Tagged Questions
1
vote
0answers
16 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 ...
1
vote
0answers
39 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 ...
0
votes
1answer
88 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
1answer
139 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
51 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 ...
2
votes
0answers
259 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
116 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
262 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
166 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 ...
3
votes
0answers
99 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 ...
0
votes
0answers
116 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 ...
2
votes
1answer
1k views
FFmpeg MKV to MP4 remux whilst converting all audio tracks to AAC
I had a ffmpeg command that would successfully remux an mkv to a iTunes compatible mp4. However it only took the first audio stream regardless of language. I want to remux all audio streams, or at ...
2
votes
1answer
910 views
Convert mp4 video to a format xbox 360 can play
Here is a video file my Xbox 360 refuses to play:
$ MP4Box -info video.mp4
* Movie Info *
Timescale 90000 - Duration 02:18:33.365
Fragmented File no - 2 track(s)
File Brand ...
2
votes
3answers
224 views
How to apply audio track to a mute h264/mp4-video losslessly?
I have a MP4/h.264-video with no sound. With ffmpeg or similar, how can I apply an audio track to that MP4-file without degrading the quality of the video (i.e. without recoding the video-track)?
I'd ...
3
votes
1answer
400 views
When spliting MP4s with ffmpeg how do I include metadata?
I have a few MP4s that i want to upload to my flickr account but they have a maximum size of 500mb as mine is only about 550 i was planing to simply split them in half then upload them, but i want to ...
3
votes
1answer
727 views
accurate cutting of video (+ audio) with ffmpeg
I want my website to allow users to accurately create their own clips from a source video I provide.
I have a source video file that I first want to convert to something suitable for a website:
...
1
vote
2answers
1k views
What is the best way to downscale mp4 video while keeping it as sharp as possible?
I've got an .mp4 file that's currently 830x1100 (it's a screencast) that I need to resize down to 114x150. I've been experimenting for hours with ffmpeg settings and nothing comes out looking nice and ...
1
vote
0answers
532 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) ...
0
votes
1answer
1k 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 ...
3
votes
0answers
129 views
How to convert .avi video that has 1 static image in the video (with sound) to mp4 video with ffmpeg to least possible size?
I've an .avi video (divx) that's at 25fps and it has mp3 audio at 64kbit/s. This video has just one image throughout the entire video.
I'm trying to convert this video to mp4 but to make it as small ...
3
votes
2answers
2k views
Why is converting WMV to MP4 so slow?
I am trying to convert a video from WMV to MP4 with FFmpeg but it takes couple of hours. If I try to convert it to AVI it only takes about 10-15 minutes.
ffmpeg version
ffmpeg version ...
3
votes
2answers
3k views
FFmpeg drops frames when encoding a png image sequence into an x264 mp4 video
I'm trying to encode an image-sequence (frame0001.png, frame0002.png, ... , frame0160.png) into an x264 video using the following command:
ffmpeg -i frame%04d.png -sameq -r 24 out.mp4
After ...
0
votes
0answers
17 views
Convert ISO to MP4 with ffmpeg cli on linux [duplicate]
Possible Duplicate:
how do I convert .iso to .mp4 without mounting with ffmpeg
I have numerous iso and I would like to convert them to mp4 using ffmpeg (only the main video and not menus ...
0
votes
1answer
275 views
How to encode a fully working h264 video for flash player?
How to encode a fully working h264 video for flash player?
I did some homework:
It seems that I should use command like "ffmpeg -i input.mp4 -vcodec libx264 -g 1 -r 25 output.mp4" but no luck: the ...
1
vote
2answers
4k views
Conversion from WMV to MP4 file fails with FFmpeg
When converting a WMV file to an MP4 file, it says
[mp4 @ 0x989c160] track 1: could not find tag, codec not currently
supported in container
and
Could not write header for output ...
0
votes
1answer
458 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
2answers
702 views
ffmpeg: Pipe input error
I'm facing an issue while working with ffmpeg when input and output are pipes. Though Output pipe is working fine, piping the input is causing some error.
I tried to convert mp4 video to flv using ...
1
vote
1answer
271 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
1k 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
2k views
Error using ffmpeg to convert mkv to avi on Windows 7
I am using ffmpeg on a Windows 7 machine. I am trying to convert mkv files to either mp4 or avi. Here is the command I used:
ffmpeg -i "C:\Path\To\Input.mkv" "C:\Path\To\Output.avi"
Here is the ...
1
vote
0answers
832 views
Decent profile for transcoding to webm and mp4 files with ffmpeg [duplicate]
Possible Duplicate:
What bunch of ffmpeg scripts do I need to run “Video for everybody”?
I am in the process of converting large, high quality, mxf container files (using mpeg-1 ...
2
votes
1answer
533 views
FFmpeg/X264: Split video mid-GOP without reencoding entire stream
I've got an H264 video (Stored in an MP4 file). Each GOP is approx 10s long. I want to trim the first couple of seconds off the video, which means I need to split the first GOP. Is there a way to do ...
1
vote
2answers
3k views
how do I convert .iso to .mp4 without mounting with ffmpeg
The problem is - I want to convert .iso with dvd to .mp4 (h264/ac3), but I cannot mount it via mount -o loop, because I'm on a virtual machine that doesn't allow to do that.
Googling doesn't help.
...
12
votes
2answers
12k views
Converting FLV to MP4 Using FFMPEG and Preserving the Quality
Im trying to use ffmpeg to convert my flv files to mp4 to play them on iOS devices but the converted video has a much worse quality than the original one.
Here is the command i use:
ffmpeg -i ...
0
votes
1answer
81 views
making ffmpeg recognise mp4
What should I install on ubuntu 10.04 to allow my ffmpeg convert files to MP4 ?
2
votes
1answer
1k views
Making MTS video file smaller using FFMPEG
I have a Sony AVCHD camera that records to MTS video files. I want to be able to change the resolution of the video file from 1440x1080 to 640x480 and make the video file smaller, but retain as much ...
16
votes
1answer
8k 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 ...
4
votes
3answers
5k views
Synchronizing audio and video using MP4Box / ffmpeg to concatenate files
I have two H.264 encoded MPEG-4 files that I need to concatenate. I have been using MP4Box for this task by first ensuring the files are encoded identically (even went so far as to compare output from ...
