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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4
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0answers
189 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.
2
votes
2answers
5k 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 ...
4
votes
1answer
7k 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 ...
1
vote
0answers
177 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: ...
5
votes
1answer
6k 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 ...
0
votes
1answer
7k 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 ...
-2
votes
2answers
120 views

Convert Blu-ray movie to DVD quality [closed]

I have a 30GB .mp4 file (personal full HD movie) which I want to convert to a DVD quality (4.7GB) movie. What is the best way/tool to do that?
1
vote
1answer
776 views

how to save m3u8 stream

I want to save a m3u-stream. The content of the m3u8 files looks like this: #EXTM3U #EXT-X-ALLOW-CACHE:NO #EXT-X-VERSION:3 #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=756617,CODECS="avc1.77.31, ...
0
votes
1answer
394 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 ...
12
votes
4answers
4k views

How can I remove multiple segments from a video using FFmpeg?

I am trying to delete a few sections of a video using FFmpeg. For example, imagine if you recorded a show on television and wanted to cut out the commercials. This is simple with a GUI video-editor; ...
0
votes
2answers
858 views

Remove beginning and end from multiple MP4 files in bulk

I have several 100 videos that I need to remove the first 20 seconds and the last 30 seconds of. Obviously not practical to do this one at a time. Can I automate this somehow, maybe in an OS X ...
2
votes
1answer
2k views

ffmpeg - concatenating two MP4 files results in bad output file

I generated two MP4 files - a five-second intro file, which is created by the script below, and the main video (about one minute long) is created by screen-cast-omatic, both in MP4 format. When I ...
1
vote
0answers
194 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
2answers
7k views

any way to recover corrupted mp4?

I have an mp4 file that seems to have gotten corrupted somehow: $ file HDV_1042.MP4 HDV_1042.MP4: data $ mediainfo HDV_1042.MP4 General Complete name : HDV_1042.MP4 File ...
0
votes
1answer
285 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 ...
6
votes
1answer
6k views

How do I add MP3, MP4 and H.264 support to Chromium on Windows?

Google Chrome on Windows comes with support for the above media formats, however, Chromium does not. I want to add support for my own personal use, how can I do this? I know that on Ubuntu this is ...
1
vote
0answers
162 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 ...
0
votes
1answer
666 views

What is the fastest and best way to convert an rmvb video to mp4/mkv without losing any quality?

The file will be played in a Popbox3D. My old method was to convert the video using vidcoder (an offshoot of handbrake) using normal settings, but I've recently confirmed that this significantly ...
2
votes
1answer
943 views

MP4 takes too long to start

I'm converting my video to H.264 / MP4 with ffmpeg. I then move the moov atom to the start of the file with qt-faststart, so I can stream the video. Everything works fine with small videos of 5–10 ...
0
votes
1answer
3k views

Converted MP4 not playing in Chrome

I recently converted a file from .avi to .mp4 using the Free MP4 Video Converter (v. 5.0.28 build 827) from DVDVideoSoft. I tried opening the new MP4 file in Chrome. I can hear the audio from the file ...
1
vote
0answers
239 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 ...
18
votes
2answers
16k views

How to extract an audio track from an MP4 video file on Windows?

Having an MP4 video file I'd like to get just the audio track of it. What makes my question different from the others is that I don't want to convert it (like to MP3 or anything) - I'd prefer to keep ...
0
votes
1answer
504 views

FFmpeg fails to stream to FMS 4.5

I'm attempting to use ffmpeg to transcode an input video from whatever format it's in to an mp4 with h.264 video and MP3 audio and have the output go directly to FMS 4.5 using rtmp so the video will ...
1
vote
2answers
385 views

Appending MP4s loses sound from second file

When I try to join two MP4s together using ffmpeg, the first file plays fine and has sound, but the second one loses all sound and becomes a lot choppier. I encoded both the files from MKVs using ...
0
votes
1answer
551 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 ...
3
votes
0answers
230 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 ...
0
votes
2answers
266 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 ...
3
votes
2answers
3k views

Compiling x264 with mp4 support

I need x264 for my project. I have one at /opt/local/bin/x264, but when I execute the following command: x264 --qpfile cuepoints.qp --output output.mp4 input.mp4 it says: x264 [error]: not ...
13
votes
2answers
6k views

FFMPEG - Non-monotonous DTS

When I use FFMPEG to convert a video from MP4 to M3U8, using the following command, ffmpeg -i op.mp4 -b:v 128k -flags -global_header -map 0:0 -map 0:1 -f segment -segment_time 4 -segment_list_size 0 ...
6
votes
1answer
3k views

How do I replace the audio in an MP4 file without re-encoding?

I've got a video in an MP4 container that I would like to replace the audio track in (not add another audio stream to, nor convert the audio format of). Someone elsewhere online suggested to use ...
2
votes
2answers
4k views

Problems with frame rate on video conversion using ffmpeg with libx264

I have problems with transcoding some videos. I ran the most simple ffmpeg command and it takes very long time and the output file is about 10 times bigger. If I provide the frame rate parameter -r it ...
1
vote
1answer
329 views

Can't get instances of a video (mp4) to play in multiple tabs in Chrome

I have a mp4 that I would like to play in Chrome. The mp4 is stored on s3 and has a url like http://bucket.s3.amazonaws.com/vid.mp4 Now when I put that url into Chrome 27.0.1453.94 the video plays. ...
1
vote
0answers
254 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 ...
0
votes
1answer
214 views

Save “fingerprint” info inside MP4 videos

I have a Debian server serving MP4 videos (for download, as files) and I was wondering if there is a way to save some unique "exif" information for each user that downloads a file. I would like to do ...
0
votes
3answers
2k views

VLC on CentOS 6 always shows black screen

I downloaded VLC on my CentOS 6. When I play a video by double clickig on finder, or using the vlc command in terminal, it shows a black screen. Sound works fine though. Do you have any idea what ...
2
votes
1answer
3k views

Rotate MP4, and change dimensions

I have an MP4 video that was filmed on my Android phone, but the guy filmed it holding my phone some weird way. When viewing it in QuickTime I have to rotate my laptop 90 degrees and then I will see ...
1
vote
1answer
308 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 ...
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 ├── ...
1
vote
1answer
924 views

How can I extract tags from a MP4 file with MP4Box or mediainfo on the command line

I want to extract tag information like title, author, encoded date, tagged date and so on from several video, audio and subtitle tracks in .mp4 files (for later use in mkvmerge). I need the extracted ...
0
votes
1answer
121 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 ...
3
votes
1answer
1k views

How to merge FLAC files into single, eventually chaptered, file?

Windows Phone doesn't support gapless audio playback, so albums whose tracks are meant to segue into one another are ruined (there's a pause or a click when switching tracks). I would like to try ...
8
votes
2answers
12k views

How can I get high quality/low size MP4s like the LOL release group?

Release group LOL does an excellent job at encoding their releases on The Vampire Diaries (on other shows like How I Met Your Mother the bitrate is higher, so doesn't seem this effective). About 200 ...
1
vote
1answer
1k views

How to merge an image into an audio file?

I am trying to merge a thumbnail-size (104x80) image into an audio file (M4A). I want it to be played in JW Player, but it doesn't seem to support thumbnails. I have tried it in VLC Player, but the ...
1
vote
0answers
267 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 ...
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 ...
12
votes
1answer
8k views

Streaming mp4 with ffmpeg

I need to create a feed that has two streams - webm and mp4 - so that it can be compatible on all HTML5 video players. The webm stream works perfectly. However, when trying to access the mp4 stream, ...
0
votes
1answer
2k 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
2answers
3k views

Tools to check if MP4/AVI is playing correctly?

I have downloaded lots of video stuffs (I mean ALOT), but when I tried to review some of them, some parts are not playable (sometimes portions of the file, and sometimes the whole file itself). Is ...
1
vote
1answer
378 views

ffmpeg Live Input MP4 Error

Currently I have a mic and a webcam connected to my computer. I am running ffmpeg on CentOS 6.3. When I try to record a video without audio by: ffmpeg -y -f video4linux2 -t 15 -s 640x480 -r 25 -i ...
1
vote
0answers
633 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 ...