How can I remove segment from a video using avconv?

Question

How can I remove one, or multiple segments from a webm video using avconv (without reencoding)?

I'm not sure if there is a more elegant solution, but you could create clips of wanted video individually using time splicing. — earthmeLon, Feb 27 '16 at 21:24
Note: You will probably need to re-encode, but at a lossless rate. (See P-Frames and B-Frames) — earthmeLon, Feb 27 '16 at 21:31
The question is a bit unclear. Do you want to make a new video out of the webm video, without the removed segments? If yes, you can use the command above for the parts you want to KEEP, then concatenate those parts. — theodorn, Feb 27 '16 at 21:35

score 2 · Answer 1 · answered Feb 27 '16 at 22:42

To remove a single segment of a webm file you can use the standard method of seeking to a particular section of your file and then specifying a time duration to extract.

For example the following will take a section from 1 minute into a file and copy 60 seconds following this into another file:

avconv -ss 00:01:00 -i video.webm -t 60 -c copy cut.webm

To extract multiple segments of a webm file you can use avconv's basic stream segmenter. For example the following will split a webm video into 60 second segments and generate a playlist file as well:

avconv -i test.webm -c copy \
       -f segment -segment_time 60 -segment_list list.pls \
       output%03d.webm

A few choices to make with the segmenter but the above examples covers the basics...

Good answer. I tested it with segment_time = 10 sec and a 1:04 long file. A roughly one minute long file seems was split into seven files. The time stamps were a bit strange in VLC. Each file was reported at the added time length of all the files before, including the file itself. However each file played at a shorter time, and the whole playtime added up to 1:04, same as the original file. — theodorn, Feb 29 '16 at 11:35

How can I remove segment from a video using avconv?

1 Answers1