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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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What is the cause of these google beta transcoding service job validation errors

"failureReason": "Job validation failed: Request field config is invalid, expected an estimated total output size of at most 400 GB (current value is 1194622697155 bytes).", The actual input file was only 8 seconds long. It was created using the…
Christopher Oliver
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file upload with HTTP/JSON to gRPC Transcoding

in this page it is described how to automatically support REST requests in an existing GRPC server https://cloud.google.com/endpoints/docs/grpc/transcoding But there is no mention for file upload support . For example is it possible to support…
demi
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FFMPEG - how to transcode input stream while cutting off first few seconds of video and audio

I am using ffmpeg to transcode a screen-record (x11) input stream to MP4. I would like to cut off the first ~10 seconds of the stream, which is just a blank screen (this is intentional). I understand how to trim video with ffmpeg when converting…
purplepear24
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convert mp4 to hls but with variable segments size

I saw several examples to change mp4 container to hls using ffmpeg easily with something like this: ffmpeg -i input.mp4 -profile:v baseline -level 3.0 -s 640x360 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls index.m3u8 I observed that…
Pavel Angel Mendoza Villafane
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VLCJ Error when Transcoding RTSP to HTTP OGG Format

I am working on a solution to display IP camera in a HTML component in my react app. I am transcoding the live RTSP video feed using VLC to OGG and my app can successfully find and display the video. I use this stream output string in VLC to do…
macmeyers50
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FFMPEG encode_audio.c crashes with g722 encoder

get the encode_audio.c example from ffmpeg, which converts in-memory raw PCM data to MP2 compile gcc -o encode_audio encode_audio.c -I/usr/include/x86_64-linux-gnu/libavcodec -lavformat -lavcodec -lavutil -lm check that is works with the MP2…
oli21270
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Android MediaCodec asynchronous decode / encode latency depends on frame timing

We've built an async MediaCodec transcoder that uses a surface generated from a MediaCodec decoder using the newer API 21+ async callbacks (onInputBufferAvailable and onOutputBufferAvailable). It's fully functional, but we've noticed that the…
Dustin Kerstein
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Calling all transcoding experts! I could use some advice on format options

I need to pick the formats for an upcoming sport video portal. Since we are about to transcode a huge stack of videos, this decision is somewhat crucial. I can choose from FLV (VP6), M4V (H.264), OGV (Theora), WEBM (VP8) and any combination of…
thomas
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How to stream and transcode media files using java (on Tomcat)?

This has been discussed before here. Using Java, I have developed my web services on Tomcat for a media library. I want to add a functionality for streaming media while dynamically transcoding them as appropriate to mobile clients. There are few…
zombie
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Is it possible to transcode various of videos to H.264 as almost the same quality using FFmpeg?

I have various of videos captured from various of resources but using different video/audio codec, bitrate and resolution. Here's some example : video: WMV3, bitrate: 6Mbps, audio: WMA, format: WMV video: H.263, bitrate: 30Mbps, audio: MP3,…
BH4EHN
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AWS Lambda code to convert MP3 input for Lex

I have a solution that will reside on a user’s local mobile device, I want this to post audio content to Lex using the AWS REST API. The problem is that the solution can’t stream audio (up or down) and has almost no audio manipulation capabilities…
Matt Haughton
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GStreamer transrating / transcoding to multiple Outputs

is it possible to transrate / transcode a RTMP or RTP Stream with GStreamer to multiple output streams? For example: Input: RTP h264 Stream with 1500 kbits Outputs: - RTP h.264 Stream with 1500 kbits - RTP h.264 Stream with 1000 kbits - RTP h.264…
funkdoobiest
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How to make video playback faster?

I have system in which video is being uploaded from admin panel.Video is of high quality HD. So when video played on browser on mobile device its playback is very slow & takes lot of time to play. In order to make It fast playback someone suggests…
TechChain
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ffmpeg dash Segment offset

I'm trying to integrate live-transcoding like "plex" or "emby" with my application. I am able to serve dash content over to shaka-player or dash.js but only in 'live-mode'. But I want to enable seeking through the player. I looked at plex and to…
inkubux
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Could not get audio( libopus ) stream from ffserver via rtp

I need to get the rtp stream with the next codecs vp8,opus. I get a stream from a camera (h264, aac), then I send to ffmpeg,then I send it to the ffserver and from there I want to receive a stream in the format rtp. Video (VP8) without audio i…
Kirill K
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