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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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SAS session encoding LATIN1 failing for unicode characters

My SAS session details are:- ENCODING=LATIN1 LOCALE=EN_US I am reading encrypted customer names, decrypting them using a java code that has been implemented in the sas code using javaobj. data outlib.X1 ( ENCODING = 'asciiany' ); set inlib.INP1…
NVK
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Android video transcoding outputSurface.awaitNewImage timed out occasionally

This problem might look similar to SurfaceTexture's onFrameAvailable() method always called too late but I think it is different. Similarly, the code I am working with is very similar to…
HeyThere
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Videojs - multi bitrate on VOD

Hi I am using AWS elastic transcoder to transcode files to mp4, what I want to achieve is multi-bitrate for VOD. So I will create 3 different renditions and depending on what device or/and connection the user will get the best suited file. All the…
Richard Mc
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FFMPEG command issue

I am having an issue with FFMPEG. To be exact I'm trying to generate a number of 'meaningful' thumbnails from a video file. I have found this command on the internet: ffmpeg -ss 3 -i input.mp4 -vf "select=gt(scene\,0.4)" -frames:v 5 -vsync vfr…
user3521787
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Displaying progress of transcoding using streamio gem

I'm using the Streamio gem for Rails to transcode a video file to .webm format. I'm able to display the progress of the transcoding on the console using: movie.transcode("public/uploads/#{current_user.id}/#{@userfile.name}.webm") { |progress| puts…
Swaathi Kakarla
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How do I convert a G.726 ADPCM signal into a PCM signal?

I usually look to SoX or Window's built in audio libraries for this stuff, but it appears that neither have G.726 codecs. So I have a sequence of bytes that I know are encoded as G.726 although the bit-rate and whether it is mu-law or A-law is not…
Robert Davis
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libfaac: Queue input is backward in time

I am using libav along with libfaac to encode audio into aac. following is the logic: frames[n] i = 0 ; while (there are frames) { cur_frame = frames[i]; av_encode_audio(frame, ...., &frame_finished); if( frame_finished ) { i++; …
Harit Vishwakarma
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convert h.264 live stream to mjpeg live stream

most browsers can directly display a HTTP MJPEG Stream... while they can´t display h.264 via RTSP without the help of plugins... I have a security cam that can only stream h.264 via RTSP so I can´t view the live video on my browser (nor iPhone etc.)…
Yves030
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h264 Licensing, ffmpeg iPhone transcoding

Requirements 1. An application that should run, to begin with, on iPhone, and, in the end on a plurality     of SmartPhone devices. 2. Aim at having the trans-coding code supporting as much OSs as possible. 3. Application is commercial. Use-case …
NadavRub
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What is the correct dimentions for fullscreen video format on the iPhone

I wan't to play video in fullscreen mode on the iPhone, but when I try to figure out how to transcode my videos I get confused about the video format specification from Apple on http://www.apple.com/iphone/specs.html Video formats supported: H.264…
Johan Carlsson
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Seeking video while transcoding with ffmpeg

I'm building an application that records live tv (dvbt: mpeg.ts-files) and immediately transcodes it with ffmpeg to a webm file. I'm able to do that at a constant rate; so ffmpeg doesnt catch up the growing file. Now I want to playback this file on…
Erik
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How to salvage a gigantic, possibly corrupt, AIFF file?

Due to a Sound Track Pro glitch, I have a problematic AIF file. It plays fine in QuickTime Player, and is about 1 hour 50 mins long. However: It's 3.81GB in size, whereas (I believe) AIF files are only supposed to be 2GB or smaller. iTunes…
Ross Duncan
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ffmpeg with Quick Sync Video (qsv) gets stuck

I've compiled ffmpeg in an Arch Linux distribution with support to Intel Quick Sync Video. But ffmpeg gets stuck when I try to run it: $ ffmpeg -debug -hwaccel qsv -qsv_device /dev/dri/renderD128 -c:v h264_qsv -i test_video.mp4 -c:v hevc_qsv…
Juliano B. Nequirito
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VLC RTSP HTML5 transcoding

I'm trying to get audio streaming on an HTML page from an RTSP server. The RTSP server is the rtsp-simple-server running a command line below. ./rtsp-simple-server rtsp-simple-server.yml. The configure file is the default. The stream player is…
Pierogi
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Programmatically embedding picture in video

I'm trying to figure out the best method to programmatically embed a logo onto videos uploaded from users before they are sent to a youtube channel. I'd like to do this with minimal artifacts added. The files will be uploaded to a server where I'll…
Parrots
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