From: [email protected]
To: [email protected]
Subject: mp4 encode 1 frame out of sync
Date: Fri, 15 Jan 2016 13:09:54 +0000
Hi, I am encoding a Quicktime Prores file to mp4 using the below settings. In
the resulting file, the audio is 1 frame out of sync, audio comes in 1 frame
early, cutting off the first frame and adding 1 silent frame to the end (see
attached screen grab)."F:\ffmpeg
copy\ffmpeg-20160115-git-b58cfa6-win32-static\ffmpeg-20160115-git-b58cfa6-win32-static\bin\ffmpeg.exe"
-i small_test.mov -c:v libx264 -crf 23 -preset medium -vsync 1 -pix_fmt
yuv420p -c:a aac -strict -2 -b:a 128k -y"\\10.0.1.103\Studio Canal
1_1\KEVS_TEMP\small_test.mp4" -report
And here is the output:"F:\ffmpeg
copy\ffmpeg-20160115-git-b58cfa6-win32-static\ffmpeg-20160115-git-b58cfa6-win32-static\bin\ffmpeg.exe"
-i small_test.mov -c:v libx264 -crf 23 -preset medium -vsync 1 -pix_fmt
yuv420p -c:a aac -strict -2 -b:a 128k -y"\\10.0.1.103\Studio Canal
1_1\KEVS_TEMP\small_test.mp4" -report
ffmpeg started on 2016-01-15 at 12:54:22
Report written to "ffmpeg-20160115-125422.log"
ffmpeg version N-77870-gb58cfa6 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.2.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype
--enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger
--enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 13.100 / 55. 13.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 24.100 / 6. 24.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0029ea60] ignoring 'frma' atom of 'in24', stream
format is 'in24'
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'small_test.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2016-01-15 11:40:41
com.apple.finalcutstudio.media.uuid: 3BA55888-679C-4D73-8159-6EBA831BB0EC
com.apple.quicktime.player.movie.audio.gain: 1.000000
com.apple.quicktime.player.movie.audio.treble: 0.000000
com.apple.quicktime.player.movie.audio.bass: 0.000000
com.apple.quicktime.player.movie.audio.balance: 0.000000
com.apple.quicktime.player.movie.audio.pitchshift: 0.000000
com.apple.quicktime.player.movie.audio.mute:
com.apple.quicktime.player.movie.visual.brightness: 0.000000
com.apple.quicktime.player.movie.visual.color: 1.000000
com.apple.quicktime.player.movie.visual.tint: 0.000000
com.apple.quicktime.player.movie.visual.contrast: 1.000000
com.apple.quicktime.player.version: 7.6.6 (7.6.6)
com.apple.quicktime.version: 7.7.3 (2943) 0x7738000 (Mac OS X, 10.11.2,
15C50)
timecode : 00:00:00:00
Duration: 00:00:05.01, start: 0.000000, bitrate: 183947 kb/s
Stream #0:0(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo,
s32 (24 bit), 2304 kb/s (default)
Metadata:
creation_time : 2016-01-15 11:40:41
handler_name : Apple Alias Data Handler
Stream #0:1(eng): Data: none (tmcd / 0x64636D74) (default)
Metadata:
creation_time : 2016-01-15 11:40:41
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Stream #0:2(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709),
1920x1080, 174712 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn,
23976 tbc (default)
Metadata:
creation_time : 2016-01-15 11:44:53
handler_name : Apple Alias Data Handler
encoder : Apple ProRes 422 HQ
timecode : 00:00:00:00
[libx264 @ 00a1b0e0] using SAR=1/1
[libx264 @ 00a1b0e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
LZCNT
[libx264 @ 00a1b0e0] profile High, level 4.0
[libx264 @ 00a1b0e0] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec -
Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1
psy_rd=1.00:0.00mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0
deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 lookahead_threads=1
sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0
constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1b_bias=0 direct=1 weightb=1
open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0
rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4
ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '\\10.0.1.103\Studio Canal 1_1\KEVS_TEMP\small_test.mp4':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
timecode : 00:00:00:00
com.apple.finalcutstudio.media.uuid: 3BA55888-679C-4D73-8159-6EBA831BB0EC
com.apple.quicktime.player.movie.audio.gain: 1.000000
com.apple.quicktime.player.movie.audio.treble: 0.000000
From: cehoyos at ag.or.at
To: [email protected]
Subject: mp4 encode 1 frame out of sync
How do you test this issue?
Is it only reproducible with x264 or also with
-vcodec mpeg4 -qscale 2?
Carl Eugen--------------------------Sorry, about the formatting, I had to
cobble this email together.I am testing this by opening the original file and
the ffmpeg encoded file in Final Cut Pro and viewing them on the timeline.I
tested with -vcodec mpeg4 -qscale 2, and got the same result, I have attached
the a screen grab of that encode. As you can see I have had to shift the ffmpeg
encoded audio by 1 frame to get it back into sync.Kind regards.
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