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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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Simple examples of a webpage serving video to mobile?

I've been trying to get some straightforward example of a page with a few video types on it that work in iPhone android winmo and blackberry. I spent a lot of time transcoding today but outside of iPhone I just keep hitting obstacles. Anyone know…
Quotient
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ffmpeg concat with video using image background

Ffmpeg does not concat the media files correctly using various testing. One of the videos is a .mp4 (h264 codec) video generated previously using a .mp3 and a jpeg background. I've tried testing with various flags, closest I've gotten is below for…
ant-C
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Set minimal ts duration in ffmpeg command

We are using ffmpeg to convert mp4 video file to hls. When video is converted, it sometimes happens that last ts chunk is about 0.03s. And player stalls on this chunk for a while. Is there a special command in ffmpeg to set minimal ts duration? Or…
Ales
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Video transcoding during stream

I am trying to setup a testbed that will be used for experimentation, and I have deployed some VMs over Openstack and the setup looks like this currently: The far right machine is running Apache2 server and video is hosted in /var/www/html/videos…
Wajahat
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ffmpeg transcoding process stops after 15min

im starting 2 ffmpeg transcoding processes on a raspberry pi (raspbian) when booting. After around 15 min, both processes stops. I have tried with delay etc. in startup script, also start it with both root and normal user privileges. Same result…
p3tter
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After transcoding using ffmpeg, I found audio bitrate is not the value I expected

I used ffmpeg to transcode some files into new format and with certain parameters. After transcoding, I found some output file's metadata is not what I expected, the output value is not the same with I set in the cmd line. Before transcoding I check…
penny
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ffmpeg radio live transcoding mp3/aac to g722

I have tried to transcode a radio stream with ffmpeg to g722. I get the stream to work and im able to listen to the stream. The problem is that the output stream have faster speed than the input stream. so the result is not good. I have tried to…
p3tter
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Why Xsd Cannot Load a Transcoding Service?

I am using CodeSynthesis XSD (XML Data Binding Tool for C++) to auto-generate .hpp and .cpp files from a .xsd file. But when running xsd over my .xsd file, I am getting this error: Could not load a transcoding service I am using openSUSE Leap-42.2,…
TonySalimi
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Fffmpeg mapping audio and video by language

I want to batch convert these mkv files, they contain more than one language. Instances include: Eng/Ger, Eng/JPN. Sometimes there are multiple video sources within the mkv for whatever reason: ive tried using: FFMPEG_PATH . ' -i ' . $localFile . '…
Terrabyte
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Converting WAV to GSM using pysox

I'm experimenting with pysox and trying to simply convert a WAV file to GSM. I'm currently using the following approach which works just fine: infile = pysox.CSoxStream("input_file.wav") outfile =…
user7412510
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Using NAudio, ADTS AAC to WAV Transcoding, how to?

I am attempting to implement the following code which I found here using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Media; using NAudio.Wave; namespace AAC2WAV { class Program { …
Majickal
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raspberry pi 3 OpenMax EmptyThisBuffer slow response when transcoding with libav or ffmpeg

The context is transcoding on a Raspberry Pi 3 from 1080i MPEG2 TS to 1080p@30fps H264 MP4 using libav avconv or ffmpeg. Both are using almost idenitical omx.c source file and share the same result. The performance is short of 30fps (about 22fps)…
A. H.
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Live Transcoding & Streaming

My client has a requirement where he needs me to transcode a source file into a proxy with a unique burn in on it per playback. For the proxy I will be using ffmpeg, nothing fancy, but ideally the users can play back the file as it is being…
okrunner
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Does ffmpeg support drop and non-drop frames?

I am implementing a simple video player using ffmpeg. After so much of googling, I couldn't find ans for my question. Here it is: Does ffmpeg supports drop and non-drop timecodes. If yes, Can anyone help me in enabling it? Thanks in advance.
Raju
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How to transcode EUC-JP to Unicode in a way that can be displayed to the user?

Hello I'm building a simple app for android which allows the user to look up a kanji and see its "parts". To do that I'm reading from a data file which I found on this website and contains the parts of kanji I need to display. The problem is that…
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