MediaInfo: Frame Rate vs Original Frame Rate

[adalect]

Hi guys,

I am currently trying to convert a batch of MKV files into AVI files for compatibility with my DivX Player. In order to prevent frame-rate lag issues with the audio, I have to specify a frame rate when re-encoding the files (As you guys have taught me a long time ago).

Anyways, I am currently using MediaInfo to pinpoint to frame rate I should use and I get two frame rate numbers to choose from.

General
Complete name                    : L:\File1.mkv
Format                           : Matroska
File size                        : 149 MiB
Duration                         : 23mn 50s
Overall bit rate                 : 875 Kbps
Encoded date                     : UTC 2011-04-05 18:38:03
Writing application              : mkvmerge v4.0.0 ('The Stars were mine') built on Jun  6 2010 16:18:42
Writing library                  : libebml v1.0.0 + libmatroska v1.0.0
Cover                            : Yes

Video
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L3.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 8 frames
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 23mn 38s
Nominal bit rate                 : 750 Kbps
Width                            : 848 pixels
Height                           : 480 pixels
Display aspect ratio             : 16/9
Frame rate                       : 23.810 fps
Original frame rate              : 24.000 fps
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.077
Writing library                  : x264 core 98 r1629 2e81ce1
Encoding settings                : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=6 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / weightp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=750 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=1927 / vbv_bufsize=1927 / ip_ratio=1.40 / aq=1:0.50 / nal_hrd=none

Audio
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : A_AAC
Duration                         : 23mn 50s
Channel(s)                       : 2 channels
Channel positions                : L R
Sampling rate                    : 44.1 KHz
Resolution                       : 16 bits

Text
Format                           : ASS
Codec ID                         : S_TEXT/ASS
Codec ID/Info                    : Advanced Sub Station Alpha

Which frame rate should I use? Google hasn't been to kind to me when I was searching. I doubt re-encoding at 23.810fps or 24.000fps will make a big difference, but it's nice to know which is the correct approach.

[hello_hello]

The way I think it works...
The frame rate is written to the video stream and also at the container level. After you've remuxed video while changing the frame rate, MediaInfo displays the original frame rate written to the video stream as "original frame rate". The new frame rate, after remuxing the video while manually changing it during the process, is displayed as "frame rate".

If the video in question doesn't have audio sync issues, you'd want to use "frame rate".

How do you go about specifying a frame rate when encoding? 99.99% of the time it's probably not necessary.