FFMPEG deinterlace before SD h264 encode in one batch possible ?

[Gwar]

hey guys,

I want to convert my VHS captures which are all single mpeg2 files with audio and in interlaced PAL to regular progressive h264 mp4 files. And I would love to do this in one step. I thought the most easy way to do that would be my beloved ffmpeg which I use for a long time for almost everything.
However it sadly doesn't work. Is there a way that -vf and -c:v could work together in one batch/cmd ?. Or will this always be 2 step scenario?

Maybe I made a mistake? Here is my cmd maybe you guys have an idea. Thanks for looking
cheers

"%FFMPEG%" -i %INPUTFILE% -map 0:v -map 1:a -acodec ac3 -ar 48000 -ab 192k -vf "bwdif=mode=0:parity=0,fps=25000/1000" -c:v libx264 -pix_fmt yuv420p -profile:v high -level:v 4.1 -preset slow -tune film -crf 16 -x264opts bluray-compat=1:min-keyint=25:b-adapt=2:me=umh:vbv-bufsize=5000:vbv-maxrate=10000:colorprim=bt601:transfer=bt601:colormatrix=bt601:sar=12/11 -fflags +genpts -bsf:v h264_mp4toannexb %1%.mp4

[LigH.de]

Deinterlacing as video filter and the selection of a video codec will certainly work as a sequence in the same pass.

If it "does not work", you may have chosen either the wrong kind of deinterlacing filter ("bob weave" is not one I would prefer first if I want progressive same-frame-rate results, possibly rather yadif – see an overview) or unfortunate parameters for it.

Some ffmpeg parameters work best in a certain order; I would recommend using the support of tools which have some expertise in building ffmpeg command lines, like Clever FFmpeg-GUI or Hybrid.

[richardpl]

That link is from 2017, No longer relevant by any means.

[LigH.de]

Do you know any recent overview and comparison of ffmpeg deinterlacing filters, instead of just complaining?

It may be old but doesn't look completely irrelevant to me. There are more choices now, but those mentioned still exist.

A certainly recent documentation is the complete ffmpeg filters list. Enjoy searching through it for those you are interested in; and it doesn't have examples in the expected syntax even.

[Gwar]

thanks for the suggestions but I would rather use my own command line.
I rewrote my line like this

"%FFMPEG%" -i %INPUTFILE% -map 0:v -map 1:a -c:v libx264  -vf "yadif=mode=0:parity=0,deint=0,fps=25000/1000, format=yuv420p" -profile:v high -level:v 4.1 -preset ultrafast -tune film -crf 16 -x264opts bluray-compat=1:min-keyint=25:b-adapt=2:me=umh:vbv-bufsize=5000:vbv-maxrate=10000:colorprim=bt601:transfer=bt601:colormatrix=bt601:sar=12/11 -acodec ac3 -ar 48000 -ab 192k -fflags +genpts -bsf:v h264_mp4toannexb %1%.mp4

but that also didnt work. I'm always getting the error "Invalid input file index: 1."

[LigH.de]

Aaah ... so the error message points far away from the video filter string. What do MediaInfo and ffprobe tell about the content of your source file?

[Gwar]

ffprobe

Input #0, mpeg, from '..............mpg':
  Duration: 01:39:25.92, start: 0.235211, bitrate: 4875 kb/s
  Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, top first), 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 90k tbn
    Side data:
      cpb: bitrate max/min/avg: 9400000/0/0 buffer size: 1835008 vbv_delay: N/A
  Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s

media info

General
Complete name                            : ............mpg
Format                                   : MPEG-PS
File size                                : 3.39 GiB
Duration                                 : 1 h 39 min
Overall bit rate mode                    : Variable
Overall bit rate                         : 4 876 kb/s

Video
ID                                       : 224 (0xE0)
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings                          : CustomMatrix / BVOP
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Custom
Format settings, GOP                     : Variable
Format settings, picture structure       : Frame
Duration                                 : 1 h 39 min
Bit rate mode                            : Variable
Bit rate                                 : 4 523 kb/s
Maximum bit rate                         : 9 400 kb/s
Width                                    : 720 pixels
Height                                   : 576 pixels
Display aspect ratio                     : 4:3
Frame rate                               : 25.000 FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan order                               : Top Field First
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.436
Time code of first frame                 : 00:00:00:00
Time code source                         : Group of pictures header
GOP, Open/Closed                         : Open
GOP, Open/Closed of first frame          : Closed
Stream size                              : 3.14 GiB (93%)
Color primaries                          : BT.601 PAL
Transfer characteristics                 : BT.470 System B/G
Matrix coefficients                      : BT.470 System B/G

Audio
ID                                       : 189 (0xBD)-128 (0x80)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Muxing mode                              : DVD-Video
Duration                                 : 1 h 39 min
Bit rate mode                            : Constant
Bit rate                                 : 256 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 182 MiB (5%)
Service kind                             : Complete Main

Menu
Format                                   : DVD-Video

[jagabo]

You're command line is specifying audio from a second source but you never input that second source. If you want audio from the same source specify -map 0:a, not -map 1:a. Your Yadif syntax is wrong. There should be a colon between each parameter, not a comma . Try bwdif instead of Yadif. It's much better. And double rate deinterlace to 50 fps to get full motion smoothness. There's no color format named bt601. Use bt470bg.

Audio from same file, yadif to 50p, bt601 colors:

"%FFMPEG%" -i %INPUTFILE% -map 0:v -map 0:a -c:v libx264  -vf "yadif=mode=1:parity=0:deint=0,format=yuv420p" -profile:v high -level:v 4.1 -preset ultrafast -tune film -crf 16 -x264opts bluray-compat=1:min-keyint=25:b-adapt=2:me=umh:vbv-bufsize=5000:vbv-maxrate=10000:colorprim=bt470bg:transfer=bt470bg:colormatrix=bt470bg:sar=12/11 -acodec ac3 -ar 48000 -ab 192k -fflags +genpts -bsf:v h264_mp4toannexb %1%.mp4

[Gwar]

works awesome, thanks jagabo

[LigH.de]

Try bwdif instead of Yadif. It's much better.

OK, new to me that this means an elaborate deinterlacer, not just bobbing or weaving. It's also available for VapourSynth and AviSynth, nice to have.

[hydra3333]

Hello.

This probably won't help, and no doubt people can validly criticise and make better recommendations, however here's an example of ffmpeg which was built with vapoursynth support and popped into the top level vapoursynth install folder.
It is provided only as an example, rather than a "use this it is fantastic high quality" suggestion (which doesn't suit some of my "wants").
It requires a 10 series or higher nvidia gpu card and up to date drivers for gpu encoding etc.
It uses Donald Graft's free DG tools in vapoursynth to do the deinterlacing and denoising and sharpening etc for SD sources.

Results are quite reasonable given the TV capture SD sources and is relatively speedy given gpu accelerated decoding and denoising and sharpening and encoding.
"Good enough" for my SD TV purposes.
If I wanted a "higher quality" result (unlikely for that type of source and nature of material) then I'd probably lean more for the suggestions above.
Like I said, provided as an example only

Cheers

"%ffmpeg%" -hide_banner -v verbose -nostats -f vapoursynth -i "input_file.vpy" -probesize 200M -analyzeduration 200M  -i "input_file.mpg" -map 0:v:0 -map 1:a:0 -vf "setdar=16/9" -vsync 0 -sws_flags lanczos+accurate_rnd+full_chroma_int+full_chroma_inp -strict experimental -c:v h264_nvenc -pix_fmt nv12 -preset p7 -multipass fullres -forced-idr 1 -g 25 -coder:v cabac -spatial-aq 1 -temporal-aq 1 -dpb_size 0 -bf:v 3 -b_ref_mode:v 0 -rc:v vbr -cq:v 0 -b:v 2000000 -minrate:v 100000 -maxrate:v 4000000 -bufsize 4000000 -profile:v high -level 5.2 -movflags +faststart+write_colr -af "adelay=delays=25ms:all=1" -c:a libfdk_aac -cutoff 20000 -ab 256k -ar 48000  -y "input_file.mp4"

import vapoursynth as vs		# this allows use of constants eg vs.YUV420P8
from vapoursynth import core	# actual vapoursynth core
#import functool
#import mvsfunc as mvs			# this relies on the .py residing at the VS folder root level - see run_vsrepo.bat
#import havsfunc as haf		# this relies on the .py residing at the VS folder root level - see run_vsrepo.bat
core.std.LoadPlugin(r'C:\SOFTWARE\Vapoursynth-x64\DGIndex\DGDecodeNV.dll') # do it like gonca https://forum.doom9.org/showthread.php?p=1877765#post1877765
core.avs.LoadPlugin(r'C:\SOFTWARE\Vapoursynth-x64\DGIndex\DGDecodeNV.dll') # do it like gonca https://forum.doom9.org/showthread.php?p=1877765#post1877765
# NOTE: deinterlace=1, use_top_field=True for "Interlaced"/"TFF" "MPEG-2V"/"MPA1L2"
video = core.dgdecodenv.DGSource(r'D:\VRDTVSP-SCRATCH\input_file.QSF.dgi', deinterlace=1, use_top_field=True, use_pf=False)
# DGDecNV changes -
# 2020.11.07 Revised DGDenoise parameters. The 'chroma' option is removed.
#            Now, if 'strength' is set to 0.0 then luma denoising is disabled,
#            and if cstrength is set to 0.0 then chroma denoising is disabled.
#            'cstrength' is now defaulted to 0.0, and 'searchw' is defaulted to 9.
# example: video = core.avs.DGDenoise(video, strength=0.06, cstrength=0.06) # replaced chroma=True
video = core.avs.DGDenoise(video, strength=0.06, cstrength=0.06) # replaced chroma=True
# example: video = core.avs.DGSharpen(video, strength=0.3)
video = core.avs.DGSharpen(video, strength=0.3)
#video = vs.core.text.ClipInfo(video)
video.set_output()

edit: forgot to mention used DGIndexNV to create 'D:\VRDTVSP-SCRATCH\input_file.QSF.dgi' before running ffmpeg