I confess I'm a a video newbie here and guess what the question is about...

Videos upload OK when they are less than say 15MB

Here is http://www.videocentricity.net/phpinfo.php

shows

PHP Core Local Value /Master Value

Directive Local Value Master Value
allow_call_time_pass_reference On On
allow_url_fopen On On
always_populate_raw_post_data Off Off
arg_separator.input & &
arg_separator.output & &
asp_tags Off Off
auto_append_file no value no value
auto_prepend_file no value no value
browscap no value no value
default_charset no value no value
default_mimetype text/html text/html
define_syslog_variables Off Off
disable_classes no value no value
disable_functions no value no value
display_errors Off On
display_startup_errors Off Off
doc_root no value no value
docref_ext no value no value
docref_root no value no value
enable_dl On On
error_append_string no value no value
error_log error_log error_log
error_prepend_string no value no value
error_reporting E_COMPILE_ERROR|E_ERROR|E_CORE_ERROR 2039
expose_php On On
extension_dir /usr/local/lib/php/extensions/no-debug-non-zts-20020429/ /usr/local/lib/php/extensions/no-debug-non-zts-20020429/
file_uploads On On
gpc_order GPC GPC
highlight.bg #FFFFFF #FFFFFF
highlight.comment #FF8000 #FF8000
highlight.default #0000BB #0000BB
highlight.html #000000 #000000
highlight.keyword #007700 #007700
highlight.string #DD0000 #DD0000
html_errors On On
ignore_repeated_errors Off Off
ignore_repeated_source Off Off
ignore_user_abort Off Off
implicit_flush Off Off
include_path .:/usr/local/lib/php .:/usr/local/lib/php
log_errors On On
log_errors_max_len 1024 1024
magic_quotes_gpc On On
magic_quotes_runtime Off Off
magic_quotes_sybase Off Off
max_execution_time 78000 11000
max_input_time 64000 11000
open_basedir /home/videocen:/usr/lib/php:/usr/local/lib/php:/tmp no value
output_buffering On no value
output_handler no value no value
post_max_size 300M 300M
precision 12 12
register_argc_argv On On
register_globals Off On
report_memleaks On On
safe_mode Off Off
safe_mode_exec_dir no value no value
safe_mode_gid Off Off
safe_mode_include_dir no value no value
sendmail_from no value no value
sendmail_path /usr/sbin/sendmail -t -i /usr/sbin/sendmail -t -i
serialize_precision 100 100
short_open_tag On On
SMTP localhost localhost
smtp_port 25 25
sql.safe_mode Off Off
track_errors Off Off
unserialize_callback_func no value no value
upload_max_filesize 300M 200M
upload_tmp_dir no value no value
user_dir no value no value
variables_order EGPCS EGPCS
xmlrpc_error_number 0 0
xmlrpc_errors Off Off
y2k_compliance On On

Site is hosted by ImageLeet

Videos upload OK when they are less than say 15MB

When filesize is greater, the file does end up in the uploads folder but after about 5 minutes the browser goes to an error page.

Running debug.php with value from debug.txt does get the flv created, though I see these errors in the debug trail below..

MEncoder 1.0rc1-3.4.6 (C) 2000-2006 MPlayer Team CPU: Dual-Core AMD Opteron(tm)
Processor 2212 (Family: 15, Model: 65, Stepping: 2) CPUflags: Type: 15 MMX: 1
MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions:
MMX MMX2 3DNow 3DNowEx SSE SSE2 success: format: 0 data: 0x0 - 0xee0427 ASF file
format detected. VIDEO: [WMV3] 320x240 24bpp 30.000 fps 0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:6 fourcc:0x33564D57 size:320x240 fps:30.00 ftime:=0.0333
================================================== ========================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders AUDIO: 44100
Hz, 2 ch, s16le, 64.0 kbit/4.54% (ratio: 8005->176400) Selected audio codec:
[ffwmav2] afm: ffmpeg (DivX audio v2 (FFmpeg))
================================================== ======================== OK,
exit Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1, osd: 1,
aspect: 0.000000, round: 1
================================================== ========================
Opening video decoder: [dmo] DMO video codecs Creating new registry Failed to
open registry file '/root/.mplayer/registry' for writing. DMO dll supports VO
Optimizations 0 1 DMO dll might use previous sample when requested Failed to
open registry file '/root/.mplayer/registry' for writing. Failed to open
registry file '/root/.mplayer/registry' for writing. Failed to open registry
file '/root/.mplayer/registry' for writing. GetOutput r=0x0 size:230400 align:1
StreamCount r=0x0 1 1 Decoder supports the following formats: YV12 YUY2 UYVY
YVYU RGB8 RGB555 RGB565 RGB24 RGB32 Decoder is capable of YUV output (flags
0x1b) VDec: vo config request - 320 x 240 (preferred colorspace: Packed YUY2)
VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is undefined - no
prescaling applied. videocodec: libavcodec (320x240 fourcc=766c66 [flv])
[VE_LAVC] High quality encoding selected (non-realtime)! Selected video codec:
[wmv9dmo] vfm: dmo (Windows Media Video 9 DMO)
================================================== ======================== VIDEO
CODEC ID: 0 AUDIO CODEC ID: 15001, TAG: 0 Writing header... Pos: 0.0s 1f ( 0%)
0.00fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.1s 2f ( 0%) 0.00fps Trem: 0min 0mb
A-V:0.003 [0:0] Pos: 0.1s 3f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.007 [0:0] Pos:
0.1s 4f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.010 [0:0] Pos: 0.2s 5f ( 0%) 0.00fps
Trem: 0min 0mb A-V:0.013 [0:0] Pos: 0.2s 6f ( 0%) 0.00fps Trem: 0min 0mb
A-V:0.017 [0:0] Pos: 0.2s 7f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.020 [0:0] Pos:
0.3s 8f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.023 [0:0] Pos: 0.3s 9f ( 0%) 0.00fps
............
100.73fps Trem: 0min 8mb A-V:0.037 [346:54] Pos: 183.6s 5527f (100%) 100.74fps
Trem: 0min 8mb A-V:0.041 [345:54] Pos: 183.7s 5528f (100%) 100.75fps Trem: 0min
8mb A-V:0.044 [345:54] Pos: 183.7s 5529f (100%) 100.76fps Trem: 0min 8mb
A-V:0.047 [345:54] Flushing video frames Writing index... Video stream: 345.824
kbit/s (43227 B/s) size: 7940981 bytes 183.700 secs 5529 frames Audio stream:
54.078 kbit/s (6759 B/s) size: 1236422 bytes 182.909 secs Failed to open
registry file '/root/.mplayer/registry' for writing. Failed to open registry
file '/root/.mplayer/registry' for writing.


Last line of the output: Failed to open registry file '/root/.mplayer/registry'
for writing.

Return value: 0

So while it makes the flv is that registry error the problem?

or. Whats wrong with the php.ini - it looks OK