Hi list! I'm trying to use an old laptop with a Celeron 2,6Ghz to playback some videos with a basic GEM chain (pix_film, pix_gain, pix_texture), but the performances are very poor. It's only due to the crappy celeron :-) ? What are the minimum requirements to play a video with GEM? Is there any optimization possible, like using videos encoded with a lighter video codec, or something like this? I'm using Debian with open video drivers (ATI dropped the support for the laptop's video card).
Thanks!
That should defintiely work, I've run it on slower machines. It depends a lot on your graphics card too. As for video playback, if you want to manipulate the video, then you should convert it to a JPEG (aka MJPEG) codec. .mov is a pretty common container format for JPEG videos.
.hc
On Nov 30, 2011, at 11:08 AM, Nicola Pandini wrote:
Hi list! I'm trying to use an old laptop with a Celeron 2,6Ghz to playback some videos with a basic GEM chain (pix_film, pix_gain, pix_texture), but the performances are very poor. It's only due to the crappy celeron :-) ? What are the minimum requirements to play a video with GEM? Is there any optimization possible, like using videos encoded with a lighter video codec, or something like this? I'm using Debian with open video drivers (ATI dropped the support for the laptop's video card).
Thanks!
-- Nicola
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Le 2011-11-30 à 11:13:00, Hans-Christoph Steiner a écrit :
That should defintiely work, I've run it on slower machines. It depends a lot on your graphics card too. As for video playback, if you want to manipulate the video, then you should convert it to a JPEG (aka MJPEG) codec. .mov is a pretty common container format for JPEG videos.
There are three different codecs named JPEG, MJPEG-A and MJPEG-B. They are very similar but not fully interchangeable. So, you can't just say «aka».
| Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC
On Nov 30, 2011, at 12:05 PM, Mathieu Bouchard wrote:
Le 2011-11-30 à 11:13:00, Hans-Christoph Steiner a écrit :
That should defintiely work, I've run it on slower machines. It depends a lot on your graphics card too. As for video playback, if you want to manipulate the video, then you should convert it to a JPEG (aka MJPEG) codec. .mov is a pretty common container format for JPEG videos.
There are three different codecs named JPEG, MJPEG-A and MJPEG-B. They are very similar but not fully interchangeable. So, you can't just say «aka».
I say 'aka' because unfortunately its not that simple. I believe that Apple labeled JPEG in .mov as "Motion JPEG" for a while, and it was just a JPEG codec. But it was not MJPEG. So the whole naming is messed up.
In any case, JPEG is the one that most people want.
.hc
"Free software means you control what your computer does. Non-free software means someone else controls that, and to some extent controls you." - Richard M. Stallman
Motion JPEG is a two field per frame format (like ye olde TV) while Photo JPEG is a single frame progressive format. There is nothing random nor messed up about the naming.
On Wed, Nov 30, 2011 at 9:04 PM, Hans-Christoph Steiner hans@at.or.atwrote:
On Nov 30, 2011, at 12:05 PM, Mathieu Bouchard wrote:
Le 2011-11-30 à 11:13:00, Hans-Christoph Steiner a écrit :
That should defintiely work, I've run it on slower machines. It
depends a lot on your graphics card too. As for video playback, if you want to manipulate the video, then you should convert it to a JPEG (aka MJPEG) codec. .mov is a pretty common container format for JPEG videos.
There are three different codecs named JPEG, MJPEG-A and MJPEG-B. They
are very similar but not fully interchangeable. So, you can't just say «aka».
I say 'aka' because unfortunately its not that simple. I believe that Apple labeled JPEG in .mov as "Motion JPEG" for a while, and it was just a JPEG codec. But it was not MJPEG. So the whole naming is messed up.
In any case, JPEG is the one that most people want.
.hc
"Free software means you control what your computer does. Non-free software means someone else controls that, and to some extent controls you." - Richard M. Stallman
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i used to run GEM on a 450mhz powerbook. Your 2.6Gig machine should run circles around that.
Le 2011-11-30 à 21:04:00, Hans-Christoph Steiner a écrit :
I say 'aka' because unfortunately its not that simple. I believe that Apple labeled JPEG in .mov as "Motion JPEG" for a while, and it was just a JPEG codec. But it was not MJPEG. So the whole naming is messed up.
In Apple's menus, I've always seen «Photo JPEG» mean JPEG, and «Motion JPEG» mean MJPEG. So I don't know what you're talking about. Which versions of OSX did you have a problem with ?
| Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC
Il 30/11/2011 17:08, Nicola Pandini ha scritto:
Hi list! I'm trying to use an old laptop with a Celeron 2,6Ghz to playback some videos with a basic GEM chain (pix_film, pix_gain, pix_texture), but the performances are very poor. It's only due to the crappy celeron :-) ? What are the minimum requirements to play a video with GEM? Is there any optimization possible, like using videos encoded with a lighter video codec, or something like this? I'm using Debian with open video drivers (ATI dropped the support for the laptop's video card).
Thanks!
Thank you for all your advices. Yesterday I tried to playback different codecs and formats. With a mjpeg I had 60-70% of CPU load; Previously I tested a mpeg-2 and the CPU load went to 90%. In both situation the speed of the video playback was slower than normal, even changing the fps of GEM. I tested the patch on another laptop (core2duo with Debian) and the video playback ran smooth with ATI proprietary drivers (fglrx) but it ran slow with open drivers, so I think it's only a video driver problem.
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Charles Goyard -
chris clepper -
Hans-Christoph Steiner -
i go bananas -
Mathieu Bouchard -
Nicola Pandini