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• vulkan_decode : use the correct queue family for decoding ops

  14 août 2024, par Lynne

  vulkan_decode : use the correct queue family for decoding ops
  In 680d969a305c0927480573a1b455024088b51aeb, the new API was
  
  used to find a queue family for dispatch, but the found queue
  
  family was not used for decoding, just for dispatching.
  

  • [DH] libavcodec/vulkan_decode.c

• Remove audio from specific audio track

  9 août 2024, par Ronaldo Júdice

  I have this code, and i would like to remove audio from tracks 5 and 6. I had tried everything but is not working, I can mute the audio tracks but on edition program i can see the waves, can you help me ?

  


  if (conv.format === 'mxf') {
        // Add 8 audio tracks
        ffmpeg(inputFile)
            .audioCodec('pcm_s16le') // Codec de áudio para MXF
            .outputOptions([
                '-c:v mpeg2video', // Codec de vídeo para MXF
                '-q:v 2', // Qa  vídeo
                '-map 0:v:0', 
                '-map 0:a:0', 
                '-map 0:a:0',
                '-map 0:a:0', 
                '-map 0:a:0', 
                '-map 0:a:0', // this track i want to remove the audio but keep the track
                '-map 0:a:0', //this track i want to remove the audio but keep the track
                '-map 0:a:0', 
                '-map 0:a:0', 
                '-disposition:a:0 default' // Marcar trilha 1 como padrão
            ])
            .save(outputFile)
            .on('start', commandLine => console.log(`FFmpeg comando iniciado: ${commandLine}`))
            .on('progress', progress => console.log(`Progresso: ${progress.percent}%`))
            .on('end', () => console.log(`Conversão concluída: ${outputFile}`))
            .on('error', err => console.error(`Erro na conversão de ${inputFile} para ${outputFile}: ${err.message}`));
    } else {
        // Outras conversões
        ffmpeg(inputFile)
            .outputOptions(conv.options)
            .save(outputFile)
            .on('start', commandLine => console.log(`FFmpeg comando iniciado: ${commandLine}`))
            .on('progress', progress => console.log(`Progresso: ${progress.percent}%`))
            .on('end', () => console.log(`Conversão concluída: ${outputFile}`))
            .on('error', err => console.error(`Erro na conversão de ${inputFile} para ${outputFile}: ${err.message}`));
    }


  


  I tried to use ffmpeg comands to remove audio from track.

  


• FFMPEG 1080p50 to 1080p25 bad channel logo [on hold]

  16 mars 2018, par Sambir

  I try to run ffmpeg and gpu encoding. The input stream is 1080p50 (which is 1080i50 to 1080p25 and then to p50 again). I want to transcode this @ 1080p25 but the output is not really smooth. The corners of the channel logo are not smooth and when small letters goes across the screen they are not smooth aswell.

  But when transcode @ 1080p50 then all is fine. But you can see the logo shaking. Its like running @ 720p50.

  Is there a way i can make the logo look smooth @ 1080p25 ? I tried using vf yadif and it helped a bit but the logo is a bit blurry now.

  With gpu deinterlacing it’s worse.

  This is my current command line

  ffmpeg.exe -vcodec h264_cuvid -i rtmp://192.168.2.3:8001/input/channel -map 0:0 -map 0:1 -vf yadif=1 -acodec libfdk_aac -b:a 96k -c:v h264_nvenc -gpu 0 -preset llhq -vprofile high -rc:v vbr -qmin:v 26 -qmax:v 32 -b:v 4M -maxrate 4M -bufsize 8M -threads 0 -r 25 -g 100 -f flv rtmp://192.168.2.3:8001/input/test10.stream