Output video jittery and rendering problems

[lata]

Hi

My Panasonic camcorder records video using these properties.

MPEG Transport-Stream Files
24 bits, 1920 x 1080, 25 fps
Upper Field First
(HDMV-PAL), 16:9
H.264 Video
Video data rate: Variable (Max. 16800 kbps)
Audio data rate: 384 kbps
Dolby Digital Audio, 48 KHz, 3/2(L,C,R,SL,SR)

Those properties are suitable to burn a BD disc, so when I complete my project I render to a new video file using those settings.
Same as Project Settings and Same as First Clip will do that, I also create my own template using Movie Profile Manager which may come in handy.

The Mpeg Optimiser will choose appropriate settings based on my video file, in fact will use the same settings as above, View Details.
It also gives you a visual representation of how the encoder will perform using Smart render.

Just to confirm for Pal users – a Bluray Disc using a 1920 x 1080 frame size has to use 25fps interlaced, and will use Upper Field First, also known as 50i.

Best quality is generally using the original video files properties, that is provided that they are Bluray Compliant.

So the question is what are the properties of your original video file?

Right click a clip and choose properties, what are they?

[Ken Berry]

Just to confirm for Pal users – a Bluray Disc using a 1920 x 1080 frame size has to use 25fps interlaced, and will use Upper Field First, also known as 50i.

That's certainly true, Trevor. However it is not the whole story. A PAL Blu-Ray disc can also use 25p i.e. 25 full/progressive frames per second as well as 25 interlaced frames per second or 50i. In other words, to answer one of Powelly_au's comments, 25p is not the same as 25 fps interlaced or 50i.

A BD can also use the 24p cinematic frame rate.

And as we know, a BD disc can only use 50i and NOT 50p for 1920 x 1080 frame format video. 50p is only permissible if the video is no more than 1280 x 720. Silly and about time the international BD standard was upgraded, but it is what it is...

I just need to know what format in VS 9.5 will produce the best quality BDs. Any suggestions?

As lata has suggested in requesting your video Properties. In essence, you will not be able to improve the quality of your original video by simply changing the format or increasing bitrate etc. So the best quality you will be able to achieve is by using the exact same Properties as your original video has. The only caveat here is that if your original video has Properties which are not consistent with the international BD standard, and particularly if it has 50p video instead of 50i or 25p, then in fact VS will *reduce* the quality of your original video to comply with the international standard.

In other words, to obtain the best quality Blu-Ray disc means that before even filming you have to adjust the filming Properties to meet those of the international Blu-Ray standard. More specifically don't set your camera to record in 50p. Many of us do in fact film using 50p or 60p but that is because we don't intend burning to Blu-Ray discs. Personally, even though I have a Blu-Ray burner and a good supply of BD blanks, I hardly ever burn a BD these days. Instead I simply output a new video from my projects (usually using Same As Project Settings) and then copy that new clip to a USB stick drive or external hard disc and play it from there directly over my HDTV which has no trouble playing 50p video.

[lata]

Hi Ken

I ran some tests a while ago trying to create a Bluray Folder using 1920 x 1080 X 25P but was unable to do so as each attempt caused a Convert Title rendering the file to use interlaced.
Maybe a bug in Video Studio.

But we need the full properties of Powelly_au video to advise on the exact settings to use.

[Powelly_au]

Hi All,
I have done further testing where I set the project properties to "Same as first Clip " and output properties in the 'share tab' to same as project properties however the rendered output video file is still noticeably jittery in the scenes where the video is panning. I have also done extensive testing over the weekend setting the project properties to "same as firs clip" as well as changing the settings to various other HD video properties available for my project and output video file however the output video file always has varying degrees of jittery in the scenes where the video is panning.

I am now using VS X9 ultimate (full version) and also observe the same problem described by videopeter in his post: http://phpbb.ulead.com.tw/EN/viewtopic.php?f=1&t=60260

The video in the time line play back is identical to the source video when played back as a "clip" however it exhibits the same jittery effect when "project" is selected. Is it possible it might be a codec problem or an issue with my I5-4440 Processor as I do not have GPU card.

Regards
Mark

[lata]

Hi Mark
Are you still having issues with Convert Title?
Can you provide the full properties of your video files, right click a clip and select properties, what are they? You can create an image if that window to attach to your post, thanks.
Simular to my reply here
http://forum.corel.com/EN/viewtopic.php ... 96#p331579

Project Playback issues may be improved by using Smart Proxy, have you enabled that and created those proxy files.

Recording HD has one drawback in that panning is a little poor, most cameras will produce bad results when panning unless the pan is very slow.
If the problem is on individual clips then try to use Mercalli, it may help?

[Powelly_au]

Thanks Lata,
I will confirm video properties tonight. I have been concentrating on the jitter problem and not checked the convert title issue, I'll let you know.

The source .MTS video files from my JVC camcorder with the panning when viewed are sharp and clear and exhibit no jitter. The same video when view on the project time line when "clip" is selected is identical, clear with no jitter however when the video is played back with 'project' selected it is jittery. Do you know what might be causing this as I have selected 'same as first clip'.
Regards,
Mark

[lata]

Hi Mark

What you describe for your timeline playback are classic symptoms where Smart Proxy should help.

If you render the video using Same as First Clip those jitters should disappear, and playback smooth when playing the new clip, or using other media players.

I do not understand why you should have problems after rendering.
rendering does not alter the project in the timeline , that will remain the same, the new video file should be as good as originals, played on say VLC Media Player

[Powelly_au]

Hi Lata,
I have reloaded SVX9 tonight (refer posting : http://forum.corel.com/EN/viewtopic.php?f=1&t=60287) and I am very encouraged by tonight's results. The source video properties are:

The video properties of the rendered video when selecting 1920x1080, 50i are :

and the rendering properties are:

The resulting rendered video of my test clip is much clearer and the jitter is essentially gone. I will now render the entire project (45 min) to confirm the results.
Regards,
Mark

[lata]

Hi Mark

Good to hear things are improving.

Just to add, your Project Properties (press Alt+ Enter) should be the same as your first post image, (same as video properties.)

If you choose Share – Same as First Clip, assuming the first clip is indeed your MTS clips, then the same properties will be used for the render, this retains the bit rate at 22599kbps. It may also speed up render a little?

Burning the disc, notice the file name in the rendered file uses m2t. The files properties are Bluray compliant and should burn to disc without any further conversion, that is No Convert Title