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• FFmpeg - invalid argument on a creation of MP4 with .SRT - "Unable to parse option value "Link_to_the.srt" as image size...?

  20 mai 2023, par sKunZel

  I'm stuck for 2 weeks on same problem on developping a command that bring together a .mp4 file consisting on a fixed image & audio from a .mp3 and then burnt-in subtitle from a stylized .srt into a new MP4.

  


  Here is my command :
 command = f"""ffmpeg -report -i "input_video_arg_abs" -vf "subtitles='input_srt_arg_abs':original_size=816x1456:force_style='FontName=Open Sans Italic,FontSize=13,MarginR=10,MarginV=149'" -c:v libx264 -crf 18 -c:a copy -movflags +faststart "output_video" """

  


  And you can see here the main script definitions of variables and call to fonction :

  


  


  input_srt = os.path.normpath(os.path.join(input_directory, srt_file))
print(f"Chemin du fichier SRT : input_srt")
reformat_srt(input_srt)
final_video_output=os.path.normpath(os.path.join(output_directory,
os.path.splitext(mp3_file)[0] + '.mp4'))
time.sleep(0.5)
create_final_video(temp_video_output, input_srt, final_video_output)

  


  


  This code generated an output file correctly named but 0 Ko. Every log i found indicated an error in the way of my .srt but when i print my input_srt it is correct.

  


  Here i add up some logs :

  


  [h264 @ 000002806874c340] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[Parsed_subtitles_0 @ 0000028068d97d00] Setting 'filename' to value 'E'
[Parsed_subtitles_0 @ 0000028068d97d00] Setting 'original_size' to value 'YouTubeMcKennaWe_Plants_Are_Happy_PlantsSRTSans_programmation_paralleleinputTerence_McKenna_The_Good_the_True_and_the_Beautiful.srt'
[subtitles @ 0000028068f0de40] Unable to parse option value "YouTubeMcKennaWe_Plants_Are_Happy_PlantsSRTSans_programmation_paralleleinputTerence_McKenna_The_Good_the_True_and_the_Beautiful.srt" as image size
[Parsed_subtitles_0 @ 0000028068d97d00] Setting 'original_size' to value '816x1456'
[Parsed_subtitles_0 @ 0000028068d97d00] Setting 'force_style' to value 'FontName=Open Sans Italic,FontSize=13,MarginR=10,MarginV=149'
[Parsed_subtitles_0 @ 0000028068d97d00] Raster: FreeType 2.10.2
[Parsed_subtitles_0 @ 0000028068d97d00] Shaper: FriBidi 1.0.9 (SIMPLE)
[Parsed_subtitles_0 @ 0000028068d97d00] Initialized
[NULL @ 0000028068f0f480] Opening 'E' for reading
[file @ 000002806bf2b800] Setting default whitelist 'file,crypto'
[Parsed_subtitles_0 @ 0000028068d97d00] Unable to open E
[AVFilterGraph @ 0000028069044cc0] Error initializing filter 'subtitles' with args 'E:\YouTube\McKenna\We_Plants_Are_Happy_Plants\SRT\Sans_programmation_parallele\input\Terence_McKenna_The_Good_the_True_and_the_Beautiful.srt:original_size=816x1456:force_style=FontName=Open Sans Italic,FontSize=13,MarginR=10,MarginV=149'
Error reinitializing filters!
Failed to inject frame into filter network: No such file or directory
Error while processing the decoded data for stream #0:0
[AVIOContext @ 0000028068bbab80] Statistics: 0 seeks, 0 writeouts
[AVIOContext @ 0000028068693640] Statistics: 1370703 bytes read, 0 seeks
Conversion failed!


  


  I'm thinking of "E :" as the problem since on Windows it should be correct but with FFMPEG langage, i don't know...

  


  I wish anyone can help me, and will be glad if it is a tricky solution. Else, sorry for my newbism...
Thanks
sKunZel

  


• Is there a way to cut movement "dead air" on a screen recording ? [closed]

  16 mai 2023, par Raelbe

  I have got a couple of screen recordings of a painting I've done, and I've managed to concat the files together.

  


  Unfortunately, there is a lot of "dead air" in the video (where I have left my desk, so there is no movement happening on screen) is there a way to cut out this down time ?

  


  I found an example that another artist uses for his screen recordings, so I plugged it in with my file directory's. This is what I used :

  


  .\ffmpeg -f concat -safe 0 -i "merge.txt" -vf npdecimate=hi=64*12:lo=64*5:frac=0.33,seipts=N/30/TB,"setpts=0.25*PTS" -r 30 -crf 30 -an Illu_Test.mp4


  


  I got this error message at the end :

  


  [AVFilterGraph @ 000001cadfe5b1c0] No option name near 'N/30/TB'
[AVFilterGraph @ 000001cadfe5b1c0] Error parsing a filter description around: ,setpts=0.25*PTS
[AVFilterGraph @ 000001cadfe5b1c0] Error parsing filterchain 'npdecimate=hi=64*12:lo=64*5:frac=0.33,seipts=N/30/TB,setpts=0.25*PTS' around: ,setpts=0.25*PTS
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0`


  


  So I chopped it up a bit and this is what I used to concat the files and it worked perfectly.

  


  .\ffmpeg -f concat -safe 0 -i "merge.txt" -crf 30 -an Illu_Test.mp4


  


  Now, I'm looking to cut out the seconds of no movement. I'm unsure what the -crf command does (as stated I am brand new to this) OG artist states that :

  


  "This is the tolerance level that determines whether there has been enough change between frames or not to be considered as detected motion."

  


  Any help would be appreciated.

  


  (Apologies if the format of this question is wrong)

  


• How to fix the "No working C compiler found." problem for compiling x264 in Linux ?

  27 février 2023, par gc xu

  Firstly I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc...
I git clone the source code from https://code.videolan.org/videolan/x264.git.
Then, I run command ./configure, it shows

  


  ./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
No working C compiler found.


  


  I check the file "config.log". It shows :

  


  checking for -Werror=unknown-warning-option... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-warning-option   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=unknown-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=ignored-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=ignored-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
x264 configure script
Command line options: "--enable-shared" "--enable-static"

checking whether gcc works... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c -m64  -Wall -I. -I$(SRCPATH)     -m64  -lm -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
DIED: No working C compiler found.


  


  Plus I wonder is there something to do with nasm ? Becasuse I install nasm with some C grammer problems :

  


  ./config/config.h:659:16: error: duplicate ‘unsigned’
  659 | #define size_t unsigned int
      |                ^~~~~~~~
./config/config.h:659:25: error: two or more data types in declaration specifiers
  659 | #define size_t unsigned int
      |                         ^~~
In file included from /usr/include/string.h:633,
                 from ./include/compiler.h:89,
                 from asm/nasm.c:38:
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘__extension__’
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘)’ token
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
make[1]: *** [asm/nasm.o] Error 1
make[1]: Leaving directory `/mnt/nfs0/gengcheng/ffmpeg-5.0.2/nasm-2.15.05'
make: *** [all] Error 2


  


  I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc...
I want to install x264 to configure it in ffmpeg. Thanks for all your answers !