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

[Tom Dexter]

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