Changes between Version 19 and Version 20 of Seeking

Timestamp:

Oct 20, 2015, 11:43:59 PM (11 years ago)

Author:

Roger Pack

Comment:

--

Seeking

@@ -74 +74 @@
 Note that you can use two different time unit formats: sexagesimal (`HOURS:MM:SS.MICROSECONDS`, as in `01:23:45.678`), or in seconds. If a fraction is used, such as `02:30.05`, this is interpreted as "5 100ths of a second", not as frame 5. For instance, `02:30.5` would be 2 minutes, 30 seconds, and a half a second, which would be the same as using `150.5` in seconds.
 
-== Seeking while doing a bitstream copy ==
+== Seeking while doing a codec copy ==
 
-Using `-ss` as input option together with `-c:v copy` might not be accurate since `ffmpeg` is forced to only use/split on i-frames. Though it will—if possible—adjust the start time of the stream to a negative value to compensate for that. 
+Using `-ss` as input option together with `-c:v copy` might not be accurate since `ffmpeg` is forced to only use/split on i-frames. Though it will—if possible—adjust the start time of the stream to a negative value to compensate for that.  Basically, if you specify "second 157" and there is no key frame until second 159, it will include two seconds of audio (with no video) at the start, then will start from the first key frame.  So be careful when splitting and doing codec copy.