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lessthanoptimal / BoofAndroidDemo

Demonstration of BoofCV for Android devices
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Import videos from Android internal/sd memory #18

Open jackaru opened 4 years ago

jackaru commented 4 years ago

Hi, sorry for the question but I can't figure it out what I'm doing wrong, It's 2 days that I'm looking for examples and trying to import a .mp4 video from sd card path but each time the file can't be found. The path is checked without errors, is it possible to import external videos or I made a big mistake?

Here's the code, but as I said, openVideo returns null, so I can't get the frame number

image

lessthanoptimal commented 4 years ago

Hate to break the bad news but you're trying to use a method designed for Desktop only use on Android. I'll see if I can figure out some way to make it fail in such a way that you know what's going on! What i think is happening is that it can't find a codec to open the file so it returns null.

It's been a few years since I've tried to process video on Android. There's a way you can do it with FFMPEG but there might be better ways to do it now.

On Thu, Apr 30, 2020 at 2:36 PM jackaru notifications@github.com wrote:

Hi, sorry for the question but I can't figure it out what I'm doing wrong, It's 2 days that I'm looking for examples and trying to import a .mp4 video from sd card path but each time the file can't be found. The path is checked without errors, is it possible to import external videos or I made a big mistake?

Here's the code, but as I said, openVideo returns null, so I can't get the frame number

[image: image] https://user-images.githubusercontent.com/21238513/80761429-d704c700-8b3a-11ea-9ab8-b066e42fb2ab.png

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lessthanoptimal commented 4 years ago

So I was just looking at the FFMPEG used in BoofCV. There's actually a chance you could do a special build and get it to work. You can specify which native architectures you wish to support using a command line argument. native_arch what that will do is attempt to download precompiled libraries from bytedeco.javacpp-presets which has builds of the library for Android. I've never tested though...