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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Windows Media Player 12 wont play mp4, mp3, wmv files through IIS local hosted website when PC is disconnected from the Internet

I have an IIS 6.1 website on a local Windows 7 32-bit machine that serves HTML and MP4 videos through Internet Explorer all on the local machine. An internet connection is not required as this is all ...
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14 views

mp4 file not working from embedded flash website

I downloaded a video file with flash video download add-on for firefox from a website. This downloaded ok but when I try any players (VLC, quicktime and WMP) it does not play at all. I also tried ...
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1answer
30 views

Reduce size of mp4 video

I have an mp4 file but it is huge and I want to reduce the size. I can't use MovieMaker because it treats it as an audio (Vista). If I rename to mpg it complains about codec missing. How can I reduce ...
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1answer
30 views

What video resolution is best? [closed]

I shot video's on my Samsung Galaxy S7 Edge (in vertical mode, not landscape) and paid no mind to what the video resolution was. I then converted the mp4 videos to avi and burnt them to dvd disc but ...
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1answer
28 views

Does using preset=placebo or veryslow option also decrease decode time?

When using h.264 I use preset=placebo option. It increases encoding efficiency, but I don't know I feel like it is also increasing decoding time. Is it right or it doesn't affect decoding time at all?
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1answer
114 views

Unable to play mp4 files embedded in a webpage

There's this MP4 file that I can play in Firefox 47 on Windows Vista SP2 if I access it directly: http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4 The website I'm trying to access, however, ...
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12 views

vprofile option in h264 is not working for me

I'm using shotcut to convert my videos. in additional options I enter movflags=+faststart preset=placebo vprofile=baseline level=3.0 But I get the following log: [libx264 @ 000000000ac2f020] [Eval ...
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1answer
55 views

Bulk transcoding ISO/IMG to MP4/MKV

I need a tool/script to help me convert my collection of DVD's to MP4. I've started using Plex instead of playing each image-file directly and it's quite a pain in the butt to manually convert a ...
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3answers
34 views

How to completely remove audio channels from video

Telegram displays soundless MP4s as GIFs. How can I completely remove audio from my MP4 files? I tried Filmora but it only detaches audio. While exporting it still includes silenced audio channels.
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28 views

FLV seeks slowly after cutting with FFMPEG

The input video is a h264 flv and is able to seek instantly to any keyframe. When I cut a snippet with the following command, keeping the flv container, the resulting video takes a few seconds to ...
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1answer
31 views

ffmpeg mp3 to mp4 with image compatible with iphone

I need to convert an mp3 to mp4 with image (1080x720) using ffmpeg from my OSX command line. I already installed last version of ffmpeg (3.0.2), and tried the following command as described here ./...
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1answer
94 views

Encode h264 with FFMPEG that works across all browsers and devices (windows/mac/iOs/Android)

I want to encode images with FFMPEG to a h264 video file that will work on Windows Browsers and Mac Browsers and iOS / Android devices to display in HTML5. Is there a way to do that using one encoded ...
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0answers
7 views

Repair Gopro files

I read a couple of place that i am not the only person who this trouble occurs. 1 time on 5 my video are corrupted on my gopro. It's always appen if my gopro miss battery, so my video file as seen not ...
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0answers
21 views

how to merge 1 mp4 video with a looping mp3 audio?

I have a .mp4 mpeg-4 video which has no audio track and is about 11 minutes long and a mp3 file which is about 30 seconds long. I would like to combine the two, with the audio looping. Also I would ...
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0answers
35 views

An issue of merging multiple MP4 video

I am Windows user. I have about 300 .mp4 video from my XIaomi YI action camera. A duration of each file is about 2-50 seconds. I need to merge them into 1-3 file(s). I have tried about 12 video ...
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0answers
31 views

How to embed subtitles 9n .smi file in mp4 file

Is it possible to embed subtitles in .smi file into mp4 so the mp4 file can run alone with embedded subtites? I have a media player that plays mp4 files but can not make it to utilize .smi file.
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1answer
96 views

ffmpeg convert image to mpeg/mp4 gets mp4 file with 0 bytes

I'm trying to convert a png file to mp4 file but I get 0bytes mp4 files. Here is my code structure: ffmpeg -r [framerate] -i [images] -s [resolution] -vcodec libx264 [videofilename].mp4
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1answer
78 views

Trimming and joining media files using ffmpeg

I am trying to remove a segment (00:26:00 - 00:32:30) from a video file input.mp4. Since there is no way to do that directly using ffmpeg (as far as I know), I am instead cutting the segments which I ...
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1answer
68 views

ffmpeg convert image to mpeg/mp4

To convert jpg to avi this code works perfect on my server shell_exec("ffmpeg -f image2 -r 1/10 -i image.png out.avi"); I need to convert jpg/png images to mp4/mpeg. How do I do this?
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1answer
77 views

ffmpeg: re-encode a video, keeping settings similar

I'm dealing with some mp4 videos that were encoded on mobile phones and are pretty huge. I think ffmpeg can do better. I'm trying to figure out what flags to use to preserve fps, resolution, and ...
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1answer
112 views

Concatenate a list of files with different resolutions

I have a list of mp4 files which are of kb's or of at max 4 MB (they were actually gifs but downloaded as mp4).So when I concatenate them using a list of them the video don't work as all of them are ...
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1answer
132 views

overlaying in ffmpeg failed due to audio codec how to fix it?

I am using ffmpeg to overlaying searies of images on video but on some occasions on some mp4 videos it fails some time it works perfactly my command gives error like Could not write header for output ...
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1answer
86 views

Batch extracting multiple .aac tracks from an .mp4 using ffmpeg?

How do I create a ffmpeg .bat file that will let me drop in .mp4 file(s) and extract multiple .aac tracks without any converting or transcoding taking place ? I do know that there will always be 3 ....
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1answer
41 views

How to stop MP4 file from stuttering in Linux

Playing an HD MP4 file in Ubuntu stutters using Movie Player or LibreOffice Impress. Interestingly, when using VLC, it plays perfectly smoothly. I have noticed that in system monitor, when playing ...
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0answers
41 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
56 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 ...
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1answer
95 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 ...
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1answer
81 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 ...
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1answer
134 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
90 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 ...
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1answer
92 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
51 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 ...
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0answers
60 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 ...
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1answer
129 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 ...
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1answer
176 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 ...
0
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1answer
56 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 ...
2
votes
1answer
3k 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 ...
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1answer
105 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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0answers
30 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
121 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 [error]...
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0answers
120 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", ...
1
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0answers
187 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
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0answers
118 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 ...
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0answers
112 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 ...
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0answers
141 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 ...
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0answers
61 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 ...
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0answers
84 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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votes
3answers
860 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 ...
3
votes
1answer
3k 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 ...
2
votes
1answer
6k 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 ...