[FFmpeg-devel] [PATCH 2/2] lavc/mediacodec: bypass width/height restrictions when looking for a decoder
matthieu.bouron at gmail.com
Mon Jun 6 09:54:07 CEST 2016
On Tue, May 31, 2016 at 05:41:16PM +0200, Matthieu Bouron wrote:
> On Tue, May 31, 2016 at 03:51:20PM +0200, Matthieu Bouron wrote:
> > On Tue, May 31, 2016 at 03:35:49PM +0200, Hendrik Leppkes wrote:
> > > On Tue, May 31, 2016 at 3:00 PM, Matthieu Bouron
> > > <matthieu.bouron at gmail.com> wrote:
> > > > From: Matthieu Bouron <matthieu.bouron at stupeflix.com>
> > > >
> > > > Codec width/height restrictions seem hardcoded at the OMX level and
> > > > seem arbitrary. Bypassing those restrictions allows a device to decode
> > > > streams at higher resolutions.
> > > >
> > > > For example it allows a Nexus 5 to decode h264 streams with a resolution
> > > > higher than 1920x1080.
> > >
> > >
> > > What happens if the resolution actually exceeds the devices capabilities?
> > The patch has been tested on various devices and it has been working so
> > far. When the resolution actually exceeds the device capabilities the
> > codec just fails to configure itself.
> > However I did not try to craft samples with really high resolutions (higher
> > than ~4K) to test the patch against.
> > I will double check what is happening with both SW output and surface
> > output.
> I tested on a bunch of devices with different chipsets and they all fail at
> the configuration step.
If there is no objection, I will push the patchset in one day.
More information about the ffmpeg-devel