[Libav-user] FFmpeg scaling problem

Ryan Grewatz grewa008 at d.umn.edu
Fri Jun 20 18:19:48 CEST 2014

Never mind! There was an issue with the tutorial code!

Source of answer:

On Fri, Jun 20, 2014 at 10:44 AM, Ryan Grewatz <grewa008 at d.umn.edu> wrote:

> Hello all,
> I'm fairly new to using ffmpeg. Currently I'm trying to use ffmpeg within
> an Android application of mine to view a live rtsp stream with h264 endoded
> video. I've been using code from an ffmpeg and Android NDK tutorial (link
> below) to help me understand how to use it with Android. Everything has
> been working out great, until I started trying to scale the output. When I
> try to scale at a ratio other than 1:1 (no scaling), I get a garbled up
> stream. I decided to run the tutorial to see if it was my code that was
> wrong, but I still ended up with the same mess. So I'm kind of lost as to
> how to fix this. Has anybody else had problems like this or know what I
> could be doing wrong?
> Here's the tutorial:
> https://github.com/roman10/android-ffmpeg-tutorial/tree/master/android-ffmpeg-tutorial02
> Native code (uses the ffmpeg library):
> https://github.com/roman10/android-ffmpeg-tutorial/blob/master/android-ffmpeg-tutorial02/jni/tutorial02.c
> Screenshot of my stream with no scaling:
> https://www.dropbox.com/s/s1e509yfmisfv7g/Screenshot_2014-06-20-09-42-42.png
> Screenshot of my stream scaled up:
> https://www.dropbox.com/s/e8h9039nw3sxaz2/Screenshot_2014-06-20-09-45-00.png
> Screenshot of my stream scaled down:
> https://www.dropbox.com/s/yyjyuw3n7y1qaan/Screenshot_2014-06-20-10-09-48.png
> Thank You!
> Ryan G
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