Cache problem: DVB-T MPEG2 play over 802.11G WLAN, Win7 host

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jackm
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Cache problem: DVB-T MPEG2 play over 802.11G WLAN, Win7 host

Postby jackm » 29 May 2009 15:12

VLC 1.0.0 RC1 on Windows Vista SP2 64-bit
File to be played are DVB-T MPEG-2 and AC3 in MPG container, 6Mbit/s bitrate, stream contains little or no corruption
Network: 802.11g wireless network, 15Mbit/s average throughput, throughput very rarely drops 10Mbit/s
File is hosted on Windows 7 32-bit build 7100 network share

When I try to play the afore mentioned files with VLC (with the default cache value of 300ms) they will play for a few seconds before stuttering to a halt (buffer/cache empty). VLC is requesting data at only 4Mbit/s.
If I increase VLC's file cache value by a factor of 10 to 3000ms, the issue goes away. VLC is requesting data at stream bitrate, ie. 6MBit/s.
The media files play perfectly in Windows Media Player.

Messages:

Code: Select all

main warning: output date isn't PTS date, requesting resampling (42266) main warning: buffer is 42433 late, triggering upsampling main warning: PTS is out of range (-9734), dropping buffer main warning: PTS is out of range (-33734), dropping buffer main warning: output date isn't PTS date, requesting resampling (55000) main warning: PTS is out of range (-32734), dropping buffer main warning: computed PTS is out of range (7833), clearing out main warning: PTS is out of range (33266), dropping buffer main warning: output PTS is out of range (52000), clearing out main warning: PTS is out of range (9266), dropping buffer main warning: PTS is out of range (-14734), dropping buffer main warning: PTS is out of range (9266), dropping buffer main warning: PTS is out of range (-14734), dropping buffer main warning: PTS is out of range (-38734), dropping buffer main warning: PTS is out of range (32266), dropping buffer main warning: PTS is out of range (8266), dropping buffer main warning: PTS is out of range (28266), dropping buffer main warning: PTS is out of range (4266), dropping buffer

jackm
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Re: Cache problem: DVB-T MPEG2 play over 802.11G WLAN, Win7 host

Postby jackm » 02 Jun 2009 14:16

Anaemic network access also exists in VLC 1.0.0 RC2.

The DJ
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Re: Cache problem: DVB-T MPEG2 play over 802.11G WLAN, Win7 host

Postby The DJ » 08 Jun 2009 14:12

Now that we no longer have the play/pause delay issue, we should think about raising the default caching times on some of these formats. I will open discussion about this.
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Re: Cache problem: DVB-T MPEG2 play over 802.11G WLAN, Win7 host

Postby The DJ » 08 Jun 2009 17:19

Apparently upping the cache will negatively influence seek and rate changes, so for now they will be at their current values a little while longer.
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