Video plugin HD performance issues!

[mrkrabs]

Hi there, I use Cross 2.4 & video Plugin 1.1.1 with timecode control.
When I move the record forward on my turntable everything works fine, even when i move it very slow.
But Scratching or moving backwards causes some issues!

When moving the record backwards, it moves the video back some frames - then shortly stops while the record is still getting moved backwards - then suddenly jumps to the actual position and moves some frames and so on and so on.

When scratching it is often skipping frames.

This happens either with 24fps 720p mp4 youtube videos and 720p 60fps h.264 footage from my dslr.

The audio is NOT affected by this! Its just the video that lags behind.

my system specs:
win 8 pro, 8gb Ram, Core i5 3210m, Nvidia NVS5400m (optimus) , Audio 4 DJ, external 22" full HD Monitor via connected via vga

some updates:
- the issue is independently of the speed at which the record is being moved. moving slowly, normal or fast backwards didnt make any difference

- happens also if no external monitor is connected, internal mixvibes screen shows the same issues

- increasing my audio latency didnt help

- problem is independent of the graphics card, happens with intel onboard and dedicated nvidia

- when recording video, even at 240p, the encoder soon starts to miss frames (a warning pops up), when i hit stop, mixvibes instantly crashes

-when launching mixvibes windows explorer jumps to 30% cpu, i have to manually restart it to get its cpu usage back to normal

-mixvibes' cpu usage doesen't exceed 40% when using hd video

BIG UPDATE
with a 360p video it works just fine! so this seems to be some kind of performance/encoding issue.

recording anyway still misses frames and crashes when hitting "stop"

Any help is appreciated!

[UncleVibes]

A lot of details thanks! More about tomorrow.

[Support@MixVibes]

May be some keyframes are missing ?
Can you see with a video editor/encoder what is the frequency of these keyframes into the actual encoding ?

[mrkrabs]

if this would be related to missing keframes, why does the video play just fine forwards? I also tested it with various videos from different sources in different formats and (except the 360p video) they showed all the same behaviour.

[Support@MixVibes]

if this would be related to missing keframes, why does the video play just fine forwards?

I have video with only one key frame at the beginning that run flawlessy until you try to reverse, jump or pause/play.

They simply read frame after frame, there isn't keyframe to give navigation point.

I also tested it with various videos from different sources in different formats and (except the 360p video) they showed all the same behaviour.

Are you running the integrated GPU or the dedicated one ? (intel or Nvidia)
I don't have this behavior so I need more inputs.

[mrkrabs]

okay, so I got your meaning of keyframe wrong

I have defined Cross as a program that uses the dedicated nvidia gpu via the nvidia system settings. unfortunately i cant switch fully over to the nvidia card via bios.

[Support@MixVibes]

Was thinking that the files higher than 360p might be an issue to record as long as we don't have 64bits handling.

[mrkrabs]

recording audio works fine, but even when i try to record 2 seconds at 240p it crashes. as soon as i hit stop, it makes an attempt to save and crashes.

[Support@MixVibes]

Did you change the recording folder ?

[mrkrabs]

nope