Questions tagged [mpeg4]
The mpeg4 tag has no usage guidance.
33
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FFMpeg Mp4 cover art shows on Windows but not in Android
I'm decrypting an audible audiobook using this command:
ffmpeg -audible_key KEY -audible_iv IV -i book.aax -c copy out.m4b
The output file seems fine on my Windows machine. Metadata and cover are are ...
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2
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2k
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Convert MPEG4 to AMV via ffmpeg
I am trying to convert a MPEG4 video to AMV via ffmpeg. I've searched through web about the appropriate formatand and also tried to check another AMV video parametrs. So I've found that there should ...
0
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1
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ffmpeg: What does the format 'null' imply?
I am trying to understand exactly what does the 'null' format imply. I did read the documentation from:
https://ffmpeg.org/ffmpeg-formats.html#null
But I fail to understand the following scenario. ...
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2
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How to let ffmpeg use back same bitrate when encode video?
I have an mp4 file encoded using mpeg4 with a size of 20MB
When I checked the details of it, it said it has a 308k variable bitrate
Then, when I encoded it into h264, ffmpeg converted it with a ...
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-1
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Generate mpeg 4 file with specific format with h.264 codec
I need a specific format in my .mp4 video file:
1. Only I and P frames
2. Each P frame based on only the previous (temporally) I frame
3. An I frame every second or so
Is it possible to generate ...
- 101
0
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1
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399
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ffmpeg transcode twice compress further?
I have a collection of avi videos (say A).
I first convert them into MPEG4 Part2 (say B) using ffmpeg -i ${inname} -vf scale=340:256,setsar=1:1 -q:v 1 -c:v mpeg4 -g 12 -f rawvideo ${outname}. The ...
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3
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2
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591
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Cut part of audio track in MP4 file
I have an .MP4 file with one video track (H.264, 25 FPS) and one audio track (MP2). The total length is ~2:52 (two hours, 52 minutes). I've noticed that A/V is synchronous before ~2:34 but async ...
user674865
2
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1
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476
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HE AACv2 Audio profile on MediaInfo
I have a SDI input encoder with audio configuration as
Coding : AAC/HE-AAC
Coding Mode : MPEG-4 HE AAC v2
Mode : Stereo (2/0)
Sameple Rate : 48KHz
ES Bitrate : 64Kbps
Transport Format : ADTS
And, ...
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4
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1
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How to accurately split and combine videos with ffmpeg respecting inpoint/outpoint
I'm learning how to split and combine videos with ffmpeg. Presently I'm practicing on a 799 KB MP4, one_through_ten-timestamped.mp4, where each frame has a burnt-in "frame number" (up to frame 40, the ...
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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?
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What is the best way to losslessly compress MJPEG to MP4?
I have a few digital camera movies recorded in MJPEG that are taking a few GB of storage space. I would like to better compress them, but losing as little detail as possible, or none.
Since MJPEG ...
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4
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1
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4k
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Smart Trim an h.264 .MP4 Video file in ffmpeg
I would like to take live-captured h.264 video as an input and trim it to start in a fade up from black and end with a fade to black with as little encoding as possible. These fade in/out points may ...
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Extract Y-channel of every I-frame from MPEG4 movie as loslessly as possible
I'm working on a video tracking experiment and got stuck with videos that are quite badly compressed with the MPEG4 DivX 5x/6x codec. I'm fairly new to image formats, codecs and compression, but I ...
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217
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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 ...
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Convert .mp4 video file for playback on camcorder
I have a .mp4 file with MPEG4 for video and MP3 for audio that I need to convert to make my camcorder (a cheap one I got off eBay) play it back, but the only problem is that it doesn't accept anything ...
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why is mpeg4 encoder faster than libx264 using ffmpeg
I have been padding mp4 videos so they can become of the size 1920x1080 instead of 1920x800. I used initially used mpeg4 encoder using ffmpeg, the encoding was quick but the size of the file was more ...
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How to encode XviD using ffmpeg for Home Theater/DVD Player?
I wanted to convert a file so I can play it my DVD player which only works with divx/xvid. I tried :
ffmpeg.exe -y -i "in.mp4" -t 480.00 -vf scale=720:301,pad=720:576:0:137 -map 0:v:0 -map 0:1 -b:v ...
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Repair MP4 corrupted index
I have a corrupted MP4 file whose length is 25 minutes, but fter the first 4 minutes it jumps ahead to 20 minutes and one cannot playback the middle portion.
It appears as though the index is ...
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40
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2
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91k
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Repairing corrupt MP4
I took a video from my Android phone (Sony Xperia P, if you need to know), and before I could stop recording it, the phone memory got full and the phone got hanged too. I rebooted the phone, the video ...
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166
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How can I truncate .m4v elementary stream files?
I have two .m4v MPEG4-Visual elementary streams which need to be truncated down to a specific length, leaving the same starting point and simply specifying a frame number at which to end.
I have ...
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Trancoding a video with vlc and the MPEG-4 codec with a video bit rate
When I try to trancode a video with vlc using the MPEG-4 codec and a video bit rate, I get the following error :
Either both buffer size and max rate or neither must be specified
Here is the command ...
- 1,007
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2
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3k
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How can I convert trp video format to mpeg4?
Has anybody had experience with converting TRP format to MPEG4 or any other format playable on a PC?
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What are the "software" requirements for a 3D video?
Today, looking for the technical explanations about MPEG4, I saw that it can implement the VRML rendering for a 3D video. This makes me wondering about the "software" requirements to make or to see a ...
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What do the numbers 240 and 360 mean when downloading video? How can I tell which video is more compressed?
I have downloaded some computer science lectures from YouTube recently. There is usually more than one choice of file size and file format to download.
I noticed that for the same video, the ...
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2
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7k
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Why does encoding a video using the MJPEG codec take longer than MPEG-4?
I am testing the encoding performance (MPEG-4 and MJPEG) of a smart camera. I have written an application in OpenCV/FFMPEG for performing encoding, where the application captures images from the ...
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MPEG-4 (Base Media / Version 2) to MPEG-4 (3GPP Media Release 5)
Hi I want to convert an MP4 file to work with a Sony Ericsson Aino
Here is a detailed comparison of the file format that I want to convert to which is MP4(3GPP) and the file that I want to convert ...
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What is the quickest way to merge multiple MPEG-4 files to a single DVD?
I am using Mac OS X 10.5
I have 30 MPEG-4 files, and I wish to burn these to a DVD that can be played in a standard DVD player (i.e. on a TV) What is the best way to burn these all to a DVD so that ...
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2
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avi to mpeg4 command line convertor
I am writting program for recording IP cameras videos.
I use Aforge framework and can save video in avi format, but it's size is too big.
I need some command line program to convert videos from avi to ...
44
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5
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67k
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Joining H264 *without* re-encoding
I have two halves of a single show in two .MP4 files, encoded in H264. I would like to join them without re-encoding.
Is this possible?
I managed to create a joined video as a Quicktime file (.mov) ...
- 861
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186
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Encode divx into iPhone-compatible MPEG4 while downloading?
Is there a way to encode a DivX file into an iPhone-compatible video file while the DivX is downloading/streaming?
Further, is it possible to re-stream the resulting iPhone-compatible video to the ...
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7
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1k
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Encoding Uncompressed video
I'd like to encode uncompressed video into compressed avi or mpeg4. Was wondering what program I should look at getting to do such a task. Videos are between 3 and 20 minutes long, and range anywhere ...
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Creating a DVD-player compatible movie file
I've created encoded a MPEG-4 file with mplayer and placed it on a DVD. The file is identified as
RIFF (little-endian) data, AVI, 320 x 240, 25.00 fps, video: FFMpeg MPEG-4, audio: uncompressed PCM ...
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3
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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 ...
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