MP4 specifically refers to the MPEG-4 part 14. A standard audio and video container that is part of the MPEG-4 specification developed by ISO / IEC.

learn more… | top users | synonyms

30
votes
8answers
117k views

How can I merge two mp4 files without losing quality?

I have two high-quality mp4 files, which are of two parts of the same show. I want to merge them together into 1 file, and I usually use VirtualDub to merge my files... But it doesn't seem to support ...
8
votes
9answers
664 views

Convert mp4 to mp3

I would like to convert mp4 (video included) to mp3 (without video). what is the best way of doing this apart from using audacity (or similar software) and performing manual conversion (recording as ...
29
votes
8answers
22k views

Extracting audio from MP4 video into MP3

I downloaded a few MP4-encoded videos from which I'd like to extract the audio stream into MP3 files for easy listening on my digital player. Most likely, VLC can do this, but the instructions ...
5
votes
3answers
1k views

How can I remove multiple segments from a video using FFmpeg?

I am trying to delete a few sections of a video using FFmpeg. For example, imagine if you recorded a show on television and wanted to cut out the commercials. This is simple with a GUI video-editor; ...
24
votes
9answers
38k views

How to convert WMV to MP4?

How can a set of WMV files be converted to MP4 so I can import them to my Apple TV?
26
votes
4answers
31k views

Joining H264 *without* re-encoding

I have two halves of a single show in two .MP4 files, encoded in H264. I would like to join them without re-encoding. Is this possible? I managed to create a joined video as a Quicktime file (.mov) ...
11
votes
6answers
28k views

How can I merge or concatenate two or more MP4 files creating another MP4 file? [duplicate]

How can I concatenate or merge 2 or more MP4 files, in a final output MP4 file also? I have tried in the DOS window to use the COPY command (I have read it somewhere) but it doesn't function well.
3
votes
1answer
6k views

how do I convert .iso to .mp4 without mounting with ffmpeg

The problem is - I want to convert .iso with dvd to .mp4 (h264/ac3), but I cannot mount it via mount -o loop, because I'm on a virtual machine that doesn't allow to do that. Googling doesn't help. ...
2
votes
3answers
8k views

Which free video editing tool can I use in windows to slice an mp4 file?

I would like to cut a portion of a podcast which is a mp4 file and upload to youtube. Which is the easiest way to do it?
3
votes
4answers
17k views

Convert MP4 to OGG (Video)

Does anyone know a way to convert .mp4 video to .ogg video (in Windows)? None of the converters I've seen online seem to do the job.
22
votes
1answer
14k views

FFMPEG Splitting MP4 with Same Quality

I have one large MP4 file. I am attempting to split it into smaller files. ffmpeg -i largefile.mp4 -sameq -ss 00:00:00 -t 00:50:00 smallfile.mp4 I thought using -sameq would keep the same quality ...
12
votes
1answer
43k views

Handbrake settings to convert MKV to MP4 while retaining the original quality

I have a ton of MKV files I need to convert to MP4 and my chosen software is Handbrake. I'm stuck on which settings would be best for the conversion. I want to retain full quality. Do I just convert ...
10
votes
3answers
19k views

How to open and repair an m4v or mp4 video file?

Yesterday I was filming a scene with my phone but suddenly the application crashed and when I try to open the m4v generated it says that is corrupted. I have downloaded the video files (around 36MB) ...
17
votes
1answer
30k views

Converting FLV to MP4 Using FFMPEG and Preserving the Quality

Im trying to use ffmpeg to convert my flv files to mp4 to play them on iOS devices but the converted video has a much worse quality than the original one. Here is the command i use: ffmpeg -i ...
12
votes
6answers
9k views

How can I convert .mov to mp4?

I have a .mov file I've just recorded that's 600MB, I want to convert it to a smaller .mp4 file. How can I do this?
2
votes
3answers
3k views

Reduce size of MP4

I have a MP4 file with a lengh of 22:44. Here are the details: Video: width: 720 px height: 404 px data bitrate: 1022 kBit/s overall bitrate: 1182 kBit/s fps: 24 codec: H264 - MPEG4 AVC ...
16
votes
5answers
11k views

FFMPEG convert flv to mp4 without losing quality

Currently I'm converting .flv flash files to .webm and .mp4 files to be used with an HTML5 video player. _ I use this ffmpeg command for WEBM: ffmpeg -i filename.flv -vcodec libvpx -acodec libvorbis ...
2
votes
2answers
5k views

What is the best way to downscale mp4 video while keeping it as sharp as possible?

I've got an .mp4 file that's currently 830x1100 (it's a screencast) that I need to resize down to 114x150. I've been experimenting for hours with ffmpeg settings and nothing comes out looking nice and ...
4
votes
3answers
5k views

Synchronizing audio and video using MP4Box / ffmpeg to concatenate files

I have two H.264 encoded MPEG-4 files that I need to concatenate. I have been using MP4Box for this task by first ensuring the files are encoded identically (even went so far as to compare output from ...
1
vote
0answers
114 views

How to merge 2 mp4 files with 1 atom?

I'm merging two mp4 files for video streaming. the problem is, the merged file contains two atoms, 1 atom from each file and that is a problem when it comes to streaming. the client needs to wait ...
1
vote
1answer
3k views

Google Chrome not playing mp4 files

Videos stopped after 1 frame, I have tried local mp4 files, vimeo html5 videos and coursera videos and they all stopped after one frame and stopped loading. My system is 64-bit Windows 8, anyone have ...
1
vote
1answer
3k views

embed srt into mp4/m4v

i have an converted .mp4 video file (or .m4v) + an .srt file. Is there a way for me to embed this .srt file into that mp4 file without running a complete convertion?
0
votes
2answers
626 views

Best utility for converting Flip Mino HD videos to Windows Movie Maker compatible format?

I've got a Flip Mino HD and am looking for a free utility that will convert the default mp4 video format into something that is Windows Movie Maker (Live or Standard) friendly. What do you guys ...