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.

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15 views

Why does Google Chrome automatically play MP4 videos (and is that a good thing?)

I am working on a home media server running nginx. I navigated to one of the .mp4 files I have to test it and it started streaming just by clicking on it. Is this... performance-wise... the best ...
3
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0answers
27 views

FFMPEG / x264: Single pass: how do you raise start time bitrates?

When using single-pass mode with a VBV size specified, libx264 will initially "sandbag" the bitrate, presumably due to lack of evidence (or perhaps even a bug). (This is an ironic followup to this ...
0
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1answer
16 views

FFMpeg image sequence to video using VP9 encoder

I'm trying to transcode mp4 to webm format in a lossless way. I tried two ways to do that. For that purpose, I extracted mp4 video to image sequences (png). Then, I converted image sequence(without ...
4
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1answer
3k views

How do I merge a folder of PNG images to a mp4 movie using avconv?

I have a folder containing many time stamped PNG images which I'd like to merge to a short movie. The contents of that directory looks like this: └── images ├── img_20130421_115547.png ├── ...
0
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1answer
31 views

How do I transcode/compress mp4 source files on the Linux command line?

I have some rather large mp4s produced by my phone. They aren't very long, so they're probably not very compressed. What's an example of using a command line Linux tool to transcode one of these to ...
2
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2answers
8k 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.
39
votes
8answers
152k 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 ...
0
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1answer
31 views

convert mp4 video file to any video file, playable in windows media player by VLC media player

I have some mp4 video files that are created by KAZAM. But I need to play those files on Microsoft Windows only by Windows Media Player (I can not install for example VLC media player). Also I can not ...
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0answers
43 views

Cannot find the audio bitrate of FLV video

I use ffprobe to get info about video, which i can use for encoding to mp4. And recently i faced with the issue. The issue is input video has audio, but output video is mute. I used php script to get ...
0
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2answers
3k views

How to merge MP4 files with different frame rates and different audio sample rates

I have four MP4 files called "file_1", "file_2", "file_3" and "file_4" and I wish to merge them into one file in the following order: file_1, file_2, file_3 and file_4. file_1 has the following ...
0
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0answers
22 views

Which audio tracks should a mp4 file have?

I am converting some of my DVDs to mp4 files with handbrake for watching them on my computer and am a newbie to video conversion. I read a bit about the topic on the internet, but am confused about ...
36
votes
9answers
28k 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 ...
0
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1answer
3k views

Sound out of sync after merging multiple mp4 files with Avidemux

I am trying to join (merge) two or more .mp4 files together, without re-encoding. Here is what I did: Started Avidemux 2.5.5. With File->Open, selected Input1.mp4. I received this message - "H.264 ...
0
votes
1answer
39 views

QuickTime can't play mp4 generated by ffmpeg without converting first

I've created a .mkv file from a DVD using MakeMKV that I've then converted to .mp4 using ffmpeg: ffmpeg -i title00.mkv -c copy -c:s copy output.mp4 Now when I try opening the .mp4 file using ...
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1answer
30 views

Upload to youtube and keep all mp4 settings

Is it possible to create an mp4 in such a way that youtube will more or less leave it alone when uploaded? I.E. I want to upload a file to youtube, and then re-download it later using a firefox plugin ...
0
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0answers
22 views

How can I edit Android-grabbed MP4 files in Virtualdub?

Android's command adb shell screenrecord x.mp4 is supposed to produce MPEG-4 files. VirtualDub is supposed to support MPEG-4 files through the use of the FFInputDriver plugin. The latter is true ...
0
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1answer
46 views

Since you can't write FFMpeg to stdout with flv to mp4 is there a workaround?

I've been trying for a while to figure out a way in which I can have FFMpeg input a flv url and output to stdout mp4. Apparently mp4 requires to read the size of the file to fully work. Is there a ...
1
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1answer
51 views

OpenSUSE ffmpeg mp4 output

I keep getting the following error when I try to output an mp4 file with ffmpeg on OpenSUSE 42.1: [NULL @ 0x7f2ef400b580] Requested output format 'mp4' is not a suitable output format Is there ...
5
votes
1answer
13k views

Use ffmpeg copy codec to combine *.ts files into a single mp4

I've got a bunch of ts segments described by a single index.m3u8 file: index.m3u8 segment1_0_av.ts segment2_0_av.ts segment3_0_av.ts segment4_0_av.ts segment5_0_av.ts I know they ...
1
vote
1answer
230 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
33 views

Color variations when playing video files through media players

I am a Software Engineer and using a HP ProBook 4540s laptop. I have installed windows 8.1 (64-bit) for myself and all the drivers are up-to-date. When I play video files (I checked *.mp4 and *.wmv ...
6
votes
4answers
8k views

How to convert 50 episodes from DVD into 50 .mp4 with HandBrake, easily?

I loaded a DVD with 50 episodes in it (chose VIDEO_TS from the program), now when i open it in HandBrake, it shows 50 "titles" in there. i choose 320x240 output format and start converting. Then i ...
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votes
2answers
1k 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 ...
8
votes
2answers
11k views

Shouldn't we always use Web Optimized for Handbrake?

I use Handbrake sometimes to compress video files, and notice that the "Web Optimized" option is not chosen by default, and cannot be set to the default in Options either. But I tried both Web ...
18
votes
4answers
101k views

How do I create a DVD from an MP4 file using Windows DVD Maker?

I'm trying to create a DVD from an MP4 file using Windows DVD Maker (on Windows 7) but when doing so I get the error that the file type is not supported and cannot be imported. What is the easiest way ...
0
votes
1answer
49 views

asterisk 11.7 with app_mp4 for playing mp4 videos

I have successfully compiled and run app_mp4 for asterisk 11.7 and recording audio/video with MP4Save. I am using ulaw as audio codec and h263 (simple h263 not 1998 or 2000) video codec. Although I ...
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votes
3answers
363 views

FFMPEG: convert MP4 to same MP4 (in a different container) and add Subtitles

The main reason for this post is that I have movie.mp4 that I have downloaded an SRT for. When I manually add the SRT VLC uses its settings to change the font/size etc of the SRT. But if I Embed the ...
0
votes
1answer
412 views

How To Convert Offline files downloaded from Lynda.com

As a premium member you can download course video files from Lynda.com. I have downloaded files for the courses that I have completed. The files in reside in the respective folder and have a .Lynda ...
3
votes
3answers
9k views

Is there a way to soft embed subtitles into an mp4 file without re-encoding?

I am trying to add an srt file(s) to mp4 files. Is there a way to do it without re-encoding the file. What I have tried: Added subtitles with the handbrake-cli. While this technically worked, it ...
0
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0answers
22 views

changing MP3 and MP4 default program

When I choose default program for opening MP3 files, it automatically changes for MP4 too. Also vice versa, when I choose default program for MP4 it changes it automatically for MP3 too. This is ...
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0answers
47 views

On Windows; x264 [error]: not compiled with MP4 output support

I am using x264 official built from this page. I run the application as follows: x264 --pass 1 --bitrate 1000 -o output.mp4 input.vob --profile high But it gives me following error: x264 ...
0
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0answers
46 views

Capturing RTMP stream and save as MP4

I am trying to capture the following RTMP stream, how would I go about it? jwplayer("flvplayer").setup({ file: "90/4433568122_n.mp4?h=grfo7we4k7xzjz2z55gearri7zotzl6rs2hasvfb4vntwftczres3lizpq", ...
0
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0answers
56 views

H.265 and Opus in Mp4 container - is it possible?

I have an MKV file with HEVC video and OPUS audio. It plays great in all players. The problem is that I need it to be streamable. When VLC plays an MKV from the web, it first downloads it and then ...
0
votes
0answers
62 views

ffmpeg-concatenating two or more mp4 videos does not give bad output video

I am joining two or more videos using ffmpeg : ffmpeg -f concat -i mylist.txt -c copy vidname.mp4 mylist.txt file contains enteries: file '1.mp4' file '2.mp4' both videos are of same frame rate ...
0
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0answers
64 views

How to manually add and edit metadata in a mp4 file

I need to edit/add metadata in a mp4 file, I know their are applications to do this for me, but they are all quite slow. I have looked up how the metadata is stored but there are no clear answers on ...
2
votes
1answer
1k 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 ...
0
votes
0answers
81 views

Split MP4 video with chapters into seperate files

I´ve got a few videos which I already converted (with HandBrake) into m4v (ready for iOS devices - sources are deleted) each 2,5 hours long with chapter marks and I want to cut them into seperate ...
0
votes
0answers
64 views

Video is choppy but audio is fine (Windows 10)

I recently recorded my computer playing a full screen video for around 3.5 hours. I then restarted my computer and went to play it back. The audio is fine and runs smoothly, there is no issue. The ...
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1answer
245 views

In ffmpeg, how to delay only the audio of a .mp4 video without converting the audio?

In my .mp4 file the audio delay is -3840 ms. I synced it in KMplayer, and I don't want to use MKVGUI to make a .mkv file. I just need to delay the audio by -3840 ms, everything else intact. What would ...
7
votes
5answers
5k views

Extract audio aac from mp4

Is there a command line tool for Windows to extract audio aac from mp4 ?
8
votes
2answers
3k views

Why is H.264 video so much faster in an FLV container than in an MP4 container?

I am developing a tube site, and currently having issues with H.264 format. I noticed that YouTube put their hi-def videos into an MP4 container, so logically I did the same. Next, I installed ...
1
vote
1answer
210 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
360 views

Trimming videos - quicktime vs. mplayer/ffmpeg stack

I have several mp4 video files (H.264, AAC) from which I want to trim a few seconds at the beginning and the end. I used Quicktime Player 7 and MPEG Streamclip for this. The generated files are a bit ...
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vote
1answer
377 views

How do I create a streamable and seekable MP4?

I want to create an MP4 that supports seeking and streaming. DASH appears to be what I want except that the segment seek points are stored in an external file (the MPD) which doesn't work for my ...
2
votes
1answer
693 views

auto tag video and add to itunes on windows

I'm looking for an app similar to Auto TV Tagger that monitors a folder and auto magically tags the file either through a webservice or by the file name given then adds it to itunes in the proper ...
1
vote
1answer
284 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 ...
0
votes
1answer
123 views

How can I edit video (specifically mp4) metadata?

I have a few video files that are 1080p video files, but for some reason, they don't have any metadata for bitrates (audio, video, or total) or anything like that. I first noticed this when I looked ...
4
votes
1answer
914 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
2answers
310 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 ...
2
votes
1answer
2k views

Why isn't this video player on my Firefox?

The video on this webpage works on my tablet's and a 2nd computer's Firefox browsers, but not on my main computer's Firefox. Tablet: Android 5.0, Firefox 39 2nd PC: Windows 7 x86, Firefox 40.0.3 ...