[FFmpeg-user] HLS conversion fails with "Cannot use rename on non file protocol..." error

[Dennis Mungai]

On Sat, 19 Oct 2019 at 20:21, Hoggins! <hoggins at radiom.fr> wrote:
>
> Hello there,
>
> First post on this list.
> I'm trying to convert a file to HLS without reencoding, and I'm stuck
> with an error I quite don't understand. Here's my command:
>
>     ffmpeg -i rockinspace-okoyome.mp4 -c:v copy -flags +cgop -g 50
>     -hls_time 1 -hls_playlist_type vod rockinspace-okoyome.m3u8
>
>
> So it starts normally and creates a bunch of .ts files as expected, but
> at file no 1764, it stops with an error I cannot relate to:
>
>     [hls @ 0x55657b07ec00] Opening 'rockinspace-okoyome1761.ts' for writing
>     [hls @ 0x55657b07ec00] Opening 'rockinspace-okoyome1762.ts' for writing
>     [hls @ 0x55657b07ec00] Opening 'rockinspace-okoyome1763.ts' for writing
>     [hls @ 0x55657b07ec00] Opening 'rockinspace-okoyome1764.ts' for writing
>     [hls @ 0x55657b07ec00] Cannot use rename on non file protocol, this
>     may lead to races and temporary partial files
>     frame=69230 fps=436 q=-1.0 Lsize=N/A time=00:46:07.60 bitrate=N/A
>     speed=17.4x
>     video:1352238kB audio:42374kB subtitle:0kB other streams:0kB global
>     headers:0kB muxing overhead: unknown
>     [aac @ 0x55657b19b280] Qavg: 174.694
>
>
> Source and destination files are on a local filesystem, so I quite don't
> understand why I would get this error. But considering it always happens
> at this particular file, I'm guessing there might be something odd with
> the source file. But what?
> Source file is available here if you have a chance to test it:
> https://radiom.fr/media-rockinspace-okoyome.mp4
>
> Note that the same thing happens with another file but on another segment:
>
>     [hls @ 0x557732d14140] Opening 'rockinspace-enola2178.ts' for writing
>     [hls @ 0x557732d14140] Opening 'rockinspace-enola2179.ts' for
>     writingd=15.4x
>     [hls @ 0x557732d14140] Opening 'rockinspace-enola2180.ts' for writing
>     [hls @ 0x557732d14140] Opening 'rockinspace-enola2181.ts' for writing
>     [hls @ 0x557732d14140] Cannot use rename on non file protocol, this
>     may lead to races and temporary partial files
>     frame=64024 fps=385 q=-1.0 Lsize=N/A time=00:43:03.63 bitrate=N/A
>     speed=15.5x
>     video:1250493kB audio:40609kB subtitle:0kB other streams:0kB global
>     headers:0kB muxing overhead: unknown
>     [aac @ 0x55772e883cc0] Qavg: 161.026
>
>
> (source file is https://radiom.fr/media-rockinspace-enola.mp4)
>
> Also note that I was previously using the following command, but I quit
> because it resulted in audio and video being out of sync: ffmpeg -i
> rockinspace-okoyome.mp4 -c:v -c:v libx264 -crf 17 -preset slow -flags
> +cgop -g 50 -hls_time 1 -hls_playlist_type vod rockinspace-okoyome.m3u8
>
> Any idea? Should I try to reencode the source file to "normalize" it?
>
>     Thanks!
>
>         Hoggins!

Hello Hoggins,

Please post the full console output from FFmpeg, such that we can see
the build version, etc.
On my end, using the latest ffmpeg git tip, I'm able to run your
command with no issues whatsoever.

Note that only git tip is supported here.