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• How to suppress `ffmpeg` output logging when using H.265 codec in quiet mode

  5 avril 2022, par user223364

  When I run :-

  


  ffmpeg -v quiet -i "${INPUT}" -c:v libx265 -crf 23 "${OUTPUT}"


  


  I'm still getting output from the command even though the loglevel is set to silent (see the example of the output below)

  


  x265 [info]: HEVC encoder version 3.5+20-17839cc0d
x265 [info]: build info [Mac OS X][clang 11.0.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
x265 [info]: Main profile, Level-3 (Main tier)
x265 [info]: Thread pool created using 4 threads
x265 [info]: Slices                              : 1
x265 [info]: frame threads / pool features       : 2 / wpp(9 rows)
x265 [warning]: Source height < 720p; disabling lookahead-slices
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias  : 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
x265 [info]: References / ref-limit  cu / depth  : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress            : CRF-23.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip mode=1 signhide tmvp
x265 [info]: tools: b-intra strong-intra-smoothing deblock sao


  


  I'm using v5 of ffmpeg

  


  ffmpeg version 5.0-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)


  


  How do I get ffmpeg to be really quiet ?

  


• FFmpeg IF/ELSE statement

  13 mai 2022, par Hrvoje

  I am doing reencoding of lots of video files, and sometimes some of them have subtitles included, some dont. Is it possible to "ignore"
-vf "subtitles=%%f:force_style='MarginV=25,Fontsize=20'" -sn statement in FFmpeg command IF input file does not have subtitles included ?

  


  My command is :

  


  for %%f in (*.mkv) do ffmpeg -hwaccel nvdec -i "%%f" -strict -2 -max_muxing_queue_size 1024 -map_metadata -1 -map_chapters -1 -vf "subtitles=%%f:force_style='MarginV=25,Fontsize=20'" -sn -c:v hevc_nvenc -rc vbr -cq 24 -qmin 24 -qmax 24 -tier high -level 4 -preset medium -profile:v main10 -pix_fmt p010le -b:v 0K -ac 6 -ar 48000 -b:a:0 640k -c:a:0 ac3 -metadata:s:a:0 title="Dolby Digital" E:\Encoded\%%f


  


  Note that there are more than 100 files in a batch and checking them by hand is time consuming.

  


  Maybe right aproach is to first inspect file in a batch script and if that file has subtitles, then execute first command, if it does not have subtitles, execute second command. But, I dont know how to do a script like that.

  


• How do I use ffmpeg to concatenate 2 videos and add a period of silence + black screen between them ?

  29 avril 2022, par masotime

  There are several existing examples, but I'd like a single command that uses complex_filter to achieve the objective without doing extra things like generating blank video / audio files.

  


  Looking around, this is the best I've come up with so far :

  


  ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "color=black:s=960x540:d=1[b0];aevalsrc=0:d=1[s0];[0:v:0][0:a:0][b0][s0][1:v:0][1:a:0]concat=n=3:v=1:a=1[outv][outa]" -map '[outv]' -map '[outa]' out.mp4


  


  My understanding of the breakdown of such a command is

  


  

  1. specify 2 inputs

  


  2. define a complex filter

  


  3. define a black video stream of duration 1s and call it b0

  


  4. define a silent audio stream of duration 1s and call it s0

  


  5. pipe it through the concat filter with

  


  


  

  • First stream : [0:v:0][0:a:0] // video1.mp4

  


  • Second stream : [b0][s0] // stuff I defined earlier

  


  • Third stream : [1:v:0][1:a:0] // video2.mp4

  


  


  

  6. define 2 output streams [outv][outa] for video and audio respectively

  


  7. combine them into out.mp4

  


  


  All file inputs are correctly 960x540, all using the same audio and video codecs but ffmpeg gives me this error and starts using 100% CPU

  


  More than 1000 frames duplicated


  


  I think there's something wrong with the streams I'm defining in the filter - what's wrong ? Do I need to specify more parameters somewhere ?

  


  EDIT : Here's a MediaInfo printout of the input video's metadata

  


  Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/mp41)
File size                                : 7.82 MiB
Duration                                 : 31 s 449 ms
Overall bit rate                         : 2 086 kb/s
Writing application                      : Lavf59.16.100

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main@L3@Main
Codec ID                                 : hvc1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 31 s 449 ms
Bit rate                                 : 1 973 kb/s
Maximum bit rate                         : 2 000 kb/s
Width                                    : 960 pixels
Height                                   : 540 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0 (Type 0)
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.159
Stream size                              : 7.40 MiB (95%)
Writing library                          : x265 3.4+31-6722fce1f:[Mac OS X][clang 12.0.0][64 bit] 8bit+10bit+12bit
Encoding settings                        : cpuid=1111039 / frame-threads=4 / wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=1 / input-res=960x540 / interlace=0 / total-frames=0 / level-idc=0 / high-tier=1 / uhd-bd=0 / ref=3 / 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 / gop-lookahead=0 / bframes=4 / b-adapt=2 / b-pyramid / bframe-bias=0 / rc-lookahead=20 / lookahead-slices=0 / scenecut=40 / hist-scenecut=0 / radl=0 / no-splice / no-intra-refresh / ctu=64 / min-cu-size=8 / no-rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / strong-intra-smoothing / max-merge=3 / limit-refs=1 / no-limit-modes / me=1 / subme=2 / merange=57 / temporal-mvp / no-frame-dup / no-hme / weightp / no-weightb / no-analyze-src-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=3 / selective-sao=4 / 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=0.00 / no-rd-refine / no-lossless / cbqpoffs=0 / crqpoffs=0 / rc=abr / bitrate=2000 / qcomp=0.60 / qpstep=4 / stats-write=1 / stats-read=0 / slow-firstpass / ipratio=1.40 / pbratio=1.30 / aq-mode=2 / aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=1 / overscan=0 / videoformat=5 / range=0 / colorprim=1 / transfer=1 / colormatrix=1 / chromaloc=1 / chromaloc-top=0 / chromaloc-bottom=0 / display-window=0 / cll=0,0 / min-luma=0 / max-luma=255 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / hist-threshold=0.03 / no-opt-cu-delta-qp / no-aq-motion / no-hdr10 / no-hdr10-opt / no-dhdr10-opt / no-idr-recovery-sei / analysis-reuse-level=0 / analysis-save-reuse-level=0 / analysis-load-reuse-level=0 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=1 / refine-ctu-distortion=0 / no-limit-sao / ctu-info=0 / no-lowpass-dct / refine-analysis-type=0 / copy-pic=1 / max-ausize-factor=1.0 / no-dynamic-refine / no-single-sei / no-hevc-aq / no-svt / no-field / qp-adaptation-range=1.00 / scenecut-aware-qp=0conformance-window-offsets / right=0 / bottom=0 / decoder-max-rate=0 / no-vbv-live-multi-pass
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : hvcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 31 s 449 ms
Source duration                          : 31 s 492 ms
Source_Duration_LastFrame                : -17 ms
Bit rate mode                            : Constant
Bit rate                                 : 106 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                              : 405 KiB (5%)
Source stream size                       : 406 KiB (5%)
Title                                    : Core Media Audio
Language                                 : English
Default                                  : Yes
Alternate group                          : 1