omxh264enc and stream-format=(string)avc

Tue Apr 14 13:46:31 PDT 2015

Thank you for the support and suggestions.

I am trying theres pipelines with wowza and the only that is not working is
the one with x264enc encoder (the first one).

GST_DEBUG=4 GST_DEBUG_FILE=gst_x264_rtmp.log gst-launch-1.0 -evm v4l2src !
video/x-raw, framerate=30/1,width=1280,height=720  ! videorate !
videoscale  ! videoconvert ! *x264enc* pass=pass1 threads=5 bitrate=5000
tune=zerolatency ! video/x-h264,profile=high,framerate=30/1 ! flvmux !
rtmpsink location='rtmp://<ip>:1935/live/myStream'

These  are using the omxh264enc but only have different log levels and
output information.

*GST_DEBUG=4 *GST_DEBUG_FILE=gst_omx_rtmp.log gst-launch-1.0 -evm v4l2src !
video/x-raw, framerate=30/1,width=1280,height=720  ! videorate !
videoscale  ! videoconvert ! omxh264enc  !
video/x-h264,profile=high,framerate=30/1,target-bitrate=2000000 ! flvmux !
rtmpsink location='rtmp://<ip>:1935/live/myStream'

*GST_DEBUG=2,*rtmp*:5* GST_DEBUG_FILE=gst_omx_rtmp2.log gst-launch-1.0 -evm
v4l2src ! video/x-raw, framerate=30/1,width=1280,height=720  ! videorate !
videoscale  ! videoconvert ! omxh264enc  !
video/x-h264,profile=high,framerate=30/1,target-bitrate=2000000 ! flvmux !
rtmpsink location='rtmp://1<ip>:1935/live/myStream'

In This i am using the suggested h264parse followed by the required caps
but did not worked.

GST_DEBUG=3,*rtmp*:5 GST_DEBUG_FILE=gst_omx_avc.log gst-launch-1.0 -evm
v4l2src ! video/x-raw,framerate=30/1,width=1280,height=720  ! videorate !
videoscale  ! videoconvert ! omxh264enc  !
video/x-h264,framerate=30/1,width=1280,height=720,profile=high,framerate=30/1,target-bitrate=2000000
! *h264parse !
video/h-264,framerate=30/1,width=1280,height=720,stream-format=avc,alignment=au*
! flvmux  ! rtmpsink location='rtmp://<ip>:1935/live/myStream'

I attached the log files so someone can have a look for better
troubleshooting.

Please help me solving this issue.

Br,
Joao M.

On Mon, Apr 13, 2015 at 2:08 PM, Sérgio Agostinho <
sergio.r.agostinho at gmail.com> wrote:

> Don't forget the tune zero latency property on x264enc. Should help you
> minimize the latency.
>
> Sent from my Phone
>
> On 12 Apr 2015, at 20:22, joao machado <00jmsmachado at gmail.com> wrote:
>
> Hi all,
>
> I  am using Rpi and Gstreamer to stream my HD web cam with low latency.
> Currently I am using two different encoders for that purpose. With the omx
> I am getting some video quality issues and with x264 i am getting high CPU
> usage and low frequency.
>
> The following is the pipe with x264 encoder
> <http://www.raspberrypi.org/forums/viewtopic.php?f=29&t=106455&p=734508#>gst-launch-1.0
> -vv v4l2src ! videoscale !  videorate  ! videoconvert ! \
>   video/x-raw,width=1280,height=720,framerate=30/1  ! x264enc bitrate=8000
> ! \
> h264parse !  rtph264pay pt=96 config-interval=1 ! udpsink host=$1 port=$2
>
> The following are pipelines with low latency but with quality issues,
> despite the value that is use in the bitrate property.
> gst-launch-1.0 -vv v4l2src ! videoscale !  videorate  ! videoconvert ! \
>   video/x-raw,width=720,height=480,framerate=30/1  ! omxh264enc
> inline-header=true periodicty-idr=1 ! \
> video/x-h264,width=720,height=480,framerate=30/1,profile=high,target-bitrate=8000000,control-rate=variable,quant-i-frames=250
> ! \
> rtph264pay pt=96 ! udpsink host=$1 port=$2
>
> gst-launch-1.0 -vv v4l2src  \
> image/jpeg,width=1280,height=720,framerate=30/1  ! jpegdec ! videoconvert
> ! \
> video/x-raw,width=1280,height=720  ! videorate !  omxh264enc
> inline-header=true periodicty-idr=1 ! \
> video/x-h264,width=1280,height=720,framerate=30/1,profile=high,target-bitrate=5000000
> ! \
> rtph264pay pt=96 ! udpsink host=$1 port=$2
>
>
> The only difference that i found was in the stream-format property.
>
> *x264enc*
>
> video/x-h264,
> codec_data=(buffer)0164001effe1001d6764001eacd940b43dbff0020001b10000030001000003003c8f162d9601000568ebecb22c,
> *stream-format=(string)avc*, alignment=(string)au, level=(string)3,
> profile=(string)high, width=(int)720, height=(int)480,
> pixel-aspect-ratio=(fraction)32/27, framerate=(fraction)30/1
>
> *omxh264enc*
>
> video/x-h264, *stream-format=(string)byte-stream*, alignment=(string)au,
> profile=(string)high, level=(string)4, width=(int)720, height=(int)480,
> pixel-aspect-ratio=(fraction)32/27, framerate=(fraction)30/1
>
> Would be really cool to understand what is needed to change the stream
> format.
>
> Looking forward to have some clues from this community.
>
> Thanks in advance,
> Joao M.
>
> <x264_omx264.png>
>
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>
>
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