Super User Stack Exchange
Super User Stack Exchange

Questions tagged [transcode]

93 questions
19
votes
4 answers

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 an MP3 file into a ZIP archive doesn't compress…
Geoffrey Chetwood
  • 483
  • 2
  • 6
  • 20
19
votes
4 answers

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 want to concatenate into a single .ogv file. I…
Noufal Ibrahim
  • 689
  • 4
  • 16
12
votes
10 answers

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, but.... it is. Why would I do this? (Before the…
Tom Corelis
  • 393
  • 2
  • 4
  • 12
8
votes
7 answers

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 play this video. Note that no media player I have…
ChrisInEdmonton
  • 8,656
  • 7
  • 42
  • 49
6
votes
2 answers

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 container using copy/pass through. I'm on Windows 7…
user338034
  • 61
  • 1
  • 1
  • 3
5
votes
2 answers

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-quality AAC encoder available with ffmpeg. Requires…
Hashim Aziz
  • 11,898
  • 35
  • 98
  • 166
4
votes
1 answer

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) individually using x.264 and libfdk_aac into a .ts…
user342545
4
votes
5 answers

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 also preserve the metadata. It is crucial that the…
ayane_m
  • 251
  • 4
  • 18
4
votes
3 answers

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 : 10.3 MiB Duration …
Aivan Monceller
  • 567
  • 2
  • 10
  • 21
4
votes
2 answers

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 to do, but mencoder is the only one that I've…
blahdiblah
  • 4,873
  • 2
  • 22
  • 30
4
votes
4 answers

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 is a good solution for playing different types of…
Matthew
  • 431
  • 2
  • 5
  • 13
4
votes
2 answers

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 -I in.mp4 -nostdin -c:v h264_videotoolbox -c:a…
Pushkar
  • 41
  • 1
  • 3
4
votes
1 answer

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 clients is an LG TV and I find Plex Server…
Diego
  • 655
  • 9
  • 16
3
votes
2 answers

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 files are taking longer, much longer, to begin playing…
Zaid Amir
  • 207
  • 3
  • 7
  • 17
3
votes
1 answer

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 is: ffmpeg -i original.mov -map_metadata -1 -map 0…
Ryan
  • 1,736
  • 11
  • 41
  • 68
1
2 3 4 5 6 7