Changes

Here’s a command that encodes video and audio while maintaining high time accuracy:

Here’s a command that encodes video and audio while maintaining high time accuracy:

<pre>

<pre>

ffmpeg -i input.mp4 \

ffmpeg -i input.mp4 -c:v libx264 -preset slow -crf 18 -vsync cfr -g 30 -c:a pcm_s16le -ar 44100 -fflags +genpts -async 1 output.mp4

      -c:v libx264 -preset slow -crf 18 -vsync cfr -g 30 \

-c:v libx264: Encode video using H.264.

      -c:a pcm_s16le -ar 44100 \

-preset slow: Optimize for quality and compression efficiency.

      -fflags +genpts -async 1 \

-crf 18: Adjusts quality (lower = better; range: 0–51).

      output.mp4

-vsync cfr: Enforces constant frame rate.

• -c:v libx264: Encode video using H.264.

-c:a pcm_s16le: Encodes audio in uncompressed WAV format.

• -preset slow: Optimize for quality and compression efficiency.

-ar 48000: Sets audio sample rate to 48.0 kHz.

• -crf 18: Adjusts quality (lower = better; range: 0–51).

-fflags +genpts: Ensures accurate timestamps.

• -vsync cfr: Enforces constant frame rate.

-async 1: Synchronizes audio and video streams.

• -c:a pcm_s16le: Encodes audio in uncompressed WAV format.

• -ar 44100: Sets audio sample rate to 44.1 kHz.

• -fflags +genpts: Ensures accurate timestamps.

• -async 1: Synchronizes audio and video streams.

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</pre>