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• ffmpeg concat + invalid data found when processing + check for valid avi file

  23 octobre 2022, par ssinfod

  I'm using ffmpeg to concatenate (merge) multiple avi files to a single avi file.
I'm using the following command.

  



  ffmpeg -f concat -i mylist.txt -c copy out.avi


  



  The list of files to merge is given in mylist.txt

  



  Ex 'mylist.txt':
 file 'v01.avi'
 file 'v02.avi'
 file 'v03.avi'
...
 file 'vxx.avi'


  



  However, there is a problem when one of the file is corrupted (or empty).
In this case, the video only contains the files up to the corrupted file.

  



  In this case, ffmpeg return the following errors :

  



  [concat @ 02b2ac80] Impossible to open 'v24.avi'
mylist.txt: Invalid data found when processing input


  



  Q1) Is there a way to tell ffmpeg to continue merging even if it encounters an invalid file ?

  



  Alternatively, I decided to write a batch file that check if my avi files are valid before doing the merging.
My second problem is that this operation takes more time that doing the merging itself.

  



  Q2) Is there a fast way to check if multiple avi files are valid with ffmpeg ? (and delete, ignore or rename them if they are not valid).

  



  Thanks in advance for your comments.

  



  ssinfod.

  



  For information, here is my current DOS batch file. (This batch is working but very slow because of the ffprobe to check if my avi are valids)

  



  GO.bat

  



  @ECHO OFF
echo.
echo == MERGING STARTED ==
echo.
set f=C:\myfolder
set outfile=output.avi
set listfile=mylist.txt
set count=1

if exist %listfile% call :deletelistfile
if exist %outfile% call :deleteoutfile

echo == Checking if avi is valid (with ffprobe) ==
for %%f in (*.avi) DO (
    call ffprobe -v error %%f
    if errorlevel 1 (
        echo "ERROR:Corrupted file"
        move %%f %%f.bad
        del %%f
    )
)

echo == List avi files to convert in listfile ==
for %%f in (*.avi) DO (
    echo file '%%f' >> %listfile%
    set /a count+=1
)
ffmpeg -v error -f concat -i mylist.txt -c copy %outfile%
echo.
echo == MERGING COMPLETED ==
echo.
GOTO :EOF

:deletelistfile
 echo "Deleting mylist.txt"
 del %listfile%
GOTO :EOF

:deleteoutfile
 echo "Deleting output.avi"
 del %outfile%
GOTO :EOF

:EOF


  


• avfilter/af_adynamicequalizer : rework processing

  7 octobre 2022, par Paul B Mahol

  avfilter/af_adynamicequalizer : rework processing
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/af_adynamicequalizer.c

• fftools/ffmpeg : move packet timestamp processing to demuxer thread

  10 août 2022, par Anton Khirnov

  fftools/ffmpeg : move packet timestamp processing to demuxer thread
  Discontinuity detection/correction is left in the main thread, as it is
  
  entangled with InputStream.next_dts and related variables, which may be
  
  set by decoding code.
  Fixes races e.g. in fate-ffmpeg-streamloop after
  
  aae9de0cb2887e6e0bbfda6ffdf85ab77d3390f0.
  

  • [DH] fftools/ffmpeg.c
  • [DH] fftools/ffmpeg_demux.c