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

0
votes
1answer
28 views

Play mp4 video in Internet Explorer 11 with security level set to high

I am using the html5 tag to embed mp4 videos on a site. They play well in all browsers except on IE-11 but only when the security level is set to high (if security level downgrade to medium video ...
0
votes
0answers
37 views

Getting an mp4 to play on iOS Safari with ffmpeg

I have a script that cuts and splices some video from youtube with ffmpeg to make an mpeg thumbnail. The final result is an mp4 that runs fine with the HTML <video> tag on Mac OSX Safari, ...
-1
votes
0answers
13 views

How do I convert pvr to mp4?

I have TV box called GTPL for Channel subscription. In that there is a facility to record the show. But it saves the video in "pvr" format that I can't play it in the computer or any other device? So ...
2
votes
0answers
19 views

Any empirical length limits or caveats about MP4's of 7400 seconds?

I was investigating a curious issue I have with the playback of certain MP4 files on my BluRay player; in particular, it seemed files over two hours simply would not play (player locked up). As I ...
1
vote
1answer
23 views

any one have a workaround in Linux for firefox's bogus “video can't be played because the file is corrupt” message

Systems are Xubuntu 14.04.2, 64-bit running (currently) Firefox 37.0.2 (provided by Canonical). attempts with firefox to open training videos by clicking on the website-provided links at (e.g.) ...
0
votes
0answers
12 views

Issues streaming movies with VLC from my debian server

I am trying to stream movies from my linux server that I connect to via SSH. I go to VLC and networking and I use SFTP to get to my server and my file. ...
0
votes
1answer
21 views

How do I use command line to make an mp3 file an Mp4 file with visualisations? Is it possible to batch convert a folder with MP3's into videos?

I have a folder filled with mp3 files. I would like to render them as mp4 video files with music visualisations - is there a way to do this though command line?
0
votes
1answer
97 views

.MKV to .MP4 with 2 soundtrack (audio)

I found this thread: Handbrake settings to convert MKV to MP4 while retaining the original quality And I can "convert" .MKV to .MP4 with the following code: for %%a in ("*.mkv") do ...
0
votes
0answers
98 views

FFMPEG concat demuxer — how to make mp4 file formats compatible

I need to automate mp4 concatenation server-side and I'm using FFMPEG. I will get uploads of mp4 files and I want to attach a Title.mp4 and End.mp4 to each one. I am also overlaying a soundtrack (the ...
0
votes
0answers
16 views

Sony Vegas MP4 video file plays only bugged audio

I have a youtube intro, it works in every video player (VLC, WMP) and the mp4 itself renders correctly when uploaded to youtuve but it doesn't work when I import it to vegas, which is it's intended ...
-1
votes
1answer
38 views

Turn MP4 into an animated GIF [duplicate]

Not sure if this a specific photoshop related issue or if there's another workaround but I have a 5 second MP4 file which has 5 or 6 multiple photos stitched together, is there a way of turning it ...
0
votes
1answer
49 views

MKV to MP4 with hardcoded subs (how can I delay subtitles?)

I read on another question here on superuser that for converting from MKV to MP4 and hardcoding subs i have to use mkvextract and avidemux, i tried to do it, and basically it worked but... the ...
0
votes
1answer
105 views

ffmpeg to split mp4 file into segments… after first segment, audio unsynced

Nb: I incorrectly asked this question at stackoverflow I've used the ffmpeg command line shown in this question to split MKV files perfectly for a long time. Now i have some MP4 files that i'd like ...
0
votes
0answers
54 views

Editing metadata of H.264 MP4 videos

Windows lets me edit some metadata fields of H.264 encoded videos, such as “Title” and “Comments.” Such data seem to be preserved inside the file itself, which is what I want. Some applications make ...
-2
votes
3answers
85 views

MP4 files I download look pale and have colors misplaced [closed]

Ok, first things first: here's a screenshot from a recap I've downloaded. I guess if Neil Patrick Harris would host the ceremony back in 70s it'd look like that. There's this obvious offset of the ...
-1
votes
1answer
116 views

FFMPEG conversion from webm to mp4 intermittent on Ubuntu 14.04 [duplicate]

I am trying to convert .webm file that we get from google's screencastify to .mp4 file. I need it to be playable using Windows Media Player. I need it the file to be playing with all the WMP versions ...
-2
votes
3answers
414 views

Conversion from WebM to MP4 in Ubuntu is slow and bad quality

I have used the command ffmpeg -i input.webm -q:v 10 -c:a copy out.mp4 I also tried using avconv instead of ffmpeg. The conversion is successful but the quality is bad. Also it takes a lot of ...
2
votes
2answers
2k views

What's the easiest way to save a GIFV as a simple GIF?

Usually I open the context menu right clicking on the image. Now theres no option for "save image as", just options for the WEBM/MP4 format.
1
vote
1answer
454 views

Player for playing .mp4sub files

I have just downloaded a bunch of .mp4 files, which are accompanied by .mp4sub files. There are exactly three .mp4sub (named b, c and d) files for each .mp4 (named a). Example pattern: a_Astra.mp4, ...
2
votes
1answer
146 views

Remux/encode/convert MPG into MP4

I understand that it is impossible to edit metadata of MPG files (i.e. createdate), so I am looking for another way to "upgrade" my MPGs into a newer file format (preferred are formats that work both ...
1
vote
1answer
77 views

Saving .mp4 audio file as an mp3 file [closed]

If you were to save a .jpeg image as an .png image by simply changing the file extension, the image will successfully convert itself. Is there a way similar to this where I can save an .mp4 audio ...
0
votes
1answer
208 views

Converting DVD subtitles to text

I want to convert image-based subtitles (dvd_subtitle) to text-based subtitles (mov_text). I'm on OS X and would strongly prefer to use a free command-line based tool. My source data is either a DVD ...
0
votes
0answers
25 views

What parameters for lightweight HTML5 video with avconv? [duplicate]

I have this: avconv version 0.8.16-6:0.8.16-1, Copyright (c) 2000-2014 the Libav developers built on Sep 16 2014 23:10:48 with gcc 4.7.2 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'film.mp4': ...
5
votes
1answer
708 views

Not able to play a mp4 video purchased from Google Play

I purchased a movie from Google Play, then used Ant Video Player to download it. It's in MP4 format (or, at least, has an MP4 extension). When I try to open it in Windows Media Player, I get the error ...
0
votes
0answers
86 views

How to recover at least audio from broken recorded skype stream file?

I used "Free Video Call Recorder for Skype - DVDVideoSoft" to record an audio-video stream at skype conversation, but mp4 file got broken somehow, because I can not open it with any media player. I ...
-3
votes
3answers
104 views

How can I convert M4V video to MP4 format under my Windows 7? [closed]

I want to convert M4V videos to MP4 format format to play on my Android Tablet. Is there any recommended app for Windows computer?
1
vote
1answer
253 views

Swapping index of an MP4 file with FFMpeg

I run a web application which provides a few videos on it. Those videos are being displayed with a flash-video-player. Unfortunately, the index of those container-files is at the end of the file, so ...
0
votes
1answer
113 views

convert avi file to mp4 in linux

I have a bunch of avi files. I would like to convert them to mp4 format while retaining their small file size. I am using linux. Can someone please show step by step how to make the conversion, ...
0
votes
1answer
370 views

ffmpeg trying to hardcode subs using -c:s mov_text but fails

Please bear with me; I'm still learning the intricacies of ffmpeg and have hit a problem with subtitles. So, I am trying to change the container of a video from mkv to mp4, and simultaneously ...
1
vote
2answers
4k views

Is it possible to encode subtitles into a MP4 file for use on a PS3?

What's the correct or most up-to-date way of doing this? What program do I use? I want to watch a MP4 on my PS3 with subtitles 'hardcoded', because the PS3 doesn't recognize srt files.
2
votes
1answer
26 views

Looking for Video Player to Cycle Through Files Easily [closed]

I'd like a Video Player for MAC that know how to play most video formats (wmv, flv, mp4, avi, etc) but would let me cycle through the video files (in current folder) on a keypress (for example, right ...
1
vote
1answer
413 views

How can I repair a broken 3GP/MP4 file without a moov header?

I was recording audio two days ago and my phone suddenly died while doing so. I used MP4repair and a short clip of sound could be heard and they would be charging $80 to recover it. I thought it was ...
1
vote
1answer
41 views

What is a good way to make small audio edits to a very large mp4 file?

I have a video that I'd like to remove a few small things from its audio (coughs, phone vibrations, etc.). It's an mp4 and it's rather huge (over 4GB), and I'm not finding an editor that can manage to ...
2
votes
2answers
1k views

Remove .mp4 video top and bottom black bars using ffmpeg

I'm new to ffmpeg and I have heard that it has a filter for black. I want to remove black bars on top and bottom of the video so the video will be cropped to the remaining video without black bars. ...
0
votes
0answers
106 views

Why does VLC cut off the end of my video when transcoding?

I am trying to "bake in" a custom made subtitle file (Advanced SubStation Alpha) for a short (3:46) video. However, despite trying an assortment of commandline options, VLC seems to always cut off the ...
0
votes
1answer
75 views

How can I convert videos for Sony Xperia U on my Linux box?

I would like to send a few videos for my girlfriend, but I would ensure they are playable on her mobile phone. I want to carry out the encoding tasks on my Arch Linux box, because my PC is a low end. ...
1
vote
1answer
304 views

Edit “Media Duration” metadata on MP4 file

I have some video files which were converted to MP4, but not quite correctly. When I examine one with exiftool, I see these metadata values: Duration : 0:11:23 Track Duration ...
0
votes
1answer
405 views

ffmpeg: Adding Drawtext timecode & Watermark with -filter_complex, Stream Matching

I am trying to add the timecode with drawtext and put a logo with ffmpeg. The command line looks like this: ffmpeg -i INPUT.MP4 -i logo.png / -filter_complex ...
2
votes
1answer
5k views

How to change ffmpeg -threads settings

Working on a tube site. I'm running videos through ffmpeg on a linux dedicated server to convert to mp4. The server specs: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte ...
0
votes
0answers
141 views

How to concatenate MP4 files without losing embedded subtitle or audio tracks?

I have two MP4 files (mediainfo below), one is a short intro scene, and the other is the primary feature. Now, the primary video contains several audio tracks and embedded subtitles. I want to simply ...
0
votes
0answers
59 views

ffmpeg bitrate variating without reason

I got a mp4 video. I just want to split it in 4GB file parts using ffmpeg (to make it writeable on FAT32). C:\ffmpeg\ffmpeg.exe -i "%NAME%.mp4" -n -t %LENGTH% -codec copy "%NAME%_1.mp4" ...
0
votes
0answers
25 views

Troubles getting -t option with ffmpeg to produce a gif with the right fps and length

I created a movie using matplotlib (the Python graphing package). It is 10 seconds long. I attempted to produce a *.gif using ffmpeg with the following command: ffmpeg -i animation.mp4 -pix_fmt ...
3
votes
0answers
608 views

How to merge MP4 files with different bitrates?

I want to merge two or three MP4 videos with MPEG-4 AVC video codec and MP3 (sometimes MP3 Surround) audio codecs. Both audio and video can have different bitrate. If it will be possible, without ...
2
votes
1answer
758 views

Which FFmpeg command do I use to passthrough FLV to MP4?

I've a number of downloaded FLV files which I would like to convert to MP4. They are already in the correct format so I am told all I need to do is to remux the video and audio streams into an MP4 ...
2
votes
0answers
526 views

IE11 not playing mp4 file

I am using ffmpeg to convert a freely available public RTSP stream to a mp4 file. I can play the file quite well in Chrome using a standard HTML5 video client on a windows 7 machine but not in IE11. ...
0
votes
1answer
722 views

Improve ffmpeg command for MKV to MP4 for iPad?

I have many MKVs made from DVDs and BRs by MakeMKV that I converting to MP4 so I can play/stream on my iPad Air. I now use this command for converting my MKVs to MP4: ffmpeg -i input.mkv -strict ...
0
votes
1answer
294 views

MP4 video plays past it's length?

I have a video file. MP4. It was originally 25GB and 10 hours long. But then I tried to trim it with movie maker. I did what I needed and then I published the video. No, I didn't save over ...
0
votes
1answer
3k views

“windows media player cannot play the file” mp4

We have an .mp4 video hosted on a web site. I can play back the video from the production version of the web site, but not the test version of the site. The production web site has the .mp4 MIME ...
0
votes
1answer
269 views

How to determine 'Output bit depth' of the libx264 library in ffmpeg?

According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything ...
2
votes
1answer
269 views

Cutting multi-bitrate MP4 files for Helix Server with FFmpeg

We are using Helix Server in order to distribute Video On Demand (with multi-bitrate) Content among our audience. This means that there is one MP4 file that contains multiple video streams and one ...