xine a/v sync issues

[Costa Tsaousis]

For anyone interested, this is how I got "almost perfect" a/v sync with
xine.

By the end you will find a bash script. It creates a custom xine config
(will not overwrite yours) and start fbxine with the movie you supplied
in the command line.
Also, it can drive any number dxr3 cards (just change the card= line to
the card ID to use), and it can support alsa and oss for audio.

The key config options that made enough difference for me are:

audio.synchronization.av_sync_method:resample
audio.synchronization.force_rate:48000
audio.synchronization.resample_mode:on

The above enable resampling of audio. Resampling seems to make xine a
lot more accurate.

dxr3.encoding.alt_play_mode:0
dxr3.sync_every_frame:1

The above seem to allow xine to maintain a/v sync.

I still have some a/v issues, but:

1. they are at most 200 ms
2. they mostly appear at the beginning of a few movies
3. they disappear after 15-30 mins of playback

There is still one major issue with xine and dxr3. Subtitles (tested
.srt and .sub files) are displayed with wrong timing.

Here it is:

---

#!/bin/bash

card=1          # select the card: 1, 2, 3, etc
audio=oss      # select audio: alsa oss

cat >$HOME/.xine/config.card$card <<EOF

video.driver:dxr3
audio.driver:$audio

# If you use alsa
# you have to set alsa_id=EM8300-$card to em8300 kernel module options
audio.device.alsa_default_device:default:EM8300-$card
audio.device.alsa_front_device:default:EM8300-$card

# if you use oss
audio.device.oss_device_name:/dev/dsp
audio.device.oss_device_number:$card
audio.device.oss_mixer_number:$card
audio.oss_sync_method:getodelay

audio.synchronization.av_sync_method:resample
audio.synchronization.force_rate:48000
audio.synchronization.resample_mode:on

dxr3.device_number:$[card - 1]
dxr3.encoding.add_bars:0
dxr3.encoding.alt_play_mode:0
dxr3.sync_every_frame:1
dxr3.correct_durations:0
dxr3.preferred_tvmode:pal
dxr3.videoout_mode:widescreen tv

EOF

export LC_ALL=en_US
export XINERC="$HOME/.xine/config.card$card"
fbxine -A $audio -V dxr3 "${@}"

---



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[Costa Tsaousis]

Costa Tsaousis wrote:
> There is still one major issue with xine and dxr3. Subtitles (tested
> .srt and .sub files) are displayed with wrong timing.
>  
Just for completeness, I just tested xine on plain X11 output (no dxr3),
and it seems to have the same problem. External subtitles appear with
wrong timing, while other major players (vlc, mplayer) show the
subtitles correctly. So, this should not be considered a dxr3 related
problem.

Regards,

Costa


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[Clendon Gibson-2]

Some parts of this message have been removed. Learn more about Nabble's security policy.

After a lot of reading and tinkering I finally got Xine to play a movie on my TV via the S Video line on my Hollywood plus card.

The problem is that I see the left half (roughly) of the image. This is true of the XINE logo that appears on the TV as well.

Part of the reason I am posting is that I am tired and am going to ask y'all before I pack it in for the night.

This is a debian box.

Anybody know what would cause this?

(Sound is fine.)

Details
uname -a
Linux skynet 2.6.26-2-686 #1 SMP Thu May 28 15:39:35 UTC 2009 i686 GNU/Linux

Machine is an 800 MHz PIII.

Card is using the ADV7175A chipset.

lspci -vvv
00:0d.0 Multimedia controller: Sigma Designs, Inc. REALmagic Hollywood Plus DVD Decoder (rev 01)
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 64
    Interrupt: pin A routed to IRQ 11
    Region 0: Memory at f4000000 (32-bit, non-prefetchable) [size=1M]
    Kernel driver in use: Sigma Designs EM8300

relevant dmesg
[  673.435408] em8300-0: EM8300 8300 (rev 1) <6>bus: 0, devfn: 104, irq: 11, <6>memory: 0xf4000000.
[  673.435521] em8300-0: mapped-memory at 0xd8d00000
[  673.435758] em8300-0: using MTRR
[  673.442933] em8300-0: unable to identify model...
[  673.442956] em8300-0: Chip revision: 1
[  734.904398] adv717x.o: ADV7175A chip detected
[  749.189432] firmware: requesting em8300.bin
[  751.842427] em8300-0: Microcode version 0x29 loaded
[  752.097063] em8300-0: Analog audio enabled
[  752.120663] em8300-0: Analog audio enabled
[  753.074986] em8300-0: adjusting scr: 175476

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[Nicolas Boullis]

Hi,

On Wed, Jun 24, 2009 at 11:58:29PM -0700, Clendon Gibson wrote:

> After a lot of reading and tinkering I finally got Xine to play a
> movie on my TV via the S Video line on my Hollywood plus card.
>
> The problem is that I see the left half (roughly) of the image. This
> is true of the XINE logo that appears on the TV as well.
>
> Part of the reason I am posting is that I am tired and am going to ask
> y'all before I pack it in for the night.
>
> This is a debian box.
>
> Anybody know what would cause this?

Your log shows:

> [  673.442933] em8300-0: unable to identify model...

This means that there was some problem identifying your card, so it was
unable to set the right parameters.

Since you say your card is an Hollywood+ (rather than a DXR3), you
should try to load the em8300 module with either "card_model=3" or
"card_model=4" option. If neither works, then you'll have to play with
the various em8300 and adv717x options...

Anyway, it'd be interesting to understand why your card was not
identified propery. When you have a working configuration, it would be
nice to send your /sys/class/em8300/em8300-0/device/model file (with the
form filled).


Cheers,

Nicolas

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