i.MX Processors中的主题 Re: appsrc mp4mux get err:Buffer has no PTS

appsrc mp4mux get err:Buffer has no PTS

adorable — Wed, 04 Nov 2020 03:26:14 GMT

Gstreamer1.0 use appsink & appsrc ->vpu_h264->mp4mux->filesink，I find will got err as follows:

0:00:12.136406002 1021 0x1034120 FIXME               basesink gstbasesink.c:3144:gst_base_sink_default_event:<filesink0> stream-start event without group-id. Consider implementing group-id handling in the upstream elements
0:00:12.144873002 1021 0x1034120 WARN                   qtmux gstqtmux.c:3486:gst_qt_mux_add_buffer:<mp4mux0> error: Buffer has no PTS.
Received error
0:00:12.155500335 1021 0x1034120 WARN                   qtmux gstqtmux.c:3486:gst_qt_mux_add_buffer:<mp4mux0> error: Buffer has no PTS.

my pipiline is :

("imxv4l2src device=/dev/video1 num-buffers=100 ! video/x-raw,format=NV12,width=640,height=480,framerate=30/1 ! appsink name=myappsink");

("appsrc name=appsrct ! vpuenc_h264 ! h264parse ! mp4mux ! filesink location=h2641_apd.avi");

But when I replace mp4mux with avimux,then I will get file with avi ok.

My question is:

1、How should I do to deal with the err of mp4mux?

2、Why to use avimux OK,but mp4mux ERR?

Re: appsrc mp4mux get err:Buffer has no PTS

joanxie — Wed, 18 Nov 2020 04:34:25 GMT

did you use mp4mux to get xx.avi file? and try to use the latest bsp version to test

Re: appsrc mp4mux get err:Buffer has no PTS

adorable — Thu, 19 Nov 2020 01:33:31 GMT

Use mp4mux to get mp4 file through appsink and appsrc Failed.

But use avimux to get avi file through appsink and appsrc OK.

Re: appsrc mp4mux get err:Buffer has no PTS

joanxie — Fri, 20 Nov 2020 04:10:29 GMT

maybe you can refer to the link as below:

https://community.nxp.com/t5/i-MX-Processors/iMX6-gstreamer-pipeline-appsrc-to-mp4mux/m-p/459645

I'm not sure if your file name is xxx.avi, is it ok that you use mp4mux?

Re: appsrc mp4mux get err:Buffer has no PTS

adorable — Fri, 20 Nov 2020 08:44:53 GMT

My pipeline is : ("appsrc name=appsrct ! vpuenc_h264 ! h264parse ! mp4mux ! filesink location=h2641_apd.mp4");

And I also use h264parse in appsrc pipeline.But the results is as my question...

Re: appsrc mp4mux get err:Buffer has no PTS

joanxie — Wed, 25 Nov 2020 08:59:55 GMT

you can see the topic as below:

http://gstreamer-devel.966125.n4.nabble.com/quot-Buffer-has-no-PTS-quot-with-this-H264-IP-Camera-td4682586.html
qtmux reports "buffer has no PTS" if two consecutive buffers have the same timestamp. This can occur if h264parse receives a frame with invalid timestamp e.g. CLOCK_TIME_NONE it then guesses a timestamp. You could insert a pad-probe which checks the timestamps before h264parse and checks that the timestamp is plausible.

Re: appsrc mp4mux get err:Buffer has no PTS

adorable — Thu, 03 Dec 2020 01:18:28 GMT

Thanks to joanxie,Now the problom has been solved.

gst err: "buffer has no pts" due to in appsink , not add PTS timestamp

GST_BUFFER_PTS (buffer) = timestamp;
GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale_int (1, GST_SECOND, framerate);
timestamp += GST_BUFFER_DURATION (buffer);

uper codec could add buffer pts,and mp4mux->filesink could be OK.

Re: appsrc mp4mux get err:Buffer has no PTS

joanxie — Thu, 03 Dec 2020 01:50:07 GMT

good to hear this, thanks for sharing the result