rendered video stuttering - backward and forward, not skipping

ryan-constantine wrote on 11/23/2017, 2:49 PM

I've looked around the forum for similar questions. They weren't quite the same. Most had to do with bit rate.

What I'm seeing is a stuttering back and forth of any movement. In this case, walking and dancing. The camera was still. The movements aren't that rapid. It's a school play.

I have the latest version of VPX as of today. I run an i7-4770K, 32 GB RAM, iso is being burned to a solid state drive although the work (temp files) is being done on a std 7200 rpm 6Gbps SATA drive, GTX1080 graphics card, Win 7 Pro 64 bit.

I'm using the MainConcept codec since my source material is 1920x1080x24p and the default MP4 codec didn't seem to have that option. I'm pretty sure my settings are all the same as my kids' last play, and my recordings are definitely the same.

I can't enable hardware acceleration or I get a rendering error (5). I therefore have software selected. Bit rate is 18000-20000 bits per second depending on whether I chose to do a BD disc or AVCHD. AVCHD is what I burned and I'm presently trying BD.

What further information would you guys need to help me figure this out? Or maybe the BD will work where the AVCHD didn't? I could burn just the first few minutes and post the iso somewhere if that would help.

By the way, even the intro credits, which are a simple slide show with title and music were screwed up. How could it be simpler?

As I write this, I realize I have the button checked for 'render effects with hardware' or something like that. I'll try unchecking. Off to eat turkey now, though.

Comments

johnebaker wrote on 11/23/2017, 5:12 PM

We need more information:

Windows version and is it up to date? Press and hold down the Windows key and the R key - in the dialog that opens type in winver and press enter.
Software full name and version number - as found under Help, About . . .
A MediaInfo analysis of one of the source files used in the project and the exported file that judders - copy and paste the results here from the Text view in MediaInfo
Make and model of camera used for recording.

Also please read this post before replying and add any other information you think may be relevant.

. . . . MainConcept codec since my source material is 1920x1080x24p and the default MP4 codec . . . .

Use the Default codec - the MC codec does not work with Hardware Acceleration and the option for 24 fps is there if you click the check box arrowed in the image below (for some curious reason the 24fps is actually marked as 23.976 !!)

. . . . What I'm seeing is a stuttering back and forth of any movement. In this case, walking and dancing. . . . .

I suspect that this is a common issue that occurs when converting interlaced video to progressive and / or changing the framerate of the exported video

John EB

ryan-constantine wrote on 11/23/2017, 9:50 PM

Firefox died as I was finishing a lengthy reply. 😭

I appreciate the help. I saw that post you linked to and thought I did my best, but I appreciate the additional pointers - particularly the Mediainfo app. I did check the Help and Manual PDF and searched the forum. It seemed most people had more a skipping problem whereas mine is a back and forth stuttering.

I didn't see that checkbox, so thanks for the screenshot! The render I started earlier isn't finished so I'll check it out when I can.

To answer your bullet points:

Windows 7 Ultimate, 6.1 Build 7601 Service Pack 1 - That's the latest, right?
Video Pro X (15.0.5.195)
See below for source and temp file (m2ts) used to make the ISO. I have a comment below which may be my issue!
Nikon D750 but recording on Blackmagic Video Assist as ProRes. Source and destination should both be 1920x1080x24p (23.976) - maybe I should to 59.whatever next time?

Source (just the first actual video file of two, which on the timeline comes after several stills which I use to animate the intro credits):

General
Complete name                            : X:\Videos\Mulan\Show 3\Capture0000.mov
Format                                   : QuickTime
Format/Info                              : Original Apple specifications
File size                                : 30.2 GiB
Duration                                 : 36 min 4 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 120 Mb/s
Encoded date                             : UTC 2016-12-04 03:03:06
Tagged date                              : UTC 2016-12-04 03:03:06
Writing library                          : Apple QuickTime

Video
ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : 422
Codec ID                                 : apcn
Duration                                 : 36 min 4 s
Bit rate mode                            : Variable
Bit rate                                 : 117 Mb/s
Width                                    : 1 920 pixels
Clean aperture width                     : 1 888 pixels
Height                                   : 1 080 pixels
Clean aperture height                    : 1 062 pixels
Display aspect ratio                     : 16:9
Clean aperture display aspect ratio      : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 2.356
Stream size                              : 29.5 GiB (98%)
Writing library                          : bmd0
Language                                 : English
Encoded date                             : UTC 2016-12-04 03:03:06
Tagged date                              : UTC 2016-12-04 03:03:06
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
matrix_coefficients_Original             : BT.709

Audio
ID                                       : 2
Format                                   : PCM
Format settings                          : Little / Signed
Codec ID                                 : in24
Duration                                 : 36 min 4 s
Bit rate mode                            : Constant
Bit rate                                 : 2 304 kb/s
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 kHz
Bit depth                                : 24 bits
Stream size                              : 594 MiB (2%)
Language                                 : English
Encoded date                             : UTC 2016-12-04 03:03:06
Tagged date                              : UTC 2016-12-04 03:03:06

Rendered:

General
ID                                       : 0 (0x0)
Complete name                            : Y:\Documents\MAGIX\Video Pro X\Disc Images\AVCHD Image Mulan\BDMV\STREAM\00000.m2ts
Format                                   : BDAV
Format/Info                              : Blu-ray Video
File size                                : 10.2 GiB
Duration                                 : 1 h 16 min
Overall bit rate mode                    : Variable
Overall bit rate                         : 19.0 Mb/s
Maximum Overall bit rate                 : 48.0 Mb/s

Video
ID                                       : 4113 (0x1011)
Menu ID                                  : 1 (0x1)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, RefFrames               : 2 frames
Format settings, GOP                     : M=2, N=18
Codec ID                                 : 27
Duration                                 : 1 h 16 min
Bit rate mode                            : Variable
Bit rate                                 : 18.0 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 23.976 (24000/1001) FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.362
Stream size                              : 9.62 GiB (94%)
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Codec ID                                 : 129
Duration                                 : 1 h 16 min
Bit rate mode                            : Constant
Bit rate                                 : 384 kb/s
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Bit depth                                : 16 bits
Compression mode                         : Lossy
Delay relative to video                  : -84 ms
Stream size                              : 211 MiB (2%)
Service kind                             : Complete Main

Issue? I see the result is PAL even though I selected NTSC. Perhaps what I'm seeing is the attempt to play a PAL format on NTSC equipment? I swear that switched to PAL like 3 times and I switched it back to NTSC each time!!!

Anyway, if you're willing to teach me to fish rather than hand me fish, that would be great. I know it's better to solve our own problems if we can.

Thanks again.

ryan-constantine wrote on 11/24/2017, 1:37 AM

The new render finished and what do you know? It's NTSC like the first one was supposed to and it's just fine:

General
ID                                       : 0 (0x0)
Complete name                            : Y:\Documents\MAGIX\Video Pro X\Disc Images\BD H264 Image Mulan\BDMV\STREAM\00000.m2ts
Format                                   : BDAV
Format/Info                              : Blu-ray Video
File size                                : 11.4 GiB
Duration                                 : 1 h 16 min
Overall bit rate mode                    : Variable
Overall bit rate                         : 21.2 Mb/s
Maximum Overall bit rate                 : 48.0 Mb/s

Video
ID                                       : 4113 (0x1011)
Menu ID                                  : 1 (0x1)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, RefFrames               : 4 frames
Format settings, GOP                     : M=2, N=25
Codec ID                                 : 27
Duration                                 : 1 h 16 min
Bit rate mode                            : Variable
Bit rate                                 : 20.0 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 23.976 (24000/1001) FPS
Standard                                 : NTSC
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan type, store method                  : Separated fields
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 0.402
Stream size                              : 10.7 GiB (94%)
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Codec ID                                 : 129
Duration                                 : 1 h 16 min
Bit rate mode                            : Constant
Bit rate                                 : 384 kb/s
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Bit depth                                : 16 bits
Compression mode                         : Lossy
Stream size                              : 211 MiB (2%)
Service kind                             : Complete Main

Sorry to bother you! Thanks for the tip on MediaInfo!

ryan-constantine wrote on 11/24/2017, 2:27 AM

One last comment: The screenshot with the 'Show all' checkbox. I figured out that it's in the Export Movie->Video as MP4 dialog box. I had been using the Burn option, which doesn't have that box. I assume the Burn option restricts the possibilities to those compatible with Blu-ray discs. Is that the case or not? Would it be better to Export Movie first then pull the output into a BD iso?

johnebaker wrote on 11/24/2017, 4:13 AM

. . . . Issue? I see the result is PAL even though I selected NTSC. Perhaps what I'm seeing is the attempt to play a PAL format on NTSC equipment? . . . . It's NTSC like the first one was supposed to and it's just fine . . .

I think you have nailed it. Although you can play PAL video on NTSC devices, and vice versa, there are some differences that create issues, eg image is Black/White, stuttering can occur due to different framerate standard, de-interlacing artifacts appearing.

. . . . I figured out that it's in the Export Movie->Video as MP4 dialog box . . . .

Apologies - I misread your initial post - I read it as you were exporting to MP4 and burning to disc.

. . . . I assume the Burn option restricts the possibilities to those compatible with Blu-ray discs . . . .

That is correct - they are restricted to the BD disc standard requirements, whereas the export formats are optimised for the particular target application.

. . . . . Would it be better to Export Movie first then pull the output into a BD iso? . . . . .

No - the video must meet the required format specified by the BD standard.

. . . . . teach me to fish rather than hand me fish, that would be great. I know it's better to solve our own problems if we can . . . . .

Agreed, that is a way of teaching/learning that achieves the best outcome (IMHO).

HTH

John EB