Best way to save video on Rpi3

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Best way to save video on Rpi3

Myzhar
Hi all,

I need to save a stream from a ELP USB webcam on a Raspberry Pi 3 at higher resolution and higher framerate as possible.

I reached my best result with a video at 1280x720x12fps

Anyone has obtained better results?

My pipeline is the following:

gst-launch-1.0 v4l2src device=/dev/video0 ! queue ! videoscale ! "video/x-raw,width=1280,height=720" ! queue ! videoconvert ! omxh264enc ! queue ! h264parse ! queue ! filesink location=test.mp4 -e

Thank you
Walter

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Re: Best way to save video on Rpi3

Olivier Crête-3
Hi,

You may want to have a look at https://github.com/thaytan/gst-rpicamsrc

This should let you use the hardware to the max of it's capacity.

Olivier

On Tue, 2017-02-07 at 00:57 -0800, Myzhar wrote:

> Hi all,
>
> I need to save a stream from a ELP USB webcam on a Raspberry Pi 3 at
> higher
> resolution and higher framerate as possible.
>
> I reached my best result with a video at 1280x720x12fps
>
> Anyone has obtained better results?
>
> My pipeline is the following:
>
> gst-launch-1.0 v4l2src device=/dev/video0 ! queue ! videoscale !
> "video/x-raw,width=1280,height=720" ! queue ! videoconvert !
> omxh264enc !
> queue ! h264parse ! queue ! filesink location=test.mp4 -e
>
> Thank you
> Walter
>
>
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble
> .com/Best-way-to-save-video-on-Rpi3-tp4681749.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
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Re: Best way to save video on Rpi3

Myzhar
Hi Olivier,

that's a good project, but I'm not using the rpicam. I'm using an HD USB camera made by ELP: http://www.elpcctv.com/

Thank you
Walter

2017-02-09 21:28 GMT+01:00 Olivier Crête <[hidden email]>:
Hi,

You may want to have a look at https://github.com/thaytan/gst-rpicamsrc

This should let you use the hardware to the max of it's capacity.

Olivier

On Tue, 2017-02-07 at 00:57 -0800, Myzhar wrote:
> Hi all,
>
> I need to save a stream from a ELP USB webcam on a Raspberry Pi 3 at
> higher
> resolution and higher framerate as possible.
>
> I reached my best result with a video at 1280x720x12fps
>
> Anyone has obtained better results?
>
> My pipeline is the following:
>
> gst-launch-1.0 v4l2src device=/dev/video0 ! queue ! videoscale !
> "video/x-raw,width=1280,height=720" ! queue ! videoconvert !
> omxh264enc !
> queue ! h264parse ! queue ! filesink location=test.mp4 -e
>
> Thank you
> Walter
>
>
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble
> .com/Best-way-to-save-video-on-Rpi3-tp4681749.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
--
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Re: Best way to save video on Rpi3

Nicolas Dufresne-5
In reply to this post by Myzhar
Le mardi 07 février 2017 à 00:57 -0800, Myzhar a écrit :

> I need to save a stream from a ELP USB webcam on a Raspberry Pi 3 at
> higher
> resolution and higher framerate as possible.
>
> I reached my best result with a video at 1280x720x12fps
>
> Anyone has obtained better results?
>
> My pipeline is the following:
>
> gst-launch-1.0 v4l2src device=/dev/video0 ! queue ! videoscale !
> "video/x-raw,width=1280,height=720" ! queue ! videoconvert !
> omxh264enc !
> queue ! h264parse ! queue ! filesink location=test.mp4 -e
Most of the time, the limiting factor is USB Speed. If you don't have
USB3, you have to use some compression in order to gain higher frame-
rate. That's why most USB camera supports JPEG compression, and fancier
camera will support H264. Try one of this compression.

Nicolas
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Re: Best way to save video on Rpi3

Myzhar
Hi Nicolas,

as far as I know the ELP cameras supports MJPEG format, but I have not understood the right way to get this format using "vl42src".

I tried a lot of "formats", but only I420 is accepted.

Walter

2017-02-09 22:18 GMT+01:00 Nicolas Dufresne <[hidden email]>:
Le mardi 07 février 2017 à 00:57 -0800, Myzhar a écrit :
> I need to save a stream from a ELP USB webcam on a Raspberry Pi 3 at
> higher
> resolution and higher framerate as possible.
>
> I reached my best result with a video at 1280x720x12fps
>
> Anyone has obtained better results?
>
> My pipeline is the following:
>
> gst-launch-1.0 v4l2src device=/dev/video0 ! queue ! videoscale !
> "video/x-raw,width=1280,height=720" ! queue ! videoconvert !
> omxh264enc !
> queue ! h264parse ! queue ! filesink location=test.mp4 -e

Most of the time, the limiting factor is USB Speed. If you don't have
USB3, you have to use some compression in order to gain higher frame-
rate. That's why most USB camera supports JPEG compression, and fancier
camera will support H264. Try one of this compression.

Nicolas

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Re: Best way to save video on Rpi3

Nicolas Dufresne-5


Le 9 févr. 2017 5:31 PM, "Walter Lucetti" <[hidden email]> a écrit :
Hi Nicolas,

as far as I know the ELP cameras supports MJPEG format, but I have not understood the right way to get this format using "vl42src".

You can get JPEG from v4l2src using a caps filter as follow:

  v4l2src ! image/jpeg ! ...

This is supported by nearly all USB cameras these days. Try with your laptop camera as an reference. I don't own an ELP, so I'm not able to validate if there is any issue specific to this model.

Regards,
Nicolas


I tried a lot of "formats", but only I420 is accepted.

Walter

2017-02-09 22:18 GMT+01:00 Nicolas Dufresne <[hidden email]>:
Le mardi 07 février 2017 à 00:57 -0800, Myzhar a écrit :
> I need to save a stream from a ELP USB webcam on a Raspberry Pi 3 at
> higher
> resolution and higher framerate as possible.
>
> I reached my best result with a video at 1280x720x12fps
>
> Anyone has obtained better results?
>
> My pipeline is the following:
>
> gst-launch-1.0 v4l2src device=/dev/video0 ! queue ! videoscale !
> "video/x-raw,width=1280,height=720" ! queue ! videoconvert !
> omxh264enc !
> queue ! h264parse ! queue ! filesink location=test.mp4 -e

Most of the time, the limiting factor is USB Speed. If you don't have
USB3, you have to use some compression in order to gain higher frame-
rate. That's why most USB camera supports JPEG compression, and fancier
camera will support H264. Try one of this compression.

Nicolas

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Re: Best way to save video on Rpi3

Tim Müller
In reply to this post by Myzhar
On Thu, 2017-02-09 at 23:29 +0100, Walter Lucetti wrote:

> as far as I know the ELP cameras supports MJPEG format, but I have
> not understood the right way to get this format using "vl42src".
>
> I tried a lot of "formats", but only I420 is accepted.

Try something like this for starters:

  gst-launch-1.0 v4l2src ! image/jpeg ! queue ! jpegparse ! matroskamux
! filesink location=video.mkv


You should be able to see a list of the supported formats with

  gst-device-monitor-1.0 Video/Source

Cheers
 -Tim

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Re: Best way to save video on Rpi3

Myzhar
I tried with H264, it works really well on my laptop, but on Rpi3 jpegenc seems to crash. I don't remember the error and I cannot verify it until I will not receive my second Rpi3. 
I left the other to the customer that is trying to make video on sport events ;-)


Il 12 Feb 2017 19:50, "Tim Müller" <[hidden email]> ha scritto:
On Thu, 2017-02-09 at 23:29 +0100, Walter Lucetti wrote:

> as far as I know the ELP cameras supports MJPEG format, but I have
> not understood the right way to get this format using "vl42src".
>
> I tried a lot of "formats", but only I420 is accepted.

Try something like this for starters:

  gst-launch-1.0 v4l2src ! image/jpeg ! queue ! jpegparse ! matroskamux
! filesink location=video.mkv


You should be able to see a list of the supported formats with

  gst-device-monitor-1.0 Video/Source

Cheers
 -Tim

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