[FFmpeg-user] Yes or No? About the processing pipeline.

[Carl Zwanzig]

On 6/18/2025 4:42 AM, Mark Filipak wrote:
> It fails with a nonsense error message.

If you're referring to-
[sost#0:2 @ 0000000004c5ec80] Automatic encoder selection failed Default 
encoder for format mp4 (codec none) is probably disabled. Please choose 
an encoder manually.
[sost#0:2 @ 0000000004c5ec80] Error selecting an encoder

That is definitely not "nonsense" because you don't immediately 
understand it; seems pretty obvious to me and I'm sure you use ffmpeg a 
lot more than I do.


The #0:2 refers to a stream, for which it can't select a codec. A couple 
of lines above we see

   Stream #0:2: Subtitle: dvd_subtitle (dvdsub), 720x480

which tells us about that stream.

So ffmpeg can't automatically select a codec for dvdsub into an MP4. 
-Why- it can't is another question but not one that would be answered by 
a fairly generic error message.

This is not rocket science.

z!