[Bug 774182] New: [MVC][decode] fail to deal alignment as nal.

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=774182

            Bug ID: 774182
           Summary: [MVC][decode] fail to deal alignment as nal.
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: fei.w.wang at intel.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

1. Testing Steps:
========================================================================
gst-launch-1.0 -q filesrc location=/media/mvc/MVCDS-1.264 '!' h264parse '!'
video/x-h264,stream-format=byte-stream,alignment=nal '!' vaapih264dec '!'
vaapipostproc format=i420 deinterlace-mode=disabled '!' videoconvert '!' fdsink

2.Log:
========================================================================
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /opt/X11R7/lib/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /opt/X11R7/lib/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
0:00:00.439715983 24695      0x2227d40 ERROR            vaapidecode
gstvaapidecode.c:1103:gst_vaapidecode_parse_frame: parse error -1
0:00:00.439793564 24695      0x2227d40 ERROR            vaapidecode
gstvaapidecode.c:1103:gst_vaapidecode_parse_frame: parse error -1
ERROR: from element
/GstPipeline:pipeline0/GstVaapiDecode_h264:vaapidecode_h264-0: No valid frames
decoded before end of stream
Additional debug info:
gstvideodecoder.c(1176): gst_video_decoder_sink_event_default ():
/GstPipeline:pipeline0/GstVaapiDecode_h264:vaapidecode_h264-0:
no valid frames found
ERROR: pipeline doesn't want to preroll.


3. Testing Env:
========================================================================
gst_plugins_vaapi: (master)d7231f66ccd7b460c3465c4fdff6694813397114
libva:               (master)c4f37b5dc9f092f68a793c52ea169092f0ad6e44
Libva_intel_driver:  (master)db93c4020d9b0aca8472f772e91570a641983c66

4. Frequency of Occurence:
========================================================================
100%

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