[mythtv-users] Stuttering / tearing video in recordings - PVR-250, Celeron 500MHz

Craig Partin cpartin at gmail.com
Thu Jan 13 11:14:26 EST 2005


I had a very similar system that worked "reasonably" well.  You
absolutely cannot use the machine for anything else.  I killed all
non-essential programs/daemons.   Try re-niceing X and the frontend
process to -19.  Also, try a lower bitrate.  Mine was around 2200 for
the video I think.


On Thu, 13 Jan 2005 10:54:08 -0500, John Johnson <johnatl at mac.com> wrote:
> This is so close to working perfectly that it's already really cool. I
> just have a couple of little things to clear up.
> I am experiencing tearing frames and / or stuttering video in
> recordings from my PVR-250.
> My Default profile is:
> 480x480
> Video:
>         Codec: MPEG-2 Hardware Encoder
>         Stream Stype: MPEG-2 PS
>         Aspect Ratio: 4:3
>         Bit Rate: 3000
>         Max. Bit Rate: 4500
> Audio:
>         Code: MPEG-2 Hardware Encoder
>         Sampling Rate: 32000
>         Layer II
>         Bitrate: 384Kbps
>         Volume: 90%
> 
> I've grokked the archives, but most of what I've found is "Mine doesn't
> work." and the reply being "Mine works fine."
> Do you think increasing the Bit Rates for the video would help?
> (Something I saw in the archive). Would changing the resolution to
> 720x480 help? (Being closer to "native" resolution)
> 
> I've attempted to recompile everything (Qt, LAME, MythTV, etc.) using
> -march=i686 to get a little more
> performance, but haven't been successful, as I get caught up in the
> ELLL (Endless Linux Library Loop).
> 
> Any advice is greatly appreciated.
> 
> Regards,
>    JJ
> 
> KnoppMyth R4V5
> 
> Hardware:
> PVR-250, with latest remote.
> HP Pavilion 6730
>         Celeron (Coppermine) 500MHz
>         256MB RAM
> eVGA.com e-GeFORCE MX 4000
> /dev/hda:
>         Maxtor 6Y060L0
>         60GB
>         DMA on
>         32bit on
>         /dev/hda1       /       ext3
>         /dev/hda2
>         /dev/hda3       /cache  ext2
>         /dev/hda4       /myth   ext3
>         (more detail below)
> 
> /dev/hdd:
>         WDC WD1600JB-00GVA0
>         160GB
>         DMA on
>         32bit on
>         /dev/hdd1       /myth/tv                        reiserfs
>         /dev/hdd2       /var                            reiserfs
>         /dev/hdd3       /myth/backup    reiserfs
>         (more detail below)
> 
> Maxtor:
> /proc/ide/hda/settings
>         name                    value           min             max
>   mode
> ----                    -----           ---             ---
> ----
> acoustic                200             0               254
> rw
> address                 0               0               2
> rw
> bios_cyl                7476            0               65535
> rw
> bios_head               255             0               255
> rw
> bios_sect               63              0               63
> rw
> breada_readahead        8               0               255
> rw
> bswap                   0               0               1
> r
> current_speed           0               0               70
> rw
> failures                0               0               65535
> rw
> file_readahead          124             0               16384
> rw
> init_speed              0               0               70
> rw
> io_32bit                1               0               3
> rw
> keepsettings            0               0               1
> rw
> lun                     0               0               7
> rw
> max_failures            1               0               65535
> rw
> max_kb_per_request      128             1               255
> rw
> multcount               16              0               16
> rw
> nice1                   1               0               1
> rw
> nowerr                  0               0               1
> rw
> number                  0               0               3
> rw
> pio_mode                write-only      0               255
> w
> slow                    0               0               1
> rw
> unmaskirq               0               0               1
> rw
> using_dma               1               0               1
> rw
> wcache                  0               0               1
> rw
> 
> 
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> 
> 
>


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