convert .flv to .mkv losslessly

[lovelove]

Hi. Do you know a way to convert/remux .flv to .mkv (while preserving video and audio track, i.e. NOT transcoding) ?
I didn't find anything in the tool section. Thank you.

[bat999]

Hi. Do you know a way to convert/remux .flv to .mkv (while preserving video and audio track, i.e. NOT transcoding) ?

Yes, I would use FFmpeg like this:-

 ffmpeg -i filename.flv -vcodec copy -acodec copy filename.mkv

[poisondeathray]

another gui based option would be flvextract to extract the audio & video, then mkvtoolnix to put the audio & video into mkv container . If this is a variable frame rate FLV, you have to mux the extracted timecodes in too with the timecode function in mkvtoolnix , or it will be out of sync

[shaema]

Use Avidemux: load your flv file, set video=copy, audio=copy, format=mkv. click File>Save>Save Video. Give it a name with extension [.mkv] such as myvideo.mkv.

[DarrellS]

Super in copy mode is another option. You can convert multiple files at one time. I like the ffmpeg option but the file name can't have spaces in it.

For batch conversion with ffmpeg...

for %%a in ("*.flv") do ffmpeg -i %%a -vcodec copy -acodec copy %%~na.mkv

(place ffmpeg.exe in the folder that you want to convert)

[TheSoundtrack]

there are a ton on google, but i would recommend EmicSoft. It also acts as a professional editor, so you can adjust video effects (brightness, contrast, saturation), trim video segments, and crop video playing area.

Also, a strong recommendation on an FLV player/converter is www.FLV.com/

[ic4andi]

Ok but how do you mux multiple .flv's into one .mkv in the ffmpeg command line?

[DarrellS]

Use Andy's FLVjoin to join the FLVs and then convert to MKV.

[richter03]

Use FLV Extract to extract video, audio and timecode in flv file and use MKVtoolnix for mux them to mkv (don' forget to browse your timecodes in general track options tab).