[FFmpeg-user] Beaglebone - streaming issue - horizontal lines in output

[Philip Chisholm]

Hi Moritz



I tried the same webcam on a ubuntu laptop (oppose to the beaglebone board).

The cam works fine - for both ffmpeg and just live view using cheese.

No lines.



But when I use it on the BBone board - I get the horizontal lines with ffmpeg.

Not sure how to get a live stream on BB without ffmpeg - since I need line commands (no gui UI interface on BB)

...plus only so much memory on board - and cannot install cheese (board runs out of memory – embedded devices are a killer!).



Hmmm....



When I build FFmpeg I follow this guide…



http://derekmolloy.ie/building-ffmpeg-for-beaglebone-from-source/

an enable these configure options



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git clone git://git.videolan.org/x264.git
cd x264
./configure --enable-shared --prefix=/usr
make
make install


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git clone git://git.videolan.org/ffmpeg.git
./configure --enable-shared --enable-libx264 --enable-gpl --enable-neon
git remote set-url origin git://source.ffmpeg.org/ffmpeg
make
make install



Should I enable anything else if I am pulling Pixel Format: 'YUYV' video out the webcam?

Would that be the problem?





Thanks.



Phil











-----Original Message-----
From: ffmpeg-user <ffmpeg-user-bounces at ffmpeg.org> On Behalf Of Moritz Barsnick
Sent: Tuesday, October 22, 2019 5:10 PM
To: FFmpeg user discussions <ffmpeg-user at ffmpeg.org>
Subject: Re: [FFmpeg-user] Beaglebone - streaming issue - horizontal lines in output



On Tue, Oct 22, 2019 at 18:06:29 +0000, Philip Chisholm wrote:

> The issue is the weird horizontal lines.

> See attached video.

> I am guess some sort of pixel indexing - issue...



Peculiar.



It is still extremely unlikely that it's ffmpeg's fault, unless v4l2 support is extremely broken. But who knows...



Have you tried playing or recording that video device with some other tool, such as luvcview or guvcview, or camorama, or the likes?



Cheers,

Moritz

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