Opened 5 years ago
Closed 5 years ago
#12694 closed Patch - Feature (Won't Fix)
RAspberry pi: Update Playback Profiles
Reported by: | Owned by: | JYA | |
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Priority: | minor | Milestone: | unknown |
Component: | MythTV - Video Playback | Version: | Master Head |
Severity: | medium | Keywords: | raspberry pi |
Cc: | Ticket locked: | no |
Description
Recently I have found that there is some pixelation when viewing certain channels using openmax. When viewing then using ffmpeg, that problem disappears. Either there are errors in the stream which are handled better by ffmpeg, or some mpeg2 feature is being used that is not supported by openmax.
The raspberry pi 2 is able to sustain a 1080i stream using ffmpeg decoder and openmax renderer.
I have updated the OpenMAX Normal profile to add an entry where ffmpeg is used for Standard Definition. I have also added "OpenMAX High Quality" which does ffmpeg and openmax for all resolutions.
On raspberry pi 2, OpenMAX high Quality is fine, but has minor glitches with the OSD. I suspect it may work better on a raspberry pi 3.
Attachments (1)
Change History (6)
Changed 5 years ago by
Attachment: | ticket_12694_playback_groups.patch added |
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comment:1 Changed 5 years ago by
This maybe needs a re-think - when selecting the "OpenMAX high Quality", MPEG2 plays fine, but x264 is very bad.
I found that you can simply disable the MPEG2 license key and select the openmax decoder - this falls back to ffmpeg for mpeg2 but still uses openmax for x264. That way I get high quality for both, but it is a kludgy solution.
comment:2 Changed 5 years ago by
Milestone: | unknown → 0.28.1 |
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Version: | Unspecified → Master Head |
comment:3 Changed 5 years ago by
Hi Peter, as you've said, this will actually degrade performance for those countries which use H.264 instead of, or in combination with MPEG-2.
comment:5 Changed 5 years ago by
Milestone: | 0.28.1 → unknown |
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Resolution: | → Won't Fix |
Status: | new → closed |
Patch to update playback profiles