Between this and IRC I've got the image capture working. Still have to
write the captured image back into Plone, but I think I have that
under control. Thanks for all the help,
Brayton
Here is the code I used (for future Googlers):
context = aq_inner(file)
movie_data = context.get_data()
movie_id, movie_name = tempfile.mkstemp('.mov',text=False)
image_id, image_name = tempfile.mkstemp('jpg', text=False)
output_id, output_name = tempfile.mkstemp()
wfile = open(movie_name, 'wb')
wfile.write(movie_data)
wfile.close()
args = "ffmpeg -i %s -ss 1 -an -vframes 1 -f image2 %s" %
(movie_name, image_name)
p = sub.Popen(args, shell=True, stdin=sub.PIPE, stdout=output_name,
stderr=sub.STDOUT)
On Sep 23, 2009, at 1:38 AM, Jean-Michel FRANCOIS wrote:
Tom Gross a écrit :
Hi Brayton,
p4a-video uses the File-content-type, which again uses OFS.File as
content-class. If you want to access the raw-data use:
atfileobject.getFile().data
or
str(atfileobject.getFile())
If you need a file-like object, you have to do:
stream = StringIO(str(atfileobject.getFile()))
HTH
-Tom
Brayton Osgood wrote:
I'm trying to extend P4A Video to automatically generate the file
images
that can be added to each video via the edit panel of any
IVideoEnhanced
content. Ideally, the result will be an adapter (I think) that
responds
to the IVideoEnhanced interface.
Right now I'm running into trouble capturing an image from a video
file
once it's stored in Plone. I've tried calling ffmpeg as a
subprocess,
but I get an I/O error (see below):
image = subprocess.Popen('ffmpeg -i moviefile -ss 1 -an -
vframes 1
-f image2 thumb%2d.jpg', shell=True, stdin=subprocess.PIPE,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT, close_fds=True)
print image.stdout.read()
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice
Bellard, et
al.
configuration: --enable-gpl --enable-pp --enable-swscaler
--enable-pthreads --enable-libvorbis --enable-libtheora --enable-
libogg
-- enable-libgsm --enable-dc1394 --disable-debug --enable-shared
--prefix=/usr
libavutil version: 1d.49.3.0
libavcodec version: 1d.51.38.0
libavformat version: 1d.51.10.0
built on Mar 16 2009 21:19:49, gcc: 4.2.4 (Ubuntu 4.2.4-1ubuntu3)
moviefile: I/O error occured
Usually that means that input file is truncated and/or corrupted.
I've tried doing this where 'moviefile' is an <ATFile at
/Plone/Members/brayt/jumping2.mov> object, a <p4a.video
_ATCTFileVideo>
object (applying the IVideo interface to the ATFile), and even the
binary data (passed by moviefile.getData()). Each case gives me
the same
error.
I suspect this is because ffmpeg expects to receive certain file
types,
and Plone files are somehow wrapped so they aren't recognized. I
guess
my question may boil down to how do I access (and do something
useful
with) the data in a file that's not normally read by Plone? I
suspect
that the indexing of PDFs behaves similarly to what I'm hoping to
do,
but I haven't quite figured out how that works.
Any help would be greatly appreciated!
Thanks much,
Brayton
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To call it with subprocess :
- use mkstemp python module to create a temp file
- write the raw data inside it
- do the subprocess on that new tempfile
- don't forget to delete the temp file
- write the image inside your image field.
--
Cordialement,
Jean-Michel FRANCOIS
Makina-Corpus
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