Questions tagged [transcode]
The transcode tag has no usage guidance.
99
questions
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4
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What is the quickest, easiest way to compress an MP3 file?
I would like to compress an MP3 file, and I see a lot of references when searching Google, but it seems like by now someone must have found something easy and that is guaranteed to work.
Compressing ...
19
votes
4
answers
5k
views
Concatenating ogg video files from the command line
Okay. I've got a few ogg files I've created using a desktop recording tool. I've transcoded them using ffmpeg once (mainly to clip out the beginnings and the ends).
Now, I have 3 such files which I ...
- 679
12
votes
10
answers
54k
views
Painlessly convert FLAC to ALAC on Windows?
I'm wondering if anyone has a clean, painless workflow for losslessly transcoding FLAC files to their equivalent ALAC? It's supposed to be a bit-perfect conversion, meaning it shouldn't be very hard, ...
- 393
8
votes
7
answers
45k
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Converting AVI encoded file with an IMM5 codec
As part of a legal matter, I received a copy of a security video encoded using what appears to be an 'IMM5' codec, apparently often used by police. I also received a copy of 'BackupPlayer', which can ...
- 8,716
7
votes
2
answers
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Is FDK-AAC still better than FFmpeg's native AAC encoder?
I wrote this about a year ago while trying to compile FFmpeg for Cygwin/Windows, based on the claims made in the FFmpeg wiki:
The Fraunhofer FDK AAC codec library. This is currently the highest-...
- 13k
6
votes
2
answers
15k
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Which FFmpeg command do I use to passthrough FLV to MP4?
I've a number of downloaded FLV files which I would like to convert to MP4. They are already in the correct format so I am told all I need to do is to remux the video and audio streams into an MP4 ...
- 61
5
votes
2
answers
9k
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Parallel transcoding with FFmpeg on M1 Mac
I'm trying to determine how effective an M1 Mac would be for transcoding video using FFmpeg (specifically resizing and adjusting bitrate). I can do single transcodes using a command like this:
ffmpeg -...
- 51
4
votes
4
answers
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Any good open source software for media conversion?
I'm sick of people using annoying crapware for "free mp3 conversion" and the like.
Does anyone know of any good quality software that is perhaps open source or free? Sort of like how video lan player ...
- 421
4
votes
5
answers
7k
views
How can I batch convert flac files to wav?
I'm using Windows XP, and I have several (about 160) flac files which I need to convert to wav. Since it is not practical to convert so many one by one, I need a utility that can convert them, but ...
- 250
4
votes
3
answers
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Seek Issues in WebM (VP8 IVF/OGG) File
I have a file downloaded from the web this is the media below.
General
Format : WebM
Format version : Version 2
File size ...
- 576
4
votes
1
answer
10k
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Why is Plex Server transcoding file that can be direct played?
I've installed Plex Media Server in my Raspberry Pi 3. It works perfect but it doesn't have enough CPU power to transcode (when it tries the video freezes every two or three seconds). One of my Plex ...
- 685
4
votes
1
answer
4k
views
FFmpeg - Cut video into segments, transcode them individually, then concatenate & output to .ts
This is a follow-up question to audio error when concatenating clips using ffmpeg
What I'd like to achieve is the following:
Cut an input video into chunks
Transcode each chunk (video and audio) ...
user342545
4
votes
2
answers
2k
views
What is mencoder's -speed option doing?
I need to change the playback speed of a video, but can't use mencoder to do it. Changing the speed that a video plays at seems like the sort've thing that any video encoding software should be able ...
- 5,203
3
votes
1
answer
5k
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Realtime transcoding to H264+AAC in Matroska container
Scenario
I have a movie library which I'm looking to make streamable to my Android tablet using VLC for playback. I want to use H264+AAC for best possible visual quality over a mobile internet ...
- 534
3
votes
2
answers
1k
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Is it safe to omit the codec when converting with ffmpeg?
I noticed today that I could encode or transcode video and audio streams using ffmpeg without specifying a codec, due to the fact that it seems to imply the video or audio codec being encoded or ...
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3
votes
2
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3k
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How to extract a Vorbis stream from a WAVE file?
I would like to move the Vorbis stream into an ogg container but ffmpeg does not seem to recognize the stream.
Even though MPlayer gives this output upon playback:
Opening audio decoder: [acm] ...
- 668
3
votes
2
answers
3k
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Which video format requires least transcoding for versatile media streaming
I know this question is related a bit to this here, but I have a more specific aim.
I want to stream videos (in 1080p quality with multiple sound channels) to different devices (iOS, Xbox 360, PS3, ...
3
votes
1
answer
2k
views
Why does FFmpeg segment_times create webm files with incorrect duration and start times?
I have a MOV file that I want to split into several smaller files (at certain timestamps in a comma-separated list). I'm simultaneously compressing the video into WEBM files.
The command I'm using ...
- 1,976
3
votes
2
answers
4k
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ffmpeg equivalent for -movflags faststart for audio
I have several video and audio files on my server that I wish to stream. I have converted all video files to mp4 and audio files to aac.
Now I am streaming both type of files but it seems audio ...
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3
votes
1
answer
3k
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Codec choice for non CPU-intensive video transcoding
I am trying to achieve real-time transcoding of mkv / H264 videos on a low-end (slow CPU) platform.
Using the following command line as a testing harness:
avconv -i test.mkv -c:v mjpeg -q:v 3 -c:a ...
- 133
3
votes
0
answers
244
views
Can a processor gpu still be used for video transcoding if the motherboard is disabled from using processor gpu?
I am planning to get the following motherboard and cpu.
Asrock Rack e3c224d4i-14s Intel Xeon e3-1276v3
However, after reading the spec sheet on Asrock Rack/Intel Ark, the above mentioned motherboard ...
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2
votes
2
answers
6k
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Can I transcode a file with FFmpeg and read the output file on-the-fly?
I have a .M3U8 stream and I can download it and convert it with FFmpeg:
ffmpeg -protocol_whitelist file,http,https,tcp,tls -i "org_file.m3u8" -c copy -bsf:a aac_adtstoasc output.mp4
However I can't ...
- 173
2
votes
1
answer
320
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Reject DTS-HD MA
I have couple of video files containing both regular DTS as well as DTS-HD MA audio tracks. I want to get rid of the DTS-HD MA audio streams during transcoding, but have not figured out how to do so.
...
- 43
2
votes
1
answer
2k
views
Transcode videos to webm with lossless compression
I am using GNU/Linux(Arch Linux), and i need to transcode some videos from .avi/.mov to .webm.
I don't have the original file for most videos, only the "very compressed" .avi, and i can't loose any ...
- 1,121
2
votes
1
answer
449
views
How can I transcode a library of DVD Rips into a more compact/accessible format?
I have a hard drive that was filled with DVD copies of movies that I own, used in conjunction with My Movies to allow the children to easily watch the DVDs without having to mess around with and ...
- 576
2
votes
1
answer
155
views
Multitrack Video Does Not Transcode Real Time
Recently this Github page, dedicated to bypassing Nvidia's encode limit, added windows support:
https://github.com/keylase/nvidia-patch/tree/master/win
Up until now I've been encoding my 5 live ...
- 279
2
votes
0
answers
497
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ffmpeg cli settings for the most accurate seeking in the output video
I have a problem with video encoding for HLS stream.
I've found that most video players not support frame accurate seeking or pausing at specific frame and they can't really give us the accurate ...
- 35
2
votes
0
answers
913
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How to handle stream with ffmpeg and GPU
So in my project, I need to capture a video stream, decode the video, run the individual frames through an object detection algorithm and then play the output as a video.
This whole operation is ...
- 121
2
votes
0
answers
1k
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Getting Intel Quicksync working in Ubuntu 16.04 in headless mode for HW transcoding
/dev/dri and /usr/lib/dri doesn't exist.
vainfo returns:
error: can't connect to X server!
error: failed to initialize display
Aborted
lspci | grep VGA returns:
00:02.0 VGA compatible controller: ...
- 21
2
votes
1
answer
5k
views
Transcode Multiple Video Files at a Time in VLC
I am using VLC to transcode video files, in the convert/save menu it lets you select multiple files, but when you click Convert, it just converts the first file in the list. Ideally I would be able to ...
- 228
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0
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3k
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FFMPEG - Stream discovered after head already parsed
I am trying to live transcode an RTMP stream to another RTMP HLS stream using the following command:
ffmpeg -re -i rtmp://localhost/videochat/testing -c:v libx264 -c:a:0 libfaac -b:a:0 480k -f flv ...
- 121
2
votes
0
answers
300
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Transcoding from DVD to MP4 and intentionally skip frames in the middle
I have a DVD that I'd like to transcode from a DVD format to MP4 so I can play it on my iPad. Normally this is trivially easy as I could use Handbrake. But this has an interesting twist.
Around ...
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2
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1
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Why do audio files converted from OPUS to M4A have a much higher bitrate?
When doing:
youtube-dl -xf bestaudio/best <link to playlist>
...I get a lot of OPUS files at relatively "normal" bitrates like 130kbps.
However, when I run the same command with the ...
- 13k
1
vote
2
answers
3k
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Intel i5 Kaby Lake Hardware-Assited transcoding of video and audio to VP9 and FLAC using ffmpeg
I have about 30 gigabytes of video (mostly MP4, some MKV and webm) I need to transcode to 8-bit VP9 with Free Lossless Audio Codec (FLAC) audio in an MKV container from various input codecs (AAC audio;...
- 147
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3
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MKV to MP4 transcoding script issues
Ok, this one has got me scratching my head - specially as I'm a scripting nOOb, and my *nix expeirence is basic to say the least.
Summary
Need to identify why the shell script for converting filers ...
- 165
1
vote
1
answer
2k
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Thumbnail disappears when transcoding AVI to MP4 with ffmpeg
When I try to convert an very old avi to a mp4 with ffmpeg, the thumbnail disappears.
Is there a way to preserve the thumbnail or auto-generate one directly from the video stream, for example, using ...
- 11
1
vote
2
answers
5k
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Cut an FFmpeg video based on frames not a timecode
I want to cut a video with FFmpeg using something similar to the code below:
ffmpeg -i movie.mp4 -ss 00:00:03 -t 00:00:08 -async 1 cut.mp4
However I want to specify -ss and -t in frames instead of ...
- 200
1
vote
1
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571
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How do I transcode/compress mp4 source files on the Linux command line?
I have some rather large mp4s produced by my phone. They aren't very long, so they're probably not very compressed. What's an example of using a command line Linux tool to transcode one of these to ...
- 155
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1
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Transcode RTMP Live stream to multiple clients
I regularly follow livestreams on the website picarto.tv. The website uses RTMP for streaming, and therefore requires flash to show the video source. Many (mobile/embedded) devices don't have flash ...
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3
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1k
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How to adjust and combine multiple lower quality photos into one better using FOSS?
I have multiple noisy photos (caputed without tripod) that needs to be adjusted (moved/rotated) and averaged.
How it's better to do it in Linux with FOSS console-based programs?
Current way is ...
- 17.3k
1
vote
1
answer
321
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how to convert a given video file to all possible codec/container format combinations
I posted the same question in Video Production StackExchange site 8 days and there is not even a single answer to that up till now. So now I decided to try my luck here in Superuser site.
My semi-...
- 213
1
vote
1
answer
56
views
bash script variables not proper
I updated it a little bit, but I'm still not getting the results I should be getting:
#!/bin/bash
find "$1" -type f | while read filename
do
videoCodec=$(ffprobe -v error -select_streams v:0 -...
- 11
1
vote
1
answer
2k
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Bulk transcoding ISO/IMG to MP4/MKV
I need a tool/script to help me convert my collection of DVD's to MP4. I've started using Plex instead of playing each image-file directly and it's quite a pain in the butt to manually convert a ...
- 11
1
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1
answer
387
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Converting problematic 9.99fps video to something standard (ffmpeg?)
I recently got some CCTV video released to me via a FOIA/PA request. I'd like to put up the full version on YouTube, as well as version edited w/ Final Cut Pro. However, Handbrake, Quicktime, Final ...
- 203
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vote
1
answer
6k
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Transcoding Video to QuickTime Animation (RLE)
I need to transcode video created using the Camstudio Lossless Codec into the QuickTime RLE format in order to get it to work with some other software.
What methods can I use to convert the video? I ...
- 344
1
vote
1
answer
1k
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Reuse transcoding outputs to generate multiple files with AvConv
I am trying to find information about how to transcode a file into multiple outputs in one shot, but I don't seem to be able to. Most of the results I find describe the opposite: merging multiple ...
- 117
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1
answer
6k
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What media server can stream (transcode) video to my television yet retain surround sound?
As is often the case, in writing this question I found my answer. Posted below to aid others. New and different answers are more than welcome.
My television is a Network Media Device (NMD) and thus ...
1
vote
1
answer
3k
views
How to watch cell phone videos on Linux (3gp, mov)
I'm probably missing something obvious, but I have huge trouble watching .3gp videos (taken with my Android phone) or .mov videos (my friends send me from their iOS devices) on Linux. I'm running ...
- 429
1
vote
3
answers
3k
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Convert video files for Maemo (Nokia N900) using ffmpeg/mencoder
I'm a newbie in video encoding so I'm looking for some expert advice.
I'm looking to transcode media files with ffmpeg or mencoder (or something other) on Ubuntu for my Nokia N900 running Maemo.
I'd ...
1
vote
0
answers
375
views
How to use VP9 transcoder when streaming video in VLC Player?
I was trying to stream video with VLC using the very low latency VP9 encoder.
Both my OS codec library and VLC player (3.0.16) has been upgraded to the latest version
When I select VLC Player > ...
- 121