#raspberrypi #ffmpeg

#raspberrypi #ffmpeg

[Ed Watson]

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Hello,

I am trying to get v4l_mem2mem in to ffmpeg. It does hardware h264 encoding on a RPI4

ffmpeg  -encoders | grep h264

for example

ffmpeg -f v4l2  - i /dev/video0 -v:c v4l_mem2mem out.mp4

would take the a webcam output and encode it in h264 using the hardware encoder.

On raspberry pi os:

V..... libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)

V..... libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)

V..... h264_omx             OpenMAX IL H.264 video encoder (codec h264)

V..... h264_v4l2m2m         V4L2 mem2mem H.264 encoder wrapper (codec h264)

V..... h264_vaapi           H.264/AVC (VAAPI) (codec h264)

On yocto so far this is what I have managed so far ....

V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)

V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)

I am working from this:

https://git.yoctoproject.org/poky/tree/meta/recipes-multimedia/ffmpeg/ffmpeg_5.1.2.bb?h=langdale

Anyone else go anywhere close?

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Re: [yocto] #raspberrypi #ffmpeg

[Ross Burton]

On 4 May 2023, at 11:40, Ed Watson via lists.yoctoproject.org <edmundwatson=gmail.com@lists.yoctoproject.org> wrote:
> 
> Hello, 
> 
> I am trying to get v4l_mem2mem in to ffmpeg. It does hardware h264 encoding on a RPI4
> ffmpeg  -encoders | grep h264
>  
> for example
>  ffmpeg -f v4l2  -i /dev/video0 -v:c v4l_mem2mem out.mp4
> 
> would take the a webcam output and encode it in h264 using the hardware encoder. 
>  On raspberry pi os:
>  V..... libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
>  V..... libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
>  V..... h264_omx             OpenMAX IL H.264 video encoder (codec h264)
>  V..... h264_v4l2m2m         V4L2 mem2mem H.264 encoder wrapper (codec h264)
>  V..... h264_vaapi           H.264/AVC (VAAPI) (codec h264)
> On yocto so far this is what I have managed so far ....
>  V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
>  V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)

Sounds like you need to enable v4l support, which looks like being --enable-libv4l2.

A patch to add a PACKAGECONFIG for that would be great.

Ross

Re: [yocto] #raspberrypi #ffmpeg

[Ross Burton]

On 4 May 2023, at 12:29, Ross Burton via lists.yoctoproject.org <ross.burton=arm.com@lists.yoctoproject.org> wrote:
> 
> On 4 May 2023, at 11:40, Ed Watson via lists.yoctoproject.org <edmundwatson=gmail.com@lists.yoctoproject.org> wrote:
>> 
>> Hello, 
>> 
>> I am trying to get v4l_mem2mem in to ffmpeg. It does hardware h264 encoding on a RPI4
>> ffmpeg  -encoders | grep h264
>> 
>> for example
>> ffmpeg -f v4l2  -i /dev/video0 -v:c v4l_mem2mem out.mp4
>> 
>> would take the a webcam output and encode it in h264 using the hardware encoder. 
>> On raspberry pi os:
>> V..... libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
>> V..... libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
>> V..... h264_omx             OpenMAX IL H.264 video encoder (codec h264)
>> V..... h264_v4l2m2m         V4L2 mem2mem H.264 encoder wrapper (codec h264)
>> V..... h264_vaapi           H.264/AVC (VAAPI) (codec h264)
>> On yocto so far this is what I have managed so far ....
>> V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
>> V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
> 
> Sounds like you need to enable v4l support, which looks like being --enable-libv4l2.
> 
> A patch to add a PACKAGECONFIG for that would be great.

FYI I just sent the patch to oe-core for ffmpeg, as it was a trivial change.  I’ve not tested it solves your problem, but you’re trying to use V4L2 support without it being enabled, so I suspect it will once you enable it.

Ross

Re: [yocto] #raspberrypi #ffmpeg

[Ed Watson]

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Hello,

Great thanks very much. Just getting to this..

Ok I am working on kirtstone RPI4-64bit

https://github.com/MarkusVolk/meta-kodi/tree/kirkstone/nexus/recipes-multimedia/ffmpeg/ffmpeg

| DEBUG: Python function extend_recipe_sysroot finished
| DEBUG: Executing shell function autotools_preconfigure
| DEBUG: Shell function autotools_preconfigure finished
| DEBUG: Executing python function autotools_aclocals
| DEBUG: SITE files ['endian-little', 'bit-64', 'arm-common', 'arm-64',
'common-linux', 'common-glibc', 'aarch64-linux', 'common']
| DEBUG: Python function autotools_aclocals finished
| DEBUG: Executing shell function do_configure
| ERROR: v4l2_m2m requested, but not all dependencies are satisfied:
linux_videodev2_h sem_timedwait


This is missing a kernel module right, do you also have the machine configs
around ?

Ed Watson



On Thu, 4 May 2023 at 13:41, Markus Volk <mrksvolk@googlemail.com> wrote:

> Am Do, 4. Mai 2023 um 03:40:30 -0700 schrieb Ed Watson <
> edmundwatson@gmail.com>:
>
> Anyone else go anywhere close?
>
>
> Got it working on rpi4. Unfortunaltely drmprime is running stable only
> with direct-to-plane rendering and behaves wonky if used with egl. Not
> ideal for wayland but working fine with gbm.
>
> I have imported some needed patches from LibreElec project.
> This might be useful for you:
>
> https://github.com/MarkusVolk/meta-kodi/tree/master/recipes-multimedia/ffmpeg/ffmpeg
>

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