[FFmpeg-user] Adding Subtitles Problem...

[Moritz Barsnick]

Hi Mike,

On Mon, Jun 17, 2013 at 16:51:52 +0100, Mike Kavanagh wrote:
> The source video does not contain any subtitles, as I am expecting them to
> be feed in afresh from the srt file - am I right in thinking an srt file can
> be created as an ascii file? 

Your files are being identified correctly, incl. your manually crafted
SRT file, but ffmpeg sees subtitles in the MP4 input file and passes
them on to the output file, ignoring your SRT file. Looking at your
log:

First file (MP4), incl. subtitle stream:

  Duration: 00:00:05.00, start: 0.000000, bitrate: 613 kb/s
    Stream #0:0(und), 1, 1/16384: Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1340x886, 611 kb/s, 1 fps, 1 tbr, 16384 tbn, 2 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und), 0, 1/1000: Subtitle: mov_text (tx3g / 0x67337874)
    Metadata:
      handler_name    : SubtitleHandler

Second file (SRT):

Input #1, srt, from 'test.srt':
  Duration: N/A, bitrate: N/A
    Stream #1:0, 0, 1/1000: Subtitle: subrip

But here's the output mapping:

Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (mov_text -> mov_text)

See, ffmpeg is taking 0:1 as subtitle input, not 1:0. You should be
adding map options:

-map 0:0 -map 1:0

which would/should result in something like this:

Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #1:0 -> #0:1 (subrip -> mov_text)

Moritz