[FFmpeg-user] Specifying Video Stream with V instead of v

Moritz Barsnick barsnick at gmx.net
Wed Nov 11 14:48:23 CET 2015

On Tue, Nov 10, 2015 at 12:58:34 -0700, Josh Marell wrote:
> I did make a decision to submit a bug report (
> https://trac.ffmpeg.org/ticket/5001). I looked at the ticket system
> and it seems sometimes reports can go quite a while before they get
> any attention, so I'm not sure I'll hold my breath on that resolution
> in the short term.

Sure, developers do all this in their spare time. And if it's not an
enormously important bug (their are likely more important ones!), it
might not get prioritized.

> https://www.dropbox.com/s/td2ac0obm0cxvtc/BigBa906%20-%20The%20Helium%20Insufficiency.mkv?dl=0
> It is about 740MB, if you can provide instruction of how to cut a part of
> it that would provide what you need I'm happy to do so, otherwise the full
> file is available there for you.

mkvtoolnix and the mkv tools can probably do that. If it's okay for
ffmpeg to remux, you can do:
$ ffmpeg -i "BigBa906 - The Helium Insufficiency.mkv" -map 0 -c copy -t 5 "BigBa906 - The Helium Insufficiency.short.mkv"

If the resulting file still exposes the original issue for you, please
present the short one. Too late for this one. BUT that said:

You originally wrote:

> Stream mapping:
>   Stream #0:0 -> #0:0 (copy)
>   Stream #0:1 -> #0:1 (h264 (native) -> hevc (libx265))
>   Stream #0:2 -> #0:2 (copy)
>   Stream #0:3 -> #0:3 (mjpeg (native) -> hevc (libx265))
>   Stream #0:4 -> #0:4 (mjpeg (native) -> hevc (libx265))
>   Stream #0:5 -> #0:5 (mjpeg (native) -> hevc (libx265))
>   Stream #0:6 -> #0:6 (mjpeg (native) -> hevc (libx265))

But this file shows me:
Input #0, matroska,webm, from 'BigBa906 - The Helium Insufficiency.mkv':
    encoder         : libebml v1.3.1 + libmatroska v1.4.2
    creation_time   : 2015-10-29 01:22:49
  Duration: 00:19:07.57, start: 0.000000, bitrate: 2815 kb/s
    Stream #0:0(eng): Video: h264 (High), yuv420p(tv, bt709), 1916x1076 [SAR 1:1 DAR 479:269], 23.98 fps, 23.98 tbr, 1k tbn, 2k tbc (default)
    Stream #0:1(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Stream #0:2(eng): Subtitle: subrip

so I have no idea how to reproduce the issue of still images getting
converted instead of copied. (I don't want to construct my own input
file, at the risk of the format being slightly different.)


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