h.264 mp4 file doesn't play properly

[Lukas Nader]

Hello guys,

I have an urgent question!

I'm programming a QLab show with a few videos in it. The longest one is about 33 seconds and they all are .mp4 files.

QLab doesn't play it properly, meaning it's shaky. I already tried different formats, lower resolution etc. I can't get it to work.

When I play the file in Quick Time, there's no problem at all, only when playing it in QLab.

I have a show with this QLab project on Wednesday and a rehearsal tomorrow.

So if anyone has any idea how I can solve this problem, please help.

Thanks,

Lukas

[Lukas Nader]

Edit: I'm using a MacBook Pro from 2010 with a 500 GB SSD and 8 GB RAM. I'm aware, that it's quite old.

[micpool]

Whats the video frame rate. What other codecs have you tried?

Mic

[t...@timreidvideodesign.com]

Hi Lukas,

Check that the cues with videos are set to auto load, especially if playback is shaky *at first*

You said you'd tried other formats? Which?

Try ProRes 422 (and/or 422 LT) if you didn't already.

It's also worth making sure all the "helpful" system stuff is turned off so your computer has maximum resources available for QLab - check here (there's even a workspace to automate much of it) 

https://figure53.com/docs/qlab/v3/general/preparing-your-mac/ - for v3

https://figure53.com/docs/qlab/v4/general/preparing-your-mac/ - for v4

Best of luck!

Tim

[Benjamin Farrar]

Lukas,

QLab is finicky with h264 videos. Below is from Figure53 recomedations on video codecs.

V/r
Bennamin

Video cues require a target, which must be a file containing video. While QLab can play files in any format supported by AVFoundation, we recommend the following formats, listed in order of preference, for videos without transparency:

ProRes 422 Proxy
ProRes 422 LT
PhotoJPG
H.264
For videos with transparency, also referred to as alpha channel support, AVFoundation only supports ProRes 4444.

[Sam Kusnetz]

Hi Lukas

QLab 4 also supports Hap and Hap Alpha.

best

Sam

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[Samuel Thériault]

Qlab 4 or 3

I have experienced 2 situations lately that Qlab 3 was not doing good and using Qlab 4 make everything perfect with video. If I'm right the video engine is entirely recoded in V4.

[Lukas Nader]

Problem solved, guys!

Thanks for your help!

Am Mo., 10. Dez. 2018, 12:50 Nachm. hat Lukas Nader <lukas...@gmail.com> geschrieben:

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