[FFmpeg-user] Error when reading file as stream

Carl Eugen Hoyos ceffmpeg at gmail.com
Mon May 4 15:18:02 EEST 2020

> Am 04.05.2020 um 11:38 schrieb adam smith via ffmpeg-user <ffmpeg-user at ffmpeg.org>:
> When passing the same source to ffmpeg as a stream, through pipe; I am getting errors. This is not for all files, eg mxf files containing DV50, XDCAMHD422 etc have not shown any issue, neither do many mp4 files.
> All files are probed before the transcode and all come back as probe score 100.

Many files, esp. some mov/mp4 files, require seeking. Seeking is impossible if you provide the input through a pipe, this is not a limitation of FFmpeg.

Use qtfaststart to “fix” mov files, so they don’t require seeking anymore.

Carl Eugen

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