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I am working with ffmpeg.
I made some thumbnails with ffmpeg command like below.
ffmpeg -ss 600 -i input.mp4 -s 420x270 -f mjpeg vframes 1 output.jpeg
but it is just plane photo.
What I need is some thumbnail like youtube thumbnail which has time positions
on picture.
If you have any challenging ideas, please let me try.
Thanks.
I tried the same, I can tell you this won't work I spend many hours ob implementing that. You need to get the length of the video and take several screenshots e.g. all 3 seconds. Than you can build a stripe and show a small part of the image as the preview.
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In my project I need to get text from an image. Actually I want to get information(text) from a business card. I need to implement OCR in my project.I've used an open source library Tesseract But its not accurate. Please tell me about any good library which could be useful.
I think OpenCV is enough for you task. Official manual: http://docs.opencv.org/
Other examples: github
And working example using opencv and Tesseract together iPhone-OCR
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I'm making a video player for iOS Devices. I use a ffmpeg libraries to play the video files. I see the problems that have other video players in the App Store with the AC3 sound support.
I want that my video player don't works with AC3 sound. I'm looking for arguments in the compile script ffmpeg libraries like a --enable-gpl and --enable-nonfree, but not works.
I read the licenses of ffmpeg libraries several times and I think that I don't understand well.
Can someone explain how to do this?
Just add --disable-decoder=ac3 to ffmeg configure arguments.
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I need to extract some informations abour a ts file containing h264 video.
I want to know where the I frames are.
I can't find somethong on the net which explain the ts h264 structure. So if someone have a link ...
I have already done it with a stream containing a mpeg2 video (I found this page : http://dvd.sourceforge.net/dvdinfo/mpeghdrs.html)
Thank you for your help.
A question really for superuser.com.
If you want just location of I pictures and some other details use ffprobe [comes with ffmpeg]
ffprobe -show_frames inputfile
will give details of picture type, size etc.
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one thing that annoys me on youtube is that it always starts playing the video automatically after opening the video page.
is there a way how to prevent it? i don't see such option in profile settings.
There plenty of greasemonkey scripts available to do this exact thing (search for 'autoplay'). Also, this belongs on Super User.
You can install the flashblock firefox extention. That will prevent anything flash from starting automatically. This works perfectly on youtube, and as a bonus it will get rid of a huge amount of annoying ads with blinking text or whatnot.
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Just by messing around a little it seems that the video stream is not ascii. i tested by downloading the stream. It would be insane if it was. Theres so many videos. So that couldnt be it. Youtube seems to not work with javascript disable (not counting mobile if true).
How is it being done? is it javascript magic? is the SWF running the video through a filter in realtime? (I doubt its a native filter so how is the filter compiled) its really cool. I cant imagine how this is running realtime yet it is!
MPlayer uses AALib for this type of effect. YouTube have probably ported it to ActionScript.