How to save incoming h264 stream without re-encoding?

[Tiago Katcipis]

Hi,

On Tue, May 15, 2012 at 8:43 AM, Rufael Mekuria <R.N.Mekuria at cwi.nl> wrote:

> I don't think its such a good idea to save H.264 to avi, I would recommend
> trying mp4mux and save to mp4 instead,
>

There is also Matroska:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-matroskamux.html

Best regards,
Tiago Katcipis


>
> hope it helps, with me this works fine.
>
> best,
>
> Rufael
>
> ----- Oorspronkelijk bericht -----
> Van: "garrett" <weaverg at email.arizona.edu>
> Aan: gstreamer-devel at lists.freedesktop.org
> Verzonden: Dinsdag 15 mei 2012 04:00:28
> Onderwerp: Re: How to save incoming h264 stream without re-encoding?
>
> I'm trying to do the exact same thing. I stumbled upon a heap of unanswered
> threads like these on my search, so I'll bump this one because it's most
> similar to what I want to do.
>
> I'm trying to transmit H264 video in RTP packets, over UDP and then on the
> receiving end reconvert the packets into an H264 stream and both output the
> stream with ximagesink and save the h264 stream into a file.
>
> I can output the live stream to ximagesink just fine. Saving the stream is
> a
> whole different ordeal. No matter what I do, I cannot save a stream to a
> file.
>
> I'll start by posting my transmit script.
> gst-launch-0.10 v4l2src ! queue ! 'video/x-raw-yuv,width=640,height=480' !
> x264enc bitrate=500 speed-preset=superfast tune=zerolatency ! queue !
> rtph264pay ! udpsink host=224.1.1.1 port=5010 auto-multicast=true
>
> This is my most desired receiving script (it's supposed to both show the
> video in a window and write the video to an avi file):
> gst-launch-0.10 udpsrc multicast-group=224.1.1.1 auto-multicast=true
> port=5010 caps='application/x-rtp, media=(string)video,
> clock-rate=(int)90000, encoding-name=(string)H264,
>
> sprop-parameter-sets=(string)\"Z0KAHukBQHpCAAAH0AAB1MAIAA\\=\\=\\,aM48gAA\\=\",
> payload=(int)96, ssrc=(uint)3315029550, clock-base=(uint)3926529534,
> seqnum-base=(uint)45576' ! gstrtpjitterbuffer drop-on-latency=true
> latency=500  ! rtph264depay ! tee name=videosrc \
> videosrc. ! queue ! ffdec_h264 ! ffmpegcolorspace ! ximagesink sync=false \
> videosrc. ! queue ! avimux ! filesink location=video.avi
>
> Unfortunately that doesn't work, doesn't throw any errors, but it doesn't
> bring up the video window nor does it try to write a file. If I take out
> the
> last line (the tee for printing out the file), it does bring up the video
> window. If I take out the second to last line (the tee for displaying the
> window) it creates the file, but it's zero bytes in size.
>
> My scripts do depend on the elements rtph264pay and rtph264depay which are
> poorly documented. I thought that perhaps the output of rtph264depay
> doesn't
> output an h264 format avimux likes. So I ran this script:
> gst-launch-0.10 v4l2src ! queue ! 'video/x-raw-yuv,width=640,height=480' !
> x264enc bitrate=500 speed-preset=superfast tune=zerolatency ! rtph264pay !
> rtph264depay ! avimux ! filesink location=video.avi
>
> Which doesn't work, it only writes a file of zero bytes large, but if I
> took
> out the "rtph264pay ! rtph264depay !" part, it works fine. But what's more?
> If I add "ffdec_h264 ! ffmpegcolorspace !" between rtph264depay and avimux
> it does write a file (albeit a very large file).
>
> But then if I try to run this script as the receive script (just to try to
> write a file):
> gst-launch-0.10 udpsrc multicast-group=224.1.1.1 auto-multicast=true
> port=5010 caps='application/x-rtp, media=(string)video,
> clock-rate=(int)90000, encoding-name=(string)H264,
>
> sprop-parameter-sets=(string)\"Z0KAHukBQHpCAAAH0AAB1MAIAA\\=\\=\\,aM48gAA\\=\",
> payload=(int)96, ssrc=(uint)3315029550, clock-base=(uint)3926529534,
> seqnum-base=(uint)45576' ! gstrtpjitterbuffer drop-on-latency=true
> latency=500  ! rtph264depay ! ffdec_h264 ! ffmpegcolorspace ! tee
> name=videosrc \
> videosrc. ! queue ! avimux ! filesink location=video.avi
>
> It does not work. So what is the deal here? Is there any way to write video
> from a h264 stream?
>
> --
> View this message in context:
> http://gstreamer-devel.966125.n4.nabble.com/How-to-save-incoming-h264-stream-without-re-encoding-tp1559487p4633660.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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