(Video: h264, none, 1280x714): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (ac3 (native) -> mp3 (libmp3lame))
Too many packets buffered for output stream 0:1.
[libmp3lame @ 000002383e55ac00] 2 frames left in the queue on closing
Conversion failed!

 * 인코딩 오류가 발생했습니다.

 >> 속도 0.00x 진행시간 00:00:00

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