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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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How to use ffmpeg to upscale video resolution with libplacebo?

In Vapoursynth, it is convenient to download and use plugins to change the frame rate of videos. However, it seems that using FFmpeg has more limitations (or maybe I haven't found the right method). Anime4K is a video enhancement algorithm suitable…
Ironbox
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Converting a voice recording into an mp3

For a vue.js messaging project, I'm using the wavesurfer.js library to record voice messages. However Google chrome gives me an audio/webm blob and Safari gives me an audio/mp4 blob. I'm trying to find a solution to transcode the blob into…
Raphael M
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FFmpeg transcoding video H.264 -> AV1 leads to distorted image

I'm reading video from stdin via pipe similar to this one Python gets stuck at pipe.stdin.write(image.tostring()) FFmpeg is using libsvtav1 codec with options according to documentation ffmpeg -y -f rawvideo -i pipe:0 -s {frame_width}x{frame_height}…
user1584149
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ffmpeg/libav skips frames in case of network disconnection

I have remote m3u8 playlist with ts files. I'm trying to read it with av_read_frame. For some reason, in case of quick reconnection to the network (I used sudo ifconfig myInterface down && sudo ifconfig myInterface up) I have missed frames: it skips…
naufumi
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libav audio transcoding producing noise

I am trying to transcode any input audio file to AAC codec (having mp4 output container). For this,I took input file as media.mp4(having opus codec). The trans coding worked but the noise is superficially attached to the stream of output file.…
Ram Prasad Poudel
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How can I synchronize audio and video in real-time transcoding using ffmpeg API?

I was using ffmpeg api for realtime tanscoding, but somethimes when the system resources (memory) become limited , audio and video is out of syn, as i was tanscoding and pushing rtmp stream so it involves both decoding and and encoding , do i need…
qwer
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Is x-Protostream encoding supported in Keycloak version 21.x

I have setup Keyclock v21.x on Kubernetes along with Infinispan v14.x. In Infinispan, I have created distributed caches named sessions, offlineSessions, offlineClientSessions, actionTokens,loginFailures, authenticationSessions, clientSessions and…
Neelesh Gurjar
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SSIS optimizing "value decoding" on ETL data flow

I'm developing a series of ETL procedures for a migration project using SSIS/DataTool 2010. I have multiple cases where I have to decode source values with new target ones, i.e in Customers addresses I have the states with "full names" and I have to…
gigaale
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where can one find old patches/curated versions of ffmpeg for qsv (mpeg2_qsv)?

for the past year or so the mpeg2_qsv encoder in ffmpeg/libmfx has been broken due to a idr interval problem (sends only one idr frame at the start of the video rather than sending idr frames at a certain interval) i have found a solution/workaround…
CodeCalf
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video encoding and decoding performance compare in linux and windows

I wrote a simple gstreamer pipeline to decode and re-encode h.265 to h.264: avdec_h265 | x264enc. On the same hardware, I found the cpu usage is much less in windows compared to linux. Any idea why windows transcoding is much faster in linux (Oracle…
zigzag
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VLC commandline options : Bluray ripping / transcoding / selecting Element Stream (ES)

I want to select a specifc audiotrack from an Bluray Disc to be put in an mkv, and only this one and not the default one (English) or non. So what did I try: --audio-track --audio-track-id several commandline options in win and linux, no succes: vlc…
DB5FP
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gRPC JSON transcoding : using repeated fields in query parameters

I'm trying to make a request via Swagger using JSON transcoding, but I'm encountering an error when I use a repeated field parameter in my request. The error message I'm receiving is: response I've attached my code snippet below for reference. Can…
Carlos Alberto Medina Hdez
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FFmpeg - Low/unstable encoding speed

Trying to transcode two streams into one gives me poor/unstable encoding speeds from x0.400 to x0.988, sometimes above x1. fmpeg \ -thread_queue_size 15 -rtbufsize 100M -i "https://.../stream.m3u8" \ -thread_queue_size 15 -rtbufsize 100M -i…
Erwan
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MOOV atom not found in MOV in 5 of 9 files from the same camera

I have 9 files: FHD001.MOV to FHD009.MOV. They come from 3 recordings: FHD001, FHD002-FHD007 and FHD008-FHD009. Apart from FHD001 and FHD007 all are about 2.3GB each. With ffmpeg I can transcode FHD002-FDD004 without problems. The other file give a…
dnz
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encode video using ffmpeg start at frame

I use ffmpeg -i my_video.mp4 -vf scale=1024:-1 my_video.avi to encode/transcode a video. Now i would like to do the same thing but start at frame X. How can I do that?
larry
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