VideoStudio 11+ Audio/Video Synch Test

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sjj1805
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VideoStudio 11+ Audio/Video Synch Test

Post by sjj1805 »

VideoStudio 11+ Audio/Video Synchronisation Bench Test

No matter how many new transitions, DVD menu templates, Video tracks or other items are supplied, one of the biggest tests and of considerable concern to forum members is how good or bad VideoStudio 11+ will be when it comes to editing MPEG2 files.

I begin writing this test making no assumptions and before I have tried editing any MPEG2 files with the software. I am going to record my actions in as much detail as I can and use a source file - which again I shall document in as much detail as possible, which I consider will be worthy of conducting this test.

The source file I am going to use was recorded using WinTV2000 - the native software for my Hauppauge PVR 350 PCI TV card. I have used this method of recording my TV programs for a few years now and so know that it produces a good quality MPEG2 file. We now need to remove the adverts and also the padding that I apply to the start and end of the broadcast to ensure that I don't miss the start or end of the program due to the broadcast being slightly time shifted to that advertised in the TV listings.

I am also going to produce 2 versions of my edited program to give VideoStudio a sporting chance.

The first video will only contain straight cuts.
The second video will include cross fade transitions.
Hopefully both videos will remain in synch at the end of the project.

The source material is going to be one long video file containing 3 x 1 hour TV episodes. I am going to extract the last episode - so we will be starting 2 hours into the recording. the episodes all contain adverts of approx 5 minutes duration every 10 minutes - i.e. the episode will contain 3 advert breaks. (approx 10-5-10-5-10-5-10 = 55 minutes plus a bit at the start and end)

The settings used with winTV2000 to record this one long video are as follows:

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These are the factory default settings for "DVD long Play" for WinTV2000 and which I have used extensively in the past.

The size of my recorded video file is shown in Windows Explorer as 7,587,708 KB

I Have then opened VideoStudio 11+ in 4.3 mode (as that is the ratio of my recording)

I have then created a separate library in the library manager and imported that video file. Here is the Video Property Sheet.

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When I drag my imported video down onto the timeline I am going to accept the offer to Change my project settings to match the video's properties so that VideoStudio can perform Smart Render.

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Now I am going to use multi trim to extract that 3rd episode minus the adverts.

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I will now save my project so that I can now produce the first video file without transitions and then use this same project to produce a second video file with transitions.

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As I am working with PAL video and wish to create a video file that I can later turn into a DVD Video I am going to select the option same as project settings (the settings I have are DVD compliant)

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My AMD Athlon 2400 XP+ computer with 1GB RAM and Windows XP Pro SP2 took just under 5 minutes to render the new video file.

Next I inserted 1 second cross fade transitions between the clips.

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and rendered another video file using the same settings as previously.
This render took slightly over 6 minutes.

Now I opened the first video file using PowerDVD and checked the start and end of the video. The sound was in perfect synchronisation.
Video 1 = PASS

Now I opened the second video file (with the transitions) with PowerDVD and again played the start and end of the video
The sound was in perfect synchronisation.
Video 2 = PASS

The quality of the Video itself was also superb in both of the rendered video files.
roy wood
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Post by roy wood »

Hi Steve, have you conducted the same test useing VS10+?
sjj1805
Posts: 14383
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operating_system: Windows XP Pro
System_Drive: C
32bit or 64bit: 32 Bit
motherboard: Equium P200-178
processor: Intel Pentium Dual-Core Processor T2080
ram: 2 GB
Video Card: Intel 945 Express
sound_card: Intel GMA 950
Hard_Drive_Capacity: 1160 GB
Location: Birmingham UK

Post by sjj1805 »

No, due to audio/video synch problems with an earlier version, not sure if it was 8 or 9 I stuck to Womble for editing MPEG files - a purpose built MPEG Editor.

I thought I would conduct this test as I knew it is a popular question on the forum. If I get chance I shall repeat the test with VS10+
(Unless someone else has time to beat me to it)
etech6355
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Location: US

Post by etech6355 »

Steve,
Using my PVR150 in those setup screens I use GOPS=6 and Mpeg Audio=224kbs
I don't know why, ulead products seem to like 224kbs for mpeg audio.
Using these settings I've had less audio sync problems.

For Mpeg Editing Purposes:
I usually don't have audio sync problems with software encoded video like the Older ATI Video Recorder capture cards.
I seem to have more problems with the hardware based capture cards.
Sektionschef
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Joined: Thu Mar 16, 2006 7:24 am
Location: Vienna, Austria

reply

Post by Sektionschef »

Steve, Many Thanks for doing this test!!!
Would you please CAREFULLY check whether you can see any distortions(artefacts) or frame jumps in the video?
With VS10+ and smartrender turned on I often(but not always) notices such problems either at the beginning or at the end of the transitions or at the cut.
To verify this I use freeware virtualdub-mpeg2. With VD I can easily step through each single frame(IBorP) to verify the transitions.
This is the thread where I have originally posted my problem in detail:
http://phpbb.ulead.com.tw/EN/viewtopic. ... highlight=
For me it would be important to know whether this problem is solved in VS11+
Regards
Sektionschef
Kaledi
Posts: 48
Joined: Mon Mar 14, 2005 8:32 pm

Post by Kaledi »

Sektionschef, I too have a great issue with VS and its rendering of transitions. Indeed, this has been a problem all the way back to VS7 (the first one I used).
I'm hoping this new 'smarter' encoding facility allows 2-pass encoding over the transitions?
To confirm, the 'jitters' are usually apparent when using a transition between 2 MPEG2 sections of the same bit rate etc and SMART encoding is enabled.
Sektionschef
Posts: 161
Joined: Thu Mar 16, 2006 7:24 am
Location: Vienna, Austria

Post by Sektionschef »

Kaledi wrote:Sektionschef, I too have a great issue with VS and its rendering of transitions. Indeed, this has been a problem all the way back to VS7 (the first one I used).
I'm hoping this new 'smarter' encoding facility allows 2-pass encoding over the transitions?
To confirm, the 'jitters' are usually apparent when using a transition between 2 MPEG2 sections of the same bit rate etc and SMART encoding is enabled.
Hi Kaledi
Have you read this thread
http://phpbb.ulead.com.tw/EN/viewtopic. ... highlight=
It describes my problem in detail.
And yes, the jitters immediately disappear if you disable smartrendering so the problem defenitely comes from the smartrenderer.
I already found a workaround by moving the transitions to the next I-frame(see thread) but this workaround is very time-consuming.
What is your mpeg2 source material which shows the problem?
Mine is from a Panasonic camcorder SDR-S100 that creates mpeg2 files with ~6Mbps sample rate VBR(max. sample rate is 9,558Mbps),res.704X576 at 25fps,audio is 256k CBR mpeg2 48kHz.
Regards
Sektionschef
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