> >>>>>> > [wmav2 @ 0x106829e20] prev_block_len_bits N out of range
> >>>>>> > (where N is in the range 4..6).
> >>>>>>
> >>>>>> Do these errors occur when you're decoding only a single file, without
> >>>>>> threading?
> >>>>>
> >>>>> Yes they do, and on both platforms, though I've never seen them cause
> >>>>> a segfault when not parallelised. Also interspersed with those errors
> >>>>> are
> >>>>> [wmav2 @ 0x1030a9800] overflow in spectral RLE, ignoring
> >>>>> [wmav2 @ 0x1030a9800] frame_len overflow
> >>>>>
> >>>>> And very occasionally
> >>>>> [wmav2 @ 0x1030a9800] len -211 invalid
> >>>>>
> >>>>> Do these errors suggest anything in particular to you?
> >>>>
> >>>> Yes, is it possible you're not setting AVCodecContext->bit_rate,
> >>>> ->block_align, ->extradata or ->extradata_size?
> >>>
> >>> I had thought (based on what I'd read in the ffmpeg doxygen) that all
> >>> of those fields (certainly bit_rate, extra_data and extradata_size)
> >>> were set internally by libav for decoding, and only needed to be set
> >>> by the user for encoding?
> >>>
> >>> If I'm wrong, could you suggest what I should set them to, for a
> >>> general decoding solution? I'm seeing no examples online that set
> >>> them.
> >>
> >> They are set, but (in the case of WMA) by the demuxer instead of the
> >> decoder. My impression is you're not using the
> >> AVFormatContext->streams[%d]->codec for decoding, but rather create
> >> one independently. Then you need to copy the demuxer values to the
> >> decoder values. If you're using your own demuxer instead of
> >> libavformat's, see libavformat for how to read them.
> >>
> >
> > I'm doing something in the neighbourhood of this:
> >
> > AVCodecContext* cCtx = fCtx->streams[audioStream]->codec;
> > codec = avcodec_find_decoder(cCtx->codec_id);
> > if(codec == NULL){
> > throw Exception();
> > }
> > if(avcodec_open2(cCtx, codec, &opts) < 0){
> > throw Exception();
> > }
> >
> > And then passing that codec context into the decode job. So I think
> > that should be fine, no?
>
> Probably. Can a tool like avconv or avplay playback the file
> succesfully without throwing errors?
Yes. Plays back with no errors at all.
_______________________________________________
libav-api mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-api
