Questions tagged [ffmpeg]

FFmpeg is a free software project that produces libraries and programs for handling multimedia data. The most notable parts of FFmpeg are libavcodec, an audio/video codec library used by several other projects, libavformat, an audio/video container mux and demux library, and the ffmpeg command line program for transcoding multimedia files.

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My ffProbe script only seems to work with MKV files

Just learned about ffprobe yesterday, and I was able, after much googling, to assemble a command line BAT file to get the meta info I want. Then, it turns out that it only works about half the time. ...
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ffmpeg “Error while opening encoder for output stream #0:1”

Ok, this is probably a very stupid mistake on my part, but I am losing my head here. I have been using a simple command for transcoding MOV file for months now: ffmpeg -i SOURCE.mov -c:v libx264 -...
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640 views

Transcode FROM MPEG-DASH

I have an input MPEG-DASH stream and I want to transcode it. First of all, need to decode it and then route an output to FFmpeg and encode it, but not have any ideas how to decode MPEG-DASH. Please ...
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372 views

How to read frames which are separated by a specific number ? [ffmpeg]

I have around 1000 frames in *.png format, which are named like frame-0.png, frame-1.png, frame-2.png and so on. I read them and generate a movie by following command : ffmpeg -f image2 -r 20 -i ...
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mp4 to avi/mpeg conversion

I'm trying to convert an mp4 video to play on a digital photo frame. The photo frame (Living Image Li1210) manual states: The digital photo frame can playback MPEG1, MPEG2, MPEG4, and AVI (dependant ...
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FFmpeg transcoding libx264 set only one P-frame

I transcoding mpeg2 data to h264 via libx264 codec and need to create the following GOP structure: I(IDR) P I P I try to perform it with the following command: ffmpeg -i INPUT -vcodec libx264 -...
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1answer
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Multiple FFmpeg input & output

I just want to know if it's possible to encode audio & video at the same time by FFmpeg -c:a libfaac for audio & x264.exe for video. and any example!
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ffmpeg: Convert 4K 10-bit file to DNxHR 444

I have a 2160p29.97 AVI 10-bit RGB file recorded with a Blackmagic Intensity Pro 4K capture card. I want to convert this file to DNxHR 444. I used the following command to do so on Windows 10 with ...
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1answer
1k views

Error decoding timecode using ffprobe

I'm using ffprobe to get timecode from an mxf which has DF timecode but with a non DF frame rate. I'm getting the error Drop frame is only allowed with 30000/1001 or 60000/1001 FPS. I'm running ...
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2answers
58 views

Biggest possible resolution or go for common denominator?

I need to transcode 720p AVC videos to Xvid because they need to be played on a Samsung DVD player. The player can handle maximum 448 pixel high videos and automatically scales the picture up to 1080p ...
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347 views

IPTV Link loop ffmpeg

So I want to record a transport stream it's not a m3u http://flamingzebra.xyz/2728.ts I tried to record it in vlc it doesn't work The live stream is in fragments so I have to loop it. Can this be ...
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130 views

Split video or export keynote slides separately

I have a problem I am struggling for 2 days. Maybe someone can give me some light. I made a huge keynote presentation (100 slides), with videos and animations. I expected to have one small exported ...
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Any ffmpeg computing nodes out of there?

Sadly I don't have access to powerful workstations and it happens that I have to convert lot of videos, however I do have an high bandwidth network. Is there a free/paid computing cluster service ...
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1answer
521 views

FFmpeg - Synchronize external audio file

I'm creating some encoding templates for Multi-Bitrate streaming and I want to create a fallback that is audio-only. So when the bandwith of a users connection falls below x, it drops video playback ...
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3k views

Gstreamer 1.0 rtspsrc to rtp (audio and video)

Hi I'm currently trying to use gstreamer-1.0 to consume rtsp source and provide RTP streams for audio and video in the streams (for Janus Gateway). I have a working solution with ffmpeg so basically ...
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1answer
493 views

ffmpeg - H264 vs. H265 codec parameters?

When i try to run following command: ffmpeg -y -loglevel info -threads 0 -f lavfi -i aevalsrc=0 -framerate 60 -i image.png -start_number 000000 -apply_trc bt709 -framerate 60 -i seq1.%06d.exr -...
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1answer
919 views

ffmpeg / mencoder converting a video with correct setting

I have an avi video file that plays on my Onn-W7 player Link to avi video file that works and backup link to avi file that works. I'm trying to convert some other video files over so that they will ...
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1k views

ffmpeg - warnings when i try to merge several audio files with an .mp4 file

I'm trying to merge 8 audio (.wav) files with a video (.mp4) file. I have the following command: ffmpeg -i video.mp4 -i audio1.wav -i audio2.wav -i audio3.wav -i audio4.wav -i audio5.wav -i audio6....
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338 views

ffmpeg - map a video to a placeholder? (rectangle/square)

I have a video that i want to map to a "virtual rectangle". Meaning, i want to create a virtual rectangle by giving it one x,y point for the bottom left corner and one x,y point for the top right ...
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1answer
604 views

Transcoding vertical video to an intermediate codec

I used the Android SDK to record some steps for a tutorial video and am having some difficulty working with the footage. First of all, it's of a variable framerate and secondly it's in 1080:1920 - ...
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130 views

Heavy automatition with scripting for videos - ffmpeg?

Been here i found a lot of question involving ffmpeg and its filters, however the filters are already built-in and what you generally do is calling them with various parameters. What was wondering is ...
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1answer
125 views

Adding many sounds to a video file at specific frames

I have a video of a TAS I've created that unfortunately does not contain sound. I would like to add sound to the video before releasing it, but I obviously don't want to have to go through and place ...
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313 views

ffmpeg based JAVE video conversion taking a long time

I am using ffmpeg to convert videos to mp4 format in my application I have used JAVE and Xuggler for the same. My issue is that, video conversions are taking way too much of time. For example, a 50MB ...
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3k views

Screen capture AND audio recording in ffmpeg

I am using ffmpeg built from source at this revision in Fedora 20. I am able to record audio perfectly fine with the command: FFmpeg/ffmpeg -f alsa -ac 2 -i pulse -- output.wav However, when I try ...
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Stream a dynamic playlist to a RTMP server

My goal is to stream a dynamic playlist of video to Twitch. The problem is while I stream a file, I don't know which will be the next until the end of the current one. My playlist is a very simple ...
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0answers
263 views

Where to start Transcoding with FFMPEG?

I would like to learn a lot about Transcoding video files with FFMPEG from any format to mp4 (hH264/AAC) format. We have a large repository of video files ranging from 1 MB to 2 GB of various formats ...
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1answer
539 views

FFMpeg set language as Unknown or unspecified in a QuickTime MOV

I have to transcode with FFMpeg some video with multiple audio where various audio track are not language related, just music and so on. I would like to assing as language something like Unspecified, ...
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2answers
512 views

How to map streams to specific output streamIDs

I'm trying to map specific streams to specific output indexes. The command I'm using is more complex but it can be reduced to this simple example ffmpeg -i input.mkv -y -map 0:0 -c:5 copy -f mp4 out....
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1answer
440 views

How to loop .TS files from Folder with FFMPEG

I am using the code below as a batch file. The issue i am currently having is only one video in the folder keeps looping. How can i make all the videos play and loop? @echo off set FFMPEGDIR=E:\...
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4answers
164 views

Re-encoding Lossy formats with Lossless formats

I was re-encoding videos downloaded from YouTube with Lossless H.264 (using FFmpeg) because I'm experimenting with CRF=0. I found that resulting videos are much bigger (1 gigabyte) than the original ...
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1answer
51 views

How to deinterlace GRAY video and convert it to .avi?

I have binary data stream from analogue camera and convert it to .avi with this λ ffmpeg -f rawvideo -pix_fmt gray -s:v 700x220 -i orbita_d.bin -c:v rawvideo -pix_fmt yuv420p out.avi what do I need ...
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1answer
2k views

4:3 - 16:9 Aspect Ratio Conversion with Pillarbox and Textbox

I'm trying to use FFMpeg to adapt 4:3 (SD) to 16:9 (HD) and reverse function. When SD is converted to HD, I need to add pillarboxes around the content. When HD is converted to SD, I need to add ...
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1answer
90 views

what is the best library for converting video to multiple resolutions [closed]

as I see there are two popular ffmpeg and avconv, for example what uses youtube or other popular platforms for converting one video to multiple resolutions, subtitles and audio tracks etc...are these ...
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1answer
240 views

Where to input a log expression in FFMPEG

Im trying to use a expression from NUKE (to convert an exr sequence from its native format into AlexaLogC. Now ive got an expression from nuke which is the following x > 0.14996582 ? (pow(10,0, (x ...
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1answer
1k views

How convert avi and wmv to mp4 for html video tag?

I want to convert avi and wmv to mp4 for web and I use below code: ffmpeg -I input.wmv output.mp4 Is that enough?
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1answer
455 views

Streaming HLS from a video4linux2 virtual video device

I'm trying to accomplish a few things at the same time with the raspberry pi camera; create an HLS live stream take regular interval jpg snapshots and save them to disk irregularly record short ...
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1answer
91 views

FFMPEG 2 audio track input

Here is what I have so far . I just dont know how to add plughw:1,0 into the command . I have tested that recording does work on plughw:1,0 . function stream { ffmpeg -r 10 -threads 2 \ -f ...

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