[Bug 753109] New: omxh264enc cannot stream to HLS: black screen in Safari and iOS

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=753109

            Bug ID: 753109
           Summary: omxh264enc cannot stream to HLS: black screen in
                    Safari and iOS
    Classification: Platform
           Product: GStreamer
           Version: 1.4.5
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-omx
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: minfrin at sharp.fm
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Video encoded with the omxh264enc codec results in a black screen on Safari and
iOS. No warnings or errors appear.

The video plays on VLC, but seems to "freeze" periodically. Again, no warnings
or errors appear.

Other bugs suggest that omxh264enc should be capable of producing streaming
video, but I cannot find a combination of gstreamer versions that work at all.

The Apple mediastreamvalidator tool passes the stream as "OK" with no warnings
or errors. A separate bug has been raised with Apple to fix
mediastreamvalidator and stop it passing broken streams.

The Adobe HLS validator claims SPS/PPS headers are missing and this is why the
stream won't play.

Getting the omxh264enc encoder up and running on the debugger shows that
OMX_IndexParamBrcmVideoAVCInlineHeaderEnable and
OMX_IndexConfigVideoAVCIntraPeriod are being set, but neither of these options
are documented nor do they have any measurable effect.

The RPi has the required mpeg2 license.

The command line used is this:

gst-launch-1.0 -v udpsrc port=5004 multicast-group=239.255.1.30
caps="application/x-rtp,media=(string)video,clock-rate=(int)90000" ! rtpbin !
rtpmp2tdepay ! tsdemux name=demux ! mpegvideoparse ! omxmpeg2videodec ! queue !
videoconvert ! deinterlace ! videoscale ! video/x-raw,width=960,height=540 !
omxh264enc target-bitrate=5000000 control-rate=variable inline-header=true
periodicty-idr=1 interval-intraframes=1 ! queue ! mpegtsmux name=mux ! hlssink
location=/var/www/stream/segment2%05d.ts
playlist-location=/var/www/stream/output2.m3u8
playlist-root=http://192.168.225.3/stream/ target-duration=2

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