[FFmpeg-user] Codec is ignored

[Paul B Mahol]

On 5/13/13, Massimo Battistel <battistel at gmail.com> wrote:
> hi,
> I have to generate 60s of black video with mute audio.
> with the following commad line video track is always mpeg1. The -vcodec
> parameter seems to be ignored.
>
> ffmpeg -f lavfi -i color=c=black:s=720x576 -r 25 -vcodec mpeg2video -f
> lavfi -i aevalsrc=0 -ar 48000 -ac 2 -acodec mp2 -t 60 filler.mpg

-vcodec mpeg2video needs to go somewhere after acodec. (after last -f x -i y)

>
> ffmpeg version N-50442-g4f0d4ac Copyright (c) 2000-2013 the FFmpeg
> developers
>   built on Mar  2 2013 15:33:19 with gcc 4.7.2 (GCC)
>   configuration: --disable-static --enable-shared --enable-gpl
> --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib
> --enable-fontconfig --enable-frei0r --enable-gnutls --enable-libass
> --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm
> --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb
> --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus
> --enable-librtmp --enable-libschroedinger --enable-libsoxr
> --enable-libspeex --enable-libtheora --enable-libtwolame
> --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
> --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid
> --enable-zlib
>   libavutil      52. 17.103 / 52. 17.103
>   libavcodec     54. 92.100 / 54. 92.100
>   libavformat    54. 63.102 / 54. 63.102
>   libavdevice    54.  3.103 / 54.  3.103
>   libavfilter     3. 41.100 /  3. 41.100
>   libswscale      2.  2.100 /  2.  2.100
>   libswresample   0. 17.102 /  0. 17.102
>   libpostproc    52.  2.100 / 52.  2.100
> [lavfi @ 000000000052f7c0] Estimating duration from bitrate, this may be
> inaccurate
> Input #0, lavfi, from 'color=c=black:s=720x576':
>   Duration: N/A, start: 0.000000, bitrate: N/A
>     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 720x576 [SAR
> 1:1 DAR 5:4], 25 tbr, 25 tbn, 25 tbc
> [lavfi @ 000000000052d000] Estimating duration from bitrate, this may be
> inaccurate
> Input #1, lavfi, from 'aevalsrc=0':
>   Duration: N/A, start: 0.000000, bitrate: 2822 kb/s
>     Stream #1:0: Audio: pcm_f64le, 44100 Hz, mono, dbl, 2822 kb/s
> File 'filler.mpg' already exists. Overwrite ? [y/N] VBV buffer size not
> set, muxing may fail
> Output #0, mpeg, to 'filler.mpg':
>   Metadata:
>     encoder         : Lavf54.63.102
>     Stream #0:0: Video: mpeg1video, yuv420p, 720x576 [SAR 1:1 DAR 5:4],
> q=2-31, 200 kb/s, 90k tbn, 25 tbc
>     Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 128 kb/s
> Stream mapping:
>   Stream #0:0 -> #0:0 (rawvideo -> mpeg1video)
>   Stream #1:0 -> #0:1 (pcm_f64le -> mp2)
> Press [q] to stop, [?] for help
> frame=  411 fps=0.0 q=2.0 size=     510kB time=00:00:16.36 bitrate=
> 255.4kbits/s
> frame=  833 fps=833 q=2.0 size=    1038kB time=00:00:33.24 bitrate=
> 255.8kbits/s
> frame= 1259 fps=839 q=2.0 size=    1568kB time=00:00:50.28 bitrate=
> 255.5kbits/s
> frame= 1500 fps=843 q=2.0 Lsize=    1890kB time=00:00:59.98 bitrate=
> 258.1kbits/s
>
> video:933kB audio:938kB subtitle:0 global headers:0kB muxing overhead
> 1.049993%
>
> thanks
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