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• Add metadata while converting MKV to MP3 with FFMPEG

  17 août 2020, par Elderhoard

  I am trying to convert MKV files to MP3, while adding metadata and album artwork through a batch file. I am generating a PNG through FFMPEG, then converting to MP3 while adding metadata, and finally adding the album artwork i got initially.

  


  I have tried adding the metadata while converting to MP3 and while adding the artwork to no avail. I read something about it flushing the buffer too quickly but thought I might be able to get around it by adding it while converting it.

  


  Individually, all parts work, but I can't get it to add the title and artist to the metadata, or at least in a place where VLC can read it. any suggestions ?

  


  @echo off
::Extracts a PNG thumbnail 
for %%A in ("*.mkv") do (ffmpeg -ss 30 -i "%%A" -qscale:v 4 -frames:v 1 "%%~nA.png")

::Convert from MKV to MP3 and adds title and artist based on file name delimited by "-" eg Metallica - Enter Sandman.mkv
SETLOCAL ENABLEDELAYEDEXPANSION
for %%A in ("*.mkv") do (
    set filename=%%~nA
    set artist=
    set song=
    echo "!filename!"

    for /F "tokens=1,2 delims=-" %%G in ("!filename!") do (
        set artist="%%G"
        set song="%%H"
        echo !artist!
        echo !song!
    )

    echo !song! by !artist!

    ffmpeg -i "%%A" -b:a 192K -id3v2_version 4 -write_id3v2 1 -metadata title="%song%" -metadata artist="%artist%" -flush_packets 0 -vn "%%~nA.mp3"
)

::Add Artwork to MP3
for %%A in ("*.mp3") do (ffmpeg -i "%%A" -i "%%~nA.png" -map 0:0 -map 1:0 -c copy -id3v2_version 3 "UPDATED%%~nA.mp3")


  


• avcodec/mpegvideo : fix ac/dc_val and coded_block table sizes

  3 janvier 2014, par Michael Niedermayer

  avcodec/mpegvideo : fix ac/dc_val and coded_block table sizes
  With interlaced vc1 it was possible that accesses could happen outside these
  
  tables before this.
  Regression since 017e234c204f8ffb5f85a073231247881be1ac6f
  
  Reproduced with a sample from Mateusz "j00ru" Jurczyk and Gynvael Coldwind
  
  Fixes (again) : 480i30__codec_WVC1__mode_2__framerate_29.970__type_2__preproc_17.SIGFPE.bfa.390.wmv
  
  No releases are affected by this
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/mpegvideo.c

• vulkan_h264 : reject end_frame being called without valid session parameters

  20 mai 2023, par Lynne

  vulkan_h264 : reject end_frame being called without valid session parameters
  When seeking through MBAFF-coded H264, this can happen. Decoding calls end_frame
  
  without calling start_frame. We are unable to decode this, as no frame
  
  state has been set.
  Happens for both VAAPI and Vulkan. Could be an issue elsewhere, hence
  
  the individual commit.
  

  • [DH] libavcodec/vulkan_h264.c