Re: Extract frame from wmv
Tim Golden wrote: Martin wrote: Lawrence D'Oliveiro wrote: In message <[EMAIL PROTECTED]>, Tim Golden wrote: Alternatively, you might be able to commandline control mencoder or ffmpeg itself to do this. Not sure, but there must be *something* among those millions of command-line options! FFmpeg--yes! Unfortunately it looks like I have the same problem as I do with pyglet - it's not support by my host. It looks like I might have to process the files locally and then upload them. Painful. Unless anyone else has any suggestions? Well, since as far as I can see your host won't let you install anything which isn't there already, you're down to implementing a Python-only module to read a frame from a .wmv. Which is, I would suggest, a not inconsiderable task. Perhaps pre-filtering is the best solution after all. TJG Thanks Lawrence and Tim, The irony is that I already have a Python only solution - it just requires 2.5! I've actually worked out a way to extract and compress just the thumbnails from my local server and upload them without having to re-upload the video files (which took days) so I'm happy. Thanks for the suggestions, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Extract frame from wmv
Martin wrote: Lawrence D'Oliveiro wrote: In message <[EMAIL PROTECTED]>, Tim Golden wrote: Alternatively, you might be able to commandline control mencoder or ffmpeg itself to do this. Not sure, but there must be *something* among those millions of command-line options! FFmpeg--yes! Unfortunately it looks like I have the same problem as I do with pyglet - it's not support by my host. It looks like I might have to process the files locally and then upload them. Painful. Unless anyone else has any suggestions? Well, since as far as I can see your host won't let you install anything which isn't there already, you're down to implementing a Python-only module to read a frame from a .wmv. Which is, I would suggest, a not inconsiderable task. Perhaps pre-filtering is the best solution after all. TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: Extract frame from wmv
Lawrence D'Oliveiro wrote: In message <[EMAIL PROTECTED]>, Tim Golden wrote: Alternatively, you might be able to commandline control mencoder or ffmpeg itself to do this. Not sure, but there must be *something* among those millions of command-line options! FFmpeg--yes! Unfortunately it looks like I have the same problem as I do with pyglet - it's not support by my host. It looks like I might have to process the files locally and then upload them. Painful. Unless anyone else has any suggestions? Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Extract frame from wmv
In message <[EMAIL PROTECTED]>, Tim Golden wrote: > Alternatively, you might be able to commandline control > mencoder or ffmpeg itself to do this. Not sure, but there > must be *something* among those millions of command-line > options! FFmpeg--yes! -- http://mail.python.org/mailman/listinfo/python-list
Re: Extract frame from wmv
Tim Golden wrote: Martin wrote: I've looked at Pymedia but I have to admit I couldn't work it out. Commandline might be good, but I'm really hoping someone can point me in the right direction, as this is not my area of expertise. Nor mine :) Just so people can help you out, can you be more precise in your requirement? Do you want just the first frame (eg to act as an img placeholder for an embedded video). Or do you want to extract one or more arbitrary frames, eg for screen cap purposes? This page: http://stream0.org/2008/02/howto-extract-images-from-a-vi.html looks helpful from the ffmpeg pov, but I assume you're as capable of using Google as I am. I had a very quick go with the copy of pymedia I have installed here, but it couldn't read a (fairly recent) .wmv file so that might be a problem in any case. UPDATE: Just tried: ffmpeg -i bacardi.wmv -r 1 -f image2 images%05d.png from that page and it produced useful stuff. Worth a try? TJG Thanks again Tim, I'm just extracting the first frame to use as a thumbnail. I will try ffmpeg. Thanks for pointer. I didn't really know where to start looking. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Extract frame from wmv
Martin wrote: I've looked at Pymedia but I have to admit I couldn't work it out. Commandline might be good, but I'm really hoping someone can point me in the right direction, as this is not my area of expertise. Nor mine :) Just so people can help you out, can you be more precise in your requirement? Do you want just the first frame (eg to act as an img placeholder for an embedded video). Or do you want to extract one or more arbitrary frames, eg for screen cap purposes? This page: http://stream0.org/2008/02/howto-extract-images-from-a-vi.html looks helpful from the ffmpeg pov, but I assume you're as capable of using Google as I am. I had a very quick go with the copy of pymedia I have installed here, but it couldn't read a (fairly recent) .wmv file so that might be a problem in any case. UPDATE: Just tried: ffmpeg -i bacardi.wmv -r 1 -f image2 images%05d.png from that page and it produced useful stuff. Worth a try? TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: Extract frame from wmv
Tim Golden wrote: Martin wrote: I need to extract a frame from a wmv file and save it as a jpg. In fact I need to extract a frame from each one of a collection of several thousand wmv files, but that's beside the point. I've actually written a script that does exactly this using the pyglet module. But while it works fine on my local machine running Python 2.5, my host is only on 2.4.3. They've installed pyglet for me, but it won't run without ctype, and they don't suport it. Can anyone suggest an alternative way to achieve this using a module that will run on a standard 2.4.3 installation? Pretty sure pymedia can do this kind of thing, possibly with a bit of work. http://pymedia.org/tut/src/dump_video.py.html I used it recentlyish to do the reverse: combine a series of still shots into a time-lapse movie. Alternatively, you might be able to commandline control mencoder or ffmpeg itself to do this. Not sure, but there must be *something* among those millions of command-line options! TJG Hi Tim, I've looked at Pymedia but I have to admit I couldn't work it out. Commandline might be good, but I'm really hoping someone can point me in the right direction, as this is not my area of expertise. Thanks, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Extract frame from wmv
Martin wrote: I need to extract a frame from a wmv file and save it as a jpg. In fact I need to extract a frame from each one of a collection of several thousand wmv files, but that's beside the point. I've actually written a script that does exactly this using the pyglet module. But while it works fine on my local machine running Python 2.5, my host is only on 2.4.3. They've installed pyglet for me, but it won't run without ctype, and they don't suport it. Can anyone suggest an alternative way to achieve this using a module that will run on a standard 2.4.3 installation? Pretty sure pymedia can do this kind of thing, possibly with a bit of work. http://pymedia.org/tut/src/dump_video.py.html I used it recentlyish to do the reverse: combine a series of still shots into a time-lapse movie. Alternatively, you might be able to commandline control mencoder or ffmpeg itself to do this. Not sure, but there must be *something* among those millions of command-line options! TJG -- http://mail.python.org/mailman/listinfo/python-list
Extract frame from wmv
Hi, I need to extract a frame from a wmv file and save it as a jpg. In fact I need to extract a frame from each one of a collection of several thousand wmv files, but that's beside the point. I've actually written a script that does exactly this using the pyglet module. But while it works fine on my local machine running Python 2.5, my host is only on 2.4.3. They've installed pyglet for me, but it won't run without ctype, and they don't suport it. Can anyone suggest an alternative way to achieve this using a module that will run on a standard 2.4.3 installation? Thanks, Martin -- http://mail.python.org/mailman/listinfo/python-list
