[gst-devel] distorted video encoded with x264

[Rafael Sousa]

Hi all,

I've fixed my problem by adding the following parameter to the x264enc:

"pass=qual quantizer=20 tune=zerolatency"

the video presented was perfect... thanks for the replies.



On Thu, Dec 16, 2010 at 12:11 AM, Rafael Sousa <rafael.lmsousa at gmail.com>wrote:

> When I use the x264 build 85 that issue doesn't occur, the video is
> perfect, only in superior build that I tested (98 and 110) that the problem
> occur. I don't have any idea of what can be happening, I've already removed
> and installed the packages several times, I even upgraded my ubuntu system
> from 10.04 to 10.10 but no change. Anyone have any idea? I've tried all that
> I know. I need to use the build 98 or superior.
>
> thanks for the reply
>
> Message: 1
>
>> Date: Wed, 15 Dec 2010 15:42:01 -0500
>> From: Timothy Braun <braunsquared at gmail.com>
>> Subject: Re: [gst-devel] distorted video encoded with x264
>> To: Discussion of the development of GStreamer
>>        <gstreamer-devel at lists.sourceforge.net>
>> Message-ID: <69C57452-40E4-4172-883F-DF374D355CD7 at gmail.com>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> I'm no expert on this, but ran into similar issues when making a local
>> file. It ultimately ended up being the parameters I was passing to the
>> x264enc element. I would take a look at those with gst-inspect and see if
>> you can tune the output. Most notably the pass and quantizer parameters.
>>
>> Tim
>>
>> Sent from my iPhone
>>
>>
>> On Dec 15, 2010, at 3:02 PM, Rafael Sousa <rafael.lmsousa at gmail.com>
>> wrote:
>>
>> > Hi all,
>> >
>> > I'm using the versions of gstreamer installed from ubuntu 10.10 apt-get.
>> I've installed the gstreamer, gst-plugins-bad, gst-plugins-good,
>> gst-plugins-ugly, gst-ffmpeg and I've installed the x264.
>> >
>> > The problem is that my pipeline gives as result a blurring video. My
>> pipeline works to read a YUV file at the sender, encodes it in H.264, and
>> sends it to receiver using RTP in encoding time. At the receiver, it
>> receives the stream and stores it in YUV format again for posterior process.
>> The pipeline is as follows:
>> >
>> > Sender:
>> >
>> > "gstrtpbin name=rtpbin filesrc location=paris_cif.yuv blocksize=152064 !
>> video/x-raw-yuv, width=352, height=288, framerate=(fraction)15/1,
>> format=(fourcc)I420 ! x264enc, key-int-max=30, key-int-min=15,
>> intra-refresh=true ! rtph264pay ! rtpbin.send_rtp_sink_0
>> rtpbin.send_rtp_src_0 ! udpsink host=127.0.0.1 port=5000
>> rtpbin.send_rtcp_src_0 ! udpsink host=5003 port=5001 sync=false async=false
>> udpsrc port=5005 ! rtpbin.recv_rtcp_sink_0 "
>> >
>> > Receiver:
>> >
>> > "gstrtpbin name=rtpbin udpsrc
>> caps=\"application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264"
>> port=5000 ! rtpbin.recv_rtp_sink_0 rtpbin. ! rtph264depay ! ffdec_h264 !
>> filesink location=example.yuv udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0
>> rtpbin.send_rtcp_src_0 ! udpsink port=5005 sync=false async=false"
>> >
>> > I don't know why the video is blurring since I've tested it localhost,
>> without loss rates. The command that I'm using to watch the result is:
>> >
>> > mplayer example.yuv -demuxer rawvideo -rawvideo cif
>> >
>> > I took a screenshot of the video, it is in annex. Please, anyone can
>> help?
>> >
>> > thanks in advance
>> > <Captura_de_tela.png>
>> >
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