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
16 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?
0
votes
1answer
56 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, ...
2
votes
3answers
10k 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.
0
votes
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
0answers
10 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 ...
31
votes
9answers
60k 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?
0
votes
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 ...
4
votes
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
votes
3answers
833 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 D:\Programme\...
0
votes
1answer
36 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 ...
4
votes
2answers
2k 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 ...
0
votes
3answers
30 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.
0
votes
1answer
2k 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 ...
0
votes
0answers
26 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 ...
25
votes
3answers
55k 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) ...
0
votes
1answer
27 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 ./...
0
votes
1answer
61 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 ...
0
votes
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 ...
0
votes
0answers
16 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 ...
0
votes
0answers
27 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 ...
0
votes
0answers
26 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.
0
votes
1answer
4k views

RAD Game Tools is unable to open an MP4 file

I downloaded RAD Game Tools to convert an MP4 file to BIK, but I get the following error message: This happens with not just the file I want to convert, but with all my video files. I have no idea ...
0
votes
1answer
67 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
0
votes
1answer
64 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 ...
32
votes
2answers
117k 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 ...
0
votes
1answer
53 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?
0
votes
1answer
51 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 ...
0
votes
1answer
94 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 ...
0
votes
1answer
101 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 ...
0
votes
1answer
63 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 ....
35
votes
1answer
23k 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 ...
1
vote
1answer
38 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 ...
15
votes
2answers
8k views

Accurately cut video files from command line

I'm having trouble finding a cli application that can take a video file (avi, mkv, and mp4 preferably) and cut out very short clips (2-6 seconds) with precision time accuracy. I've tried ffmpeg, ...
19
votes
4answers
112k 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
3k views

Why can't I convert FLV to MP4 format using FFmpeg when MP3 works?

In fact I have succeeded to convert FLV to MP3: D:\tmp\ffmpeg-20121005-git-d9dfe9a-win64-static\ffmpeg-20121005-git-d9dfe9a-win 4-static\bin>ffmpeg.exe -i a.flv -acodec mp3 a.mp3 ffmpeg version N-...
2
votes
0answers
38 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
votes
0answers
54 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
votes
1answer
87 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 ...
0
votes
1answer
75 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 ...
39
votes
8answers
161k 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
votes
1answer
105 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 ...
0
votes
0answers
56 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
votes
0answers
72 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
29k 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
votes
1answer
82 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 ...
-1
votes
1answer
44 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
votes
0answers
54 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
votes
1answer
111 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
vote
1answer
155 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 ...
8
votes
1answer
17k 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 ...