I-o DATA GV-USB2 + Panasonic DMR-ES15 first test capture

[dellsam34]

It resizes the 720x480 to 640x480 and crops the bottom 6 rows of pixels off.

You can't crop one side only, It will change the frame geometry, Crop according to an aspect ratio or mask replacing the cropped lines by black ones. 474 lines is non standard, Only software will recognize that resolution.
De-interlace, crop to ratio and resize to a higher resolution to avoid line artifacts such as moiré, For example if you want to crop the bottom 6 pixels, here is how it's done:
The aspect ratio for captures originated from analog tapes is 704:480 for NTSC (4:3 non square pixel), So h=(704/480)x474 = 695.2 or 696 the nearest even number. Your new resolution will be 696x474, resize this to 1440x1080 to avoid any artifacts, if you don't want resizing to a higher resolution just mask the 6 lines with black and call it a day.

[Sharc]

Also I'm currently resizing and cropping the head noise in avisynth, here is my script.

assumeTFF()
TFM().Tdecimate()
BilinearResize(640, 480, 0, 0, 720, 474)

It resizes the 720x480 to 640x480 and crops the bottom 6 rows of pixels off.

You may also want to crop the side pillars, so

assumeTFF()
TFM().TDecimate()
crop(8,2,-10,-6)
BilinearResize(640, 480)

would not only remove the side pillars but it would also produce slightly more exact square pixels.

[boolian2]

Also I'm currently resizing and cropping the head noise in avisynth, here is my script.

assumeTFF()
TFM().Tdecimate()
BilinearResize(640, 480, 0, 0, 720, 474)

It resizes the 720x480 to 640x480 and crops the bottom 6 rows of pixels off.

You may also want to crop the side pillars, so

assumeTFF()
TFM().TDecimate()
crop(8,2,-10,-6)
BilinearResize(640, 480)

would not only remove the side pillars but it would also produce slightly more exact square pixels.

I tried your code and here is the result. Does it look right?

General
Complete name                            : capture-cropped-resized.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/mp41)
File size                                : 247 MiB
Duration                                 : 1 min 10 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 29.6 Mb/s
Writing application                      : Lavf57.79.100

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Format Range@L8.5@Main
Codec ID                                 : hev1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 1 min 10 s
Bit rate                                 : 29.2 Mb/s
Width                                    : 640 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 4:3
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Bit depth                                : 8 bits
Bits/(Pixel*Frame)                       : 3.964
Stream size                              : 244 MiB (99%)
Writing library                          : x265 2.5+12-fcd9154fa4e2:[Windows][GCC 7.2.0][64 bit] 8bit+10bit+12bit
Encoding settings                        : cpuid=1173503 / frame-threads=5 / wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=2 / input-res=640x480 / interlace=0 / total-frames=0 / level-idc=0 / high-tier=1 / uhd-bd=0 / ref=5 / no-allow-non-conformance / no-repeat-headers / annexb / no-aud / no-hrd / info / hash=0 / no-temporal-layers / open-gop / min-keyint=23 / keyint=250 / bframes=8 / b-adapt=2 / b-pyramid / bframe-bias=0 / rc-lookahead=40 / lookahead-slices=0 / scenecut=40 / no-intra-refresh / ctu=64 / min-cu-size=8 / rect / amp / max-tu-size=32 / tu-inter-depth=3 / tu-intra-depth=3 / limit-tu=4 / rdoq-level=2 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / strong-intra-smoothing / max-merge=4 / limit-refs=1 / limit-modes / me=3 / subme=4 / merange=57 / temporal-mvp / weightp / weightb / no-analyze-src-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=6 / no-early-skip / rskip / no-fast-intra / no-tskip-fast / no-cu-lossless / b-intra / no-splitrd-skip / rdpenalty=0 / psy-rd=2.00 / psy-rdoq=1.00 / no-rd-refine / analysis-reuse-mode=0 / lossless / cbqpoffs=0 / crqpoffs=0 / rc=cqp / qp=4 / ipratio=1.40 / pbratio=1.30 / aq-mode=0 / aq-strength=0.00 / no-cutree / zone-count=0 / no-strict-cbr / qg-size=64 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=0 / overscan=0 / videoformat=5 / range=0 / colorprim=2 / transfer=2 / colormatrix=5 / chromaloc=0 / display-window=0 / max-cll=0,0 / min-luma=0 / max-luma=255 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / opt-qp-pps / opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / no-opt-cu-delta-qp / no-aq-motion / no-hdr / no-hdr-opt / no-dhdr10-opt / analysis-reuse-level=5 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=0 / no-limit-sao / ctu-info=0
Color range                              : Limited
Matrix coefficients                      : BT.470 System B/G
Codec configuration box                  : hvcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 1 min 10 s
Duration_LastFrame                       : -10 ms
Bit rate mode                            : Variable
Bit rate                                 : 366 kb/s
Maximum bit rate                         : 576 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 3.06 MiB (1%)
Default                                  : Yes
Alternate group                          : 1

[davexnet]

It's slightly out, but I don't think anybody would notice.
Unless you had a perfect circle on the screen to measure

[Eric-jan]

capture @ 800x600

That's not capturing, it's called resizing on the fly, Capture cards' ADC captures at 720x480 or 720x576, You can only change the output, but for what reason?

With me it removed headswitching noise at the bottom, and almost no black pixels at the sides.

[Sharc]

It's slightly out, but I don't think anybody would notice......

Right, ~1.4% error, because I didn't want to crop too much into the picture, and I cropped the black line at the top as well. My compromise

[dellsam34]

capture @ 800x600

That's not capturing, it's called resizing on the fly, Capture cards' ADC captures at 720x480 or 720x576, You can only change the output, but for what reason?

With me it removed headswitching noise at the bottom, and almost no black pixels at the sides.

Resizing in itself does not remove anything unless you crop first.

[Eric-jan]

capture @ 800x600

That's not capturing, it's called resizing on the fly, Capture cards' ADC captures at 720x480 or 720x576, You can only change the output, but for what reason?

With me it removed headswitching noise at the bottom, and almost no black pixels at the sides.

Resizing in itself does not remove anything unless you crop first.

I use the capture function of Movavi Video Editor for the HDMI dongle, the dongle does not handle the AR well, most converters are designed for gamers needs, to fill a widescreen.

But my best option now is: Panasonic DMR-ES35V > BlackMagicDesign Analog to SDI converter > Video Assist (Screen/Recorder) (file on flash card)

[DB83]

^^ Why are you even discussing HDMI here ? Bang off-topic.