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Synchronize video and audio streams
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ffmpeg -i input_file -itsoffset 0.125 -i input_file -map 1:v -map 0:a -c copy output_file
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A command to slip the video channel approximate 2 frames (0.125 for a 25fps timeline) to align video and audio drift, if generated during video tape capture for example.
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+ - ffmpeg
- starts the command
+ - -i input_file
- path, name and extension of the input file
+ - -itsoffset 0.125
- uses itsoffset command to set offset to 0.125 of a second. The offset time must be a time duration specification, see FFMPEG Utils Time Duration Syntax.
+ - -i input_file
- repeat path, name and extension of the input file
+ - -map 1:v -map 0:a
- selects the video channel for itsoffset command. To slip the audio channel reverse the selection to -map 0:v -map 1:a.
+ - -c copy
- copies the encode settings of the input_file to the output_file
+ - output_file_resync
- path, name and extension of the output_file
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