fate/matroska: Add test for remuxing VP8 with alpha

This provides coverage for writing BlockGroups with BlockAdditional
and ReferenceBlock elements. It also tests setting the hearing impaired
disposition (it fits given that this video has no audio so one needs to
be able to read lips to understand anything).

Reviewed-by: Ridley Combs <rcombs@rcombs.me>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

tests/fate/matroska.mak

@@ -90,6 +90,16 @@ FATE_MATROSKA_FFMPEG_FFPROBE-$(call ALLYES, FILE_PROTOCOL MXF_DEMUXER        \
                                += fate-matroska-mastering-display-metadata
 fate-matroska-mastering-display-metadata: CMD = transcode mxf $(TARGET_SAMPLES)/mxf/Meridian-Apple_ProResProxy-HDR10.mxf matroska "-map 0 -map 0:0 -c:v:0 copy -c:v:1 ffv1 -c:a:0 copy -bsf:a:0 noise=amount=3 -filter:a:1 aresample -c:a:1 pcm_s16be -bsf:a:1 noise=dropamount=4" "-map 0 -c copy" "" "-show_entries stream_side_data_list:stream=index,codec_name"
 
+# Tests writing BlockAdditional and BlockGroups with ReferenceBlock elements;
+# it also tests setting a track as suitable for hearing impaired.
+# It also tests the capability of the VP8 parser to set the keyframe flag
+# (the input file lacks ReferenceBlock elements making everything a keyframe).
+FATE_MATROSKA_FFMPEG_FFPROBE-$(call ALLYES, FILE_PROTOCOL MATROSKA_DEMUXER \
+                                            VP8_PARSER MATROSKA_MUXER      \
+                                            FRAMECRC_MUXER PIPE_PROTOCOL)  \
+                               += fate-matroska-vp8-alpha-remux
+fate-matroska-vp8-alpha-remux: CMD = transcode matroska $(TARGET_SAMPLES)/vp8_alpha/vp8_video_with_alpha.webm matroska "-c copy -disposition +hearing_impaired -cluster_size_limit 100000" "-c copy -t 0.2" "" "-show_entries stream_disposition:stream_side_data_list"
+
 FATE_MATROSKA_FFPROBE-$(call ALLYES, MATROSKA_DEMUXER) += fate-matroska-spherical-mono
 fate-matroska-spherical-mono: CMD = run ffprobe$(PROGSSUF)$(EXESUF) -show_entries stream_side_data_list -select_streams v -v 0 $(TARGET_SAMPLES)/mkv/spherical.mkv
 

tests/ref/fate/matroska-vp8-alpha-remux

@@ -0,0 +1,33 @@
+d06be833da8e8d9d00bf334e0dfe8a58 *tests/data/fate/matroska-vp8-alpha-remux.matroska
+237192 tests/data/fate/matroska-vp8-alpha-remux.matroska
+#tb 0: 1/1000
+#media_type 0: video
+#codec_id 0: vp8
+#dimensions 0: 320x213
+#sar 0: 1/1
+0,          0,          0,       33,     2108, 0x59b92a34, S=2,     1900, 0x8fb3adc5,       12, 0x00000000
+0,         32,         32,       33,      142, 0x2f2a3fed, F=0x0, S=1,      160, 0xa13346af
+0,         65,         65,       33,      157, 0x17804767, F=0x0, S=1,      209, 0x64115f15
+0,         99,         99,       33,      206, 0x537262ca, F=0x0, S=1,      317, 0x44a09dd0
+0,        132,        132,       33,      259, 0x73ff74b6, F=0x0, S=1,      384, 0x2ee2c588
+0,        165,        165,       33,      320, 0x0fcf8ce4, F=0x0, S=1,      415, 0xff68c953
+0,        199,        199,       33,      377, 0x8fffb5f5, F=0x0, S=1,      475, 0x4166f3eb
+[STREAM]
+DISPOSITION:default=1
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=1
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+[SIDE_DATA]
+side_data_type=Stereo 3D
+type=2D
+inverted=0
+[/SIDE_DATA]
+[/STREAM]