Dotaz: GT8600 a fullhd

[marek_hb]

ahoj, jen bych potřeboval upřesnit - mám gk nvidia 8600GT, C2DE6600, desku od gigabite a 4 giga ram

měla by tahle sestava pod linuxem zvládat full hd videa v pohodě, nebo už je to na/za hranou?

co mám videa z gopro, tak se sekají (je jedno, jestli to zkouším přes nvidi driver, nebo nuoveau) a při tom si nemyslím, že je to úplně slabá sestava, tak jen jestli mám zkoušet nějaká nastavení, nebo je to marná snaha

při tom některé přehrávače jsou relativně ok (totem), některé mimo úplně (vlc)

Odpovědi

[OldFrog {Ondra Nemecek}]

Odhadem si myslím že by sestava fullhd stíhat mohla. V každém případě bych testoval chování s několika referenčními full hd videi (aby se vyloučil vliv kodeku apod).

Pak záleží na čem se to seká - dekódování nebo načítání z disku? Zkusil bych video načítat z ramdisku - pokud se nebude sekat, je problém v rychlosti IO. Pokud se sekat bude, může nestíhat dekódování - pak bych zkusil zprovoznit http://en.wikipedia.org/wiki/VDPAU

[marek_hb]

takže video:

marek@debian-desktop:~/pokus$ mediainfo GOPR0435.MP4 
General
Complete name                            : GOPR0435.MP4
Format                                   : MPEG-4
Format profile                           : JVT
Codec ID                                 : avc1
File size                                : 163 MiB
Duration                                 : 44s 912ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 30.4 Mbps
Encoded date                             : UTC 2014-03-30 15:09:21
Tagged date                              : UTC 2014-03-30 15:09:21
AMBA                                     : 

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.2
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 1 frame
Format settings, GOP                     : M=1, N=15
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 44s 912ms
Bit rate mode                            : Variable
Bit rate                                 : 30.0 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 59.940 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.241
Stream size                              : 161 MiB (99%)
Title                                    : GoPro AVC
Language                                 : English
Encoded date                             : UTC 2014-03-30 15:09:21
Tagged date                              : UTC 2014-03-30 15:09:21
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 44s 907ms
Bit rate mode                            : Constant
Bit rate                                 : 128 Kbps
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Stream size                              : 702 KiB (0%)
Title                                    : GoPro AAC
Language                                 : English
Encoded date                             : UTC 2014-03-30 15:09:21
Tagged date                              : UTC 2014-03-30 15:09:21

přehraje mplayer -vo vdpau -vc ffh264vdpau GOPR0435.MP4

v pohodě a bez sekání, i když píše že system je "slow"

video:

marek@debian-desktop:~/pokus$ mediainfo GOPR0440.MP4 
General
Complete name                            : GOPR0440.MP4
Format                                   : MPEG-4
Format profile                           : JVT
Codec ID                                 : avc1
File size                                : 47.7 MiB
Duration                                 : 8s 342ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 47.9 Mbps
Encoded date                             : UTC 2014-03-31 17:08:04
Tagged date                              : UTC 2014-03-31 17:08:04
AMBA                                     : 

u videa:
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L5.0
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 1 frame
Format settings, GOP                     : M=1, N=8
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 8s 342ms
Bit rate mode                            : Variable
Bit rate                                 : 46.2 Mbps
Maximum bit rate                         : 45.0 Mbps
Width                                    : 2 704 pixels
Height                                   : 1 524 pixels
Original height                          : 1 536 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.374
Stream size                              : 46.0 MiB (96%)
Title                                    : GoPro AVC
Language                                 : English
Encoded date                             : UTC 2014-03-31 17:08:04
Tagged date                              : UTC 2014-03-31 17:08:04
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 8s 341ms
Bit rate mode                            : Constant
Bit rate                                 : 128 Kbps
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Stream size                              : 130 KiB (0%)
Title                                    : GoPro AAC
Language                                 : English
Encoded date                             : UTC 2014-03-31 17:08:04
Tagged date                              : UTC 2014-03-31 17:08:04

už hlásí:

marek@debian-desktop:~/pokus$ mplayer -vo vdpau -vc ffh264vdpau GOPR0440.MP4     
Failed to read /etc/mplayer/mplayer.conf.local: No such file or directory
Warning unknown option include at line 177
MPlayer SVN-r36545 (C) 2000-2013 MPlayer Team
Can't open joystick device /dev/input/js0: No such file or directory
Can't init input joystick
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing GOPR0440.MP4.
libavformat version 55.34.101 (internal)
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang eng
VIDEO:  [H264]  2704x1524  24bpp  29.970 fps  46235.6 kbps (5644.0 kbyte/s)
Clip info:
 major_brand: avc1
 minor_version: 0
 compatible_brands: avc1isom
 creation_time: 2014-03-31 17:08:04
Load subtitles in ./
==========================================================================
Forced video codec: ffh264vdpau
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 55.52.102 (internal)
Selected video codec: [ffh264vdpau] vfm: ffmpeg (FFmpeg H.264 (VDPAU))
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 2 ch, floatle, 128.0 kbit/4.17% (ratio: 16000->384000)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
AO: [alsa] 48000Hz 2ch floatle (4 bytes per sample)
Starting playback...
Movie-Aspect is 1.77:1 - prescaling to correct movie aspect.
VO: [vdpau] 2704x1524 => 2704x1524 H.264 VDPAU acceleration 
[vdpau] Failed creating VDPAU decoder: The size of a supplied object does not match the object it is being used with.
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.77:1 - prescaling to correct movie aspect.
VO: [vdpau] 2704x1524 => 2704x1524 H.264 VDPAU acceleration 
[vdpau] Unexpected reinit, query_format called too often?
[vdpau] Failed creating VDPAU decoder: The size of a supplied object does not match the object it is being used with.
FATAL: Cannot initialize video driver.
Too many buffered pts
Too many buffered pts

čtu to z SSD, takže IO operace to snad nebrzdí

mplayer2 píše: "Cannot find codec 'h264_vdpau' in libavcodec..." a přehraje jen zvuk