[FFmpeg-user] FLV(Speex + H.264) --> MP4(AAC + H.264) Converstion

Leo Papadopoulos leo at telecomcto.com
Thu Dec 20 16:09:31 CET 2012 

Bat:

Worked, I can finally see video now on both my iPad and Andriod. I am
streaming this from Wowza using html video tags. (<video controls src="
http://10.1.1.3:1935/vod/telecomctotest.mp4/playlist.m3u8" height="135"
width="240"> </video>)
One final problem is that the audio is about 1 full second delayed with
respect to the video. I used the command you suggested and I will try
playing around with it to see if that helps. Here is the command:
ffmpeg -i telecomcto.flv -c:v copy -c:a aac -strict -2 -b:a 64k -ar 44100
-ac 1 telecomctotest.mp4

FYI. I also tried the -itsoffset flag and that does not seem to do anything.

It did give me some warnings about invalid clipping so the full output is
below:
ffmpeg -i telecomcto.flv -c:v copy -c:a aac -strict -2 -b:a 64k -ar 44100
-ac 1 telecomctotest.mp4
ffmpeg version N-47994-ga1d1433 Copyright (c) 2000-2012 the FFmpeg
developers
  built on Dec 19 2012 15:40:59 with gcc 4.1.2 (GCC) 20080704 (Red Hat
4.1.2-52)
  configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis
--enable-libvpx --enable-libx264 --enable-libspeex
  libavutil      52. 12.100 / 52. 12.100
  libavcodec     54. 80.100 / 54. 80.100
  libavformat    54. 49.102 / 54. 49.102
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 28.102 /  3. 28.102
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, flv, from 'telecomcto.flv':
  Metadata:
    creationdate    : Wed Dec 19 10:49:09
  Duration: 00:00:12.33, start: 0.000000, bitrate: 673 kb/s
    Stream #0:0: Video: h264 (Baseline), yuv420p, 640x480 [SAR 1:1 DAR
4:3], 30 tbr, 1k tbn, 60 tbc
    Stream #0:1: Audio: speex, 16000 Hz, mono, s16
File 'telecomctotest.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'telecomctotest.mp4':
  Metadata:
    creationdate    : Wed Dec 19 10:49:09
    encoder         : Lavf54.49.102
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x480
[SAR 1:1 DAR 4:3], q=2-31, 16k tbn, 1k tbc
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp,
64 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (libspeex -> aac)
Press [q] to stop, [?] for help
[mp4 @ 0x1986fa0] st:0 PTS: 16176 DTS: 16176 < 16177 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 21568 DTS: 21568 < 21569 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 31040 DTS: 31040 < 31041 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 47072 DTS: 47072 < 47073 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 47072 DTS: 47072 < 47074 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 54416 DTS: 54416 < 54417 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 57632 DTS: 57632 < 57633 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 60032 DTS: 60032 < 60033 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 62128 DTS: 62128 < 62129 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 62128 DTS: 62128 < 62130 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 66368 DTS: 66368 < 66369 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 70432 DTS: 70432 < 70433 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 73856 DTS: 73856 < 73857 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 75856 DTS: 75856 < 75857 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 77872 DTS: 77872 < 77873 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 77872 DTS: 77872 < 77874 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 80016 DTS: 80016 < 80017 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 84272 DTS: 84272 < 84273 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 88816 DTS: 88816 < 88817 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 92896 DTS: 92896 < 92897 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 94976 DTS: 94976 < 94977 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 94976 DTS: 94976 < 94978 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 99376 DTS: 99376 < 99377 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 103456 DTS: 103456 < 103457 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 108944 DTS: 108944 < 108945 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 111280 DTS: 111280 < 111281 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 117552 DTS: 117552 < 117553 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 119600 DTS: 119600 < 119601 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 127072 DTS: 127072 < 127073 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 127072 DTS: 127072 < 127074 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 134528 DTS: 134528 < 134529 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 139824 DTS: 139824 < 139825 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 143184 DTS: 143184 < 143185 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 143184 DTS: 143184 < 143186 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 158736 DTS: 158736 < 158737 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 164480 DTS: 164480 < 164481 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 167360 DTS: 167360 < 167361 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 170784 DTS: 170784 < 170785 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 173856 DTS: 173856 < 173857 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 173856 DTS: 173856 < 173858 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 179488 DTS: 179488 < 179489 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 182576 DTS: 182576 < 182577 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 188944 DTS: 188944 < 188945 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 190976 DTS: 190976 < 190977 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 193088 DTS: 193088 < 193089 invalid, clipping
[mp4 @ 0x1986fa0] st:0 PTS: 197344 DTS: 197344 < 197345 invalid, clipping
frame=  184 fps=0.0 q=-1.0 Lsize=    1036kB time=00:00:12.46 bitrate=
680.4kbits/s
video:935kB audio:92kB subtitle:0 global headers:0kB muxing overhead
0.834750%



On Wed, Dec 19, 2012 at 5:53 PM, bat guano <batguano999 at hotmail.com> wrote:

>
>
>
>
> > I got this error: The encoder 'aac' is experimental but experimental
> codecs
> > are not enabled, add '-strict -2' if you want to use it.
> >
> > So I ran this command: ffmpeg -i telecomcto.flv -c:v copy -c:a aac
> -strict
> > -2 telecomctotest.mp4
> > Then I got this error: Error while opening encoder for output stream
> #0:1 -
> > maybe incorrect parameters such as bit_rate, rate, width or height
> >
> > Any further ideas?
> >
> Hi
> Put in some parameters for the aac codec.
> For example:
> ffmpeg -i telecomcto.flv -c:v copy -c:a aac -strict -2 -b:a 64k -ar 44100
> -ac 1 telecomctotest.mp4
>
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
>


-- 
_________________________________________
Leo Papadopoulos (leo at telecomcto.com)
TelecomCTO, LLC <http://telecomcto.com>
Virtual Number: +1(203)539-0448
Linkedin <https://www.linkedin.com/in/leopapadopoulos> -
Twitter<https://twitter.com/LeoP_TCTO>

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