[mythtv-users] A test for anyone using vdpau on 32-bit x86, especially with 30.0

[Peter Bennett]

On 5/23/19 8:57 AM, Tom Dexter wrote:
> On 5/23/19, beppo <beppo75 at web.de> wrote:
>> On 5/19/19, Tom Dexter <digitalaudiorock at gmail.com[1]> wrote:
>>> / I'm trying to narrow down some vdpau decode issues with some (but not/
>>> / all) h264 videos as discussed here:/
>>>
>>> / https://lists.gt.net/mythtv/users/625246[2]/
>>>
>>> / I could use a favor in the form of a quick test from anyone here is/
>>> / using vdpau on 32 bit x86...especially anyone running version 30.0. If/
>>> / you could try playing this clip:/
>>>
>>> / http://jell.yfish.us/media/jellyfish-60-mbps-hd-h264.mkv[3]/
>>>
>>> / ...and see if it falls back to software decoding or if it uses vdpau./
>>> / For example from the playback menu Playback -> Playback Data, and see/
>>> / if it shows "H264 vdpau" or "H264 ffmpeg". That would be a huge help./
>>>
>>> / The failure of the vdpau decode for me seems to be related to the/
>>> / change in 30.0 to replace the ffmpeg avcodec_decode_video2 call with 2/
>>> / calls...one of which (avcodec_send_packet) is returning an/
>>> / AVERROR_INVALIDDATA error causing the fallback to software. I'm only/
>>> / guessing that it might be a 32 bit specific issue, because Peter (see/
>>> / the related bug) couldn't reproduce the failures./
>>>
>>> / The videos where I have issues decode and play fine with xine using/
>>> / vdpau, and I just verified that the version of xine-libs I'm using is/
>>> / still using the old avcodec_decode_video2 as was MythTV 29.1./
>>>
>>> / Thanks in advance!/
>>> / Tom/
>>>
>>> I've added a few notes regarding tests I've done to the related bug:
>>>
>>> https://code.mythtv.org/trac/ticket/13223[4]
>> _>_
>>> As noted there I've also reverted to 29.1 and can confirm that the
>>> problem videos play with vdpau decoding just fine. Again, I have no
>>> idea as to whether this is possibly a 32-bit only issue or not, but
>>> I'm hoping someone else might be able to duplicate the issue. Thanks!
>>> Tom
>> Hi Tom,
>> I have two ASRock ION 330HT
>> https://www.asrock.com/nettop/NVIDIA/ION%20330HT/
>> and I can reproduce the fallback to software decoded video, or better an
>> flip-book @ 10
>> frames per sec.
>> 1. ION is 18.04 Ubuntu 32bit
>> 2. ION is 16.04 Ubuntu 32bit
>> both maschines are on MythTV 30.0/fixes
>>
>> How can I help?
>>
>> Beppo
>>
> Thanks for the reply! That's significant because it supports my theory
> that the issue may be specific to 32bit. I'm not sure there's anything
> you can do to help offhand, but just confirming that you can reproduce
> this is great. I'll post a comment to the bug indicating this.
>
> Thanks again
> Tom
> _______________________________________________
Is x86 still a viable platform? I see from that web page that ION is a 
64-bit box. Ubuntu only supports 64-bit now, although Xubuntu is still 
available in 32-bit version. I recommend installing a 64-bit version on 
that ION.

I can look into this problem if there is a consensus that i386 still 
needs to be supported.

Peter