[FFmpeg-devel] [PATCH] Fix MPEG-TS seek and frame positions in general

[Ivan Schreter]

Baptiste Coudurier wrote:
> Ivan Schreter wrote:
>   
>> [...]
>>  
>>  /* return non zero if a packet could be constructed */
>>  static void mpegts_push_data(MpegTSFilter *filter,
>> -                             const uint8_t *buf, int buf_size, int is_start)
>> +                             const uint8_t *buf, int buf_size, int is_start,
>> +                             int64_t pos)
>>  {
>>      PESContext *pes = filter->u.pes_filter.opaque;
>>      MpegTSContext *ts = pes->ts;
>> @@ -823,6 +825,8 @@
>>      if (is_start) {
>>          pes->state = MPEGTS_HEADER;
>>          pes->data_index = 0;
>> +        /* Note: file position points just after the TS packet, so subtract it */
>> +        pes->stream_pos = pos >= ts->raw_packet_size ? (pos - ts->raw_packet_size) : -1;
>>     
>
> Maybe ts->pos47 could be changed to store the offset of the last 0x47
> byte, get_pcr might will need change.
>
>   
Sorry, I do not understand what you mean.

> Besides I think stream_pos cannot be -1, there should be 0x47 byte
> before in any case, no ?
>   
In my tests, it was sometimes -1. To be honest, I didn't look into the 
reasons why...

Regards,

Ivan