Log explanation for interlaced input required

[ioncube]

Input movie:

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : Main@L3.1
Format settings, CABAC         : No
Format settings, ReFrames      : 2 frames
Codec ID                       : avc1
Codec ID/Info                  : Advanced Video Coding
Duration                       : 6mn 45s
Bit rate mode                  : Constant
Bit rate                       : 4 250 Kbps
Nominal bit rate               : 5 985 Kbps
Width                          : 1 280 pixels
Height                         : 720 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Variable
Frame rate                     : 29.970 fps
Minimum frame rate             : 29.970 fps
Maximum frame rate             : 29.980 fps
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Progressive
Bits/(Pixel*Frame)             : 0.154
Stream size                    : 205 MiB (97%)
Language                       : English
Material_Duration              : 405070
Material_StreamSize            : 215208429
Material_FrameCount            : 12140
Color primaries                : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics       : BT.709-5, BT.1361
Matrix coefficients            : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Output movie:

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : High@L3.1
Format settings, CABAC         : Yes
Format settings, ReFrames      : 5 frames
Codec ID                       : avc1
Codec ID/Info                  : Advanced Video Coding
Duration                       : 6mn 45s
Bit rate                       : 1 438 Kbps
Maximum bit rate               : 3 550 Kbps
Width                          : 1 280 pixels
Height                         : 720 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Variable
Frame rate                     : 29.970 fps
Minimum frame rate             : 29.960 fps
Maximum frame rate             : 29.980 fps
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : MBAFF
Bits/(Pixel*Frame)             : 0.052
Stream size                    : 69.5 MiB (95%)
Writing library                : x264 core 125 r2200+677M 3a754e7
Encoding settings              : cabac=1 / ref=5 / deblock=1:-2:-1 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / fade_compensate=0.00 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=3 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=tff / bluray_compat=0 / constrained_intra=0 / fgo=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=23.0000 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Encoded date                   : UTC 2012-10-28 09:52:27
Tagged date                    : UTC 2012-10-28 09:52:27
Matrix coefficients            : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

x264cli:

x264 --crf 23  --level 3.1 --preset veryslow --deblock -2:-1 --tune film --acodec aac --abitrate 70

Log:

ffms [info]: 1280x720i 1:1 @ 30001/1001 fps (vfr)
ffms [info]: color matrix: bt709
audio [info]: opened libavcodec's libvo_aacenc encoder (70.0kbps, 16bits, 2ch, 44100hz, 1600 priming samples)
x264 [warning]: input appears to be interlaced, enabling tff interlaced mode.
                If you want otherwise, use --no-interlaced or --bff
x264 [warning]: interlace + weightp is not implemented
x264 [info]: using SAR=1/1
x264 [warning]: frame MB size (80x46) > level limit (3600)
x264 [warning]: DPB size (5 frames, 7065600 bytes) > level limit (4 frames, 6912000 bytes)
x264 [warning]: MB rate (110293) > level limit (108000)
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
x264 [info]: profile High, level 3.1

The output is quiet good; but can you specify what this error means

x264 [warning]: input appears to be interlaced, enabling tff interlaced mode.
                If you want otherwise, use --no-interlaced or --bff

...& if I disable interlacing would it effect output positively or negatively.
the video is kind off slowmo drama with no action scenes, however I want detail of character faces to be preserved highly thus I opted for --deblock -2:-1. What do you think?

[jagabo]

If your source is progressive it should be encoded as such. Encoding it as interlaced will blur the colors a bit. I don't know why MediaInfo shows your source is progressive and x264 thinks it's interlaced. Is there any possibility it switches from 720p to 1080i midstream?

Encoding in interlaced mode may also eliminate Blu-ray playback as 720i isn't supported.

[ioncube]

Is there any possibility it switches from 720p to 1080i midstream?

No.