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Questions tagged [transcode]

105 questions
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Which portable tools and libraries are recommended to transcode audio with time stretching/crunching while maintaining meta-information?

I'm looking to implement a podcast transcoding tool/script that uses as many existing tools as possible. What combination of tools and libraries would you recommend? Objectives: Automate transcoding audio subscriptions (spoken word podcasts) to a…
Pedro Palhoto
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Mac Command line mkv audio only transcode

I have a mkv-file with h264 video and one 5.1 audio track. I would like to have a m4v file with h264 video, down-mixed audio and 5.1 sound using the command line. I could use sublerCLI to convert to m4v, but it does not transcode the audio. I could…
Daniel
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merging video files in to split-screen

I'm taking in video with an online flash applet (such as tokbox, but yet undecided). I need to combine multiple video streams in to one movie with up to four videos arranged together in a square. Can I use transcode server-side? Can I use a…
Peter Ehrlich
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Transmux two videos to side by side without reencoding

I am wondering if it would be possible to merge two videos (side by side) without transcoding. The streams are identical except the pictures are different. Think IP cameras on a LAN. I am on a platform where I dont have compute power for real…
TAXfromDK
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FFMPEG map 7.1 surround to 5.1 during transcode

I have a ProRes MOV whose audio contains 8 channels of audio in a 7.1 surround layout (L R C LFE Ls Rs Lt RT). I am preparing an H.264 MP4 for a media player that only supports AAC, and does not support 7.1, so I would like to map to 5.1, dropping…
dongle
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How to transcode audio from an RTMP stream in real-time to an audio stream

I’m looking to transcode the audio from an RTMP stream in real-time to an audio stream. I am currently having the RTMP stream published to an RTMP server (https://www.npmjs.com/package/node-media-server). From there, I would like to be able to…
catfishq55
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Cut video via ffmpeg so that timecode of the first frame will remain

I am slicing subclips using ffmpeg 5.1 and the command ffmpeg -ss 5 -i input -t 10 -c copy -y output I want my subclip to start at 5 seconds instead of 0 seconds. Is there an option in ffmpeg to implement this logic?
Vladislav Stepanov
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Xerces 3.2 XMLString::transcode not working on special characters

I have this xml file : And this simple C++ program using Xerces 3.2.3: ... //const XMLCh* xmlch_OptionA =…
Samikaze
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Implementation of transcoding using only bitwise operators

I have function to transcode input hexadecimal number. For example I have initial format of number like this And function transcodes it to this format: I will return result from function as a string using hex built-in function. I tried something…
WideWood
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Two videos playing, how to crop the second video in FFmpeg

I'm totally new to FFmpeg and I'm still learning. I've been trying to combine two videos into one. Where there is a "main" video that plays and a secondary video that is much smaller in the corner. I have managed to figure out almost everything on…
Rorlingur
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Convert image to a fixed format for throwing away all the extra annotations

I am trying to implement attachments in my application and user is able to upload image files (png, jpg, jpeg). I have read OWASP recommendations for image uploads, and one of the tips was to - convert the input image to a bitmap (keeping only the…
Andrius Kankevičius
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Video transcode and codec issue

I'm converting some old videos to play on my Roku via a dlna server. I'm trying to understand the MP4 container better to optimize conversions. I have an ogm video: Duration: 01:00:38.22, start: 0.000000, bitrate: 1056 kb/s Stream #0:0: Video: mpeg4…
maddogandnoriko
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I get an org.apache.batik.bridge.BridgeException from apache png transcoder

I want to generate a png from a svg string with this code: try { PNGTranscoder coder = new PNGTranscoder(); StringReader reader = new StringReader(getSVG()); …
user10536157
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display progress bar for ffmpeg process in front-end

I'm working on a cms project in which i have to transcode video files using ffmpeg. The transcoding proecss has been successfull. But i have to display the progress of the ffmpeg process in front-end. I tried pytranscoder,which failed to display the…
user8123592
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Quickest and most reliable way to get clips of h.264 video from VLC saved uncompressed

I am trying to set up a pipeline to record video clips while I watch movies (usually but not always in h.264) and prepare them for editing in Premier. I usually watch videos using VLC, and the "record" button is perfect. However, in order to edit…
Stonecraft
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