[FFmpeg-user] Convert .256 to avi with audio

[André Luís Duarte]

Hi Guys. Thanks for the feedback. Steve, I initially tried the following command, and the result was as follows:

linux at linux-Capella-IbexPeak-M-Chipset:~/Vídeos$ sudo ffmpeg -i Video1.264 -vcodec copy Video1.avi
ffmpeg version N-73895-g323ec6b Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
libavutil      54. 28.100 / 54. 28.100
libavcodec     56. 50.101 / 56. 50.101
libavformat    56. 40.101 / 56. 40.101
libavdevice    56.  4.100 / 56.  4.100
libavfilter     5. 25.100 /  5. 25.100
libavresample   2.  1.  0 /  2.  1.  0
libswscale      3.  1.101 /  3.  1.101
libswresample   1.  2.101 /  1.  2.101
libpostproc    53.  3.100 / 53.  3.100
Video1.264: Invalid data found when processing input

"I ran the command after giving full permission to access the file. (chmod 777 Video1.264)"

After searching the internet, I saw a post suggesting use -f to force ffmpeg h264 treat Video1.264 file in h264 format. As I understand the error in the first command it was that ffmpeg could not identify the file type. Once put -f H264 format was identified. I did not know that the h264 format does not have audio.

Moritz, if I do not put -f H264, in the example I posted without the -f option h264 in the end we can see that ffmpeg could not identify the file format.

I tried to check the audio as you suggested to see the result and ffmpeg still not identifying the file format.

linux at linux-Capella-IbexPeak-M-Chipset:~/Vídeos$ sudo ffmpeg -i Video1.264 -vn -af volumedetect -f null -
ffmpeg version N-73895-g323ec6b Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
libavutil      54. 28.100 / 54. 28.100
libavcodec     56. 50.101 / 56. 50.101
libavformat    56. 40.101 / 56. 40.101
libavdevice    56.  4.100 / 56.  4.100
libavfilter     5. 25.100 /  5. 25.100
libavresample   2.  1.  0 /  2.  1.  0
libswscale      3.  1.101 /  3.  1.101
libswresample   1.  2.101 /  1.  2.101
libpostproc    53.  3.100 / 53.  3.100
Video1.264: Invalid data found when processing input

It would be really cool if I could generate the graphics, I'll keep trying and researching.

Just a note, I am new to using ffmpeg, so I can post things that are my interpretation of what I have read.




Em Quarta-feira, 29 de Julho de 2015 17:46, Moritz Barsnick <barsnick at gmx.net> escreveu:
(André, your subject is wrong. ;-))

On Wed, Jul 29, 2015 at 15:33:31 -0500, Steve Boyer wrote:
> On Wed, Jul 29, 2015 at 3:09 PM, André Luís Duarte
> <andrelduarte-at-yahoo.com.br at ffmpeg.org> wrote:

> Probably shouldn't run ffmpeg as root, as your resulting video will be
> owned by root and can easily cause all kinds of permission issues.

There should _never_ be a need for this. If ffmpeg can't access a
device or file, fix that file's permissions.

> What I'm guessing is that the "-f H264" is telling ffmpeg that you
> want to export a .264 container format - which only contains video

No, it was given as an option _before_ "-i", so it's telling ffmpeg to
_import_ the given file as a raw H.264 stream. And that doesn't work
too well, because it can't be such a raw video if it contains audio.

As Steve suggested, just let ffmpeg detect the input itself.

To analyze the overall audio volume:
$ ffmpeg -i inputfile -vn -af volumedetect -f null -

(ffmpeg can also create graphs of the audio levels or waveforms over
time. Otherwise, you may want something like audacity.)

Moritz
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