"Normal speed" playback is not smooth

videojanitor

New member
Hello folks! I'm a long-time user of VideoReDo, but first-time poster. Since the first version I used many years ago, I've noticed an issue when video is played back in the edit window at normal speed -- it is not smooth. That is, 30fps video looks more like 24fps, or less. With each new version, I hope this will be "fixed," but even with Version 6, I still see this issue. Perhaps this is not an issue at all, but rather just the way it works? Just curious as to whether or not anyone else has every noticed this, and/or if there's a setting that will eliminate it? I've tried changing most of the playback settings, but they had no effect on this. I have gone through several different PCs over the years, with the same result.

The version of VideoReDo I am currently using is 6.60.4.806

Thanks in advance for any hints or tips.
 

jmc

Active member
24fps,30fps... I've never noticed the difference. I did take something down to 15fps once...not good.

Now 60fps is wonderful for smooth panning!...Nice but doubling the file size...not that nice!
 

videojanitor

New member
My description was probably not that great, but your reference to smooth pans is appropriate. Some of the files I edit are 720p/60 -- the motion looks great, but not in the preview window of VideoReDo. There, the motion is quite obviously not being displayed at 60fps.
 

musicvid

Member
List your system specs and MediaInfo readout for your source.
That said, 4k p60 previews smooth as glass in v6 on my modest quad.
 

jgrassi

Member
I had the exact same issue with V6 but not V5. When I compared each option, I found two settings that when changed, eliminated the choppy playback. In Tools / Options / Playback devices, I changed the Video Driver from Direct3D11 to EVR and Deinterlacing from Smart to Simple. Afterwards, my V6 playback became smooth just like V5. Its worth a shot to see if changing these help you as well.
 

videojanitor

New member
Thanks for the suggestions. I tried changing to "EVR" and "Simple" but doesn't seem to have had any effect. My system is certainly modest -- it's an Intel Core 2 Quad 2.4GHz - 8GB RAM - 500 GB SSD - Nvidia GeForce GT710 (2G DDR5). Video playback is buttery smooth with other apps, such as VLC or Telestream Switch.

Here's a MediaInfo report from one of my files, though I experience this issue with EVERY file, even if it's just 480i:

General
Complete name : /Volumes/Media/Media/KTVU/KTVU_ID1_2017.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42/isom)
File size : 11.6 MiB
Duration : 9s 927ms
Overall bit rate : 9 828 Kbps
Encoded date : UTC 2017-12-30 18:26:38
Tagged date : UTC 2017-12-30 18:26:38

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 3 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Format settings, GOP : M=4, N=108
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 9s 927ms
Bit rate : 9 563 Kbps
Maximum bit rate : 13.1 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.173
Stream size : 11.3 MiB (97%)
Title : Telestream, LLC Telestream Media Framework - Local 99.99.999999
Encoded date : UTC 2017-12-30 18:26:38
Tagged date : UTC 2017-12-30 18:26:38
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 3
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 9s 920ms
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 KHz
Frame rate : 46.875 fps (1024 SPF)
Compression mode : Lossy
Stream size : 295 KiB (2%)
Title : Telestream, LLC Telestream Media Framework - Local 99.99.999999
Language : English
Encoded date : UTC 2017-12-30 18:26:38
Tagged date : UTC 2017-12-30 18:26:38

Other
ID : 1
Type : Time code
Format : QuickTime TC
Duration : 9s 927ms
Bit rate mode : Constant
Frame rate : 59.940 (60000/1001) fps
Time code of first frame : 00:00:00:00
Time code, striped : Yes
Title : Telestream, LLC Telestream Media Framework - Local 99.99.999999
Language : English
Default : No
Encoded date : UTC 2017-12-30 18:26:38
Tagged date : UTC 2017-12-30 18:26:38
 

jmc

Active member
There is also the "Use VideoCard YUV Acceleration".
That might have gotten unchecked some how.
 

videojanitor

New member
Thanks for the replies. I've tried checking/unchecking "YUV Acceleration" but it made no difference. This CPU *is* certainly old, but it plays 1080p full-screen with no issues, though only with VLC or other apps. I have a newer laptop with a Core i5, and see the same problem when using VideoReDo on that. Could be this is just something I am over-sensitive to.
 

Danr

Administrator
Staff member
Check the videoredo log file and see if it's outputting messages to the log during playback. Otherwise, there is little different between V5 and V6 when doing playback of AVC files and deinterlacing is set to simple.
 

videojanitor

New member
Thank you sir. I checked the log and didn't see anything unusual. I can post it here if you'd like to see it. In the meantime, below is a link to a very short clip (shot with my phone, off the PC monitor) that will demonstrate what I am seeing. It shows a close view of the ticker on a news channel. It should be scrolling smoothly, but it is rather jerky (in my opinion). Also, I should make it clear that I didn't just start experiencing this with V6 -- I've seen it since the very first version I used, which was at least a decade ago. Would be interested in your opinion of this clip:

 

videojanitor

New member
Alright sir, I will upload the requested file so you can take a look. I will also include an example of playback via VLC, which I think presents a pretty stark contrast. For anyone following this thread and is interested in seeing it, you can download it at the link below. If you compare this to the one I uploaded two posts back, the difference should be clear.

 
Last edited:
Hi. 1st thing I'd like to say great work to the developers and all who have made this program its work of art. Bare with me for this is my first time adding a reply and/or posting an issue similar to the one address by videojanitor. Just wanna make clear that your tvsuite software has been one to give the cleanest cuts I've seen for videos in a while. Glad it was given to me you use. Upon mentioning that, this is not intended to *bomb* or take anything away from your software. I am merely asking for a solution regarding intelligent recode with hopes that you can incorporate a direct stream option which will not try and fix anything other than simply rendering the file with cuts in its original writing library and writing application format. I use staxrip x64 with x264. May be dated but roku media player complies. After just making 1 or 2 cuts, my video outputs studder in roku media player and after looking at its mediainfo, those writing apps and libraries have changed. Shouldn't be a system problem, specs: ASUS x570-E, Ryzen x3900, 32gb ram, etc. Yes, vids play fine on the computer but not in the roku media player, (might wanna give it a try if you have a roku device with its player). Also, was tested with version 5 and even version 6, same results. Doing some reseach, I've noticed your software outputs with the lightworks codec, why so I ask.

Started with:
Writing library : libebml v0.8.0 + libmatroska v0.9.0
Writing frontend : StaxRip v2.0.0.0

Outputs:
Writing application : Lavf54.63.104
Writing library : Lavf54.63.104

I don't think there is a need to provide a source vid, any vid with h.264 or x264 will suffice to use when making a simple cut then testing in the roku media player.

Maybe you can offer a solution other than me having to re-encode your outputs to get unstuddered or jerky video playback results, or doing the cuts prior to recoding a source, for I am one to do 2-pass encoding to compress the vids a little saving a bit of hard drive space.

Note: Not sure if this deserved its own post but found this post was the closest I got to my troubles and what I've been experiencing.

-----update--------------

Apologies for this addition but forgive me, my encoding skills and verbal terms are novice but I will try as best possible to provide any info regarding my issues as best possible. I have been using an old reliable splitter called 'Boilsoft Video Splitter' using the direct stream option and I know MKVToolNix GUI can do the same job give or take the few excess in scenes due to the frame points and placements. (Have yet to figure out how to view and see what I am doing using MKVTN GUI yet). I will say it does result with playable video in the roku media player and theres no change regarding writing apps are libraries. Maybe this is worth mentioning. Thanks for any and all assistance provided.
 
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alfred0809

New member
Hi everyone,
I want to take one single video clip, and halfway through, suddenly goes to slow motion. What FPS should I shoot in, I'm confused. I know you shoot high frame rate to get slow motion, but what if I want some normal speed shots in there too? What's the proper way of doing this to still obtain a cinematic look all throughout? I heard that 24FPS it the standard FPS used in film and TV for a basic cinematic look.
 

Dan203

Senior Developer
Staff member
24fps is used for film. For slow-mo you need to film at a high frame rate and then set the playback framerate to the same 24fps as the standard shots. For example if you record at 240fps and then play at 24fps it will take 10x to play that clip which makes it slow motion.
 
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