FFmpeg - remove encoding settings from output

[osmium]

I use this command to reencode:

ffmpeg -y -hide_banner -hwaccel auto -copyts -i INPUT.ts -vcodec libx264 -x264opts force-cfr:nal-hrd=cbr -profile:v high -level:v 40 -preset medium -b:v 1000k -maxrate 1000k -bufsize 1000k -flags +ilme+ildct -alternate_scan 1 -top 0 -acodec copy -bsf:v "filter_units=remove_types=6" -map 0 OUTPUT.ts

MediaInfo for the output:

General
ID                          : 1 (0x1)
Complete name               : C:\TV\output.ts
Overall bit rate mode       : Variable
Overall bit rate            : 1 379 kb/s

Video
ID                          : 256 (0x100)
Menu ID                     : 1 (0x1)
Format                      : AVC
Format/Info                 : Advanced Video Codec
Format profile              : High@L4
Format settings             : CABAC / 4 Ref Frames
Format settings, CABAC      : Yes
Format settings, Reference  : 4 frames
Codec ID                    : 27
Duration                    : 13 s 480 ms
Bit rate mode               : Constant
Bit rate                    : 1 000 kb/s
Width                       : 1 920 pixels
Height                      : 1 080 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                   : MBAFF
Scan type, store method     : Interleaved fields
Scan order                  : Top Field First
Bits/(Pixel*Frame)          : 0.019
Stream size                 : 1.69 MiB (76%)
Writing library             : x264 core 161 r3033 0d754ec
Encoding settings           : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=tff / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=cbr / mbtree=1 / bitrate=1000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=1000 / vbv_bufsize=1000 / nal_hrd=cbr / filler=1 / ip_ratio=1.40 / aq=1:1.00

Audio
ID                          : 257 (0x101)
Menu ID                     : 1 (0x1)
Format                      : MPEG Audio
Format version              : Version 1
Format profile              : Layer 2
Codec ID                    : 3
Duration                    : 13 s 464 ms
Bit rate mode               : Constant
Bit rate                    : 256 kb/s
Channel(s)                  : 2 channels
Sampling rate               : 48.0 kHz
Frame rate                  : 41.667 FPS (1152 SPF)
Compression mode            : Lossy
Stream size                 : 421 KiB (19%)

Menu
ID                          : 4096 (0x1000)
Menu ID                     : 1 (0x1)
Duration                    : 13 s 440 ms
List                        : 256 (0x100) (AVC) / 257 (0x101) (MPEG Audio)
Service name                : Service01
Service provider            : FFmpeg
Service type                : digital television

I want to remove the "Encoding settings" and "Writing library" fields from the MediaInfo report, this is what the 'filter_units' bitstream filter does and it works, but I found it removes these 2 fields as well and I want to keep them:

Scan type, store method : Interleaved fields
Scan order : Top Field First

Any way how to do it ?

[Selur]

You could always edit the data with a hex editor.

this is what the 'filter_units' bitstream filter does and it works, but I found it removes these 2 fields as well and I want to keep them

Filter units does allow to drop or keep specific NAL units, assuming you understand what that means, have you tried adjusting the list of units to keep/drop?
There is a list of the NAL units in H.264 over at https://yumichan.net/video-processing/video-compression/introduction-to-h264-nal-unit/ (under 'More about NAL Unit Type') which might help in case you don't know what NAL unit contains what.
Assuming the info you want to keep and you want to remove are not in the same NAL unit types, adjusting your filter_units should help.


Cu Selur

[osmium]

You could always edit the data with a hex editor.

I prefer a more scriptable solution, editing files one by one will be overkill plus its a bit beyond my knowledge.

Assuming the info you want to keep and you want to remove are not in the same NAL unit types, adjusting your filter_units should help.

It seems they are in in the same NAL unit type, I tried everything else from this list that looks appropriate to me e.g. -bsf:v "filter_units=remove_types=0|16-18|22-31".

[Selur]

-> If they are not in separate NAL unit types you can't remove that info with ffmpeg.

Cu Selur