When I try converting mkv to mp4 using ffmpeg, the following error occurs:
  [ipod @ 0x16fa0a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: -2 = -2 av_interleaved_write_frame(): Invalid argument
I used this command to convert the file:
ffmpeg -i input.mkv -vcodec copy -acodec copy -absf aac_adtstoasc 
output.m4v
The input file has the following characteristics:
mediainfo input.mkv 
  General
  
  Unique ID                                : 200459305952356554213392832683163418790 (0x96CF0ED8DB5914CBB9E18163689280A6)
  Complete name                            : input.mkv
  Format                                   : Matroska
  Format version                           : Version 2
  File size                                : 1.46 GiB
  Duration                                 : 1h 5mn
  Overall bit rate                         : 3 168 Kbps
  Encoded date                             : UTC 2010-09-26 21:44:02
  Writing application                      : mkvmerge v2.9.5 ('Tu es le seul') built on Jun 17 2009 16:28:30
  Writing library                          : libebml v0.7.8 + libmatroska v0.8.1  
  
  Video
  ID                                       : 1
  Format                                   : AVC
  Format/Info                              : Advanced Video Codec
  Format profile                           : 
[email protected]
  Format settings, CABAC                   : Yes
  Format settings, ReFrames                : 4 frames
  Codec ID                                 : V_MPEG4/ISO/AVC
  Duration                                 : 1h 5mn
  Bit rate                                 : 2 910 Kbps
  Width                                    : 1 280 pixels
  Height                                   : 720 pixels
  Display aspect ratio                     : 16:9
  Frame rate                               : 25.000 fps
  Color space                              : YUV
  Chroma subsampling                       : 4:2:0
  Bit depth                                : 8 bits
  Scan type                                : Progressive
  Bits/(Pixel*Frame)                       : 0.126
  Stream size                              : 1.31 GiB (90%)
  Writing library                          : x264 core 105 r1724 b02df7b
  Encoding settings                        : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=18 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc=2pass / mbtree=0 / bitrate=2910 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00  
  
  Default                                  : Yes
  Forced                                   : No  
  
  Audio
  ID                                       : 2
  Format                                   : AC-3
  Format/Info                              : Audio Coding 3
  Mode extension                           : CM (complete main)
  Codec ID                                 : A_AC3
  Duration                                 : 1h 5mn
  Bit rate mode                            : Constant
  Bit rate                                 : 256 Kbps
  Channel(s)                               : 2 channels
  Channel positions                        : Front: L R
  Sampling rate                            : 48.0 KHz
  Bit depth                                : 16 bits
  Compression mode                         : Lossy
  Stream size                              : 121 MiB (8%)
  Language                                 : English
  Default                                  : Yes
  Forced                                   : No  
Being new to ffmpeg, I'm not sure what the error means or how to correct it.
Thanks!