Ubuntu Multimedia :: FFMPEG Scaling - Get Some Weird Green Band At Bottom Of Frame In Converted Video
Jan 14, 2011
I've got a 1920x1080 video I've edited and rendered with Cinelerra, and I'm trying to use ffmpeg to transcode it to something smaller. However, when I use a command like this, for instance:
Code:
I inevitably get some weird green band at the bottom of the frame in the converted video. I know that there's some weird pixel stretching going on here, because the NTSC standard for 16:9 is 720x480 with rectangular pixels, and the 1080 version has square pixels, so I'm guessing the green band is an artifact of that process?
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Jun 6, 2010
I am looking for a video editor that will let me open an AVI video and then save individual frames as image files (preferably JPG), I looked through the "Ubuntu Software Center" the only one that I found in there that would do this is "Video Cut" but when I try to open the 600+ meg AVI video I have it closes a moment later.
Anyone know of a video editor that will open a file this big and not crash?
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Oct 16, 2010
how I can decompose a video into its individual frame , so that I can apply my image processing algorithms to those images..
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Jan 27, 2011
I'm trying to encode a video using only one image during a complete audio file, but a can't find the way to do it. What I need to do is to extend the duration of the frame up to the duration of the audio file. How do I do that with mencoder?
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Oct 17, 2010
I want a video editing software for combining two videos at frame level. I mean, for eg: to show double action at a time in movie. We shoot two characters separately. And then we combine it as a single video with dual role effect. Now, I think you understood my requirement. Plz anyone tell that type of application which suits my needs.
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May 9, 2011
It seems to have only recently starting happening. I've tried VLC and Movie Player, and different types of format such as AVI and 3gp. Anything I could try to eliminate things?
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Apr 24, 2009
How this can be done? I already have the necessary codecs installed and have kde 4.2.
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Oct 13, 2010
During using I do something, I do not know??? I notices that a search box usually appears at the bottom panel when entering any characters in any folders is missing. See attachment below.how to retrieve it? I use v10.10.
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Aug 31, 2010
I'm having trouble to find the right ffmpeg options to encode a video that can be read on a htc G1 cell phone. I have used several codecs and formats but none is working.
I have followed these instruction to install ffmpeg and x264 [URL]
Here is my ffmpeg config :
Code:
FFmpeg version SVN-r24953, Copyright (c) 2000-2010 the FFmpeg developers
built on Aug 27 2010 22:44:01 with gcc 4.4.1
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-
[Code].....
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Feb 19, 2010
I am trying to get a listing of video information using ffmpeg or mplayer. I have found a way BUT it is only returning 1 piece of info..
Here is what I'm doing in PHP:
print exec("/usr/local/bin/mplayer -identify file.flv -ao null -vo null -frames 0 2>/dev/null | grep ^ID_");
But this will not provide an entire listing, it will only print out 1 thing such as:
ID_AUDIO_CODEC=mp3
I can specify what exactly I want to know something like:
print exec("/usr/local/bin/mplayer -identify file.flv -ao null -vo null -frames 0 2>/dev/null | grep ^ID_VIDEO_WIDTH");
but I want to just have all the info available at once instead of having to loop through like 20 times..
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Jun 5, 2010
is there a command to create a video from a mp3 and a png suitable to upload on ..... if anybody knows?
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Jul 15, 2010
I want to convert all video file in folder a become audio file in folder b use ffmpeg, how to type it in terminal?
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Aug 30, 2010
Anybody had any success in getting ffmpeg to work as advertised with video capture from a webcam? I really want to convert the webcam output to VP8 or H264, but apparently ffmpeg can't even capture the webcam with a video4linux device.
Code:
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Aug 13, 2011
I tried to trim a video in FFmpeg using this command:
Code:
ffmpeg -ss 00:20:48.500 -t 00:01:00 -i INPUT.mp4 -acodec copy -vcodec copy OUTPUT.mp4
But FFmpeg is not accurate and it started the video from a nearby point instead (from 00:24:46~). I tried to add 2 seconds to my starting point and it took another frame (not what I wanted).
The video source is H264 video with AAC audio.
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Jul 12, 2011
A couple of days ago, without updating the system or installing any software (AFAIK), a weird blank bar appeared at the bottom of the screen of my Dell Latitude 2100 (check the screenshot for a better detail).It looks like, somehow, the resolution of the screen is now smaller (1024x576) and Ubuntu doesn't recognize anymore this small band of the screen.
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Mar 11, 2011
I have some videos in an mkv container that are 1920 pixels wide, but less than 1080 pixels high. This causes problems when playing the videos on a PS3 (after converting to an AVCHD system), because the PS3 won't centre the video, leaving a very large black bar at the bottom but none at the top. Is there a way to use mencoder or ffmpeg to losslessly add padding to the top and bottom to make the video 1920x1080?
If I use
Code:
ffmpeg -i video.mkv -acodec copy -vcodec copy -scodec copy -padtop 132 -padbottom 132 out.mkv
then ffmpeg won't do the padding, and the resulting file is basically exactly the same. If I use
Code:
ffmpeg -i video.mkv -acodec copy -vpre libx264-lossless_fast -scodec copy -padtop 132 -padbottom 132 out.mkv
I get
Code:
Output #0, matroska, to 'anr.mkv':
Metadata:
encoder : Lavf52.64.2
[code]......
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Jan 3, 2010
I spent about a half hour wrestling with different website tutorials about how to convert a file with ffmpeg and figuring out how to get all the video quality options right. Then I discovered you can just use the -sameq option and it figures it all out for you if you don't want to change the vid quality but just want it in another format. Thought I'd leave this on the site in case anyone else finds himself in the same boat.
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Mar 1, 2010
I'm trying to write a bash script for gpodder to automatically convert video podcasts to play on my media player. I'm using ffmpeg for the conversions (compiled myself with all codecs enabled). I'd like to avoid resampling the video or audio whenever it's unnecessary but ffmpeg seems to want to resample my video even if I only give it audio parameters to change.For example I have a test video with the following parameters:
Code:
Stream #0.0(eng): Video: h264, yuv420p, 640x480, 1394 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 5994 tbc
Stream #0.1(eng): Audio: aac, 44100 Hz, stereo, s16, 159 kb/s
[code]...
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Jun 5, 2010
How do you loop a video a number of times in ffmpeg or mencoder? I made a ogv out of a gif. It loops 1 time, so it's less than a second.
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Jul 31, 2011
command line option in ffmpeg to do this
I am told I need the output file to comply with this
Video Resolution: 480*320
Video Bitrate: 768 kbps
Audio Bitrate: 128 kbps
Video Format: MPEG-4 (be sure not to use H264, as it�s not supported in the current firmware)
[Code]....
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May 15, 2011
i am using Ubuntu 11.04 on my computer system. I urgently need a good video converter for converting videos.I have already installed FFmpeg and men-coder,Winff etc. The problem is each has its own drawback.For instance ffmpeg cannot convert a .avi to .3gp with audio working. My preferences are the converter should be user friendly, should support all popular video formats.
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Jul 24, 2011
I am having problems with ffmpeg. My goal is to capture a video stream from my webcam and feed that into a webcam-capturing program. But to get that to work, I will need ffmpeg to work. I need the following command to work, but I get an error:
Code:
$ ffmpeg -b 100K -an -f video4linux2 -s 320x240 -r 10 -i $device -b 100K -f image2pipe -vcodec mjpeg - | perl -pi -e 's/\xFF\xD8/KIRSLESEP\xFF\xD8/ig'
ffmpeg: relocation error: /usr/lib/libavfilter.so.2: symbol avformat_find_stream_info, version LIBAVFORMAT_53 not defined in file libavformat.so.53 with link time reference
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Jul 20, 2010
Since ffmpeg 6 is out for some time, when will Ubuntu Lucid afford such a new ffmpeg package from its repository?
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Jul 26, 2010
I have a Core 2 Duo T9600. I noticed video playing performance has been really bad lately, and videos that used to work fine now stuttered. I would say it started happening 2-3 weeks ago. I discovered the culprit is that the CPU is scaling down to 800Mhz and sticking there. Running cpufreq-info yields:
[Code]...
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Feb 22, 2011
I am using ffmpeg for merge wav files to a mov video. My doing is below
1. First extract audio (wav file) from video
2. Create wav file from mp3 track 1
3. Create wav file from mp3 track 2
4 Merge extract audio from video with track 1 and track2.
Now finally create a new video with original video's video stream and merged audio stream.
Process is working. However final video is 3-4 times greater than original one. I want that final video should be near about size of original video. As I understand, all three wav files (created from ) make video larger.
Example commands i using is as below:
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Mar 26, 2011
Video player that runs on linux that allows for frame by frame advance. or that i can really really slow down . Because what i want if something that behaves like Quicktime. allowing for single frame advance.
My understanding is that VLC will never do that because it is more of a network stream ....animal.
also the player needs to play 422 uncompressed yuv yuy2 - avi or qt.
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Feb 19, 2009
I tried reinstalling a better driver for my laptop the other night so that I could get a better frame rate while playing C&C Renegade. I was only getting 10 FPS and my ping was insanely high. So I went about installing a new driver and when it rebooted it started up in low graphics mode, asking to switch the driver. I tried everything I could, but nothing seemed to work. Right now, I get the boot screen and login screen and it looks normal, but once I log in, it flashes my background like its loading without a problem, but then it goes to a white screen. I can see my mouse on the screen though, and I know everything is working behind the white screen, because I can click stuff and can see my CPU LED blink, and I can use my desktop cube when I hold CTRL+ALT+(arrow). So I'm officially confused. I'm assuming there has to be some way to restore my driver somehow... BTW, Same thing happens when I boot into Gnome, X script, and Gnome Failsafe. The only thing I can do is boot my Live CD.
Here are my specs:
Acer Travelmate 2450
40 GB Hard drive
CD-RW Drive
ATI Xpress 200M (up to 128 MB, which is what it's set at)
Atheros WLAN card
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May 27, 2011
I'm using Squeeze Gnome.
When I watch videos within my browser, they play fine until I expand it to full screen, then the frame rate slows way down.
I've been reading related posts, If I install the gecko media player, will that solve this problem?
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Feb 11, 2010
I've installed Ubuntu on my PS3 system, and when I play a DVD video using VLC the video is striped with green vertical bars. Naturally, i can't watch it like this, so I also tried Movie Player, which frezzes up alot, so then I tried Kaffine, which failed to work at all! Every video player I know is useless when it comes to playing some DVDs on my PS3, (I say some because others work fine, and no, there's nothing wrong with the DVDs thereselves).
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Jun 25, 2010
I used the script mentioned here [URL] to convert some wma files to mp3 however rhythmbox will not import these. Is this to do with the way they were conveted? Is there a better way or will converting wma to mp3 always result in this? Was going to try soundconverter but I wasn't sure if this would just do the same thing.
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