[Libav-user] Encoders not working (Even using transcoding.c example)

[M N]

I am just using normal launch: transcoding.exe input.mp4 output.mp4, I have also tried output.avi, it doesn't work...

08.09.2016, 00:00, "Paul B Mahol" <onemda at gmail.com>:
> On 9/7/16, M N <assemblerx86 at yandex.com> wrote:
>>  Hi,
>>
>>   I have been getting errors regarding encoders such as: "Tag avc1/
>>  incompatible with output codec id '28'" while trying to encode anything, I
>>  also get errors such as "Invalid data detected in input" while trying to use
>>  avformat_write_header(). I am using latest FFMPEG Dev and Shared. And YES, I
>>  have tried many other videos.
>>
>>   So I have tried compiling "transcoding.c" ffmpeg example, and I could
>>  compile it, but when I tested it, I get this error:
>>
>>  *************************************************************
>>> testffc vid.mp4 vid3.mp4
>>  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'vid.mp4':
>>    Metadata:
>>      major_brand : mp42
>>      minor_version : 0
>>      compatible_brands: isommp42
>>      creation_time : 2012-11-25T22:19:36.000000Z
>>    Duration: 00:03:51.80, start: 0.000000, bitrate: 1023 kb/s
>>      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
>>  1280x720,
>>   829 kb/s, 10 fps, 10 tbr, 20 tbn, 20 tbc (default)
>>      Metadata:
>>        creation_time : 1970-01-01T00:00:00.000000Z
>>        handler_name : VideoHandler
>>      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo,
>>  flt
>>  p, 191 kb/s (default)
>>      Metadata:
>>        creation_time : 2012-11-25T22:19:36.000000Z
>>        handler_name : IsoMedia File Produced by Google, 5-11-2011
>>  [libx264 @ 01e7a540] broken ffmpeg default settings detected
>>  [libx264 @ 01e7a540] use an encoding preset (e.g. -vpre medium)
>>  [libx264 @ 01e7a540] preset usage: -vpre <speed> -vpre <profile>
>>  [libx264 @ 01e7a540] speed presets are listed in x264 --help
>>  [libx264 @ 01e7a540] profile is optional; x264 defaults to high
>>  Cannot open video encoder for stream #0
>>  Error occurred: Generic error in an external library
>>  *************************************************************
>>
>>  Is it a bug in FFMPEG?? I couldn't get anything to work so far...
>
> transcoding.c is example not 100% final product.
>
> Read messages carefully and set encoder options as advised.
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