[gst-devel] How to keep timestamp in the file recorded from RTSP source

[Marco Ballesio]

Hi,

On Mon, Oct 25, 2010 at 12:01 PM, Laurence <laurenceinc at gmail.com> wrote:

>
> Hi all,
> I create two applications for "record files from ipcam", and "play the
> files". The two application are worked.
> The pipelines are as follows:
> record: rtspsrc ! identity ! rtph264depay ! filesink
>

I'd suggest you to try with a muxer between the depayloader and the sink
(e.g. mp4mux).

Regards


> play:    filesrc ! typefind ! rtph264pay ! identity ! fakesink
>
> In the "record" application, I use
> "GST_BUFFER_TIMESTAMP()","GST_BUFFER_DURATION",
> "GST_BUFFER_TIMESTAMP_IS_VALID","GST_BUFFER_GST_BUFFER_DURATION_IS_VALID"
> in
> identity, and print messages as follows:
> ...
> timestamp:3218 valid:1 duration:4294967295 valid:0
> timestamp:3218 valid:1 duration:4294967295 valid:0
> timestamp:3333 valid:1 duration:4294967295 valid:0
> timestamp:3333 valid:1 duration:4294967295 valid:0
> timestamp:3333 valid:1 duration:4294967295 valid:0
> ...
> (print format: timestamp,duration=> unsigned int, valid=>int)
>
> It looks like the value of timestamp is vaild,but the value of duration is
> invaild.
>
> Then,I use the "play" application to play the file, and print messages in
> identity. The messages are as follows:
> ...
> timestamp:4294967295 valid:0 duration:4294967295 valid:0
> timestamp:4294967295 valid:0 duration:4294967295 valid:0
> timestamp:4294967295 valid:0 duration:4294967295 valid:0
> timestamp:4294967295 valid:0 duration:4294967295 valid:0
> timestamp:4294967295 valid:0 duration:4294967295 valid:0
> timestamp:4294967295 valid:0 duration:4294967295 valid:0
> ...
>
> In the recorded file,timestamp and duration are invalid.
>
> I have two questions:
> 1. In the "record" application,timestamp is existed, but I can't read it in
> "play" application. I guess that "rtph264depay" don't keep timestamp, so
> there is no timestamp in the recorded file. What do you think of this?
> 2. I would like to write a "timestamp control function" for recorded files
> playing. So I have to get timestamp in the recorded file. Is there any way
> to keep timestamp in the recorded file?
>
> Thanks in advance!
> --
> View this message in context:
> http://gstreamer-devel.966125.n4.nabble.com/How-to-keep-timestamp-in-the-file-recorded-from-RTSP-source-tp3009950p3009950.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
>
>
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