4 Mark Nauwelaerts 2012-10-26 19:24:30 UTC 
Agreed, unfortunately the downstream restrictions do not readily/evidently map to a particular choice of format (where there are still a few for version 1, 2 etc).  One could try to include resolutions wrt DVD but that still leaves some ambiguity.
Comment 5 GStreamer system administrator 2018-11-03 13:11:53 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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