The problem with this error notice: "Automatic encoder selection failed Default encoder for format
mp4 (codec none) is probably disabled. Please choose an encoder manually.", aside from a missing
period, is that it doesn't indicate the encoder that FFmpeg was looking for. In this script:
ffmpeg^
-i "c:\8-bit ybr420 smpte170m vasc.mkv"^
-map 0 -c:v libx264 -c:a copy -c:s copy^
"c:\8-bit ybr420 smpte170m.mp4"
the encoder that is NOT found is NOT libx264. The encoder that is NOT found IS for subtitles and
there's no '-c:s copy' switch. So FFmpeg searches for the default encoder for subtitles. Without
looking at FFmpeg's source code, "Default encoder for format mp4 (codec none) is probably disabled"
seems like nonsense.
Fix: Replace this:
"Automatic encoder selection failed"
by this:
"Automatic subtitle encoder selection failed".
The tip: "Default encoder for format mp4 (codec none) is probably disabled" is not needed. Certainly
it is confusing.
--Mark.
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