re-save .jpg to .TGA with alpha in commandline

[marcorocchini]

Hi
a cat here,

however

please can you help me!?

I need to re-save (in batch mode) a single .jpg source to a .TGA file with alpha channel

I need to do the process via commandline so I need a suitable tool that do this via commandline

thanks

[poisondeathray]

Did you want a "dummy" alpha channel, with alpha channel value of 255 ?

for %a in ("*.jpg") do ffmpeg -i "%a" -vf format=bgra -c:v targa -frames:v 1 "%~na.tga"

[marcorocchini]

the commandline works but my program don't parse the tga outputted from ffmpeg (Cannot read from the compressed image), so is there an alternative to ffmpeg?

[poisondeathray]

Try adding -rle 0

Encoder targa [Truevision Targa image]:
    General capabilities: dr1
    Threading capabilities: none
    Supported pixel formats: bgr24 bgra rgb555le gray pal8
targa AVOptions:
  -rle               <int>        E..V....... Use run-length compression (from 0 to 1) (default 1)

[marcorocchini]

oh it works