[mythtv-users] vdpau and .mp4 playback
Nick Rout
nick.rout at gmail.com
Mon Nov 29 02:33:29 UTC 2010
On Mon, Nov 29, 2010 at 12:00 PM, Kevin Ross <kevin at familyross.net> wrote:
> On 11/28/2010 7:07 AM, Gerald Brandt wrote:
>>
>> Hi,
>>
>> ----- Original Message -----
>>>
>>> From: "Jean-Yves Avenard"<jyavenard at gmail.com>
>>> To: "Discussion about MythTV"<mythtv-users at mythtv.org>
>>> Sent: Saturday, November 27, 2010 7:26:14 PM
>>> Subject: Re: [mythtv-users] vdpau and .mp4 playback
>>> Hi
>>>
>>> On 28 November 2010 11:29, Gerald Brandt<gbr at majentis.com> wrote:
>>>>
>>>> Hi,
>>>>
>>>> I use MythBuntu 10.10 running .23 fixes.
>>>>
>>>> Lately, I've been finding H264 .mkv and .mp4 files that won't
>>>> (can't?) use vdpau acceleration. From my brief looks at the files,
>>>> it all looks OK, h264 video at 1280 x 5xx (528 or 544), 24 FPS, and
>>>> MPEG-4 ACC or Dolby AC-3 audio. I really can't see a difference
>>>> between one that works, and one that doesn't.
>>>
>>> What H264 encoding profile are they using ?
>>>
>>> VDPAU only supports supports some h264's profiles (4:2:0 profiles such
>>> as baseline/main/high). Things like lossless h264 or High 4:4:4
>>> Predictive Profile aren't supported by VDPAU.
>>>
>>> But it's been a while since I looked into VDPAU (over a year now) this
>>> may have changed by now.
>>>
>>> Regarding what Robert said, the resolutions restrictions also differ
>>> according to the nvidia cards you are using
>>
>> My system is an ION based one.
>>
>> This file plays:
>> Format : Matroska
>> File size : 2.17 GiB
>> Duration : 2h 6mn
>> Overall bit rate : 2 470 Kbps
>> Encoded date : UTC 2008-09-13 04:20:47
>> Writing application : mkvmerge v2.2.0 ('Turn It On Again')
>> built on Mar 4 2008 12:58:26
>> Writing library : libebml v0.7.7 + libmatroska v0.8.1
>>
>> Video
>> ID : 1
>> Format : AVC
>> Format/Info : Advanced Video Codec
>> Format profile : High at L3.1
>> Format settings, CABAC : Yes
>> Format settings, ReFrames : 5 frames
>> Codec ID : V_MPEG4/ISO/AVC
>> Duration : 2h 6mn
>> Bit rate : 1 780 Kbps
>> Nominal bit rate : 4 325 Kbps
>> Width : 1 280 pixels
>> Height : 528 pixels
>> Display aspect ratio : 2.40:1
>> Frame rate : 23.976 fps
>> Color space : YUV
>> Chroma subsampling : 4:2:0
>> Bit depth : 8 bits
>> Scan type : Progressive
>> Bits/(Pixel*Frame) : 0.110
>> Stream size : 1.57 GiB (72%)
>> Writing library : x264 core 61 r957 7ce0f2c
>> Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 /
>> analyse=0x3:0x133 / me=umh / subme=6 / brdo=1 / mixed_ref=1 / me_range=16 /
>> chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 /
>> chroma_qp_offset=0 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=3 /
>> b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / bime=1 /
>> keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=2pass / bitrate=4325 /
>> ratetol=1.0 / qcomp=1.00 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 /
>> qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=2:1.00
>> Language : English
>>
>> Audio
>> ID : 2
>> Format : AC-3
>> Format/Info : Audio Coding 3
>> Mode extension : CM (complete main)
>> Codec ID : A_AC3
>> Duration : 2h 6mn
>> Bit rate mode : Constant
>> Bit rate : 640 Kbps
>> Channel(s) : 6 channels
>> Channel positions : Front: L C R, Side: L R, LFE
>> Sampling rate : 48.0 KHz
>> Bit depth : 16 bits
>> Compression mode : Lossy
>> Stream size : 577 MiB (26%)
>> Title : AC 640 Kbps
>> Language : English
>>
>> And this file does not:
>>
>> Format : Matroska
>> File size : 1.35 GiB
>> Duration : 2h 20mn
>> Overall bit rate : 1 382 Kbps
>> Encoded date : UTC 2010-11-24 12:50:05
>> Writing application : mkvmerge v3.0.0 ('Hang up your
>> Hang-Ups') built on Dec 29 2009 00:24:14
>> Writing library : libebml v0.7.7 + libmatroska v0.8.1
>>
>> Video
>> ID : 1
>> Format : AVC
>> Format/Info : Advanced Video Codec
>> Format profile : Main at L3.1
>> Format settings, CABAC : No
>> Format settings, ReFrames : 3 frames
>> Codec ID : V_MPEG4/ISO/AVC
>> Duration : 2h 20mn
>> Nominal bit rate : 1 800 Kbps
>> Width : 1 280 pixels
>> Height : 528 pixels
>> Display aspect ratio : 2.40:1
>> Frame rate : 23.976 fps
>> Color space : YUV
>> Chroma subsampling : 4:2:0
>> Bit depth : 8 bits
>> Scan type : Progressive
>> Bits/(Pixel*Frame) : 0.111
>> Writing library : x264 core 79
>> Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 /
>> analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=0
>> / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11
>> / chroma_qp_offset=-2 / threads=3 / nr=0 / decimate=1 / mbaff=0 /
>> constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=1 / b_bias=0 /
>> direct=1 / wpredb=0 / wpredp=2 / keyint=240 / keyint_min=24 / scenecut=40 /
>> rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=1800 / ratetol=1.0 /
>> qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 /
>> ip_ratio=1.40 / aq=1:1.00
>> Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE
>> RP177
>> Transfer characteristics : BT.709-5, BT.1361
>> Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709,
>> SMPTE RP177
>>
>> Audio
>> ID : 2
>> Format : AAC
>> Format/Info : Advanced Audio Codec
>> Format version : Version 4
>> Format profile : LC
>> Codec ID : A_AAC
>> Duration : 2h 20mn
>> Channel(s) : 6 channels
>> Channel positions : Front: L C R, Side: L R, LFE
>> Sampling rate : 48.0 KHz
>> Compression mode : Lossy
>> Language : English
>>
>>
>> What's the best app to convert the bad playing file into a good one?
>> Arista?
>>
>> Gerald
>
> It looks like you found some encoder settings that will work. Just use
> those settings when you convert your Blu-Ray or TV recordings to .mkv files.
> The ones with the settings that don't work, you'll have to transcode again.
> If you're using Handbrake, then I know for a fact the "High Profile" preset
> works well with VDPAU.
I was just looking at an nvidia readme (for 195.36.24) which notes
some nvidia chipsets as supporting feature set B, others are noted as
B 1.
Appendix H tells me:
"VDPAU FEATURES NOTE 1
GPUs with this note may not support H.264 streams with the following widths:
49, 54, 59, 64, 113, 118, 123, 128 macroblocks (769-784, 849-864, 929-944,
1009-1024, 1793-1808, 1873-1888, 1953-1968, 2033-2048 pixels)."
I wonder if this helps explain inconsistent findings across similar files?
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