Thank you
On 3/26/2019 6:37 PM, Richmond via use-livecode wrote:
Looking at "Get Info" for the 2 movie files at the top of the page I
referenced in my earlier message:
http://hubblesource.stsci.edu/sources/video/clips/details/images/centaur_1.mpg
http://hubblesource.stsci.edu/sources/video/clips/details/images/centaur_2.mpg
the two codecs are listed there.
So: the BIG question is where that sort of INFO is stored in a file
and how LiveCode can access it and read it.
What is odd, in LiveCode 9.0.3 at least, is that if those 2 clips are
imported into a stack neither the
Project Browser or the Application Overview will show a Property
Inspector for either clip.
LiveCode 7.1.4 will open a proeprty inspector for both of these clips
but offers no helpful information.
The $60,000 question has to be: can LiveCode read a file's metadata?
Richmonds-Mac-mini:~ richmond$ mdls
/Users/richmond/Desktop/videoFormats/centaur_1.mpg
kMDItemCodecs = (
"MPEG-1 Video"
)
Richmonds-Mac-mini:~ richmond$ mdls
/Users/richmond/Desktop/videoFormats/centaur_2.mpg
kMDItemCodecs = (
"MPEG-2 Video"
)
Richmond.
On 26.03.19 23:28, Paul Dupuis via use-livecode wrote:
Richmond,
I good suggestion. Thank you. However, looking at an identical video
clip encoded as MPEG-1 and as MPEG-2 in a test editor shows lots of
gibberish and no obvious text tags to tell the encoding.
Unfortunately, I don't have time to research byte level binary
encoding differences between MPEG-1 and MPEG-2, which is why I was
hoping some LiveCode media guru had already done this and would share.
It was a good idea to try though.
On 3/26/2019 5:17 PM, Richmond via use-livecode wrote:
I suppose if you open an .mpg file as a TEXT file it should
contain standard markers as to whether it is encoded as MPEG-1 or
MPEG-2.
Useful samples here: http://hubblesource.stsci.edu/sources/video/clips/
Richmond.
On 26.03.19 22:32, Paul Dupuis via use-livecode wrote:
Livecode 9.x.x uses Apple Video Foundation (AVF) for the LC Player
object under OSX.
AVF supports MPEG-1 video but not MPEG-2 video.
Both MPEG-1 and MPEG-2 use the .mpg file extenstion.
Question for any media geniuses on this list: Is there a way in
LiveCode to tell a MPEG-1 .mpg file from a MPEG-2.mpg file?
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