[FFmpeg-user] Copy of XAVC-L 50 produces jittery output and missing video frames
Barnett, Phillip
phillip.barnett at itn.co.uk
Tue Sep 14 18:31:52 EEST 2021
Ffplay indicates that the original clip has 306 frames, when played through. But the console says that the final count of frames for the alleged copy is 206, which does tend to confirm that the copy seems to be dropping every third frame. I have also done a MXFdump (from BBC bmx tools) for both files, and they do seem to be quite different, although I'm not totally sure that I'm interpreting them correctly. These are available along with the original file if someone wants to test my results. (We Transfer?)
-----Original Message-----
From: Barnett, Phillip
Sent: 14 September 2021 08:46
To: 'FFmpeg user questions' <ffmpeg-user at ffmpeg.org>
Subject: RE: Copy of XAVC-L 50 produces jittery output and missing video frames
One thing I also noted, that was odd - ffmpeg seems to think that the original video is 12.5fps ( Stream #0:0: Video: h264 (High 4:2:2), yuv422p10le(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 12.50 fps, 25 tbr, 25 tbn) rather than 50 Not sure what difference that would make.
Any ideas?
-----Original Message-----
From: Barnett, Phillip
Sent: 13 September 2021 10:41
To: FFmpeg user questions <ffmpeg-user at ffmpeg.org>
Subject: Copy of XAVC-L 50 produces jittery output and missing video frames
Hi,
I wonder if someone can shed light on what I’m doing wrong here? I am trying to make an exact copy of a Sony XAVC Long GOP 50 file (later I want to make a subclip of a section, but this is a necessary beginning)
The copies I make do not seem to be true copies – the motion is jittery, the file size is (slightly) smaller, and the framemd5 results shows oddities when compared side by side – every third video frame is dropped from the copy, and the other two are offset by one frame.
Eg if we look at the (first characters of)the hashes we see this
Frame Original Copy
0 a161… -
1 a76f… a161..
2 2f06… a76f …
3 ec60… -
4 512c… ec60…
5 c59d… 512c …
6 b239… -
7 0d0d… b239…
Any ideas what’s going on? I’ve tried with several versions of the exe, on Windows, including the latest git build from 2 days ago.
Many thanks
Phillip Barnett
Full, uncut console output of the encode of the copy follows.
C:\Users\barnettp>ffmpeg -i c:\XDROOT\Clip\728_0048.MXF -c copy -map 0 c:\XDROOT\Clip\728_0048_copy.mxf
ffmpeg version 2021-09-11-git-3e127b595a-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 10.3.0 (Rev5, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
libavutil 57. 5.100 / 57. 5.100
libavcodec 59. 7.103 / 59. 7.103
libavformat 59. 5.100 / 59. 5.100
libavdevice 59. 0.101 / 59. 0.101
libavfilter 8. 9.100 / 8. 9.100
libswscale 6. 1.100 / 6. 1.100
libswresample 4. 0.100 / 4. 0.100
libpostproc 56. 0.100 / 56. 0.100
Guessed Channel Layout for Input Stream #0.1 : mono
Guessed Channel Layout for Input Stream #0.2 : mono
Guessed Channel Layout for Input Stream #0.3 : mono
Guessed Channel Layout for Input Stream #0.4 : mono
Input #0, mxf, from 'c:\XDROOT\Clip\728_0048.MXF':
Metadata:
operational_pattern_ul: 060e2b34.04010101.0d010201.01010900
uid : 58f3390a-f1b8-1232-b09a-747a90929f67
generation_uid : 58f33914-f1b8-1232-89a0-747a90929f67
company_name : Sony
product_name : Mem
product_version : 2.00
product_uid : cede1104-8280-11de-8a39-08004678031c
modification_date: 2021-05-03T10:20:42.000000Z
material_package_umid: 0x060A2B340101010501010D431300000025BF586E379305D8747A90FFFE929F67
timecode : 00:27:18:04
Duration: 00:00:24.68, start: 0.000000, bitrate: 29188 kb/s
Stream #0:0: Video: h264 (High 4:2:2), yuv422p10le(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 12.50 fps, 25 tbr, 25 tbn
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:1: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:2: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:3: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:4: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:5: Data: none
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
data_type : vbi_vanc_smpte_436M
Output #0, mxf, to 'c:\XDROOT\Clip\728_0048_copy.mxf':
Metadata:
operational_pattern_ul: 060e2b34.04010101.0d010201.01010900
uid : 58f3390a-f1b8-1232-b09a-747a90929f67
generation_uid : 58f33914-f1b8-1232-89a0-747a90929f67
timecode : 00:27:18:04
material_package_umid: 0x060A2B340101010501010D431300000025BF586E379305D8747A90FFFE929F67
modification_date: 2021-05-03T10:20:42.000000Z
product_uid : cede1104-8280-11de-8a39-08004678031c
encoder : Lavf59.5.100
Stream #0:0: Video: h264 (High 4:2:2), yuv422p10le(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 12.50 fps, 25 tbr, 25 tbn
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:1: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:2: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:3: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:4: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
Stream #0:5: Data: none
Metadata:
file_package_umid: 0x060A2B340101010501010D431300000026BF586E379305D8747A90FFFE929F67
data_type : vbi_vanc_smpte_436M
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (copy)
Stream #0:3 -> #0:3 (copy)
Stream #0:4 -> #0:4 (copy)
Stream #0:5 -> #0:5 (copy)
Press [q] to stop, [?] for help
frame= 617 fps=0.0 q=-1.0 Lsize= 86932kB time=00:00:24.68 bitrate=28855.1kbits/s speed= 169x
video:70995kB audio:13882kB subtitle:0kB other streams:316kB global headers:0kB muxing overhead: 2.040302%
Framemd5 of the original clip (cut for brevity)
#format: frame checksums
#version: 2
#hash: MD5
#software: Lavf59.5.100
#tb 0: 1/25
#media_type 0: video
#codec_id 0: rawvideo
#dimensions 0: 1920x1080
#sar 0: 1/1
#tb 1: 1/48000
#media_type 1: audio
#codec_id 1: pcm_s16le
#sample_rate 1: 48000
#channel_layout 1: 4
#channel_layout_name 1: mono
#tb 2: 1/48000
#media_type 2: audio
#codec_id 2: pcm_s16le
#sample_rate 2: 48000
#channel_layout 2: 4
#channel_layout_name 2: mono
#tb 3: 1/48000
#media_type 3: audio
#codec_id 3: pcm_s16le
#sample_rate 3: 48000
#channel_layout 3: 4
#channel_layout_name 3: mono
#tb 4: 1/48000
#media_type 4: audio
#codec_id 4: pcm_s16le
#sample_rate 4: 48000
#channel_layout 4: 4
#channel_layout_name 4: mono
#tb 5: 1/25
#media_type 5: data
#codec_id 5: none
#stream#, dts, pts, duration, size, hash
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1, 0, 0, 1920, 3840, 7d10c1a67ac6eaddde940ac5522d7a74
2, 0, 0, 1920, 3840, 2f213f5190a0567f3242988443643bf4
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5, 0, 0, 1, 524, 4668139579c7934bc141b0e92c1d1db6
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2, 24960, 24960, 1920, 3840, 1b27b244a0cce3845ffd789b1cc8bce7
3, 24960, 24960, 1920, 3840, e6029014c668386d7e9a32724fd78784
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2, 26880, 26880, 1920, 3840, e3a51fbb9b11aa2e64cc5cfe6126f024
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0, 15, 15, 1, 8294400, 67ab95ae164ac77f6331ce0fb5daba04
Framemd5 of the copy (cut for brevity)
#format: frame checksums
#version: 2
#hash: MD5
#software: Lavf59.5.100
#tb 0: 1/25
#media_type 0: video
#codec_id 0: rawvideo
#dimensions 0: 1920x1080
#sar 0: 1/1
#tb 1: 1/48000
#media_type 1: audio
#codec_id 1: pcm_s16le
#sample_rate 1: 48000
#channel_layout 1: 4
#channel_layout_name 1: mono
#tb 2: 1/48000
#media_type 2: audio
#codec_id 2: pcm_s16le
#sample_rate 2: 48000
#channel_layout 2: 4
#channel_layout_name 2: mono
#tb 3: 1/48000
#media_type 3: audio
#codec_id 3: pcm_s16le
#sample_rate 3: 48000
#channel_layout 3: 4
#channel_layout_name 3: mono
#tb 4: 1/48000
#media_type 4: audio
#codec_id 4: pcm_s16le
#sample_rate 4: 48000
#channel_layout 4: 4
#channel_layout_name 4: mono
#tb 5: 1/25
#media_type 5: data
#codec_id 5: none
#stream#, dts, pts, duration, size, hash
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2, 0, 0, 1920, 3840, 2f213f5190a0567f3242988443643bf4
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5, 2, 2, 1, 524, 4668139579c7934bc141b0e92c1d1db6
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5, 4, 4, 1, 524, 4668139579c7934bc141b0e92c1d1db6
0, 5, 5, 1, 8294400, 512c25aeb19342fee2900de07a149c39
1, 9600, 9600, 1920, 3840, 414d7a58fad8be4aace142a02c4bb40e
2, 9600, 9600, 1920, 3840, bf98df4594ed2dae8b524138a9931166
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4, 9600, 9600, 1920, 3840, bf98df4594ed2dae8b524138a9931166
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0, 7, 7, 1, 8294400, b239b8d5c178897e07d088cd737ce7c9
1, 13440, 13440, 1920, 3840, 0650ffd375448f37defe154143af46a3
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0, 8, 8, 1, 8294400, 0d0d7c13ec26b6948cfc2e1f3d3e56cd
1, 15360, 15360, 1920, 3840, bfd74b79e6b3d5d73b0550d26edd2339
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5, 8, 8, 1, 524, 4668139579c7934bc141b0e92c1d1db6
1, 17280, 17280, 1920, 3840, 7253f613f6e6bc0e4722144f41679a19
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0, 10, 10, 1, 8294400, bc18a86f1bfc6c8fec2df828dea26481
1, 19200, 19200, 1920, 3840, 978e01ae429903db328a4e8e53505516
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5, 10, 10, 1, 524, 4668139579c7934bc141b0e92c1d1db6
0, 11, 11, 1, 8294400, 1ecd9542cc8846d3a4d75a53c3644b6b
1, 21120, 21120, 1920, 3840, 314608bcb8d69b5fa0a885f4479e80a9
2, 21120, 21120, 1920, 3840, aea2f3aae5c1e6f6fca0d894a91154ba
3, 21120, 21120, 1920, 3840, 314608bcb8d69b5fa0a885f4479e80a9
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5, 11, 11, 1, 524, 4668139579c7934bc141b0e92c1d1db6
1, 23040, 23040, 1920, 3840, f2335860aaca7bc603e9cbe9e0b5283f
2, 23040, 23040, 1920, 3840, cd8e2b4a5469318bca380e9013804d8c
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5, 12, 12, 1, 524, 4668139579c7934bc141b0e92c1d1db6
0, 13, 13, 1, 8294400, c63cb67c98b9fe785203295178db83f8
1, 24960, 24960, 1920, 3840, e6029014c668386d7e9a32724fd78784
2, 24960, 24960, 1920, 3840, 1b27b244a0cce3845ffd789b1cc8bce7
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4, 24960, 24960, 1920, 3840, 1b27b244a0cce3845ffd789b1cc8bce7
5, 13, 13, 1, 524, 4668139579c7934bc141b0e92c1d1db6
0, 14, 14, 1, 8294400, e781f626f62eee6d364e893d8d10a7f0
1, 26880, 26880, 1920, 3840, 93ba28f16439c408edf1ab701b9a4246
2, 26880, 26880, 1920, 3840, e3a51fbb9b11aa2e64cc5cfe6126f024
3, 26880, 26880, 1920, 3840, 93ba28f16439c408edf1ab701b9a4246
4, 26880, 26880, 1920, 3840, e3a51fbb9b11aa2e64cc5cfe6126f024
5, 14, 14, 1, 524, 4668139579c7934bc141b0e92c1d1db6
1, 28800, 28800, 1920, 3840, 94f40cff36e5c37ac9ff6350a0676be4
2, 28800, 28800, 1920, 3840, 4a74f81dd3d6d37ef4f44847bf362d84
3, 28800, 28800, 1920, 3840, 94f40cff36e5c37ac9ff6350a0676be4
4, 28800, 28800, 1920, 3840, 4a74f81dd3d6d37ef4f44847bf362d84
5, 15, 15, 1, 524, 4668139579c7934bc141b0e92c1d1db6
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