Quantcast

mp4mux audio not sync when video in 30FPS

classic Classic list List threaded Threaded
3 messages Options
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

mp4mux audio not sync when video in 30FPS

arizonausa
Hi there,

I get some issue when mux audio and video into a mp4 file, the audio out of sync when video in 30FPS
the pipeline is kind as following,

appsrc-> omxh264enc -> h264parse ->
                                                            mp4mux-> filesink
udpsrc-> rtpmp4gdepay -> aacparse ->

This works fine when "appsrc" get a 60fps video coming, when the it change to 30fps, it is not sync anymore, the only change I did was the frame-rate parameter for the "appsrc"( v_rate  ). If I only run video or audio pipeline, there is no problem, I may not take care the timestamp correctly when muxing. Do anyone have ideas on this case, I am struggling this for a while.

so the caps for the "appsrc" is

g_object_set( G_OBJECT( source ),
                  "is-live", TRUE,
                  "format", 3,
                  "emit-signals", TRUE,
                  "do-timestamp", TRUE,
                  "max-bytes", 0,
                  "caps", gst_caps_new_simple( "video/x-raw",
                                                               "format", G_TYPE_STRING, "I420",
                                                               "width", G_TYPE_INT, v_width,
                                                               "height", G_TYPE_INT, v_height,
                                                               "framerate", GST_TYPE_FRACTION, (int)v_rate*1000, 1000,
                                                                NULL ),
                  NULL );

so the caps for the "udpsrc" is

g_object_set( G_OBJECT( gstptr->audio_src ),
                      "address", "127.0.0.1",
                      "do-timestamp", TRUE,
                      "port", 5006,
                      "caps", gst_caps_new_simple( "application/x-rtp",
                                                   "media", G_TYPE_STRING, "audio",
                                                   "clock-rate", G_TYPE_INT, 48000,
                                                   "encoding-name", G_TYPE_STRING, "MPEG4-GENERIC",
                                                   "encoding-params", G_TYPE_STRING, "2",
                                                   "streamtype", G_TYPE_STRING, "5",
                                                   "profile-level-id", G_TYPE_STRING, "2",
                                                   "mode", G_TYPE_STRING, "AAC-hbr",
                                                   "config", G_TYPE_STRING, "1190",
                                                   "sizelength", G_TYPE_STRING, "13",
                                                   "indexlength", G_TYPE_STRING, "3",
                                                   "indexdeltalength", G_TYPE_STRING, "3",
                                                   "constantDuration", G_TYPE_STRING, "1024",
                                                   "payload", G_TYPE_INT, 96,
                                                   NULL ),
                      NULL );









Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

Re: mp4mux audio not sync when video in 30FPS

arizonausa
No one have this problem?
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

Re: mp4mux audio not sync when video in 30FPS

Nicolas Dufresne-5
Looks like gst-omx kind of issues with timestamp.

Nicolas


Le 28 avr. 2017 5:44 PM, "arizonausa" <[hidden email]> a écrit :
No one have this problem?



--
View this message in context: http://gstreamer-devel.966125.n4.nabble.com/mp4mux-audio-not-sync-when-video-in-30FPS-tp4682819p4682847.html
Sent from the GStreamer-devel mailing list archive at Nabble.com.
_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel


_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
Loading...