[FFmpeg-devel] [PATCH] mxfdec.c: prefer metadata from Footer

emcodem emcodem at ffastrans.com
Sat Jun 26 11:20:10 EEST 2021 

In case there is a Footer, regarding to SMPTE 377 all versions, the metadata in Footer shall be correct (where in Header it can be incomplete)..
If there is no footer (stream, truncated...) it will still work as usual.
Tested with a huge set of files and compared old/new ffprobes, it will not change lots of metadata, mainly duration and in some cases start timecode.
Without this change, especially Duration would be often inaccurate because it is unknown in header and calculated from bitrate.

The new sample files should be added to \fate-suite\mxf, as i do not have an account to upload the files, i shared them on wetransfer:

https://we.tl/t-MVmyG2mZHq

omneon_6.4.1.0.1_xdcam_truncated.mxf
An original Omneon File from an older Version, file is truncated. It shall prove that Metadata is being parsed even when there is no Footer.

omneon_8.3.0.0_xdcam_startc_footer.mxf
An original Omneon File from a recent Version with "better" Metadata in Footer than in Header. I needed to hexedit this file and set the MP and SP start timecode in header to 0. 
This test is for proving that metadata from Footer is preferred.

---
 libavformat/mxfdec.c                      |   2 +-
 tests/fate/mxf.mak                        |  10 +
 tests/ref/fate/mxf-probe-xdcamhd-oit      | 442 ++++++++++++++++++++++
 tests/ref/fate/mxf-probe-xdcamhd-tcfooter | 442 ++++++++++++++++++++++
 4 files changed, 895 insertions(+), 1 deletion(-)
 create mode 100644 tests/ref/fate/mxf-probe-xdcamhd-oit
 create mode 100644 tests/ref/fate/mxf-probe-xdcamhd-tcfooter

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 7b40076fb4..a7f552c753 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1402,7 +1402,7 @@ static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMe
 
     if (!strong_ref)
         return NULL;
-    for (i = 0; i < mxf->metadata_sets_count; i++) {
+    for (i = mxf->metadata_sets_count-1; i >= 0; i--) {
         if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
             (type == AnyType || mxf->metadata_sets[i]->type == type)) {
             return mxf->metadata_sets[i];
diff --git a/tests/fate/mxf.mak b/tests/fate/mxf.mak
index 3a1096176f..1b7be46c64 100644
--- a/tests/fate/mxf.mak
+++ b/tests/fate/mxf.mak
@@ -37,6 +37,16 @@ FATE_MXF_PROBE-$(call ENCDEC2, PRORES, PCM_S24LE, MXF) += fate-mxf-probe-applehd
 fate-mxf-probe-applehdr10: SRC = $(TARGET_SAMPLES)/mxf/Meridian-Apple_ProResProxy-HDR10.mxf
 fate-mxf-probe-applehdr10: CMD = run $(PROBE_FORMAT_STREAMS_COMMAND) -i "$(SRC)" | sed -e "s/yuv422p10../yuv422p10/"
 
+# openincomplete Header, truncated
+FATE_MXF_PROBE-$(call ENCDEC2, MPEG2VIDEO, PCM_S16LE, MXF) += fate-mxf-probe-xdcamhd-oit
+fate-mxf-probe-xdcamhd-oit: SRC = $(TARGET_SAMPLES)/mxf/omneon_6.4.1.0.1_xdcam_truncated.mxf
+fate-mxf-probe-xdcamhd-oit: CMD = run $(PROBE_FORMAT_STREAMS_COMMAND) -i "$(SRC)"
+
+# openincomplete Header, starttc in header 0 but Footer MP 10:11:17:21, SP 10:11:17:17
+FATE_MXF_PROBE-$(call ENCDEC2, MPEG2VIDEO, PCM_S24LE, MXF) += fate-mxf-probe-xdcamhd-tcfooter
+fate-mxf-probe-xdcamhd-tcfooter: SRC = $(TARGET_SAMPLES)/mxf/omneon_8.3.0.0_xdcam_startc_footer.mxf
+fate-mxf-probe-xdcamhd-tcfooter: CMD = run $(PROBE_FORMAT_STREAMS_COMMAND) -i "$(SRC)"
+
 FATE_MXF_REEL_NAME-$(call ENCDEC2, MPEG2VIDEO, PCM_S16LE, MXF) += fate-mxf-reel_name
 fate-mxf-reel_name: $(SAMPLES)/mxf/Sony-00001.mxf
 fate-mxf-reel_name: CMD = md5 -y -i $(TARGET_SAMPLES)/mxf/Sony-00001.mxf  -c copy -timecode 00:00:00:00 -metadata "reel_name=test_reel" -fflags +bitexact -f mxf
diff --git a/tests/ref/fate/mxf-probe-xdcamhd-oit b/tests/ref/fate/mxf-probe-xdcamhd-oit
new file mode 100644
index 0000000000..040a4e0fba
--- /dev/null
+++ b/tests/ref/fate/mxf-probe-xdcamhd-oit
@@ -0,0 +1,442 @@
+[STREAM]
+index=0
+codec_name=mpeg2video
+profile=0
+codec_type=video
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+width=1920
+height=1080
+coded_width=0
+coded_height=0
+closed_captions=0
+has_b_frames=1
+sample_aspect_ratio=1:1
+display_aspect_ratio=16:9
+pix_fmt=yuv422p
+level=2
+color_range=tv
+color_space=unknown
+color_transfer=bt709
+color_primaries=unknown
+chroma_location=topleft
+field_order=tt
+refs=1
+id=N/A
+r_frame_rate=25/1
+avg_frame_rate=25/1
+time_base=1/25
+start_pts=0
+start_time=0.000000
+duration_ts=6
+duration=0.240000
+bit_rate=50000000
+max_bit_rate=N/A
+bits_per_raw_sample=N/A
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[SIDE_DATA]
+side_data_type=CPB properties
+max_bitrate=50000000
+min_bitrate=0
+avg_bitrate=0
+buffer_size=12484608
+vbv_delay=-1
+[/SIDE_DATA]
+[/STREAM]
+[STREAM]
+index=1
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[STREAM]
+index=2
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[STREAM]
+index=3
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[STREAM]
+index=4
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[STREAM]
+index=5
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[STREAM]
+index=6
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[STREAM]
+index=7
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[STREAM]
+index=8
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=11596
+duration=0.241583
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D2313003E792039C0579AD9E111BAFB00D028113D2C
+[/STREAM]
+[FORMAT]
+format_name=mxf
+duration=0.241583
+bit_rate=59674662
+TAG:operational_pattern_ul=060e2b34.04010101.0d010201.01010900
+TAG:uid=8033c057-9ad9-e111-aa7e-00d028113d2c
+TAG:generation_uid=9433c057-9ad9-e111-96cf-00d028113d2c
+TAG:company_name=Omneon Inc.
+TAG:product_name=Omneon Media Subsystem
+TAG:modification_date=2012-07-29T16:27:51.820000Z
+TAG:product_version=6.4.1.0.release
+TAG:product_version_num=6.4.1.0.1
+TAG:application_platform=Omneon Media Api (mqx)    
+TAG:product_uid=00000000-0000-0010-8000-050e0b010602
+TAG:material_package_umid=0x060A2B340101010501010D2313001BDF4438C0579AD9E1119C8800D028113D2C
+TAG:timecode=18:27:53:21
+[/FORMAT]
diff --git a/tests/ref/fate/mxf-probe-xdcamhd-tcfooter b/tests/ref/fate/mxf-probe-xdcamhd-tcfooter
new file mode 100644
index 0000000000..710cf616b5
--- /dev/null
+++ b/tests/ref/fate/mxf-probe-xdcamhd-tcfooter
@@ -0,0 +1,442 @@
+[STREAM]
+index=0
+codec_name=mpeg2video
+profile=0
+codec_type=video
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+width=1920
+height=1080
+coded_width=0
+coded_height=0
+closed_captions=0
+has_b_frames=1
+sample_aspect_ratio=1:1
+display_aspect_ratio=16:9
+pix_fmt=yuv422p
+level=2
+color_range=tv
+color_space=bt709
+color_transfer=bt709
+color_primaries=bt709
+chroma_location=topleft
+field_order=tt
+refs=1
+id=N/A
+r_frame_rate=25/1
+avg_frame_rate=25/1
+time_base=1/25
+start_pts=0
+start_time=0.000000
+duration_ts=13
+duration=0.520000
+bit_rate=50000000
+max_bit_rate=N/A
+bits_per_raw_sample=N/A
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D231300114B920EA7CA8BBF1B1EAC7100D028113D5C
+[SIDE_DATA]
+side_data_type=CPB properties
+max_bitrate=50000000
+min_bitrate=0
+avg_bitrate=0
+buffer_size=17825792
+vbv_delay=-1
+[/SIDE_DATA]
+[/STREAM]
+[STREAM]
+index=1
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=24960
+duration=0.520000
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
+nb_read_packets=N/A
+DISPOSITION:default=0
+DISPOSITION:dub=0
+DISPOSITION:original=0
+DISPOSITION:comment=0
+DISPOSITION:lyrics=0
+DISPOSITION:karaoke=0
+DISPOSITION:forced=0
+DISPOSITION:hearing_impaired=0
+DISPOSITION:visual_impaired=0
+DISPOSITION:clean_effects=0
+DISPOSITION:attached_pic=0
+DISPOSITION:timed_thumbnails=0
+DISPOSITION:captions=0
+DISPOSITION:descriptions=0
+DISPOSITION:metadata=0
+DISPOSITION:dependent=0
+DISPOSITION:still_image=0
+TAG:file_package_umid=0x060A2B340101010501010D231300114B920EA7CA8BBF1B1EAC7100D028113D5C
+[/STREAM]
+[STREAM]
+index=2
+codec_name=pcm_s24le
+profile=unknown
+codec_type=audio
+codec_tag_string=[0][0][0][0]
+codec_tag=0x0000
+sample_fmt=s32
+sample_rate=48000
+channels=1
+channel_layout=unknown
+bits_per_sample=24
+id=N/A
+r_frame_rate=0/0
+avg_frame_rate=0/0
+time_base=1/48000
+start_pts=0
+start_time=0.000000
+duration_ts=24960
+duration=0.520000
+bit_rate=1152000
+max_bit_rate=N/A
+bits_per_raw_sample=24
+nb_frames=N/A
+nb_read_frames=N/A
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+[/STREAM]
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+TAG:application_platform=Omneon Media Api (mqx)    
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+TAG:timecode=10:11:17:21
+[/FORMAT]
-- 
2.17.1

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