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Questions tagged [transcoding]

Transcoding is the direct digital-to-digital data conversion of one encoding to another (video and audio format)

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AWS Lambda for MPEG-DASH transcoding

I'm a bit confused. I'm setting up a lambda for transcoding an MP4 into a MPEG-Dash for adaptive steaming. There are 4 presents for this MPEG-DASH Video 600 k 1351620000001-500050 MPEG-DASH Video 1200 k 1351620000001-500040 MPEG-DASH Video 2400…
beek
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Use MediaTranscoder.PrepareStreamTranscodeAsync() with a memorystream?

In the apirefference it says that the source cannot be a InMemoryRandomAccessStream or any other writeable stream. But i need to transcode a InMemoryRandomAccessStream. I tried converting the Stream but it didnt work: InMemoryRandomAccessStream…
SinOfficial
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Start ffmpeg transcoding with php

Hey there! I want to restart a live stream by hand via a php script. Everything works fine so far, but the following command causes that the script loads forever and the transcoding isn't working: nohup openRTSP -v -c rtsp://*****.dyndns.org:665 |…
acy
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FFMPEG outputs stream to UDP port, but no packets received on that port

I am a bit new to FFMPEG and will appreciate any help I can get! Basically, I am trying to transcode a 'webm' UDP stream to Opus audio stream, and then finally output that to a specific UDP port on my network. This is the command I am using: ffmpeg…
user10260735
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AWS Elemental MediaTailor Transcoding VAST ad at different framerate

For testing purposes, I have my MediaTailor Ad Decision Server set to be a static VAST tag, which points to an .mp4 video hosted on an S3 bucket that I control. The frame-rate of this .mp4 ad in the VAST response is 23.976. However, MediaTailor is…
Sam
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watermark on transcoding rtmp video nginx

Hello i am transcoding video with rtmp and i want to put some text...i put Arial.ttf in my home directory of the server but doesnt work.. this is my command.. -map 0:0 -map 0:1 -strict -2 -crf 26 -vcodec libx264 -preset superfast -acodec aac -b:a…
XxXxxxx
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batch processing - converting and adding AAC tracks

Is it possible to write a bash script (maybe using something like ffmpeg) to detect if a movie: contains no AAC 5.1 audio track does contain an AC3 (5.1 or higher) audio track and convert the AC3 to AAC, while keeping the AC3 track as-is, and…
xorinzor
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Gstreamer transcoding pipeline 1 source N sinks

hello folks i have a mkv that want to convert to mp4, ogg and webm i tried following pipipeline but got stuck gst-launch-1.0 filesrc location=output.mkv ! matroskademux name=demux demux.video_0 ! jpegparse ! jpegdec ! tee name=vo \ oggmux name=ogg !…
Sebastian Marcet
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Generating MP4 from HLS in gstreamer

I am trying to generate MP4s from HLS streams with discontinuity tags. Since the videos are from the same source the FPS and the WXH are the same. I tested with the following pipeline to demux and play it and it works fine gst-launch-1.0 -v…
Gatothgaj
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ffmpeg rtsp stream to YouTube livestream not doing anything

I'm using C# to initiate ffmpeg. I've a onvif bridge server for a CCTV VMS and I'm building a application to enable the user to livestream any CCTV camera to YouTube. The rtsp stream to the camera looks like…
Felix
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How do you re-transmit a .m3u8 live stream with changed bitrate, fps etc. with ffmpeg?

For instance, I have a 720p/60/4mbps stream, I want to re-stream/re-tranmist it as a 360p/60/1mps stream. Is it possible with ffmpeg?
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What are the benefits of using multi resolution videos in adaptive bitrate streaming?

Why is it recommended to transcode videos with high resolution for high bitrate and low resolution for low bitrate? Why we should not use high video resolution for both high and low bitrates?
Suresh Murali
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What is usage and purpose of Bitrate in AWS Elastic Transcoder Presets

I want to transcode a video using aws elastic transcoder jobs. I have checked video transcoding with preset id "1351620000001-400050" for "Smooth 800k" and this preset having max bitrate 688 Is this mean 688 kbps?? And the input video transcoded…
SST
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Record RTSP stream to file (.wav)

I'm trying to save X seconds from a audio stream to a file. I have a RTSP server, and I made a simple script in python to save several seconds from this server to record in a file (.wav). def main(): ########################### MAIN INIT…
Jaime Menendez Llana
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FFmpeg concat command changes start_time (ts chunks concatenation)

I concatenate ts chunks using ffmpeg command: ffmpeg -i "concat:input1.ts|input2.ts" -c copy output.ts For example video consists of 10 ts chunks, and we concatenate only two last chunks (ninth and tenth ts chunks). And we stream video consisting of…
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