Video thumbnails not working

virbing

New member
Just downloaded the newest beta. When editing the start of my clips (in black), the thumbnail shows an extra frame before the first frame out of black. When I click on that frame, the timeline moves forward in time. Here, the starting frame is at 01:58.24, but if I click on the image in the thumbnails before that starting frame, the timeline jumps to 1:59.29 - ahead instead of backwards.VRD early frame.jpgVRD start.jpg

See attached pics.
 

Infidelus

Member
Not sure if it's 100% the same but I'm seeing a lot of missing frames in the thumbnails with this beta. Is this related to the mentioned changes:

Code:
[Change] MPEG2 thumbnails: Speed up display of thumbnails by NOT writing all temporary AC3 frame errors to the log file.
[Change] MPEG2 thumbnails: Speed up display of thumbnails by decoding fewer frames.
Looking at the thumbnails, VRD is is showing a thumbnail from a different frame in multiple places which makes it really difficult to visually work out where the cuts should be.

vrd_thumbnails.png
 
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Danr

Administrator
Staff member
1. What codec is your source video (Tools>Show Program Info). In fact, just post the whole Tools>Show Program Info here.

2. What is the frame cache setting on the Tools>Options>H264/HEVC page. Try setting it to 0 frames and see if that makes a difference.
 

jmc

Active member
1. What codec is your source video (Tools>Show Program Info). In fact, just post the whole Tools>Show Program Info here.

2. What is the frame cache setting on the Tools>Options>H264/HEVC page. Try setting it to 0 frames and see if that makes a difference.
H264/HEVC frame buffer set to 0 does nothing to this. But then my X264 & HEVCs do not have this problem.

Standard dvd mpg.mpgs do have this mismatch video/display problem with the thumbnails grouped together oddly.
All of 4 tested.
Sometimes I can not go backward with the frame by frame mouse wheel. The video twitches but does not move backwards.



Size0.068 GB
Duration00:01:00.13
Mux typePS - MPEG2


Video:
EncodingMPEG2VideoStreamIDxE0
Frame rate29.97 fpsEncoding size720 x 480
Aspect ratio16:9Header bit rate9.800 Mbps
VBV buffer224 KBytesProfileMain@Main
ProgressiveProg or IntChroma4:2:0
Bit rate8.305 MbpsCaptioningNone found
Field orderProgressive


Audio Stream: 1 (Primary)
CodecAC3FormatDVD VOB
Channels5.1Sub stream idx80
Bit rate448 KbpsSampling rate48000
Sample size16 bits
 

Infidelus

Member
Hi Dan,

Recordings are in .ts and (for the last day or 2) .mkv format:

Code:
 File:                                     Name : D:\Recordings\The 100 S06E13 - The Blood of Sanctum - 2019-11-28 00-05.ts
                                           Size : 0.651 GB
                                       Duration : 00:40:36.11
                                       Mux type : TS Stream
                                    TS mux rate : 0.866 Mbps
 Video:                                Encoding : MPEG2
                                  VideoStreamID : x515
                                     Frame rate : 25.00 fps
                                  Encoding size : 720 x 576
                                   Aspect ratio : 16:9
                                Header bit rate : 15.000 Mbps
                                     VBV buffer : 224 KBytes
                                        Profile : Main@Main
                                    Progressive : Prog or Int
                                         Chroma : 4:2:0
                                       Bit rate : 1.807 Mbps
                                    Field order : Progressive
 Audio Stream: 1 (Primary)                Codec : MPEG
                                      MPEGLayer : Layer 2
                                       Channels : 2.0
                                       Language : eng
                                            PID : x516
                                  PES Stream Id : xC0
                                       Bit rate : 192 Kbps
                                  Sampling rate : 48000
                                    Sample size : 16 bits
 Audio Stream: 2                          Codec : MPEG
                                      MPEGLayer : Layer 2
                                       Channels : 1.0
                                       Language : eng
                                            PID : x517
                                  PES Stream Id : xC0
                                       Bit rate : 64 Kbps
                                  Sampling rate : 48000
                                    Sample size : 16 bits
 Subtitle: 1-1                             Type : DVB Subpic
                                            PID : 0x533
                                       Language : eng
                                           Page : 2
Code:
 File:                                     Name : D:\Recordings\Mock the Week S18E10 -  - 2019-11-29 22-00.mkv
                                           Size : 0.713 GB
                                       Duration : 00:30:48.24
                                       Mux type : MKV
 Video:                                Encoding : MPEG2
                                  VideoStreamID : x201
                                     Frame rate : 25.00 fps
                                  Encoding size : 704 x 576
                                   Aspect ratio : 16:9
                                Header bit rate : 15.000 Mbps
                                     VBV buffer : 224 KBytes
                                        Profile : Main@Main
                                    Progressive : Prog or Int
                                         Chroma : 4:2:0
                                       Bit rate : 2.716 Mbps
                                    Field order : Top field first
 Audio Stream: 1 (Primary)                Codec : MPEG
                                      MPEGLayer : Layer 2
                                       Channels : 2.0
                                       Language : eng
                                            PID : x202
                                  PES Stream Id : xC0
                                       Bit rate : 256 Kbps
                                  Sampling rate : 48000
                                    Sample size : 16 bits
 Subtitle: 1-1                             Type : DVB Subpic
                                            PID : 0x203
                                       Language : eng
                                           Page : 1
Changing the Maximum Frames to 0 does look like it fixes the thumbnails from a very quick test, but these are on files I've already edited once in case that makes a difference.
 

jmc

Active member
What thumbnail interval are you using?
Hmm, 0 is set to 0 for single frame as I have always had frame by frame movement set.

I know I have not changed anything here (thumbnails) in VRD6 and the settings are the same as in my VRD5Pro.
VRD6-810a groups the thumbnails together with normal dvd.mpg files (808 has no grouping) and VRD5Pro does not group.

EDIT...
"[Change] MPEG2 thumbnails: Speed up display of thumbnails by decoding fewer frames."

Any way to turn this off maybe?
 
Last edited:

jmc

Active member
jmc, after you set the frame cache to 0, did you restart V6?
(W7/64)
Hmm, No, I just reloaded the file. Restarting did help somewhat...

I don't see repeating I Frames of mixed up segments at first load. Once I click around things start to go a bit funny.
I may see mixed Frames or it may take 10 sec to respond to my click.

The very first I Frame segment is 20 frames and I've never been able to see them.

My single frame mouse wheel goes from the single I Frame at the start to the next displayed thumbnail frame,
an I Frame(frame 21) then it actually starts to move from frame to frame 22,23 etc.

thanks.
 

virbing

New member
Hi. I a using the Nvdia codec. Here is Program Info,
File: Name : F:\Room 104\Room 104 S03E12 20191129 [20191130-0700].mpg
Size : 1.964 GB
Duration : 00:37:05.08
Mux type : TS Stream
TS mux rate : 7.868 Mbps
Video: Encoding : MPEG2
VideoStreamID : x1A41
Frame rate : 29.97 fps
Encoding size : 1920 x 1080
Display dimensions : 1920 x 1080
Aspect ratio : 16:9
Header bit rate : 80.000 Mbps
VBV buffer : 1194 KBytes
Profile : Main@High
Progressive : Prog or Int
Chroma : 4:2:0
Bit rate : 6.319 Mbps
Captioning : EIA 608/708
Field order : Top field first
Audio Stream: 1 (Primary) Codec : AC3
Format : AC3 stream
Channels : 5.1
Language : eng
PID : x1A42
PES Stream Id : xBD
Bit rate : 384 Kbps
Sampling rate : 48000
Sample size : 16 bits
Audio Stream: 2 Codec : AC3
Format : AC3 stream

Setting cache to 0 makes no difference.

fwiw, in the timeline along the bottom you can see that the frames jump ahead for a frame every once in a while. ie., above ...1:58.20, 1:58.21, 1:59.29, 1:58.23 ...
Channels : 2.0
Language : spa
PID : x1A43
PES Stream Id : xBD
Bit rate : 96 Kbps
Sampling rate : 48000
Sample size : 16 bits
 

jmc

Active member
jmc, do you want to upload the file to me?
Yeah, I'll try to get that uploaded today. Boy, 3 hours sleep is no fun at all.

EDIT...
File uploaded and Email sent. (not that Emails can be trusted at all)
 
Last edited:

jmc

Active member
But it is their primary support route and it's how Dan first got to know about this thread :)
Yeah, ya gotta use Emails but I've had some personal and business issues where
I sent them and when I finally get on the phone they said they did not get them.

But then ya wonder...did they or not. Unpleasant.
 

Infidelus

Member
OK, so I thought that changing the Maximum Frames setting to 0 and restarting had fixed the thumbnail problem, but I've just recorded something today and it's definitely not right. If I use the mouse to click in the frame that looks like the first frame I want, the thumnail preview seems to move about a dozen frames in. If i then use the left cursor to move back through the frames, the first frame I want is actually about the 7th frame! Making the cuts at the odd looking places does seem to output the correct file, but I'm even more confused now, though in all fairness that doesn't take much these days :)
 

jgrassi

Member
I fully agree. I just started recoding my new shows and the thumbnails are all messed up on all my videos as well. Cannot make it better no matter what I try.
 

Danr

Administrator
Staff member
The cache had issues with MPEG2 files so this version auto disables it for mpeg2 but leaves it as set for h264 and hevc.

There's still a weird MPEG2 issue I found today, where if you do an I-frame seek and then hit right arrow it jumps to the next GOP rather than the next frame. Not yet sure why, but we will find it.
 
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