[Bug 774150] New: video format changes after a few iterations and causes crash

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=774150

            Bug ID: 774150
           Summary: video format changes after a few iterations and causes
                    crash
    Classification: Platform
           Product: GStreamer
           Version: 1.0.0
                OS: Linux
            Status: NEW
          Severity: critical
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: henning.hinze at mail.de
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 339402
  --> https://bugzilla.gnome.org/attachment.cgi?id=339402&action=edit
source code

i set up a pipeline for mp4 video files like that:

filesrc -> decodebin -> videoconverter -> capsfilter ("video/x-raw,
format=RGB") -> appsink

and want to pull the samples from the video. after using gst_video_frame_map i
want to release the resources with gst_video_frame_unmap to prevent memory
leaking. however the program crashes with that output:

i could reproduce the error with this mp4 video:
https://archive.org/details/test177

video info format: RGB
video frame meta info: RGB
video info format: RGB
video frame meta info: RGB
video info format: RGB
video frame meta info: RGB
video info format: RGB
video frame meta info: I420

** (gst-gl:16312): CRITICAL **: gst_video_frame_map_id: assertion
'info->finfo->format == meta->format' failed

** (gst-gl:16312): CRITICAL **: gst_video_frame_map_id: assertion
'info->finfo->format == meta->format' failed

(gst-gl:16312): GStreamer-CRITICAL **: gst_buffer_unmap: assertion
'GST_IS_BUFFER (buffer)' failed

(gst-gl:16312): GStreamer-CRITICAL **: gst_mini_object_unref: assertion
'mini_object->refcount > 0' failed

** (gst-gl:16312): CRITICAL **: gst_video_frame_map_id: assertion
'GST_IS_BUFFER (buffer)' failed

(gst-gl:16312): GStreamer-CRITICAL **: gst_pad_push: assertion 'GST_IS_BUFFER
(buffer)' failed

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