Questions tagged [conversion]

Conversion is the process of changing one format is to another. Usually this means a software conversion like from MOV to MP4, but can also be a hardware conversion like from HDMI to composite with separated chroma and luminance by cable.

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28
votes
2answers
55k views

How to downsample 4k to 1080p using ffmpeg while maintaining the quality?

I have some 4K 3840x2160 footage in MP4 format that I need to bring down to 1080p. I tried running ffmpeg -i orig.mp4 -vf scale=1920:1080 smaller.mp4 but the result is very poor quality, with the ...
12
votes
1answer
13k views

Can I set the start number for image sequence output?

I am using ffmpeg to convert from video to an image sequence as follows: ffmpeg -i video.webm image-%03d.png The first image is labelled 001, but I want it to be labelled 098. Is it possible to set ...
10
votes
1answer
13k views

Video converted by FFMPEG has a different duration, why?

I convert videos using FFMPEG. My goal is to convert them to the MP4 container format (MPEG-4 Part 14) with AAC-encoded audio stream and MPEG-4 part 10-encoded video stream. I use the following line ...
8
votes
1answer
18k views

High quality ogv files - possible?

I'm converting mov (or flv or mp4) files into ogv. Unfortunately, the programs I've been using (Miro, FFMPEG's ogv plugin) have terrible encoding that appears extremely fuzzy. Does anyone have ...
8
votes
3answers
42k views

How can I use FFmpeg to lower the quality of H264 video but keep it in H264 format?

I'm a complete noob to video editing, so forgive me if I ask for something ridiculous. I'm getting video clips from a set top recorder box. The clips are AVI files: Resolution: 1920 x 1080 Frames ...
8
votes
1answer
2k views

Batch resize videos with “pan and scan” cropping

I am trying to prepare a collection of ~120 video clips to be played in VLC Player and projected on a low-res (1024x768) projector during a DIY electronic music event. The source clips are all super ...
7
votes
1answer
6k views

Apply custom lut via ffmpeg?

I'd like to batch convert some log footage as well as transform each clip into rec709 colorspace. Is there any way to apply a custom lut to the footage? If so, what's the correct way to do that?
7
votes
2answers
2k views

Converting video with different resolutions slightly affects in file size, why?

I'm converting a video with resolution 960x720p using HandBrake on Mac. When I convert two videos with exactly the same settings but with different resolutions, the file size is almost the same. ...
7
votes
3answers
3k views

How to digitise old NTSC home videos for highest quality (with PAL player)?

I have some old VHS home videos that I'd like to digitise to preserve them, and I'm looking for the "best" way to do that with my setup. The videos were recorded around 1990, in the USA. I'd say they ...
6
votes
2answers
3k views

Automatic conversion/encode video for Video On Demand streaming

I need an automatic solution to convert video clips for html5 (mp4/x264, webm/vp8) and flash (mp4/x264) video-on-demand streaming. For a site like Youtube, just much smaller. The input files are ...
6
votes
2answers
7k views

what graphics card features effect NVIDIA NVENC hardware encoding speed?

I have a web project I am working on that requires transcoding of multiple short video clips (6-10 seconds) uploaded by users into a web friendly H.264 format on my linux server. I have been able to ...
6
votes
1answer
2k views

Convert fisheye videos to equirectangular videos

My goal is to quickly create equirectangular videos from full-frame fisheye videos with a given hfov. Panoramatools, especially mpremap allow that but it takes long for each single picture. Given that ...
5
votes
1answer
1k views

Video transitions and filters - how to create custom ones?

I am wondering if there is a possibility to do custom video transitions or filters. Like the video spiraling out, little squares appearing, circling out or something like that. Wiping the video out ...
4
votes
1answer
16k views

FFMPEG convert video with multiple audio streams?

Ok so I have a video made from dxtory. The video is using dxtory video codec and unknown audio codec. When I pop the file into avimux, I can clearly see two audio tracks/sources. I have successfully ...
4
votes
1answer
3k views

How to concatenate two mxf files with ffmpeg, preserving both audio channels?

I have mxf files which went over the 2G limit, so were split up in the camera to produce two mxf files. They have two audio streams, one from each mic, like this: Duration: 00:10:01.60, start: 0....
4
votes
2answers
3k views

Command Line Tool for Converting Image Sequence to Quicktime .mov Video

I have large number of numbered .tif files and I'd like to convert them to a .mov/Quicktime video file for further editing in Final Cur Pro X. Therefore no artefacts should be added in the process. ...
4
votes
2answers
153 views

Star Trek Continues: ffmeg dvdsub: overlapping subtitles

So I've downloaded the free fan-created Star Trek Continues Blue-Ray ISO for Episodes 1-3 and I'm trying to convert the FHD 1920x1080 to SD 960x540 to be able to watch on my phone: ffmpeg -...
4
votes
1answer
2k views

Video metadata: What is “Video delay” used for?

Recently, I'm forced to fiddle with a nasty little problem with videos that have some special metadata attributes, namely "delay" or "delay_relative_to_video". There's a software videoconferencing ...
4
votes
3answers
814 views

How to batch process hundreds of videos?

I have hundreds of videos in storage I need to distribute online. I'd like to do the following for each clip: Add a pre-roll video Process the audio (audio leveling, generic hiss/noise reduction for ...
4
votes
1answer
310 views

Easisest way to convert whole DVD folder (all titles and chapters) to MKV file(s)?

I have lots of movies stored as DVD folders(.bup, .vob, .ifo files); I am looking for the easiest way to convert each folder into one (or more) mkv files (preferably by using freeware program(s)) ...
4
votes
1answer
2k views

open-source or free AVCHD conversion to image sequence

I am looking for a good and free option to convert AVCHD (Full-HD from a Panasonic Lumix GH1) to image sequences. I am currently using Blender but it is cumbersome in that it only allows me to convert ...
4
votes
3answers
387 views

Recommended Encoding for VHS to Digital to be Followed by Post Processing

I have VHS tapes that I want to digitize. I started this using something like Pinnacle's Dazzle. I notice that the only encoding options were for compressed video, which could lead to quality ...
4
votes
3answers
483 views

Is there an online video converter?

Does anyone know of any services that will convert a large video (1gb+)? I've a bunch of files I'm looking to convert from mkv to mp4's. I'm on an older Mac and I've looked at some sites like video ...
3
votes
1answer
40k views

Big difference in the video file size after the conversion (.mov to .mp4)

After converting from .mov into .mp4, a video file is greatly reduced in size (.mov - 75,2mb .mp4 - 11,9mb) - does this mean that the converted video degraded (loss of color information, or the ...
3
votes
1answer
1k views

FFMPEG stop converting from TrueHD to PCM

I'm trying to convert a TrueHD 7.1 soundtrack to PCM format but ffmpeg give me an error and stopped. Here's the output of ffmpeg: user:~$ ffmpeg -i source.thd -c:a pcm_s24le -ar 48000 output.wav ...
3
votes
2answers
3k views

why is a video file with .mts extension so huge?

I just recorded a 2 minute long video clip with my Sony camera. The output is an .MTS file, which is ~450 MB. What is the reason for that? Could you please recommend a (preferably free) app that I ...
3
votes
1answer
276 views

An easy way to create videos for YouTube from mp3 files

Is there an easy way to convert multiple mp3 files to video files at once? I could of course use a simple video editor, but I was thinking more of an app that would take multiple mp3 files, set the ...
3
votes
1answer
7k views

ffmpeg to convert and merge 3 videos to a single widescreen video

I have three .mov files with video in Apple ProRes (apcn) and audio in PCM S24 LE (in24), of identical length and dimensions (1920x1080), frame rate (23.976024) and each with the same audio track. I'd ...
3
votes
1answer
5k views

convert horizontal side by side to vertically stacked 3D video

I have seen this and this post explaining how to crop and stack videos using ffmpeg. My question is - is there an easy (preferably one step) way to turn a horizontally stacked video into a vertically ...
3
votes
2answers
3k views

create subtitles track by automatic timing of existing text

1 00:00:01,000 --> 00:00:04,000 I am using Adobe Premiere to produce videos in English by gluing together multiple clips put together from lots of different footage or sources. I do have a text ...
3
votes
2answers
3k views

How to convert variable frame rate videos?

I have some old 3GP (mp4v codec)videos from my HTC desire S and when I try to drop them into Vegas they won't open so I decided to convert them to a format that would open. However when I convert to a ...
3
votes
1answer
780 views

How can I convert a video to BPG format? BPG= Better portable graphics

I am trying to embed video into my site. And since loading time is important, I want to implement it using BPG. The author of this post implemented it https://eek.ro/why-bpg-will-replace-gifs-and-not-...
3
votes
2answers
1k views

How do I convert a series of PNGs into an AVI using Avidemux?

I'd like to convert a series of PNGs (in this case 180 in total) into an AVI movie using Avidemux. I've tried opening the first of these numbered PNGs (starting at 1I090001.png ending at 1I090180.png) ...
3
votes
2answers
325 views

Convert FFMPEG Waveform Back to audio

I'm trying to convert an audio file to an FFMPEG waveform, train it in HyperGAN, and produce an image file to convert to an audio file. What I'm asking is if there is a way to convert a waveform image ...
3
votes
1answer
299 views

Best quality conversion from VHS to digital domain (USA)

I (like everyone else) have some old home movies on VHS, VHS-C and 8MM (and maybe a couple DV even...). I'd like to get them on my computer so I can edit them and store them. In the past, I've used ...
2
votes
3answers
2k views

Quality of VHS converted to DVD

I work for a small library. We have a collection of VHS tapes that we have recorded to DVD using a Magnavox VHS HQ DVD recorder. They came in as .ogg, They came in a a set of files including some .VOB ...
2
votes
4answers
749 views

Converting from 3/4" video to digital.

Our company has approximately 27,000 hours of video stored on 3/4" video tapes. We have begun the process of converting the video digitally with the current setup: Sony U-MATIC VO-5850 & Sony UVW-...
2
votes
2answers
95 views

How can I efficiently convert MOV / MPEG-4 files for long term storage?

I have a Canon 6D DSLR that I am shooting video on. The camera is set to capture 1280x720 60fps IPB MOV / MPEG-4 files. The video files are in the range of 250MB per minute of recording. I have ...
2
votes
3answers
3k views

FFmpeg MP4 to FLV too slow

I am converting .mp4 files to .flv using ffmpeg in centos. But the conversion time is extremely too slow! It takes about 1.5 hours to convert 500MB .mp4 file into .flv. I am using a linux vps with 2 ...
2
votes
1answer
13k views

Problem converting TS to MP4 container with ffmpeg

I have a video stream I captured with VLC and saved as a TS file. The codecs within the file are h.264/AAC, so I thought it would be trivial to use ffmpeg to convert the file from a TS container to ...
2
votes
1answer
206 views

How to convert video for viewing on Sony Ericsson C702?

I'd like to convert some of my videos for viewing them on Sony Ericsson C702 cell phone. But I couldn't find the right set of parameters (a/v codecs, container, etc.). I'd prefer a solution using ...
2
votes
1answer
2k views

Convert resolution 4096x2304 to 3840x2160 keeping the quality the same

I have recently come into possession of a couple of 4k movies with a resolution of 4096x2304. Unfortunately my Samsung 4k TV wont play anything over 3840x2160. I have managed to re-encode the videos ...
2
votes
1answer
6k views

Why does VLC player convert a 4-minute mp4 to a 4-hour webm?

I used standard webm settings in VLC player 2.2.1 (the latest) to convert a 4-minute mp4 made in Handbrake. In the conversion panel it says "Streaming 04:00" but the end result is "03:49:15" and, on ...
2
votes
1answer
11k views

How can I reduce the size of a webm to 2MB?

Let's say that I have a webm of XMB, and I want to resize it to 2MB in order too upload it to some websites. How can I do it? Is there a website? Can I downsize them in mass?
2
votes
4answers
6k views

What is the most lossless way to rip a laserdisc to a Mac?

I want to rip a LD to my Mac as a digital video file. I will create a DVD from this file eventually, but I'm primarily interested in playing it on my laptop. What video output from the Laserdisc ...
2
votes
1answer
487 views

Bit rate reduction when converting 60fps footage into 30fps?

I'm shooting at 60fps, the result is video playing back normal speed but displaying 60fps. I then have stretched the clip so that i get 30fps playback speed with a slow motion clip twice as long as ...
2
votes
3answers
3k views

Final Cut Pro X Sharing to DVD 66% error? Slideshow compression?

I created a Slideshow in Final Cut Pro X. I need to burn a DVD, I need to upload to YOUTUBE and I need to put on a jump drive. I can export to Master File, however when I try to burn to DVD it only ...
2
votes
1answer
1k views

Unable to hardcode subtitles in FFmpeg on Mac to mov

I would like to hardcode subtitles using FFmpeg, I'm trying to do this using the following command: ffmpeg -i grdedFinal.mov -vf subtitles=portSbs.srt gradedFinalwithSubs.mov which returns the ...
2
votes
1answer
5k views

ffmpeg Color conversion - 709 to 601

I am downscaling an HD movie from 1920x1080 to 720x576 and want to make sure the color conversion is done correctly, which with my current settings I am sure it is not. I am coming from an HD Prores ...
2
votes
1answer
5k views

Improving frame/image quality on Handbrake?

I created a .cdr file from a DVD and converted it to an .mp4 with Handbrake. My only issue is Handbrake's default settings create a somewhat grainy picture. The file size went from 1.24Gb to ~100Mb so ...