[FFmpeg-user] Non monotonic timestamp issues

[Stefano Sabatini]

On date Friday 2011-05-27 21:56:18 +0000, Jon Drukman encoded:
> I've got a .MOV file that I'm having a real bear of a time converting.  Here is
> the file:
> 
> http://tm-ami.s3.amazonaws.com/clip.mov
> 
> % ffmpeg -y -i clip.mov  -s 480x360 -vcodec libx264 -acodec libfaac clip.mp4
> ffmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers
>   built on Apr 25 2011 11:47:40 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
>   configuration: --enable-pthreads --enable-libfaac --enable-libmp3lame
> --enable-libx264 --enable-gpl --enable-nonfree --disable-network
> --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-version3
>   libavutil    51.  0. 0 / 51.  0. 0
>   libavcodec   53.  1. 0 / 53.  1. 0
>   libavformat  53.  0. 3 / 53.  0. 3
>   libavdevice  53.  0. 0 / 53.  0. 0
>   libavfilter   2.  0. 0 /  2.  0. 0
>   libswscale    0. 13. 0 /  0. 13. 0
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'clip.mov':
>   Metadata:
>     major_brand     : qt  
>     minor_version   : 0
>     compatible_brands: qt  
>     creation_time   : 2011-05-22 00:47:28
>   Duration: 00:01:32.94, start: 0.073946, bitrate: 5878 kb/s
>     Stream #0.0(und): Audio: pcm_s24le, 44100 Hz, 2 channels, s32, 2116 kb/s
>     Metadata:
>       creation_time   : 2011-05-22 00:47:28
>     Stream #0.1(und): Video: mjpeg, yuvj420p, 640x480 [PAR 72:72 DAR 4:3], 3684
> kb/s, 14.51 fps, 30k tbr, 30k tbn, 30k tbc
>     Metadata:
>       creation_time   : 2011-05-22 00:47:28
> Incompatible sample format 's32' for codec 'libfaac', auto-selecting format 's16'
> [buffer @ 0x1010037e0] w:640 h:480 pixfmt:yuvj420p
> [scale @ 0x101003b20] w:640 h:480 fmt:yuvj420p -> w:480 h:360 fmt:yuvj420p
> flags:0xa0000004
> [libx264 @ 0x101829a00] Default settings detected, using medium profile
> [libx264 @ 0x101829a00] using SAR=1/1
> [libx264 @ 0x101829a00] MB rate (20700000) > level limit (983040)
> [libx264 @ 0x101829a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle
> SSE4.2
> [libx264 @ 0x101829a00] profile High, level 5.1
> [libx264 @ 0x101829a00] 264 - core 104 - H.264/MPEG-4 AVC codec - Copyleft
> 2003-2010 - 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=1.00:0.00
> mixed_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 sliced_threads=0 nr=0 decimate=1
> interlaced=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0
> direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40
> intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=200 ratetol=1.0
> qcomp=0.60 qpmin=10 qpmax=51 qpstep=4 ip_ratio=1.40 aq=1:1.00
> Output #0, mp4, to 'clip.mp4':
>   Metadata:
>     major_brand     : qt  
>     minor_version   : 0
>     compatible_brands: qt  
>     creation_time   : 2011-05-22 00:47:28
>     encoder         : Lavf53.0.3
>     Stream #0.0(und): Video: libx264, yuvj420p, 480x360 [PAR 1:1 DAR 4:3],
> q=2-31, 200 kb/s, 30k tbn, 30k tbc
>     Metadata:
>       creation_time   : 2011-05-22 00:47:28
>     Stream #0.1(und): Audio: libfaac, 44100 Hz, 2 channels, s16, 64 kb/s
>     Metadata:
>       creation_time   : 2011-05-22 00:47:28
> Stream mapping:
>   Stream #0.1 -> #0.0
>   Stream #0.0 -> #0.1
> Press [q] to stop encoding
> frame= 4327 fps=222 q=51.0 size=     118kB time=0.14 bitrate=6780.1kbits/s
> dup=4325 drop=0    
> 
> 
> With these settings, it takes forever to encode.  It's only a 90 second clip but
> I gave up waiting for the encode after a few hours.  Also notice the really high
> number of 'dups'.
> 
> I tried setting vsync to 0 but ffmpeg aborts almost immediately with:
> 
> [mp4 @ 0x101829400] Application provided invalid, non monotonically increasing
> dts to muxer in stream 0: 2218 >= 2218
> av_interleaved_write_frame(): Invalid argument
> 
> I tried converting the same clip with Handbrake and it took a few seconds on my
> laptop (MacBook Pro, 4 cores).
> 
> Anybody got any ideas how to make ffmpeg play happily with this file?

This is a long standing issue, you can apply some of non-optimal
patches in this thread:
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/129918/focus=130054
-- 
ffmpeg-user random tip #19
X11 session recording with ffmpeg:
ffmpeg -f oss -i /dev/audio -f x11grab -s $WIDTHx$HEIGHT -r 5 -i :0.0 \
    x11-session.avi
Use xdpyinfo to get WIDTH and HEIGHT values.