Merge two FLV files

[goheadtry]

How can I merge two FLV files with software that doesn't cost anything? and what do I need to do this?

[TaoTeWingChun]

Have you tried the copy command:

Syntax:

COPY [d:][path]filename1+[d:][path]filename2 [d:][path]filename3

Purpose: Copies or appends files. Files can be copied with the same name or with a new name.

To copy and combine (concatenate) the files TEST1.DOC and TEST2.DOC to a new file, TEST3.DOC, enter:

copy test1.doc+test2.doc test3.doc

Good Luck!

TTWC

[goheadtry]

this doesn't work it only plays the first one when they are merged

[Ai Haibara]

You can try using FLV Extract. That will generally extract an AVI video stream and MP3 audio stream from an FLV. (Note: you'll need to have codecs installed on your system to be able to view or work with the resulting AVIs - FLV or VP6. ffdshow can handle both, if you prefer.) You can mux the MP3 audio streams back into the AVI files, and then use whatever AVI-joining program you like to join the AVIs, and convert the result back to FLV.

Of course, that's one way of doing it. I don't know of any way to do it without converting the files or using FLV Extract (which just extracts, not converts).

[goheadtry]

Does any one know of a simple way to do this?
They are for web use that's why I just wanted to merge them the FLV I want to add to the front of the other videos is 3 seconds with my site logo and sound FX
Can this be done with FLASH?
Or is there another method of doing this?
Here is an example of one of the videos
http://www.technologyforever.com/v1.php

[vhelp]

Q: How do I join (merge) two FLV files ?

A: After trial n error, here's how to do it using mencoder, via DOS console command line:

--> mencoder -oac copy -ovc copy -o c:\video.flv c:\a.flv c:\b.flv


Below is a demo of the result from JOIN'ing two flv video files together to make one final video,
but without re-encoding:

--> vhelp.demo.two.joined.video.files.rar -- 327 kb

Notes:
[x] Be sure that the video's are the same in attributes.. ie, fps, audio, and resolution.
[x] I have not tested against two sources to see what errors may pop up .. it wasn't
imortant to me for this response.
[x] video A.FLV is 212 frames
[x] video B.FLV is 149 frames
[x] video VIDEO.FLV frames is aprox 361 (although vdub start its frames at zero)

-vhelp 4395

[Baldrick]

Or avidemux, https://forum.videohelp.com/topic336444.html#1749270

[45tripp]

--> mencoder -oac copy -ovc copy -o c:\video.flv c:\a.flv c:\b.flv

mencoder -of lavf -oac copy -ovc copy -o video.flv a.flv b.flv

Doesn't work with flash8

[Placio74]

--> mencoder -oac copy -ovc copy -o c:\video.flv c:\a.flv c:\b.flv

mencoder -of lavf -oac copy -ovc copy -o video.flv a.flv b.flv

Doesn't work with flash8

VP6F?
MEncoder use FFmpeg code (lavf).
FFmpeg don't support VP6F - only FLV1.

(Of course first syntax (without -of lavf) join files and save in AVI container.)

[45tripp]

i wasn't asking anything

[Placio74]

I'm mistake.
FFmpeg can't encode VP6F, but can decode and copy.

Well...

mencoder -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -ovc copy -oac copy 1_part.flv 2_part.flv -o joined.flv

File is playable, but not seekable... hmm, remux...

[EDIT]I'm check again other files and OK, hmm...[EDIT]

ffmpeg -i joined.flv -vcodec copy -acodec copy final.flv

OK, playable and seekable.

[EDIT]Only one stupid problem after remux - 1000 FPS.[EDIT]

Tested with MEncoder dev-SVN-r23833-4.2.0 and FFmpeg SVN-r10141.


Alternatively - latest builds Avidemux and Movica.

[45tripp]

nice,
i didn't even think to try.

ffmpeg -i 4-1.flv -i 4-2.flv -vcodec copy -acodec copy out.flv

did what mencoder wouldn't

[Placio74]

nice,
i didn't even think to try.

ffmpeg -i 4-1.flv -i 4-2.flv -vcodec copy -acodec copy out.flv

did what mencoder wouldn't

I'm check this before.
This syntax not join files (copy only one part).

[45tripp]

true

i was having trouble with framerate
this worked for the vp6 i had

mencoder -fps 29.97 4-1.flv -fps 29.97 4-2.flv -o oa.flv -of lavf -ovc copy -oac copy

seekable

tried movica, won't load any flv.
tried avidemux, no audio.

[vhelp]

Hi Placio74

VP6F?
MEncoder use FFmpeg code (lavf).
FFmpeg don't support VP6F - only FLV1.

Actually, it does -- at least the version I was using, though in the demo
script I posted above, it was transcoding (copying) aka, muxing
the VP6 (vfw flash version) video .. and in this demo script, I was showing
the JOIN 'ing aspects of two videos which happend to be flash and was
also requested in the topic itself. Anyway.

I'll asume you were trying to point out a posible issue with vp6 codec and ffmpeg ??

Actually, it's vp61 or vp62 that I use vs. the standard flv1 that ffmpeg
(and I think) mencoder uses through lavc or whatever it uses, internally,
and that YouTube uses, also.

So I'm guessing that you looked at the demo sample I posted above, which
housed 3 video files, and was (is) using the vp61 (FLV or Flash via vfw
[video for windows] format) codec.

Actually, YouTube can decode a great many other video codec formats,
even though they recommend (and prefer) divx/xvid.

-vhelp 4398

[Placio74]

Hi Placio74

VP6F?
MEncoder use FFmpeg code (lavf).
FFmpeg don't support VP6F - only FLV1.

And next post...

I'm mistake.
FFmpeg can't encode VP6F, but can decode and copy.
...

I'm can't download - vhelp.demo.two.joined.video.files.rar.
Please upload again.
[EDIT]OK, i'm add right url...
Nothing unusual - it's just join and change container to AVI...
(Hmm... MEncoder... possible problems with VFR FLV's.)
[EDIT]

I'm know about this ( )...
https://forum.videohelp.com/topic333660-30.html#1741011
(very interesting)

[garbagea]

tried movica, won't load any flv.

You will need to have ffdshow and the flvsplitter installed before Movica starts recognising .flv. See http://vani.bhargav.googlepages.com/movica%3Aflashconfig

[Kid Boruto]

You can try using FLV Extract. That will generally extract an AVI video stream and MP3 audio stream from an FLV. (Note: you'll need to have codecs installed on your system to be able to view or work with the resulting AVIs - FLV or VP6. ffdshow can handle both, if you prefer.) You can mux the MP3 audio streams back into the AVI files, and then use whatever AVI-joining program you like to join the AVIs, and convert the result back to FLV.

Of course, that's one way of doing it. I don't know of any way to do it without converting the files or using FLV Extract (which just extracts, not converts).

What program should I use to combine the aac audio file and .264 video file into an .avi video file?

[k.]

To merge FLV files try Andy's FLV Joiner

What program should I use to combine the aac audio file and .264 video file into an .avi video file?

It's not recommendable to do that but can be done with avc2avi + AVIMux GUI. It's better to put those in mkv or mp4 containers.

[Lady Colour]

Merge two files in one,i think you need to use a program to help you, there are many program can help you, some cost money, some free...good luck