[FFmpeg-trac] #1778(undetermined:reopened): EIA-608 / EIA-708 Closed Captions disappear when transcoding/reencoding
FFmpeg
trac at avcodec.org
Fri Jul 31 21:36:31 CEST 2015
#1778: EIA-608 / EIA-708 Closed Captions disappear when transcoding/reencoding
-------------------------------------+-------------------------------------
Reporter: mikecheat04 | Owner:
Type: enhancement | er.anshul.maheshwari@…
Priority: wish | Status: reopened
Version: git-master | Component:
Keywords: cc | undetermined
Blocking: | Resolution:
Analyzed by developer: 0 | Blocked By:
| Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by cjplay93):
I'm not sure if this should constitute a new ticket, but the "lavfi"
method in the revision doesn't work exactly right on a FinalCut-Captioned
MOV file. FFMPEG didn't extract anything regardless of seeing the input
track. Sample MOV available, but is 4.8GB and only 5mins long.
{{{
ffmpeg.exe -f lavfi -i
"movie=OPEN_HOUSE_5275_WITH_CC_5mins.mov[out0+subcc]"
-map s "OPEN_HOUSE_5275_WITH_CC_5mins.mov.srt"
ffmpeg version N-73002-gf6c3f1e Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 4.9.2 (GCC)
configuration: --arch=x86_64 --target-os=mingw32 --cross-
prefix=/mnt/st2/ffmpe
g_macosx/sandbox/mingw-w64-x86_64/bin/x86_64-w64-mingw32- --pkg-config
=pkg-confi
g --enable-gpl --disable-decoder=jpeg2000 --enable-libsoxr --enable-
fontconfig -
-enable-libass --enable-libutvideo --enable-libbluray --enable-iconv
--enable-li
btwolame --extra-cflags=-DLIBTWOLAME_STATIC --enable-libzvbi --enable-
libcaca --
enable-libmodplug --extra-libs=-lstdc++ --extra-libs=-lpng --enable-
libvidstab -
-enable-libx265 --enable-decklink --extra-libs=-loleaut32 --enable-libx264
--ena
ble-libxvid --enable-libmp3lame --enable-version3 --enable-zlib --enable-
librtmp
--enable-libvorbis --enable-libtheora --enable-libspeex --enable-
libopenjpeg --
enable-gnutls --enable-libgsm --enable-libfreetype --enable-libopus
--disable-w3
2threads --enable-frei0r --enable-filter=frei0r --enable-libvo-aacenc
--enable-b
zlib --enable-libxavs --enable-libopencore-amrnb --enable-libopencore-
amrwb --en
able-libvo-amrwbenc --enable-libschroedinger --enable-libvpx --enable-
libilbc --
enable-libwavpack --enable-libwebp --enable-libgme --enable-dxva2
--enable-libdc
adec --enable-avisynth --enable-libmfx --enable-static --disable-shared
--extra-
cflags=
--prefix=/mnt/st2/ffmpeg_macosx/sandbox/mingw-w64-x86_64/x86_64-w64-ming
w32 --extra-libs=-lpsapi --enable-nonfree --enable-libfdk-aac --disable-
libfaac
--enable-nvenc --enable-runtime-cpudetect
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 37.100 / 56. 37.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 17.100 / 5. 17.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
libpostproc 53. 3.100 / 53. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004183a0] Could not find codec
parameters for
stream 3 (Subtitle: none (c708 / 0x38303763), 1920x1080, 23 kb/s):
unknown code
c
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
Input #0, lavfi, from
'movie=OPEN_HOUSE_5275_WITH_CC_5mins.mov[out0+subcc]':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (Y3[10][10] / 0xA0A3359), yuv422p10le,
1920x108
0 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc
Stream #0:1: Subtitle: eia_608
File 'OPEN_HOUSE_5275_WITH_CC_5mins.mov.srt' already exists. Overwrite ?
[y/N] y
Output #0, srt, to 'OPEN_HOUSE_5275_WITH_CC_5mins.mov.srt':
Metadata:
encoder : Lavf56.37.100
Stream #0:0: Subtitle: subrip (srt)
Metadata:
encoder : Lavc56.41.100 srt
Stream mapping:
Stream #0:1 -> #0:0 (eia_608 (cc_dec) -> subrip (srt))
Press [q] to stop, [?] for help
size= 0kB time=00:00:00.00 bitrate=N/A
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing ove
rhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames
parameters i
f used)
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/1778#comment:11>
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