[ request for comments ] seek problem and playback speed too fast

[somanath sahoo-2]

Hi,

I am trying to record an incoming live stream into mp4 format. I am able to play that mp4 video file, But i am not able to seek while it plays and Its playing too fast.

For sending streaming data to network --

gst-launch-0.10 v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480' ! x264enc pass=qual quantizer=20 tune=zerolatency ! rtph264pay ! udpsink host=127.0.0.1 port=1234

for recording the incoming live stream -

gst-launch-0.10 -e udpsrc port=1234 ! "application/x-rtp, payload=127" ! rtph264depay ! filesink location=x001.mp4

Please any can provide pointers on this issue so that i can able to seek properly while i playback that mp4 file along with its normal speed.

I am looking forward for some guidance.

Thanks & Regards,
Somanath

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[somanath sahoo-2]

Hi,

I am trying to record an incoming live stream into mp4 format. I am able to play that mp4 video file, But i am not able to seek while it plays and Its playing too fast.

For sending streaming data to network --

gst-launch-0.10 v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480' ! x264enc pass=qual quantizer=20 tune=zerolatency ! rtph264pay ! udpsink host=127.0.0.1 port=1234

for recording the incoming live stream -

gst-launch-0.10 -e udpsrc port=1234 ! "application/x-rtp, payload=127" ! rtph264depay ! filesink location=x001.mp4

Please any can provide pointers on this issue so that i can able to seek properly while i playback that mp4 file along with its normal speed.

I thought it was clock sync problem. i tried with identity element. but i couldn't able to resolve it. 

I am looking forward for some guidance.

Thanks & Regards,
Somanath

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[somanath sahoo-2]

Hi,

I am trying to record an incoming live stream into mp4 format. I am able to play that mp4 video file, But i am not able to seek while it plays and Its playing too fast.

For sending streaming data to network --

gst-launch-0.10 v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480' ! x264enc pass=qual quantizer=20 tune=zerolatency ! rtph264pay ! udpsink host=127.0.0.1 port=1234

for recording the incoming live stream -

gst-launch-0.10 -e udpsrc port=1234 ! "application/x-rtp, payload=127" ! rtph264depay ! filesink location=x001.mp4

Please any can provide pointers on this issue so that i can able to seek properly while i playback that mp4 file along with its normal speed.

I thought it was clock sync problem. i tried with identity element. but i couldn't able to resolve it. 

I am looking forward for some guidance.

Thanks & Regards,
Somanath

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[Tim-Philipp Müller-2]

On Fri, 2012-10-12 at 23:12 -0700, somanath sahoo wrote:

Hi,

> I am trying to record an incoming live stream into mp4 format. I am
> able to play that mp4 video file, But i am not able to seek while it
> plays and Its playing too fast.

How are you trying to play it back?

I don't think you will be able to play it back while the file is still
being written to.

If you need to be able to do that, you should create a file in a
streamable format such as e.g. mpeg-ts or mpeg-ps perhaps.

If you ever use these pipelines between two different machines, you
might also want a jitterbuffer before the depayloader (not related to
your issue though).

Cheers
 -Tim

> For sending streaming data to network --
>
>
>
> gst-launch-0.10 v4l2src device=/dev/video0 !
> 'video/x-raw-yuv,width=640,height=480' ! x264enc pass=qual
> quantizer=20 tune=zerolatency ! rtph264pay ! udpsink host=127.0.0.1
> port=1234
>
>
> for recording the incoming live stream -
>
>
>
> gst-launch-0.10 -e udpsrc port=1234 ! "application/x-rtp,
> payload=127" ! rtph264depay ! filesink location=x001.mp4
>
>
>
>
> Please any can provide pointers on this issue so that i can able to
> seek properly while i playback that mp4 file along with its normal
> speed.
>
>
> I thought it was clock sync problem. i tried with identity element.
> but i couldn't able to resolve it.
>
>
> I am looking forward for some guidance.
>
>
>
>
> Thanks & Regards,
> Somanath
>
>
>
>
>
>
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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[somanath sahoo-2]

Hi Tim,

>Date: Sat, 13 Oct 2012 12:03:45 +0100
>From: Tim-Philipp M?ller <[hidden email]>

>On Fri, 2012-10-12 at 23:12 -0700, somanath sahoo wrote:

>>Hi,

>> I am trying to record an incoming live stream into mp4 format. I am
>> able to play that mp4 video file, But i am not able to seek while it
>> plays and Its playing too fast.

>How are you trying to play it back?

I am not trying play while i am recording from the stream.

I am trying to record for some time and pressing control+c which forcing EOS and mp4 file has been created.  then i am trying play that mp4 file using media player available with ubuntu 12.04.

Please help me to know what i am doing wrong in the below pipeline while i am trying to record a stream into mp4 format  for a duration by pressing cntr+c which forces EOS to the mp4 file. The problem that i am facing ; the seek is not working and playing too fast when i am trying to play that recorded mp4 file. here is the pipeline --

gst-launch-0.10 -e udpsrc port=1234 ! "application/x-rtp,payload=127" ! rtph264depay ! filesink location=x001.mp4


Regards,
Somanath

>I don't think you will be able to play it back while the file is still
being written to.

>If you need to be able to do that, you should create a file in a
>streamable format such as e.g. mpeg-ts or mpeg-ps perhaps.

>If you ever use these pipelines between two different machines, you
>might also want a jitterbuffer before the depayloader (not related to
>your issue though).

>Cheers
>-Tim

>> For sending streaming data to network --
>>
>
>
> gst-launch-0.10 v4l2src device=/dev/video0 !
> 'video/x-raw-yuv,width=640,height=480' ! x264enc pass=qual
> quantizer=20 tune=zerolatency ! rtph264pay ! udpsink host=127.0.0.1
> port=1234
>
>
> for recording the incoming live stream -
>
>
>
> gst-launch-0.10 -e udpsrc port=1234 ! "application/x-rtp,
> payload=127" ! rtph264depay ! filesink location=x001.mp4
>
>
>
>
> Please any can provide pointers on this issue so that i can able to
> seek properly while i playback that mp4 file along with its normal
> speed.
>
>
> I thought it was clock sync problem. i tried with identity element.
> but i couldn't able to resolve it.
>
>
> I am looking forward for some guidance.
>
>
>
>
> Thanks & Regards,
> Somanath
>
>
>
>
>
>
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

------------------------------

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End of gstreamer-devel Digest, Vol 21, Issue 28
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[Tim-Philipp Müller-2]

On Sun, 2012-10-14 at 22:51 -0700, somanath sahoo wrote:

Hi,

> I am not trying play while i am recording from the stream.
>
> I am trying to record for some time and pressing control+c which
> forcing EOS and mp4 file has been created.  then i am trying play that
> mp4 file using media player available with ubuntu 12.04.
>
> Please help me to know what i am doing wrong in the below pipeline
> while i am trying to record a stream into mp4 format  for a duration
> by pressing cntr+c which forces EOS to the mp4 file. The problem that
> i am facing ; the seek is not working and playing too fast when i am
> trying to play that recorded mp4 file. here is the pipeline --
>
> gst-launch-0.10 -e udpsrc port=1234 !
> "application/x-rtp,payload=127" ! rtph264depay ! filesink
> location=x001.mp4

You should mux the h264 data into a container, e.g. with mp4mux or
matroskamux or mpegpsmux. That will preserve timestamps. And don't
forget about that gstrtpjitterbuffer before the depayloader.

Cheers
 -Tim


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