Playing multiple movies at once
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Brian Leitzke
Oct 14, 2015, 10:02:24 PM10/14/15
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Hello all,
Thank you in advance for any help you may be able to provide!
I am creating an experiment where I would like to show 4 videos in a quad-screen format simultaneously. Further, I would like each video to start three seconds after the one prior with all four videos being displayed by 9 seconds in and then all four staying displayed for ~5 minutes. I was thinking that I could have 4 slides with each movie in a quadrant and remaining on after each object ends with subsequent slides and movies appearing with transparent backgrounds so the prior movies show through. This is not working though.
Any suggestions on how to make this work? I was able to make 4 slides with each slide adding an additional movie from the one prior, but this requires playing multiple movies at once and results in some movies freezing as the next ones load.
Thanks again, I'm open to any suggestions and please let me know if this isn't clear and requires further explanation.
BL
MarcL
Oct 15, 2015, 6:24:42 AM10/15/15
to E-Prime
Hi Brian,
I have not worked with Video in E-Prime in the way you intend to do, but here are a few workaround Ideas that I had, before I make room for anyone experienced with this for the elaborate way :-)
First a question to clarify: Are the videos played entirely? Or do they last for 9 seconds, stop with a still image, and then the next movie is presented?
1. Have you tried to work with slide states vs. a new slide? This might change something, I'm not sure.
2. If the answer to the above question is yes: Instead of using a video object, make a picture of the still image at the end, and at presentation of the next video change the video display with an image display object showing that still image.
3. If the answer is no (which I am inclined to think): Why don't you assemble a video, that can be played fullscreen, and does all the presentation. So, in E-Prime you would have a slide that features a fullscreen video object, that plays that one video that will take 5 minutes total and the videos appear 9 seconds apart from each other...you can probably even do that with powerpoint, but I'm not an expert on this at all, because we're mostly working with images.
Another advantage I'd see with method 3 is, that it should control for onset errors with the videos probably...
Regards,
Marc
I have not worked with Video in E-Prime in the way you intend to do, but here are a few workaround Ideas that I had, before I make room for anyone experienced with this for the elaborate way :-)
First a question to clarify: Are the videos played entirely? Or do they last for 9 seconds, stop with a still image, and then the next movie is presented?
1. Have you tried to work with slide states vs. a new slide? This might change something, I'm not sure.
2. If the answer to the above question is yes: Instead of using a video object, make a picture of the still image at the end, and at presentation of the next video change the video display with an image display object showing that still image.
3. If the answer is no (which I am inclined to think): Why don't you assemble a video, that can be played fullscreen, and does all the presentation. So, in E-Prime you would have a slide that features a fullscreen video object, that plays that one video that will take 5 minutes total and the videos appear 9 seconds apart from each other...you can probably even do that with powerpoint, but I'm not an expert on this at all, because we're mostly working with images.
Another advantage I'd see with method 3 is, that it should control for onset errors with the videos probably...
Regards,
Marc
MarcL
Oct 15, 2015, 6:25:50 AM10/15/15
to E-Prime
P.S. Regarding powerpoint: I meant assembling the proposed video of course, not presenting stimuli or testing data...
Brian Leitzke
Oct 15, 2015, 4:21:26 PM10/15/15
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Thank you for the response!
They way this is supposed to play out is kind of like the Brady Bunch intro, but just quadrants. So one video will play in one quadrant and then each quadrant will populate a new video after a few seconds but all prior videos will continue playing seamlessly. I have thought about assembling them all separately but four separate videos in eprime would provide more flexibility. You are right that one video would fix onset problems and I may go that route, but if anybody had ideas on doing this all within eprime, that would be great!
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Vinson, David
Oct 15, 2015, 4:46:35 PM10/15/15
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Dear Brian,
Playing multiple videos in E-Prime was a pet project of mine for some time - though I tried many different video formats I never got it to work successfully with more than one. Crashing, dropping frames, and severe delays were all regular occurrences (even pre-loading videos, accessing each one from different HDs, trying every video format I can manage, varying hardware, e-prime version, and so on and so forth).
I set that project aside and haven't kept trying, but my very strong inclination would be something along the line of Marc's suggestion #3: create a single video file for each trial that contains multiple panels, each one starting at a time you specify. It would require proper video editing software, and may require creating a lot of such files depending on the experimental balance you want to achieve, but the major advantages are that you would then only have to run one video file per trial, and that you would have full control over the timing (at least in the source file).
Otherwise my only advice within E-Prime is to start with two videos, set up a test experiment with a bunch of trials that do nothing but show video 1 and video 2, then see if it runs to completion without crashing and with reasonably low timing error. This makes a simpler "tinkering" environment to see if you can find settings that suit: if so then you can try to scale up. If so please report back to the list as this would be useful information to others who might want to try something similar.
all the best,
DavidV
________________________________________
From: e-p...@googlegroups.com [e-p...@googlegroups.com] on behalf of Brian Leitzke [brianl...@uwalumni.com]
Sent: 15 October 2015 21:20
To: e-p...@googlegroups.com
Subject: Re: Playing multiple movies at once
Thank you for the response!
They way this is supposed to play out is kind of like the Brady Bunch intro, but just quadrants. So one video will play in one quadrant and then each quadrant will populate a new video after a few seconds but all prior videos will continue playing seamlessly. I have thought about assembling them all separately but four separate videos in eprime would provide more flexibility. You are right that one video would fix onset problems and I may go that route, but if anybody had ideas on doing this all within eprime, that would be great!
To post to this group, send email to e-p...@googlegroups.com<mailto:e-p...@googlegroups.com>.
To view this discussion on the web visit https://groups.google.com/d/msgid/e-prime/6f8f602d-b134-4868-90a7-ffce4c68a475%40googlegroups.com<https://groups.google.com/d/msgid/e-prime/6f8f602d-b134-4868-90a7-ffce4c68a475%40googlegroups.com?utm_medium=email&utm_source=footer>.
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Playing multiple videos in E-Prime was a pet project of mine for some time - though I tried many different video formats I never got it to work successfully with more than one. Crashing, dropping frames, and severe delays were all regular occurrences (even pre-loading videos, accessing each one from different HDs, trying every video format I can manage, varying hardware, e-prime version, and so on and so forth).
I set that project aside and haven't kept trying, but my very strong inclination would be something along the line of Marc's suggestion #3: create a single video file for each trial that contains multiple panels, each one starting at a time you specify. It would require proper video editing software, and may require creating a lot of such files depending on the experimental balance you want to achieve, but the major advantages are that you would then only have to run one video file per trial, and that you would have full control over the timing (at least in the source file).
Otherwise my only advice within E-Prime is to start with two videos, set up a test experiment with a bunch of trials that do nothing but show video 1 and video 2, then see if it runs to completion without crashing and with reasonably low timing error. This makes a simpler "tinkering" environment to see if you can find settings that suit: if so then you can try to scale up. If so please report back to the list as this would be useful information to others who might want to try something similar.
all the best,
DavidV
________________________________________
From: e-p...@googlegroups.com [e-p...@googlegroups.com] on behalf of Brian Leitzke [brianl...@uwalumni.com]
Sent: 15 October 2015 21:20
To: e-p...@googlegroups.com
Subject: Re: Playing multiple movies at once
Thank you for the response!
They way this is supposed to play out is kind of like the Brady Bunch intro, but just quadrants. So one video will play in one quadrant and then each quadrant will populate a new video after a few seconds but all prior videos will continue playing seamlessly. I have thought about assembling them all separately but four separate videos in eprime would provide more flexibility. You are right that one video would fix onset problems and I may go that route, but if anybody had ideas on doing this all within eprime, that would be great!
On Thu, Oct 15, 2015 at 5:24 AM, MarcL <marcl...@gmail.com<mailto:marcl...@gmail.com>> wrote:
Hi Brian,
I have not worked with Video in E-Prime in the way you intend to do, but here are a few workaround Ideas that I had, before I make room for anyone experienced with this for the elaborate way :-)
First a question to clarify: Are the videos played entirely? Or do they last for 9 seconds, stop with a still image, and then the next movie is presented?
1. Have you tried to work with slide states vs. a new slide? This might change something, I'm not sure.
2. If the answer to the above question is yes: Instead of using a video object, make a picture of the still image at the end, and at presentation of the next video change the video display with an image display object showing that still image.
3. If the answer is no (which I am inclined to think): Why don't you assemble a video, that can be played fullscreen, and does all the presentation. So, in E-Prime you would have a slide that features a fullscreen video object, that plays that one video that will take 5 minutes total and the videos appear 9 seconds apart from each other...you can probably even do that with powerpoint, but I'm not an expert on this at all, because we're mostly working with images.
Another advantage I'd see with method 3 is, that it should control for onset errors with the videos probably...
Regards,
Marc
On Thursday, October 15, 2015 at 4:02:24 AM UTC+2, Brian Leitzke wrote:
Hello all,
Thank you in advance for any help you may be able to provide!
I am creating an experiment where I would like to show 4 videos in a quad-screen format simultaneously. Further, I would like each video to start three seconds after the one prior with all four videos being displayed by 9 seconds in and then all four staying displayed for ~5 minutes. I was thinking that I could have 4 slides with each movie in a quadrant and remaining on after each object ends with subsequent slides and movies appearing with transparent backgrounds so the prior movies show through. This is not working though.
Any suggestions on how to make this work? I was able to make 4 slides with each slide adding an additional movie from the one prior, but this requires playing multiple movies at once and results in some movies freezing as the next ones load.
Thanks again, I'm open to any suggestions and please let me know if this isn't clear and requires further explanation.
BL
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Hi Brian,
I have not worked with Video in E-Prime in the way you intend to do, but here are a few workaround Ideas that I had, before I make room for anyone experienced with this for the elaborate way :-)
First a question to clarify: Are the videos played entirely? Or do they last for 9 seconds, stop with a still image, and then the next movie is presented?
1. Have you tried to work with slide states vs. a new slide? This might change something, I'm not sure.
2. If the answer to the above question is yes: Instead of using a video object, make a picture of the still image at the end, and at presentation of the next video change the video display with an image display object showing that still image.
3. If the answer is no (which I am inclined to think): Why don't you assemble a video, that can be played fullscreen, and does all the presentation. So, in E-Prime you would have a slide that features a fullscreen video object, that plays that one video that will take 5 minutes total and the videos appear 9 seconds apart from each other...you can probably even do that with powerpoint, but I'm not an expert on this at all, because we're mostly working with images.
Another advantage I'd see with method 3 is, that it should control for onset errors with the videos probably...
Regards,
Marc
On Thursday, October 15, 2015 at 4:02:24 AM UTC+2, Brian Leitzke wrote:
Hello all,
Thank you in advance for any help you may be able to provide!
I am creating an experiment where I would like to show 4 videos in a quad-screen format simultaneously. Further, I would like each video to start three seconds after the one prior with all four videos being displayed by 9 seconds in and then all four staying displayed for ~5 minutes. I was thinking that I could have 4 slides with each movie in a quadrant and remaining on after each object ends with subsequent slides and movies appearing with transparent backgrounds so the prior movies show through. This is not working though.
Any suggestions on how to make this work? I was able to make 4 slides with each slide adding an additional movie from the one prior, but this requires playing multiple movies at once and results in some movies freezing as the next ones load.
Thanks again, I'm open to any suggestions and please let me know if this isn't clear and requires further explanation.
BL
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Brian Leitzke
Oct 16, 2015, 6:35:35 PM10/16/15
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Thank you David for the response!
I tried building a mini-experiment as a proof-of-concept and it failed. I tried making 2 slides, one with a video in the upper left corner set to not stop after the object ends, and the second with a video in the upper right corner and with a transparent background. When the second video began, the first video would vanish. I tried this with a text box and an image on the second slide instead of a video and found that the first video bled through perfectly and played alongside the image in the second slide. Unfortunately, it seems that Eprime cannot handle playing two videos in this manner. The only way I can make this work is to build it one video at a time with the first slide playing one video, the second slide playing two videos with the first beginning where it left off in the previous slide, and so on until I have all four videos playing at the same time on the fourth slide. The only down side thus far is there is a brief pause every time a new slide loads (prerelease or not). I'll go with this for now but may just assemble the videos in a separate software and play it that way...it all depends on my tolerance for the pauses in the videos!
Thanks for the help and if anyone has any other suggestions, I'm sure there are some others out there who would be interested!
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