libavcodec/h261dec.c:512: error: Integer Overflow L2
  ([0, +oo] - 8):unsigned32 by call to `bitstream_skip`.

libavcodec/h261dec.c:508:5: Call
506. 
507.     bitstream_skip(&s->bc, 1); /* still image mode off */
508.     bitstream_skip(&s->bc, 1); /* Reserved */
         ^
509. 
510.     /* PEI */

libavcodec/bitstream.h:247:9: Assignment
  245.         n -= bc->bits_left;
  246.         bc->bits      = 0;
  247.         bc->bits_left = 0;
               ^
  248. 
  249.         if (n >= 64) {

libavcodec/bitstream.h:255:9: Call
  253.             bc->ptr += skip;
  254.         }
  255.         refill_64(bc);
               ^
  256.         if (n)
  257.             skip_remaining(bc, n);

libavcodec/bitstream.h:45:1: Parameter `bc->bits_left`
    43. } BitstreamContext;
    44. 
    45. static inline void refill_64(BitstreamContext *bc)
        ^
    46. {
    47.     if (bc->ptr >= bc->buffer_end)

libavcodec/h261dec.c:511:12: Call
509. 
510.     /* PEI */
511.     while (bitstream_read_bit(&s->bc) != 0)
                ^
512.         bitstream_skip(&s->bc, 8);
513. 

libavcodec/bitstream.h:144:1: Parameter `bc->bits_left`
  142. 
  143. /* Return one bit from the buffer. */
  144. static inline unsigned bitstream_read_bit(BitstreamContext *bc)
       ^
  145. {
  146.     if (!bc->bits_left)

libavcodec/bitstream.h:149:12: Call
  147.         refill_64(bc);
  148. 
  149.     return get_val(bc, 1);
                  ^
  150. }
  151. 

libavcodec/bitstream.h:129:1: Parameter `n`
    127. }
    128. 
    129. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    130. {
    131. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:138:5: Assignment
    136.     bc->bits <<= n;
    137. #endif
    138.     bc->bits_left -= n;
             ^
    139. 
    140.     return ret;

libavcodec/h261dec.c:512:9: Call
510.     /* PEI */
511.     while (bitstream_read_bit(&s->bc) != 0)
512.         bitstream_skip(&s->bc, 8);
             ^
513. 
514.     /* H.261 has no I-frames, but if we pass AV_PICTURE_TYPE_I for the first

libavcodec/bitstream.h:240:1: Parameter `n`
  238. 
  239. /* Skip n bits in the buffer. */
  240. static inline void bitstream_skip(BitstreamContext *bc, unsigned n)
       ^
  241. {
  242.     if (n < bc->bits_left)

libavcodec/bitstream.h:243:9: Call
  241. {
  242.     if (n < bc->bits_left)
  243.         skip_remaining(bc, n);
               ^
  244.     else {
  245.         n -= bc->bits_left;

libavcodec/bitstream.h:229:1: <LHS trace>
227. }
228. 
229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
     ^
230. {
231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: Parameter `bc->bits_left`
    227. }
    228. 
    229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
         ^
    230. {
    231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: <RHS trace>
227. }
228. 
229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
     ^
230. {
231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: Parameter `n`
    227. }
    228. 
    229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
         ^
    230. {
    231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:236:5: Binary operation: ([0, +oo] - 8):unsigned32 by call to `bitstream_skip` 
    234.     bc->bits <<= n;
    235. #endif
    236.     bc->bits_left -= n;
             ^
    237. }
    238. 
