[FoLUG] Riproduzione video HD(x264) su ubuntu

[Raffaele Ravaioli]

> In genere i file che puoi trovare in rete con quella codifica riportano
> nel nome anche la dicitura x264 ma non è obbligatorio. Comunque se
> cerchi con google nome file + 720p + x264 puoi farti un'idea.
> In alternativa se li apri con mplayer da shell ti dice la codifica.

Ho aperto questo:


Playing /home/raffaele/10,000 B.C. - Teaser.mp4.
Quicktime/MOV file format detected.
[mov] Video stream found, -vid 0
[mov] Audio stream found, -aid 1
VIDEO:  [avc1]  1280x544  24bpp  23.976 fps    0.0 kbps ( 0.0 kbyte/s)
xscreensaver_disable: Could not find XScreenSaver window.
GNOME screensaver disabled
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
==========================================================================
Forced audio codec: mad
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
AUDIO: 48000 Hz, 2 ch, s16le, 128.1 kbit/8.34% (ratio: 16017->192000)
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio) decoder)
==========================================================================
AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 1280 x 544 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 2.35:1 - prescaling to correct movie aspect.
VO: [xv] 1280x544 => 1280x544 Planar YV12
[ASPECT] Warning: No suitable new res found!
A:  18.1 V:  17.1 A-V:  0.961 ct:  0.022 412/412 79%  4%  4.8% 50 0

           ************************************************
           **** Your system is too SLOW to play this!  ****
           ************************************************

Possible reasons, problems, workarounds:
- Most common: broken/buggy _audio_ driver
  - Try -ao sdl or use the OSS emulation of ALSA.
  - Experiment with different values for -autosync, 30 is a good start.
- Slow video output
  - Try a different -vo driver (-vo help for a list) or try -framedrop!
- Slow CPU
  - Don't try to play a big DVD/DivX on a slow CPU! Try some of the lavdopts,
    e.g. -vfm ffmpeg -lavdopts lowres=1:fast:skiploopfilter=all.
- Broken file
  - Try various combinations of -nobps -ni -forceidx -mc 0.
- Slow media (NFS/SMB mounts, DVD, VCD etc)
  - Try -cache 8192.
- Are you using -cache to play a non-interleaved AVI file?
  - Try -nocache.
Read DOCS/HTML/en/video.html for tuning/speedup tips.
If none of this helps you, read DOCS/HTML/en/bugreports.html.

Dunque:
In Windows con scheda Nvidia integrata va a "scattini";
in Ubuntu con Totem va bene (dico... bene) fino quasi alla fine del
tryler e poi scatta un po';
con VLC in Ubuntu va a scatti e squadretta;
con Mplayer va a scattini come sotto Windows e considerate che l'ho
provato nel mio "piccolino" che ha una scheda Intel con 8Mb di memoria
dedicata. :-O

Ciao.