0
votes
0answers
32 views

Converting avi to mp4 with h.264 codec [closed]

I had been trying to convert my avi file to h.264 codec to be able to use it in Latex. I tried every example i could find online , and most of the time the converted video is blank! However a ...
1
vote
1answer
128 views

What is the lowest FPS at which the human eye can notice a flickering image? (testing this with ffmpeg)

I wanted to check what the lowest FPS is that the human eye cannot notice as flicker. I created a white jpg and a black JPG. I started with 25 fps which means that I have 24 jpg of white and 1 of ...
0
votes
0answers
329 views

What video codec over RTP protocol?

I 'm trying to achieve video streaming from a Linux server (ffserver) to a Windows client (VLC player). Although I made it over HTTP protocol, I want the multimedia to be transferred over RTP ...
1
vote
1answer
49 views

Keep input codecs

I have an MKV file with H.264 video and AAC audio. With FFmpeg the default audio codec for MKV is AC3, so if you run a command such as ffmpeg -i infile.mkv -ac 2 outfile.mkv it will transcode the ...
0
votes
1answer
841 views

Optimum parameters for FFMPEG to keep file size

so the idea is: I want to convert every.single.video I have in a 1 terabyte drive to a format that my Chromecast can play (https://developers.google.com/cast/docs/media) and I'll happily leaving my ...
3
votes
1answer
4k 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 ...
0
votes
0answers
186 views

FFMPEG doesn't convert from m4v files

I am trying to transcode an m4v file from iTunes so I can play it on Windows or XBox. I am running ffmpeg from Windows. Is there some -vcodec I need to specify or something I need to install? ...
0
votes
0answers
139 views

Multimedia codecs for SUSE Linux Enterprise Desktop 11

I've bought notebook from HP with pre-installed SUSE Enterprise 11. I registered system during installation process and upgraded it. I can play all music files but I cannot find any codecs for movies. ...
0
votes
1answer
3k 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
1answer
1k views

get avi file with codec UMSV to play in vlc, or convert with ffmpeg

I have some video from security cameras. The program outputs in avi file extension. I can play the file in Kaffeine (openSUSE 12.3) but the file doesn't play in vlc--says it does not play files with ...
1
vote
2answers
566 views

Which codecs are supported by ffmpeg libraries in system?

I have Linux server/workstation box which had ffmpeg compilled for it some time ago. Now one type of library for internet communication does not seem to work on one of the endpoints. I think that real ...
1
vote
2answers
804 views

can't find a mp3 codec on ubuntu

Trying to convert an audio CD to mp3. ubuntu says ffmpeg is deprecated and I should use avconv Here are the codecs after i installed all I could find in aptitude for libav that provided codecs. ...
1
vote
0answers
233 views

Fix audio codec error with ffmpeg

I had an AVI (XVid) file with 2 audio channels. I removed the FIRST audio channel using ffmpeg as: ffmpeg -i <input.avi> -acodec copy -vcodec copy -map 0:0 -map 0:2 <output.avi> Now, ...
1
vote
1answer
364 views

ffmpeg get to Unhandled pixel format 0x11111111 only with some images

Hi I'm using ffmpeg to transform images in video. I need 1 still image for a video of 2 seconds, I'm using this call: ffmpeg -loop 1 -i img.jpg -t 2 -vcodec mpeg2video result.avi If I use some test ...
0
votes
1answer
790 views

ffmpeg .mkv to .mkv with audio .aac compression

I am trying to use ffmpeg on a .mkv video to change soundtrack quality. I would like to lower the bitrate of the audio part (to 16 kbps) without any modification of the video. Nevertheless when I use ...
0
votes
1answer
727 views

Specify MPEG-4 as encoding parameter in FFmpeg

I want to ask about mpeg4 codec parameters. I use it to encode video in Evalvid environment as follows: ./ffmpeg -s cif -r 30 -b 64000 -bt 3200 -g 30 -i raw.yuv -vcodec mpeg4 vid.m4v The video will ...
1
vote
0answers
256 views

How to encode a video with timestamps in order to have audio/video sync

DISCLAIMER: I am unfortunately very new to codecs and using FFMPEG, so I apologize for any incorrect terminology or if this is in actuality a very easily resolved question. I have a sequence of jpeg ...
4
votes
1answer
922 views

What lossy audio formats are more (or less) “efficient”?

This question is related to the answers I got to this question. The bitrate-efficient format (see the question's most voted answers and their comments thereunder) would be one that assures a good ...
2
votes
2answers
690 views

How Video4Linux and ALSA work with Codecs

My understanding is that a codec is both a decoder and a specification for decoding. So some group writes a codec which explains how to decode from their format back into the raw bitstream, and they ...
4
votes
1answer
4k 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: ...
0
votes
1answer
2k 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
3answers
7k views

Which codecs are most suitable for playback with Windows Media Player on Windows XP?

I need to encode a short video in a format that can be played with windows media player on windows xp without installing any additional codecs. For the recoding process I'm using ffmpeg. I've already ...
1
vote
2answers
2k 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 ...
2
votes
1answer
804 views

ffmpeg encoded video - seeking is “quantised” in VLC

I'm running the following command to convert an mp4 video into the VP8/Webm format: ffmpeg -y -i lists.mp4 -f webm -vcodec libvpx -vb 600k -r 20 -acodec libvorbis -ab 64k -ac 1 lists.webm When I ...
1
vote
1answer
410 views

ffmpeg: video file played OK on Ubuntu, but no sound on XP

I created a video clip using ffmpeg (vcodec: mpeg2video, acodec: AC3 5.1). The file can be played normally on Ubuntu, but when I play it on an XP machine, there is no sound. I can play AC3 files and ...
1
vote
1answer
4k views

FFMPEG able to convert m4a -> mp3, but unable to convert mp3 -> mp3?

FYI: Fedora 8 running on Amazon EC2... Having a difficult time with FFmpeg doing a (what should be pretty simple) conversion. I can get FFmpeg to encode an mp3 file from an m4a file using the ...
2
votes
0answers
2k views

Stream video with FFMPEG, “Output file does not contain any stream”

I would like to stream an H.264 encoded elementary stream wrapped in RTP headers to a port using FFMPEG. I have tried the following command lines to no avail... ffmpeg -i 1080p_1.h264 -f rtp -vcodec ...
2
votes
0answers
910 views

Best video and audio format for small file size with very unnoticeable quality depreciation [closed]

I need to bring down disk space of my file-sharing website suggest me an audio codec and video codec which works with FFMPEG and can reduce file size with little or no loss in quality . Thanks.
4
votes
2answers
8k views

What's the difference between FFmpeg's “-vcodec copy” and “-sameq”?

What is the difference between using -vcodec copy and -sameq with FFmpeg? Do they do the same thing?
1
vote
3answers
515 views

Why is my ogg bigger than my m4a?

I am using the following commands to encode an audio file to m4a & ogg formats: ffmpeg.exe -i 0123456789 -ab 192k out.m4a ffmpeg.exe -i 0123456789 -f wav - | oggenc2.exe - -r -q 6 -o out.ogg ...
0
votes
2answers
2k views

How to convert mjpg file type to flv using ffmpeg?

I can convert avi, wmv and other video files easilly, but not this format. I`ve looked for some info how to convert mjpg files with ffmpeg and found nothing. As this format is widely used in web ...