How to Split Large Files

[c7386]

I'm editing HDTV recordings (MPEG2 files) and my pc can't handle VS rendering larger files close to 1 GB. Create video file > same as first video clip takes forever and the video turns out with errors (repeating/skipping audio - sounds like a broken record). So I think I need to split large files in half before opening them in VS or at least before rendering. I'm trying to determine if VS will do this or if I need a separate program and if so which one is good to simply split the files without any processing? I tried Clip > Save Trimmed Video. I wonder if smart proxy will help.

[sjj1805]

I'm editing HDTV recordings (MPEG2 files) and my pc can't handle VS rendering larger files close to 1 GB. Create video file > same as first video clip takes forever and the video turns out with errors (repeating/skipping audio - sounds like a broken record). So I think I need to split large files in half before opening them in VS or at least before rendering. I'm trying to determine if VS will do this or if I need a separate program and if so which one is good to simply split the files without any processing? I tried Clip > Save Trimmed Video. I wonder if smart proxy will help.

That's its purpose

[Ron P.]

I'm by far not the expert on HD video. However until one of our "experts" has a chance to reply, I will just add that the Smart Proxy is primarily designed for slower, less endowed PCs to be able to edit the High-Def formats.

I would say, if you have not already tried, do so, Maybe with a short segment to see if it is going to help..

[c7386]

Ok I created a smart proxy file of 228 MB from a 731 MB file. It works great for editing but has no effect on rendering.

[etech6355]

How did you capture the video?
How are you playing in back to test it?
If your computer isn't powerful enough it can't playback HDV without many problems, audio clipping, dropped frames, freeze ups. The will attempt to play it back but usually doesn't play correctly on slower machines.

Your computer specs do not look good enough to capture HDV, especially if your using a laptop which usually have slow 4200rpm drives.
How you captured the video is very important.
Your "Project Settings" and "Preferences" are important.
Did you install both the first Patch#1 and then the HD-Pack? They are necessary for VS11+ to work correctly, could also be part of your problem.
Have you installed Directx 9.0C update dated November 2007.

File Splitting in VS is a piece of cake. But you shouldn't have to use it. Nice feature though. I think there may something else happening.

You also need to post the properties of the HDTV files since they are broadcasted. Sometimes they need to be cleaned up before you can edit them.
PVAStrumento supposedly does this, depends.

[c7386]

These files were captured with a Pinnacle PCTV HD Pro Stick capture card

http://www.pinnaclesys.com/PublicSite/u ... +Stick.htm

I use Media Player Classic for playback and it works fine except on the largest files rendered with errors.

True, my PC barely meets min specs for HDV but the HDD is 7200 RPM so it usually sqeaks by. These HD captures are the most complex video files
I work with, and VS only has trouble rendering large files over about 700 MB (rendering takes forever, VS almost stops responding, and produces video errors). I have already rendered many smaller files recorded from the same broadcasts without errors. So I know it works and I believe the only problem is these files are too large for VS to render on my PC, and I need to split them before processing.

Raw captured video file properties from MPC

Type: Media
Size: 731MB (766591104 bytes)
Media Length: 00:06:56
Video Size: 1920 x 1080
Audio: Dolby AC3 48000Hz 6ch 384Kbps [AC-3]
Video: MPEG2 Video 1920x1080 29.97fps 80000Kbps [Video]

Here are the VS installation steps I followed and I believe everything is installed correctly including the Directx 9.0C update

http://phpbb.ulead.com.tw/EN/viewtopic. ... highlight=

I'm not 100% sure all VS preferences are correct although I followed the VS directions for setting those as best as I could. I haven't really messed with VS project properties yet. Project template properties shows:

NTSC drop frame (29.97 fps)
MPEG files
24 bits, 720 x 480, 29.97 fps
Lower Field First
(DVD-NTSC), 4:3
Video data rate: Variable (Max. 8000 kbps)
LPCM Audio, 48000 Hz, Stereo

[etech6355]

Are you using the trial version of VS11+, if not have you installed the patches and updated DirectX 9.0C?
If not there's no sense in continuing, your HD files are out of spec and you project settings are wrong.

Set your Project Settings To:
NTSC drop frame (29.97 fps)
Compression Tab = MPEG2
Quality = 70%
Video_Bit_Rate = Variable Bit Rate - 18,000kbs
24 bits, 1290 x 1080
16:9 (it's forced)
Mpeg Audio, Stereo @ 384kbs
Field Dominance = Frame_Based (if viewing only on the computer.)
Upper Field First is Normal, you don't show any fielding, I don't know why. It could be because your using the trial version.
If your files don't report any fielding then use Frame_Based.

Actually your files are averaging about 13,000kbs video_bit_rate, encoding them at 18,000 variable bit rate may end up around the same file size as the original. If not then try 16,000kbs

After you properly set your project settings then save the file by doing this process, do not use "Same As first video".
"Share -> Create Video File -> Same As Project Settings" | "Option" (Uncheck Smartrender) then save the file.

You cannot install patches the trial versions.

[2Dogs]

To rule out lack of pc power as a cause, try running task manager in its performance tab whilst playing back a test HDV file, and you should see how much cpu usage there is. It should obviously be less than 100%. In Media Player Classic, you can also enable the jitter and other statistics which could point to a playback problem.

Whilst a 1.6Ghz Pentium M will not be able to play back HD H.264 video, it might squeak by with HD mpeg-2.

I think your reporting of the video data rate at 80000kbps is a misprint - is it actually 18000kbps?

I don't believe your problem is caused by an over large video file. I routinely edit 4.3Gb standard definition mpeg-2 files, and often work with 13Gb DV avi files, all without problems, so long as there is sufficient room on my drives.