[FFmpeg-user] Use processed filename as draw text after tmix, in one pass?

Sun Apr 21 22:07:57 EEST 2024

> On Mar 6, 2024, at 11:49 AM, Steven Kan <steven at kan.org> wrote:
> 
> Planning ahead to the successor to my honeycomb time-lapse video from 2022, processed using tmix per advice from this group:
> 
> https://ffmpeg.org//pipermail/ffmpeg-user/2022-April/054742.html
> 
> https://www.youtube.com/watch?v=2dUGbGcGE2c
> 
> This time I’m capturing the photos with a dSLR and gphoto on a Raspberry Pi, and the dSLR does not burn in a timestamp. 
> 
> This is actually a good thing, because I don’t like how my timestamps got tmixed away last time. I’d like to apply them after tmix.
> 
> I’m saving the photos with the timestamp as the sortable filename, e.g. 
> 
> 2024-03-06-11-40-11.jpg
> 
> This time I’d like to tmix 50 frames, read the filename of the 50th frame, re-arrange the text of the filename to U.S. style, e.g. "03/06/24, 11:40:11 AM", and then drawtext it onto the output. 
> 
> Can this be done in one pass? Or would I need to do a first pass to create the text fields in some companion files, e.g. 2024-03-06-11-40-11.txt, or even multiple passes to do the tmix first and then the drawtext? I’d like to avoid multiple passes of video processing to avoid generation loss, if possible.

Partial answer to my own question, from here:

https://superuser.com/questions/717103/burn-filenames-of-single-images-into-ffmpeg-output-video

So this command works:

ffmpeg -f image2  -export_path_metadata 1 -pattern_type glob -i '*.jpg' -vf "drawtext=text='%{metadata\:lavf.image2dec.source_basename\:NA}': fontfile=/System/Library/Fonts/Helvetica.ttc:fontcolor=white: fontsize=48: x=(w-text_w)*0.01: y=(h-text_h)*0.98" -y CombLapseWithFilenames.mp4

and creates:

https://www.kan.org/download/CombLapseWithFilenames.mp4

But the drawtext is the original filenames, e.g. 2024-04-21-08-20-11.jpg, which format I chose in my photo-taking script so that they’d sort properly.

Can I reformat that in U.S.-style, e.g. "04/21/24, 08:20:11” and strip the .jpg extension, and do this all in one pass? 

Thanks!

console outptut:

ffmpeg version N-109776-g7e1d474021-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  libavutil      57. 44.100 / 57. 44.100
  libavcodec     59. 63.100 / 59. 63.100
  libavformat    59. 38.100 / 59. 38.100
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 56.100 /  8. 56.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100
Input #0, image2, from '*.jpg':
  Duration: 00:00:00.40, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 3008x2000, 25 fps, 25 tbr, 25 tbn
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7feb17f05980] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x7feb17f05980] profile High 4:2:2, level 5.1, 4:2:2, 8-bit
[libx264 @ 0x7feb17f05980] 264 - core 164 r3106 eaa68fa - H.264/MPEG-4 AVC codec - Copyleft 2003-2023 - http://www.videolan.org/x264.html - options: 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=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'CombLapse.mp4':
  Metadata:
    encoder         : Lavf59.38.100
  Stream #0:0: Video: h264 (avc1 / 0x31637661), yuvj422p(pc, bt470bg/unknown/unknown, progressive), 3008x2000, q=2-31, 25 fps, 12800 tbn
    Metadata:
      encoder         : Lavc59.63.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=   10 fps=6.2 q=-1.0 Lsize=    2468kB time=00:00:00.28 bitrate=72202.0kbits/s speed=0.174x    
video:2467kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.040221%
[libx264 @ 0x7feb17f05980] frame I:1     Avg QP:26.46  size:478059
[libx264 @ 0x7feb17f05980] frame P:3     Avg QP:27.24  size:274912
[libx264 @ 0x7feb17f05980] frame B:6     Avg QP:27.80  size:203762
[libx264 @ 0x7feb17f05980] consecutive B-frames: 20.0%  0.0%  0.0% 80.0%
[libx264 @ 0x7feb17f05980] mb I  I16..4:  4.6% 81.8% 13.6%
[libx264 @ 0x7feb17f05980] mb P  I16..4:  0.9% 25.5%  4.9%  P16..4: 39.7%  8.2%  5.2%  0.0%  0.0%    skip:15.7%
[libx264 @ 0x7feb17f05980] mb B  I16..4:  1.1% 14.7%  4.6%  B16..8: 19.7%  6.0%  2.6%  direct:20.1%  skip:31.3%  L0:36.1% L1:57.1% BI: 6.8%
[libx264 @ 0x7feb17f05980] 8x8 transform intra:78.1% inter:80.4%
[libx264 @ 0x7feb17f05980] coded y,uvDC,uvAC intra: 90.4% 98.0% 67.6% inter: 32.5% 58.9% 5.0%
[libx264 @ 0x7feb17f05980] i16 v,h,dc,p: 22% 39%  3% 36%
[libx264 @ 0x7feb17f05980] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 18% 13%  6%  9% 10%  8%  9% 10%
[libx264 @ 0x7feb17f05980] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 15% 10%  8% 11% 11%  9%  9%  8%
[libx264 @ 0x7feb17f05980] i8c dc,h,v,p: 40% 21% 25% 13%
[libx264 @ 0x7feb17f05980] Weighted P-Frames: Y:33.3% UV:33.3%
[libx264 @ 0x7feb17f05980] ref P L0: 72.9% 10.8% 11.9%  4.4%
[libx264 @ 0x7feb17f05980] ref B L0: 80.0% 18.9%  1.1%
[libx264 @ 0x7feb17f05980] ref B L1: 83.0% 17.0%
[libx264 @ 0x7feb17f05980] kb/s:50507.26