[FFmpeg-trac] #4990(avfilter:reopened): fieldmatch+decimate duplicate frames with yuv

FFmpeg trac at avcodec.org
Wed Aug 31 18:16:02 EEST 2016


#4990: fieldmatch+decimate duplicate frames with yuv
------------------------------------+------------------------------------
             Reporter:  nullb       |                    Owner:
                 Type:  defect      |                   Status:  reopened
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:  pullup      |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
------------------------------------+------------------------------------

Comment (by cehoyos):

 In the first block of five frames, the fifth frame should be dropped, but
 the first frame is dropped instead:
 {{{
 $ ffmpeg -loglevel 50 -i fieldmatched.avi -vf decimate -f null -
 ffmpeg version N-81500-ga648391 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 29.100 / 55. 29.100
   libavcodec     57. 54.101 / 57. 54.101
   libavformat    57. 48.101 / 57. 48.101
   libavdevice    57.  0.102 / 57.  0.102
   libavfilter     6. 58.100 /  6. 58.100
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  1.100 /  2.  1.100
   libpostproc    54.  0.100 / 54.  0.100
 Splitting the commandline.
 Reading option '-loglevel' ... matched as option 'loglevel' (set logging
 level) with argument '50'.
 Reading option '-i' ... matched as input file with argument
 'fieldmatched.avi'.
 Reading option '-vf' ... matched as option 'vf' (set video filters) with
 argument 'decimate'.
 Reading option '-f' ... matched as option 'f' (force format) with argument
 'null'.
 Reading option '-' ... matched as output file.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option loglevel (set logging level) with argument 50.
 Successfully parsed a group of options.
 Parsing a group of options: input file fieldmatched.avi.
 Successfully parsed a group of options.
 Opening an input file: fieldmatched.avi.
 [file @ 0x1fcbd20] Setting default whitelist 'file,crypto'
 [avi @ 0x1fcb400] Format avi probed with size=2048 and score=100
 [avi @ 0x1fcbda0] use odml:1
 [avi @ 0x1fcb400] Before avformat_find_stream_info() pos: 5720 bytes
 read:98952 seeks:4 nb_streams:1
 [avi @ 0x1fcb400] parser not found for codec ffv1, packets or times may be
 invalid.
     Last message repeated 1 times
 [avi @ 0x1fcb400] All info found
 [avi @ 0x1fcb400] After avformat_find_stream_info() pos: 635993 bytes
 read:696457 seeks:4 frames:1
 Input #0, avi, from 'fieldmatched.avi':
   Metadata:
     encoder         : Lavf57.20.100
   Duration: 00:00:00.67, start: 0.000000, bitrate: 123059 kb/s
     Stream #0:0, 1, 1001/30000: Video: ffv1, 1 reference frame (FFV1 /
 0x31564646), yuv420p, 1920x1080, 0/1, 129457 kb/s, 29.97 fps, 29.97 tbr,
 29.97 tbn, 29.97 tbc
 Successfully opened the file.
 Parsing a group of options: output file -.
 Applying option vf (set video filters) with argument decimate.
 Applying option f (force format) with argument null.
 Successfully parsed a group of options.
 Opening an output file: -.
 Successfully opened the file.
 detected 8 logical cores
 [graph 0 input from stream 0:0 @ 0x1fd0060] Setting 'video_size' to value
 '1920x1080'
 [graph 0 input from stream 0:0 @ 0x1fd0060] Setting 'pix_fmt' to value '0'
 [graph 0 input from stream 0:0 @ 0x1fd0060] Setting 'time_base' to value
 '1001/30000'
 [graph 0 input from stream 0:0 @ 0x1fd0060] Setting 'pixel_aspect' to
 value '0/1'
 [graph 0 input from stream 0:0 @ 0x1fd0060] Setting 'sws_param' to value
 'flags=2'
 [graph 0 input from stream 0:0 @ 0x1fd0060] Setting 'frame_rate' to value
 '30000/1001'
 [graph 0 input from stream 0:0 @ 0x1fd0060] w:1920 h:1080 pixfmt:yuv420p
 tb:1001/30000 fr:30000/1001 sar:0/1 sws_param:flags=2
 [AVFilterGraph @ 0x1fd0220] query_formats: 3 queried, 2 merged, 0 already
 done, 0 delayed
 [Parsed_decimate_0 @ 0x1fd1100] FPS: 30000/1001 -> 24000/1001
 [null @ 0x1fce1c0] Using AVStream.codec to pass codec parameters to muxers
 is deprecated, use AVStream.codecpar instead.
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf57.48.101
     Stream #0:0, 0, 1001/24000: Video: wrapped_avframe, 1 reference frame,
 yuv420p, 1920x1080, 0/1, q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc
     Metadata:
       encoder         : Lavc57.54.101 wrapped_avframe
 Stream mapping:
   Stream #0:0 -> #0:0 (ffv1 (native) -> wrapped_avframe (native))
 Press [q] to stop, [?] for help
 cur_dts is invalid (this is harmless if it occurs once at the start per
 stream)
     Last message repeated 11 times
 [Parsed_decimate_0 @ 0x1fd1100] 1/5 frame drop:
 [Parsed_decimate_0 @ 0x1fd1100]   #1: totdiff=7fffffffffffffff
 maxbdiff=7fffffffffffffff sc [DROP]
 [Parsed_decimate_0 @ 0x1fd1100]   #2: totdiff=00ca660c maxbdiff=000130d8
 [Parsed_decimate_0 @ 0x1fd1100]   #3: totdiff=015715f3 maxbdiff=00022e12
 [Parsed_decimate_0 @ 0x1fd1100]   #4: totdiff=00c6e459 maxbdiff=0001df5b
 [Parsed_decimate_0 @ 0x1fd1100]   #5: totdiff=000d4fce maxbdiff=00000d05
 lowest
 [Parsed_decimate_0 @ 0x1fd1100] 1/5 frame drop:
 [Parsed_decimate_0 @ 0x1fd1100]   #1: totdiff=0093eda5 maxbdiff=0001b481
 [Parsed_decimate_0 @ 0x1fd1100]   #2: totdiff=0089d968 maxbdiff=00019ebc
 [Parsed_decimate_0 @ 0x1fd1100]   #3: totdiff=0080a999 maxbdiff=00017223
 [Parsed_decimate_0 @ 0x1fd1100]   #4: totdiff=007c98d0 maxbdiff=00018261
 [Parsed_decimate_0 @ 0x1fd1100]   #5: totdiff=00099bf0 maxbdiff=00000f6b
 lowest [DROP]
 [Parsed_decimate_0 @ 0x1fd1100] 1/5 frame drop:
 [Parsed_decimate_0 @ 0x1fd1100]   #1: totdiff=0079855c maxbdiff=0001ab54
 [Parsed_decimate_0 @ 0x1fd1100]   #2: totdiff=008401c0 maxbdiff=0001bf8e
 [Parsed_decimate_0 @ 0x1fd1100]   #3: totdiff=007db8bb maxbdiff=0001ade7
 [Parsed_decimate_0 @ 0x1fd1100]   #4: totdiff=007f553c maxbdiff=0001806d
 [Parsed_decimate_0 @ 0x1fd1100]   #5: totdiff=0010b14d maxbdiff=00001d9a
 lowest [DROP]
 [Parsed_decimate_0 @ 0x1fd1100] 1/5 frame drop:
 [Parsed_decimate_0 @ 0x1fd1100]   #1: totdiff=007b5d19 maxbdiff=0001691f
 [Parsed_decimate_0 @ 0x1fd1100]   #2: totdiff=0076c12d maxbdiff=00012a61
 [Parsed_decimate_0 @ 0x1fd1100]   #3: totdiff=006cc5ab maxbdiff=00014404
 [Parsed_decimate_0 @ 0x1fd1100]   #4: totdiff=005b2dca maxbdiff=0000e7ce
 [Parsed_decimate_0 @ 0x1fd1100]   #5: totdiff=000fe7bc maxbdiff=0000150d
 lowest [DROP]
 [Parsed_decimate_0 @ 0x1fd1100] 1/5 frame drop:
 [output stream 0:0 @ 0x1fd1d20] EOF on sink link output stream
 0:0:default.
 No more output streams to write to, finishing.
 frame=   16 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.70 bitrate=N/A
 speed=2.44x
 video:8kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 Input file #0 (fieldmatched.avi):
   Input stream #0:0 (video): 20 packets read (10258995 bytes); 20 frames
 decoded;
   Total: 20 packets (10258995 bytes) demuxed
 Output file #0 (pipe:):
   Output stream #0:0 (video): 16 frames encoded; 16 packets muxed (7808
 bytes);
   Total: 16 packets (7808 bytes) muxed
 20 frames successfully decoded, 0 decoding errors
 [AVIOContext @ 0x1fd4040] Statistics: 10325678 bytes read, 4 seeks
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4990#comment:5>
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