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

5
votes
1answer
1k 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 ...
5
votes
1answer
12k views

ffmpeg: Could not find codec parameters for stream 0 (Video: h264) unspecified size

I try to convert a video from .raw to .mp4. For this reason I did download, build and install both x264 and ffmpeg. However, command: ffmpeg -f h264 -i output.raw -vcodec copy output.mp4 fails with ...
4
votes
1answer
1k 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 ...
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 ├── ...
3
votes
1answer
2k views

How to add “chapters” or “bookmarks” to movies?

Is there an easy way to add chapters to existing movie files? Note: Actually, I’m not 100% sure if they’re called “chapters” in video files, but it’s the same concept as DVDs. I assume this differs ...
2
votes
1answer
66 views

Does ffmpeg support setting the description tag on a per-stream basis?

I'm attempting to set a description tag for each of two audio streams within an mp4 file. I'm using a command line similar to this (I've simplified): ffmpeg -i old_movie.mp4 -map 0:0 -c:v copy -map ...
2
votes
1answer
1k views

Why do I get a 403 error in Firefox but not in IE?

Going to http://teamtreehouse.com/ in IE 9.0.8112 the video on the right comes up and shows the still image. You click the image, and it plays fine. I have Firefox 18.0.1 as my primary browser. When ...
2
votes
1answer
696 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
285 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.) ...
1
vote
1answer
52 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 ...
1
vote
1answer
229 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 ...
4
votes
0answers
287 views

Combine/concatenate multiple MP4 files, making each file into a chapter

I am looking to use handbrake to combine 43 short mp4 files into one larger file. However, I want to ensure that the start of each file is recognized as a chapter. I'd be using vlc to play the file.
4
votes
0answers
296 views

Why is the resulting file unplayable when I use FFMPEG to convert a MP4 video to ASF?

I want to convert an .mp4 file to an .asf file, but I need to keep the size of the file below 150 mb (the server I need to upload the file to can only take files under 150 mb). Basically I want to ...
3
votes
0answers
42 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 ...
3
votes
0answers
243 views

FFmpeg & iPhone: don't display audio language button

I'm creating an MP4 file with FFmpeg 1.1.1, using life and aevalsrc to generate some test video and audio: ffmpeg -f lavfi -i life -f lavfi -i aevalsrc=0 -frames:v 750 life.mp4 If I play it on an ...
2
votes
0answers
32 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 ...
2
votes
0answers
52 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 ...
2
votes
0answers
750 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. ...
2
votes
0answers
1k views

Failed to convert a wmv file to mp4 with ffmpeg

i need a help with this command FFMPEG COMMAND: ffmpeg -y -i /input.wmv -vcodec libx264 -acodec libfaac -ac 2 -bufsize 20M -sameq -f mp4 /output.mp4 Output: ffmpeg version 1.0 Copyright (c) ...
1
vote
0answers
138 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 ...
1
vote
0answers
319 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 ...
1
vote
0answers
428 views

Seekbar not working in Chrome

I have uploaded a video to my Windows Storage and noticed, that the seekbar (of the default Chrome's html5 player) is not working. Url of that video is: ...
1
vote
0answers
299 views

FFMPEG converted file for jwplayer shows black

im new to ffmpeg, and I'm trying to convert it to mp4 to play on jwplayer, the video converts, the sound is good, but all i can see is black color, maybie anyone knows the answer to this problem? ...
1
vote
0answers
313 views

Invalid sample format error while converting a DVD iso file to Mp4

I get the following error when I convert a ISO file to MP4. The ISO file contains a VIDEO_TS directory with the video files: ffmpeg -i DieRelativeringVanMenswees.iso DieRelativeringVanMenswees.mp4 ...
1
vote
0answers
771 views

FFmpeg AVI to MP4 preserves sound, but not images

Working with FFmpeg at a conversion (any file to MP4 (H.264/AAC)): ffmpeg -y -i testdatei.avi -i logo.jpg -filter_complex overlay=15:15,scale=-1:720 -c:v libx264 -profile:v baseline -preset medium ...
1
vote
0answers
597 views

ffmpeg and matching encoding options

I have two mp4 files captured from different android devices. the ffmpeg output of each file is listed below. Can i re-encode two.mp4 so that the encoding options are the same as one.mp4? I cant see ...
1
vote
0answers
581 views

Getting Windows Media Center to recognize chapter marks in .mp4 files

I started to convert my DVD collection to .mp4 and despite the fact that Handbrake is adding chapter marks in the .mp4 files, WMC doesn't recognize them and skips forward in the same manner as ...
0
votes
0answers
5 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
0answers
47 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 ...
0
votes
0answers
48 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
0answers
26 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 ...
0
votes
0answers
92 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
votes
0answers
88 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
votes
0answers
92 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
votes
0answers
82 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 ...
0
votes
0answers
105 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
54 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
76 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 ...
0
votes
0answers
587 views

using ffmpeg to repair corrupted MP4 video files from Xiaomi Yi

did not know wether to create a new thread or to post in an existing one. Decided for the first option, as my case seems to be a little different as I do not have one video corrupted but plenty of ...
0
votes
0answers
53 views

Which audio codec is preferable to use for mp4 video?

I use standart codec for encoding and i don't like the quality of audio even if there is larger audio bitrate. ffmpeg -y -i input.avi -i watermark.png -filter_complex ...
0
votes
0answers
99 views

Sony Vegas: Will re-rendering a video with identical video encoding reduce quality?

I have edited and exported a video in Sony Vegas Pro 13 using the preset 1920x1080-30p video template (mp4, AVC, 16 Mbps). However, I need to reedit the audio of the video, and would like to know if ...
0
votes
0answers
75 views

Not able to play a large media file in Quicktime

I am testing a video domain bug, the case is I have a large .mp4 recording 7.5GB, I am able to play it in VLC player and also in Windows Media player but when I play it with Quicktime player it throws ...
0
votes
0answers
77 views

How to attach an intro mp4 to multiple mp4 files in a folder?

I have an intro video (mp4) that I'd like to attach to multiple mp4 videos in a folder. I use windows and ffmpeg. How would I code this in the cmd? If I have to use another program that's fine, I ...
0
votes
0answers
382 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, ...
0
votes
0answers
245 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
0answers
554 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
224 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 ...
0
votes
0answers
68 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
631 views

How to get a reasonable file size when converting from MP4 to WMV?

I converted an MP4 1080 movie to WMV. The result is a huge 9 GB file. How can I convert it (using FFmpeg) so that the file is decent quality but not huge? Or, how can I split a 9 GB WMV file to two ...
0
votes
0answers
182 views

Nero MP4/AAC CRC/EDC?

My MP4 library seems to become corrupt(actual file system issue) from time to time. I believe it was foobar and not the hardrive(was initial though but all tests are ok) as I saw some issue foobar in ...