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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692 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 ...
3
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
810 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 ...
1
vote
1answer
40 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
285 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 ...
1
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1answer
305 views

extracting mp3 audio from mp4: audio longer than video?

I have an mp4 video that has no audio/video sync issue. I tried to extract audio to an mp3 file, following the suggestion in this thread: Extracting audio from MP4 video into MP3 ffmpeg -i ...
1
vote
1answer
478 views

Lower mp4 file size

I have couple of (over 100) mp4 video files, which are approximately 15 MB each. I think they are unnecessarily high quality videos, I want to lower the sizes of each, by reducing the quality. I know ...
1
vote
1answer
2k views

How can I rotate MOV and mp4 files in Windows Live Photo Gallery?

I am using Windows Live Photo Gallery on Windows 7 to manage my photos and video clips from camera/phone. If I import photos/videos from camera, it is smart enough to rotate as necessary, but I have ...
1
vote
1answer
3k views

FFMPEG converting from m4v to mp4 does not stop processing

I'm using ffmpeg to convert various types of video files into mp4s. The command I use works for most video files I've encountered, however when it encounters an m4v it never stops processing the ...
0
votes
1answer
40 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
75 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
1answer
176 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
1answer
370 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 ...
0
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1answer
698 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
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1answer
276 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
372 views

How to check is h264 mp4 file is correct?

I writing applcation which split live stream from web camera to multiple h264 mp4 files. Now I have some problems like missing keyframes and maybe another. Are there any tools to check my output ...
0
votes
1answer
274 views

Read/Write albumart cover type in mp4/m4a with AtomicParsley or any other CLI tool?

Is it possible (and how) to read and/or write the cover type of the artwork embedded in mp4/m4a audio with AP? MP4 audio supports 'Front Cover' and 'Back Cover' types, and I can read/set those values ...
0
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1answer
536 views

MP4Box and concatenating files with different aspect ratio

I have a large directory of small video clips taken with a cell phone. I've been able to use mp4box to concatenate them into a single file nicely EXCEPT if they are different aspect ratio. In this ...
0
votes
1answer
251 views

Concatinating mp4 files to a single mp4 file

I have some mp4 video files with me and i need to concatenate them one by one and make a single MP4 video file. I came to know about FFMPEG through which we can concat files. I tried doing ffmpeg ...
0
votes
1answer
120 views

Quality issues with mov to mp4 video conversion through handbrake

I am converting mov video files to mp4 through handbrake tool but the video quality is getting disturbed in the windows media player. It is working fine with the vlc player. How do I resolve this ...
0
votes
1answer
51 views

Audio file tagging/renaming

I would like to properly tag my music collection in the following way: Filename: Artist - Song Title - Key(Original Key) - BPM - Genre Tags: The tags match above(each token above is a id tag). Is ...
0
votes
1answer
901 views

MP4 re-ecoding to guarantee concatenation without re-encoding

I have 2 mp4 videos that fail to concatenate when using: MP4Box -add 1.mp4 -cat 2.mp4 out.mp4 Is there a way to re-encode 2.mp4 so that the concat call will create a valid output? Possibly with ...
0
votes
1answer
2k 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 ...
4
votes
0answers
179 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.
3
votes
0answers
592 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 ...
3
votes
0answers
219 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
201 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
508 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) ...
2
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0answers
686 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 ...
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0answers
163 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
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0answers
193 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? ...
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0answers
157 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 ...
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0answers
234 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 ...
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0answers
249 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 ...
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0answers
258 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 ...
1
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0answers
626 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 ...
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0answers
472 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 ...
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0answers
497 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
57 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
13 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 ...
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0answers
50 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
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0answers
78 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
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0answers
103 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
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0answers
137 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
56 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
24 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 ...
0
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0answers
455 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
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0answers
153 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 ...