On 01/03/15 21:22, Diego Biurrun wrote:
> On Sat, Feb 28, 2015 at 09:12:57PM +0100, Andreas Cadhalpun wrote:
>> From 850352d0e1c262b434094fb19787bbd5b6bf6c57 Mon Sep 17 00:00:00 2001
>> From: Andreas Cadhalpun <[email protected]>
>> Date: Sat, 28 Feb 2015 20:58:31 +0100
>> Subject: [PATCH] avformat/flvenc: check that the codec_tag fits in one byte
>>
>> flags is later written with avio_w8 and if it doesn't fit in one byte it
>> triggers an av_assert2.
>>
>> --- a/libavformat/flvenc.c
>> +++ b/libavformat/flvenc.c
>> @@ -537,7 +537,7 @@ static int flv_write_packet(AVFormatContext *s, AVPacket 
>> *pkt)
>>          avio_w8(pb, FLV_TAG_TYPE_VIDEO);
>>  
>>          flags = enc->codec_tag;
>> -        if (flags == 0) {
>> +        if (flags == 0 || flags < -128 || flags > 255) {
>>              av_log(s, AV_LOG_ERROR,
>>                     "Video codec '%s' is not compatible with FLV\n",
>>                     avcodec_get_name(enc->codec_id));
> 
> Maybe flags should be uint8_t instead?
> 

No, the proper way is to blacklist/whitelist the supported codecs for flv.

lu

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