On 5/12/17, Eric Beuque <eric.beu...@gmail.com> wrote:
> Hi,
>
> i'm not really sure but i think a found a bug in the avi decoder of
> avformat.
>
> In the following function of the avidec.c:
>
> static int avi_read_header(AVFormatContext *s)
> {
> ...
> switch (tag) {
> ...
> case MKTAG('s', 't', 'r', 'f'):
> /* stream header */
> if (!size)
> break;
> if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
> avio_skip(pb, size);
> } else {
> ...
> switch (codec_type) {
> ...
> default:
> st->codec->codec_type = AVMEDIA_TYPE_DATA;
> st->codec->codec_id = AV_CODEC_ID_NONE;
> st->codec->codec_tag = 0;
> avio_skip(pb, size);
> break;
> }
> }
> break;
> ...
> }
>
> If the codec_type is AVMEDIA_TYPE_DATA, but the format is empty (size=0)
> (which i think is allowed), then the codec_id is not set to
> AV_CODEC_ID_NONE.
>
> This will generate a trace when calling the avformat_find_stream_info:
> "Could not find codec parameters for stream 1 (Unknown: none): unknown codec
> Consider increasing the value for the 'analyzeduration' and 'probesize'
> options"
>
> I'm not really sure about he AVI spec if the format is mandatory or not,
> but i think there is a bug.
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
AVI is not decoder
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
