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• FFmpeg hevc_nvenc encoder B Frame problem

  16 mai 2023, par ramondq

  I'm using the latest FFmpeg windows Build (2022-12-02 12:44) from BtbN.
I'm trying to encode a video into HEVC codec using hevc_nvenc encoder. But it says [hevc_nvenc @ 00000263983f4280] B frames as references are not supported. Cause my GPU GTX1060 (GP106) doesn't support hardware accelerate encode HEVC of B frames.
command line

  


  I tried to disable the B frames by adding the parameter -bf 0, but it doesn't work.
Then I tried to use the latest build from gyan.dev and it is the same. But when I tried to use an older build (2021-02-28 12:32) of BtbN, it doesn't have the problem.
Is there a workaround to bypass this B frame problem ? Cause I don't want to switch to an older build. Thanks.

  


• How do I make FFMPEG use localized strftime with drawtext ?

  3 décembre 2022, par Randy Michnovicz

  I'm trying to write a script to use FFMPEG to draw localized timestamps on a video, but I'm not having much luck.

  


  I can confirm I have the locale fr_FR.UTF-8 installed on my system by running the following command : LC_ALL=fr_FR.UTF-8 date

  


  However, the following command produces a 4 second video beginning with the string "Monday 28 November 2022 19:00:47 PST" on both my Mac and an Alpine Linux docker container :

  


  LC_ALL=fr_FR.UTF-8 ffmpeg -hide_banner -f lavfi -i color=size=1024x768:rate=25:color=black -c:v libx264 -c:a aac -filter_complex drawtext=expansion=normal:fontsize=18:fontcolor=white:box=1:boxcolor=black@0.5:text='%{pts\\:localtime\\:1669690847\\:%A %-d %B %Y %X %Z}' -t 4 -y out.mp4

  


  Does anyone know how to make it create strings with non-English text ?

  


• batch scripting help passing arguments to ffmpeg

  20 octobre 2022, par notsolowki

  I need to join some videos parts together into 1 part. Im working from a folder called series. series contains multiple subfolder 1,2,3,4 etc that represent video number. each sub folder contains the parts to be joined together.

  


  I made a batch script that seems to be able to make a list of sub directories and make a list of sub directory contents,

  


  however run i run the script and try to pass the information from "mylist" line by line to ffmpeg it dont seem to work it complains invalid input information detected.

  


  I intended for the batch script to start at folder 1 and pass the file names from "mylist.txt" to ffmpeg input 1 by one untill the last folder in folderlist.txt is processed.

  


  What am i doing wrong. how can i make this script work ?

  


      :: Create File List
for /D %%G in ("%cd%\*")DO ( 

for %%i in ("%%~nxG"\*.mp4) do echo file '%%i'>> mylist.txt
echo %%~nxG >> folderlist.txt

)

:: Concatenate Files
::for /F "delims=" %%a in (mylist.txt) do (
ffmpeg -f concat -safe 0 -i %%a -c copy %%a.mp4
::)
pause
@echo off


pause


  


  the error i get when i run it from ffmpeg after running the batch is,

  


  C:\Users\Laptop\Desktop\t10>(ffmpeg -f concat -safe 0 -i "file '4\Tosh.0 April 17  2018 10 1004 April 17  2018 - Ticket Girl Act 1.mp4'" -c copy file '4\Tosh.0 April 17  2018 10 1004 April 17  2018 - Ticket Girl Act 1.mp4'.mp4 )
ffmpeg version 2022-10-06-git-2c2aaa5bd0-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 39.100 / 57. 39.100
  libavcodec     59. 50.100 / 59. 50.100
  libavformat    59. 34.100 / 59. 34.100
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 49.101 /  8. 49.101
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100
file '4\Tosh.0 April 17  2018 10 1004 April 17  2018 - Ticket Girl Act 1.mp4': No such file or directory