diff options
Diffstat (limited to 'libavformat/movenc.c')
| -rw-r--r-- | libavformat/movenc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libavformat/movenc.c b/libavformat/movenc.c index 76fb251fa8..860e331b19 100644 --- a/libavformat/movenc.c +++ b/libavformat/movenc.c @@ -648,6 +648,23 @@ static struct mpeg4_bit_rate_values calculate_mpeg4_bit_rates(MOVTrack *track) struct mpeg4_bit_rate_values bit_rates = { 0 }; bit_rates.avg_bit_rate = compute_avg_bitrate(track); + if (!bit_rates.avg_bit_rate) { + // if the average bit rate cannot be calculated at this point, such as + // in the case of fragmented MP4, utilize the following values as + // fall-back in priority order: + // + // 1. average bit rate property + // 2. bit rate (usually average over the whole clip) + // 3. maximum bit rate property + + if (props && props->avg_bitrate) { + bit_rates.avg_bit_rate = props->avg_bitrate; + } else if (track->par->bit_rate) { + bit_rates.avg_bit_rate = track->par->bit_rate; + } else if (props && props->max_bitrate) { + bit_rates.avg_bit_rate = props->max_bitrate; + } + } // (FIXME should be max rate in any 1 sec window) bit_rates.max_bit_rate = FFMAX(track->par->bit_rate, |