Merge mp4 files without reencoding with Virtualdub ?

[ramaflore]

Hi,

I'd like to know if it's possible to merge or join a few mp4 files without reencoding with Virtualdub.

Please let me know if we can do it, thank you.

[Baldrick]

You can't save as/output as mp4 directly in virtualdub.

Merge with avidemux or mp4box instead.

[hech54]

And if they are completely unrelated videos(not from the same camera - not from the same encode)....you will be re-encoding no matter what you use.

[ramaflore]

All the extracts mp4 files are coming from the same video.

And if they are completely unrelated videos(not from the same camera - not from the same encode)....you will be re-encoding no matter what you use.

[ramaflore]

About Mp4box :

What's mux and demux, please ?

Unfortunately with Mp4Box, I hear that it lacks a video preview function with GUI timecode selector.

Do I need previously installed Mp4box, if I install Mp4Box GUI ?

You can't save as/output as mp4 directly in virtualdub.

Merge with avidemux or mp4box instead.

[hello_hello]

As long as you don't mind MKV as the output, MKVMergeGUI will open MP4s (and other file types), append and split them etc and save the output as MKV. It's pretty easy to use.

[ramaflore]

I tried Yamb, beta version but the join function doesn't work and the preview on the split window doesnt work.

[poisondeathray]

Why do you need a preview ? Are you editing as well ? or only appending them end to end ? What do you mean exactly by "merge" ?

Are your MP4 files using different specs ? Check with mediainfo (view=>text)

Since you said they were "coming from the same video" , how were they "cut" in the first place ?

What's mux and demux, please ?

mux is shorthand for "multiplex" or putting elementary audio & video into a container like MP4

demux is short for "demulitiplex" or extracting elementary audio & video

[aazerty]

Hi ramaflore :

Try :

ffmpeg -y -i "source1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source1.ts"
ffmpeg -y -i "source2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source2.ts"
ffmpeg -y -i "source3.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source3.ts"
ffmpeg -y -i "source4.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source4.ts"

ffmpeg -y -i concat:"source1.ts|source2.ts|source3.ts|source4.ts" -absf aac_adtstoasc -c copy -f mov "destination.mp4"

Cheers .

[Selur]

@aazerty: why '-f mov' in combination with .mp4 as extension? Wouldn't that create a .mov file with a .mp4 extension?
Why not use '-f mp4' ?

[aazerty]

Hi ,

That is what it is said , in the page ( in french ) :
http://hd3g.tv/b/2012/08/coller-des-fichiers-mp4-entre-eux-avec-ffmpeg

Under "Assemblage" .

Cheers .

[DarrellS]

As long as you don't mind MKV as the output, MKVMergeGUI will open MP4s (and other file types), append and split them etc and save the output as MKV. It's pretty easy to use.

This is what I do. Then I either use MP4Box or ffmpeg to copy AVC/AAC to mp4 container. Usually not neccessary but some media players expect to see aac in mp4 and will refuse to play the file. If I'm converting a file that I've ripped from disc then I use the original ac3 and create avc/ac3 mkv. I try and steer clear of mp4 if possible.

[ramaflore]

I need the preview to cut manually with the marker while I'm watching the video. No, I'm not editing the video, I only need a direct copy without loss of
quality.

Merge or join files are the same for me.

Same specs.

The first time I cut was with Boilsoft splitter.

Why do you need a preview ? Are you editing as well ? or only appending them end to end ? What do you mean exactly by "merge" ?

Are your MP4 files using different specs ? Check with mediainfo (view=>text)

Since you said they were "coming from the same video" , how were they "cut" in the first place ?

What's mux and demux, please ?

mux is shorthand for "multiplex" or putting elementary audio & video into a container like MP4

demux is short for "demulitiplex" or extracting elementary audio & video

[ramaflore]

Thanks aazerty but I don't want to transcode or to convert into mpeg file, only a direct copy from the original with the same specs.

Hi ramaflore :

Try :

ffmpeg -y -i "source1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source1.ts"
ffmpeg -y -i "source2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source2.ts"
ffmpeg -y -i "source3.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source3.ts"
ffmpeg -y -i "source4.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "source4.ts"

ffmpeg -y -i concat:"source1.ts|source2.ts|source3.ts|source4.ts" -absf aac_adtstoasc -c copy -f mov "destination.mp4"

Cheers .

[Detmek]

In that case use Avidemux. It has preview option you need.

[DarrellS]

You are not going to be able to get a precise cut without using a pay program like VideoReDo TV Suite. You can try Free Video Editor but be careful when installing or you'll get adware. It seems to be the easiest to use and will work for other formats also. Not guaranteed to get frame accurate editing but it does save without re-encoding. Avidemux is way to buggy for me. Especially with mp4.

[ramaflore]

Avidiemux, is only for mp4. I'm looking for one program that can deal with all majors videos files.

Which alternative programs to Yamb, please ?

[aazerty]

Hi ramaflore ,

Create a batch file : 'xxx.bat' , put it in the same directory where are *.mp4

@echo on
copy /B *.mp4 fusion.mp4
pause
:fin

OR

Create a batch file : 'yyy.bat' , put it anywhere
( original files are at 'C:\Users\Gerard\Desktop\videos' )
( final file will be on your desktop 'C:\Users\Gerard\Desktop' )

@echo on
copy /B C:\Users\Gerard\Desktop\videos\*.mp4 C:\Users\Gerard\Desktop\fusion.mp4
pause
:fin

Regards .

[poisondeathray]

That's "editing" . Merging implies joining videos together. "cut manually with a marker" implies editing . (Cutting is not the same thing as merging)

Anyways, try videoredo, solveigmm video splitter, tmpgenc smart renderer

[Tom Saurus]

ramaflore: The videotovideo media converter program has a joining feature. If the specs match up completely you should be able to join the videos and by using the direct stream option there would be no re-encoding.

[racer-x]

I use MpegStreamClip to cut and join mp4 (no re-compression).

1) File > Open Files
2) Control-click to select multiple clips
3) File Save As > .mp4

[ramaflore]

Could I cut and join wmv, flv and mov files ?

I use MpegStreamClip to cut and join mp4 (no re-compression).

1) File > Open Files
2) Control-click to select multiple clips
3) File Save As > .mp4

[ramaflore]

If I have a different names files from different videos but all are wmv files and I wanted to enumerate or to list only a few files by her name, how can I do, please ?

Hi ramaflore ,

Create a batch file : 'xxx.bat' , put it in the same directory where are *.mp4

@echo on
copy /B *.mp4 fusion.mp4
pause
:fin

OR

Create a batch file : 'yyy.bat' , put it anywhere
( original files are at 'C:\Users\Gerard\Desktop\videos' )
( final file will be on your desktop 'C:\Users\Gerard\Desktop' )

@echo on
copy /B C:\Users\Gerard\Desktop\videos\*.mp4 C:\Users\Gerard\Desktop\fusion.mp4
pause
:fin

Regards .

[ramaflore]

Videoredo is it able to cutting and joining videos files like, mp4, wmv, mov, flv without re-encoding ?

That's "editing" . Merging implies joining videos together. "cut manually with a marker" implies editing . (Cutting is not the same thing as merging)

Anyways, try videoredo, solveigmm video splitter, tmpgenc smart renderer

[ramaflore]

This program needs quick time previously installed and I don't want to install QT.

I use MpegStreamClip to cut and join mp4 (no re-compression).

1) File > Open Files
2) Control-click to select multiple clips
3) File Save As > .mp4

[racer-x]

This program needs quick time previously installed and I don't want to install QT.

I use MpegStreamClip to cut and join mp4 (no re-compression).

1) File > Open Files
2) Control-click to select multiple clips
3) File Save As > .mp4

I use QuickTime Alternative. It works well with mp4, mov files. There are better tools for other types.

[Budman1]

Just had occasion to do this (add mp4's together) and found that if you use the Binary method to join (copy /b video.ext + video2.ext output.ext) you will get a video that has 2 mdat,2 moov, etc. This result may play in some but not all players and some streaming Servers like Plex wil stop after the first video plays.

What does work is if you join with FFMPEG type editors.


This video will have 1 Mdat and 1 Moov atoms with 2 trak atoms that will play on most if not all players/Servers. FFMPEG is fairly easy to use and requires no installation and since you have a 'Few' to join it should work well for this.

UPDATE: EXAMPLE WRONG WILL POST CORRECT LATER... SORRY about that.

Correct method would be to be sure only video/audio present and use the concat method with file list. Make a text file with a file similar to this and give it a name such as Filelist.txt:

file 'C:\Users\Bud\Desktop\[dp]Manjandani-1_Extract_1.mp4'
file 'C:\Users\Bud\Desktop\[dp]Manjandani-1_Extract_2.mp4'

Then concat with:
ffmpeg -f concat -i FileList.txt -c copy "C:\Users\Bud\Desktop\_Joined_2.mp4"

[aazerty]

Hi Budman1 ,

Thanks . The commands-line works .

Regards .

[ramaflore]

Wich Gui for ffmpeg program did you use to make those screenshots ?

Do you have the syntax for splitting any video file ?

I splitted a wmv video file in 2 files, then I joined with ffmpeg, but the video can't play on MPC. Nevertheless, I can play it on WMP and VLC. Why ?

[El Heggunte]

I splitted a wmv video file in 2 files, then I joined with ffmpeg, but the video can't play on MPC. Nevertheless, I can play it on WMP and VLC. Why ?

Because WMP and VLC are designed to deal with borked files. MPC-HC, which uses LAV Splitter, is not.