[Bug 796042] New: avviddec: Support draining for some decoders

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796042

            Bug ID: 796042
           Summary: avviddec: Support draining for some decoders
    Classification: Platform
           Product: GStreamer
           Version: 1.14.0
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-libav
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: gingerbk247 at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 371951
  --> https://bugzilla.gnome.org/attachment.cgi?id=371951&action=edit
avviddec: Support draining for some decoders

Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input
and output.

It means that for some packets they will not immediately produce decoded output
and need to be flushed at the end of decoding to get all the decoded data.

However, even if AV_CODEC_CAP_DELAY is not set, there are decoders that need to
be flushed if they work on multi-threads.

I experienced that the frame is not drained when I using the ffmpeg native PNG
decoder.

e.g.
gst-launch-1.0 filesrc location="png file location" ! pngparse ! avdec_png !
autovideoconvert

gst-play-1.0 "png file location"


Note.)
If you use ffmpeg native PNG decoder and set the thread_count to 1 in codecCtx,
decoding will be done without draining. So you must be set thread_count more
than 1 to test.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.