[FFmpeg-user] Sync. Issue. Video Gradually Falls Behind

[Carl Eugen Hoyos]

Am Di., 26. Jan. 2021 um 16:51 Uhr schrieb Thomas Seilund via
ffmpeg-user <ffmpeg-user at ffmpeg.org>:

> Input #0, h264, from 'pipe:':
>    Duration: N/A, bitrate: N/A
>      Stream #0:0: Video: h264 (High), yuv420p(progressive), 1280x720, 25
> fps, 25 tbr, 1200k tbn, 50 tbc
> Guessed Channel Layout for Input Stream #1.0 : stereo
> Input #1, pulse, from
> 'alsa_input.usb-046d_HD_Pro_Webcam_C920_9D715A9F-02.analog-stereo':
>    Duration: N/A, start: 1611673439.592751, bitrate: 1536 kb/s
>      Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
> Guessed Channel Layout for Input Stream #2.0 : stereo
> Input #2, pulse, from
> 'alsa_output.platform-bcm2835_audio.analog-stereo.monitor':
>    Duration: N/A, start: 1611673439.612473, bitrate: 1536 kb/s
>      Stream #2:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s

I don't think you can synchronize a stream with no start time with
two streams with start time, at least not without additional options.

Carl Eugen