Opened 3 years ago

Closed 22 months ago

Last modified 22 months ago

#8725 closed defect (invalid)

ffprobe microseconds rounding error

Reported by: markfilipak Owned by:
Priority: minor Component: ffprobe
Version: git-master Keywords:
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Summary of the bug:
For a 24/1.001 FPS video, ffprobe is reporting 'frames.frame.x.pkt_duration_time="0:00:00.041700"' instead of 'frames.frame.x.pkt_duration_time="0:00:00.041708"'. The rounding to microseconds is off.

How to reproduce:

% ffprobe -i input
ffmpeg version ffmpeg-20200610-9dfb19b-win64-static
built on 20200610

Change History (13)

comment:1 by Carl Eugen Hoyos, 3 years ago

Priority: normal → minor

Please provide the command line you tested together with the complete, uncut console output and attach an input sample to make this a valid ticket.

comment:2 by markfilipak, 3 years ago

I hope the problem (Priority) is "minor" and not a symptom of a deeper error.

The command line:
@ffprobe -hide_banner -sexagesimal -select_streams v -show_frames -of flat -read_intervals %%+#5404 -i %1 | FINDSTR /L "e.9 e.18 e.27 e.36 e.45 e.54" | FINDSTR /L "00.b 00.i 00.p 00.r 00.t 01.i 01.pkt_dur 01.r 01.t 02.i 02.pkt_dur 02.r 02.t 03.i 03.pkt_dur 03.r 03.t 04.i 04.pkt_dur 04.r 04.t" | FINDSTR /L "_time= _frame= _first= _pict=" & @ECHO. & CMD /K

Samples:
I could probably list every blu-ray movie I own. Pick any of these tested blu-ray movies:
A.I., Artificial Intelligence [2001] 097361244440
ALIEN [1979][2003] 024543711193
APOCALYPSE NOW [1979][2000] 031398126195
CAST AWAY [2000] 024543581734
DAS BOOT [1981] 043396451070
PATTON [1969] 024543835332
THE GODFATHER [1972] 097360756647
THE GOOD, THE BAD AND THE UGLY [1966] 883904362791
The Last Emperor [1987] 715515033725

PS: If you submit to the shell instead of in a script, change "%%+#5404" to "%+#5404" first.

Last edited 3 years ago by markfilipak (previous) (diff)

comment:3 by mkver, 3 years ago

Let me guess: Your input files are Matroska with a TimestampScale of 1000000 (i.e. ms precision)? (In this case the result you are seeing stems from the duration fields having ms precision (even when the container is able to specify a more precise duration via its DefaultDuration).)

in reply to:  3 comment:4 by markfilipak, 3 years ago

Replying to mkver:

Let me guess: Your input files are Matroska...

On a blu-ray disc? Hardly.

comment:5 by Carl Eugen Hoyos, 3 years ago

Resolution: → needs_more_info
Status: new → closed

Feel free to reopen this ticket if you can provide a command line without hide_banner including the complete, uncut console output and an input sample.

comment:6 by markfilipak, 3 years ago

Resolution: needs_more_info
Status: closed → reopened

The command line:
ffprobe -sexagesimal -select_streams v -show_frames -of flat -read_intervals %+#5404 -i 00000.m2ts | FINDSTR /L "e.9 e.18 e.27 e.36 e.45 e.54" | FINDSTR /L "00.b 00.i 00.p 00.r 00.t 01.i 01.pkt_dur 01.r 01.t 02.i 02.pkt_dur 02.r 02.t 03.i 03.pkt_dur 03.r 03.t 04.i 04.pkt_dur 04.r 04.t" | FINDSTR /L "_time= _frame= _first= _pict="

Output:
G:\BDMV\STREAM>ffprobe -sexagesimal -select_streams v -show_frames -of flat -read_intervals %+#5404 -i 00000.m2ts | FINDSTR /L "e.9 e.18 e.27 e.36 e.45 e.54" | FINDSTR /L "00.b 00.i 00.p 00.r 00.t 01.i 01.pkt_dur 01.r 01.t 02.i 02.pkt_dur 02.r 02.t 03.i 03.pkt_dur 03.r 03.t 04.i 04.pkt_dur 04.r 04.t" | FINDSTR /L "_time= _frame= _first= _pict=" & @ECHO. & CMD /K
ffprobe version git-2020-06-10-9dfb19b Copyright (c) 2007-2020 the FFmpeg developers

built with gcc 9.3.1 (GCC) 20200523
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
libavutil 56. 52.100 / 56. 52.100
libavcodec 58. 92.100 / 58. 92.100
libavformat 58. 46.101 / 58. 46.101
libavdevice 58. 11.100 / 58. 11.100
libavfilter 7. 86.100 / 7. 86.100
libswscale 5. 8.100 / 5. 8.100
libswresample 3. 8.100 / 3. 8.100
libpostproc 55. 8.100 / 55. 8.100

[mpegts @ 0000023139f00700] start time for stream 7 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] start time for stream 8 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] start time for stream 9 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] start time for stream 10 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] start time for stream 11 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] start time for stream 12 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] start time for stream 13 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] start time for stream 14 is not set in estimate_timings_from_pts
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 7 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 8 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 9 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 10 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 11 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 12 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 13 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0000023139f00700] Could not find codec parameters for stream 14 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from '00000.m2ts':

Duration: 02:57:09.12, start: 11.650667, bitrate: 36115 kb/s
Program 1

Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
Stream #0:1[0x1100]: Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), s32 (24 bit)
Stream #0:2[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s
Stream #0:3[0x1101]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:4[0x1102]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s
Stream #0:5[0x1103]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s
Stream #0:6[0x1104]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:7[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:8[0x1201]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:9[0x1202]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:10[0x1203]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:11[0x1204]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:12[0x1205]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:13[0x1206]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:14[0x1207]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)

frames.frame.900.pkt_pts_time="0:00:49.188167"
frames.frame.900.pkt_dts_time="0:00:49.313289"
frames.frame.900.best_effort_timestamp_time="0:00:49.188167"
frames.frame.900.pkt_duration_time="0:00:00.041700" <<<<<----- should be "0:00:00.041708"
frames.frame.900.interlaced_frame=0
frames.frame.900.top_field_first=0
frames.frame.900.repeat_pict=0
frames.frame.901.pkt_duration_time="0:00:00.041700"
frames.frame.901.interlaced_frame=0
frames.frame.901.top_field_first=0
frames.frame.901.repeat_pict=0
frames.frame.902.pkt_duration_time="0:00:00.041700"
frames.frame.902.interlaced_frame=0
frames.frame.902.top_field_first=0
frames.frame.902.repeat_pict=0
frames.frame.903.pkt_duration_time="0:00:00.041700"
frames.frame.903.interlaced_frame=0
frames.frame.903.top_field_first=0
frames.frame.903.repeat_pict=0
frames.frame.904.pkt_duration_time="0:00:00.041700"
frames.frame.904.interlaced_frame=0
frames.frame.904.top_field_first=0
frames.frame.904.repeat_pict=0
frames.frame.1800.pkt_pts_time="0:01:26.725667"
frames.frame.1800.pkt_dts_time="0:01:26.850789"
frames.frame.1800.best_effort_timestamp_time="0:01:26.725667"
frames.frame.1800.pkt_duration_time="0:00:00.041700"
frames.frame.1800.interlaced_frame=0
frames.frame.1800.top_field_first=0
frames.frame.1800.repeat_pict=0
frames.frame.1801.pkt_duration_time="0:00:00.041700"
frames.frame.1801.interlaced_frame=0
frames.frame.1801.top_field_first=0
frames.frame.1801.repeat_pict=0
frames.frame.1802.pkt_duration_time="0:00:00.041700"
frames.frame.1802.interlaced_frame=0
frames.frame.1802.top_field_first=0
frames.frame.1802.repeat_pict=0
frames.frame.1803.pkt_duration_time="0:00:00.041700"
frames.frame.1803.interlaced_frame=0
frames.frame.1803.top_field_first=0
frames.frame.1803.repeat_pict=0
frames.frame.1804.pkt_duration_time="0:00:00.041700"
frames.frame.1804.interlaced_frame=0
frames.frame.1804.top_field_first=0
frames.frame.1804.repeat_pict=0
frames.frame.2700.pkt_pts_time="0:02:04.263167"
frames.frame.2700.pkt_dts_time="0:02:04.388289"
frames.frame.2700.best_effort_timestamp_time="0:02:04.263167"
frames.frame.2700.pkt_duration_time="0:00:00.041700"
frames.frame.2700.interlaced_frame=0
frames.frame.2700.top_field_first=0
frames.frame.2700.repeat_pict=0
frames.frame.2701.pkt_duration_time="0:00:00.041700"
frames.frame.2701.interlaced_frame=0
frames.frame.2701.top_field_first=0
frames.frame.2701.repeat_pict=0
frames.frame.2702.pkt_duration_time="0:00:00.041700"
frames.frame.2702.interlaced_frame=0
frames.frame.2702.top_field_first=0
frames.frame.2702.repeat_pict=0
frames.frame.2703.pkt_duration_time="0:00:00.041700"
frames.frame.2703.interlaced_frame=0
frames.frame.2703.top_field_first=0
frames.frame.2703.repeat_pict=0
frames.frame.2704.pkt_duration_time="0:00:00.041700"
frames.frame.2704.interlaced_frame=0
frames.frame.2704.top_field_first=0
frames.frame.2704.repeat_pict=0
frames.frame.3600.pkt_pts_time="0:02:41.800667"
frames.frame.3600.pkt_dts_time="0:02:41.925789"
frames.frame.3600.best_effort_timestamp_time="0:02:41.800667"
frames.frame.3600.pkt_duration_time="0:00:00.041700"
frames.frame.3600.interlaced_frame=0
frames.frame.3600.top_field_first=0
frames.frame.3600.repeat_pict=0
frames.frame.3601.pkt_duration_time="0:00:00.041700"
frames.frame.3601.interlaced_frame=0
frames.frame.3601.top_field_first=0
frames.frame.3601.repeat_pict=0
frames.frame.3602.pkt_duration_time="0:00:00.041700"
frames.frame.3602.interlaced_frame=0
frames.frame.3602.top_field_first=0
frames.frame.3602.repeat_pict=0
frames.frame.3603.pkt_duration_time="0:00:00.041700"
frames.frame.3603.interlaced_frame=0
frames.frame.3603.top_field_first=0
frames.frame.3603.repeat_pict=0
frames.frame.3604.pkt_duration_time="0:00:00.041700"
frames.frame.3604.interlaced_frame=0
frames.frame.3604.top_field_first=0
frames.frame.3604.repeat_pict=0
frames.frame.4500.pkt_pts_time="0:03:19.338167"
frames.frame.4500.pkt_dts_time="0:03:19.463289"
frames.frame.4500.best_effort_timestamp_time="0:03:19.338167"
frames.frame.4500.pkt_duration_time="0:00:00.041700"
frames.frame.4500.interlaced_frame=0
frames.frame.4500.top_field_first=0
frames.frame.4500.repeat_pict=0
frames.frame.4501.pkt_duration_time="0:00:00.041700"
frames.frame.4501.interlaced_frame=0
frames.frame.4501.top_field_first=0
frames.frame.4501.repeat_pict=0
frames.frame.4502.pkt_duration_time="0:00:00.041700"
frames.frame.4502.interlaced_frame=0
frames.frame.4502.top_field_first=0
frames.frame.4502.repeat_pict=0
frames.frame.4503.pkt_duration_time="0:00:00.041700"
frames.frame.4503.interlaced_frame=0
frames.frame.4503.top_field_first=0
frames.frame.4503.repeat_pict=0
frames.frame.4504.pkt_duration_time="0:00:00.041700"
frames.frame.4504.interlaced_frame=0
frames.frame.4504.top_field_first=0
frames.frame.4504.repeat_pict=0
frames.frame.5400.pkt_pts_time="0:03:56.875667"
frames.frame.5400.pkt_dts_time="N/A"
frames.frame.5400.best_effort_timestamp_time="0:03:56.875667"
frames.frame.5400.pkt_duration_time="0:00:00.041700"
frames.frame.5400.interlaced_frame=0
frames.frame.5400.top_field_first=0
frames.frame.5400.repeat_pict=0
frames.frame.5401.pkt_duration_time="0:00:00.041700"
frames.frame.5401.interlaced_frame=0
frames.frame.5401.top_field_first=0
frames.frame.5401.repeat_pict=0
frames.frame.5402.pkt_duration_time="0:00:00.041700"
frames.frame.5402.interlaced_frame=0
frames.frame.5402.top_field_first=0
frames.frame.5402.repeat_pict=0
frames.frame.5403.pkt_duration_time="0:00:00.041700"
frames.frame.5403.interlaced_frame=0
frames.frame.5403.top_field_first=0
frames.frame.5403.repeat_pict=0

Samples: I can't provide samples because the input is copyrighted. Choose any M2TS movie file on a blu-ray disc in your possession.

Last edited 3 years ago by markfilipak (previous) (diff)

comment:7 by Elon Musk, 3 years ago

I highly suggest to immediately close this ticket under grounds that there is no will to share samples.

comment:8 by Balling, 3 years ago

What? Rounding error is +- 1. In least significant digit.

Last edited 3 years ago by Balling (previous) (diff)

comment:9 by Carl Eugen Hoyos, 3 years ago

Resolution: → needs_more_info
Status: reopened → closed

comment:10 by markfilipak, 3 years ago

What more information do you need, Carl Eugen?

And Balling is right. It's not a rounding error. If it was a rounding error, then there would be a +/- .000001 discrepancy -- 0:00:00.041708 would be 0:00:00.041707 or 0:00:00.041709. What I see is a whole digit ...gone. That's not rounding. That's something else.

comment:11 by Balling, 22 months ago

Resolution: needs_more_info
Status: closed → reopened

I can confirm that on WHITEOUT Blu-ray. It is VC1 actually, not even AVC (key frames are recognized correctly for VC1 in m2ts).
pkt.duration 3753 is indeed 3753/90000 == 0.041700

Then again, 3754 (remember that number is from DTS and PTS) /90000 == 0.0417111 which is too big.

So, I suppose DTS and PTS are not correctly applied for 24/1.001??? So I will reopen this, just in spite of all those crazy issues with CFR becoming VRF. Some more comments are needed here.

Last edited 22 months ago by Balling (previous) (diff)

comment:12 by Elon Musk, 22 months ago

Resolution: → invalid
Status: reopened → closed

comment:13 by Balling, 22 months ago

Here is the answer: ​https://superuser.com/a/1373512/1033761

Apparently to use both 3753 and 3754 is a bad idea. So...

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