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734ccb6d6b
This fixes issue #1. It appears there are inputs where the dts fluctuates. This is apparently inputs that are not well formed. However, I discovered that ffmpeg itself allows for this. If it detects this happening, it updates the pts/dts of the packet. To do this, it tracks the last output dts. This ensures the output dts is monotonic even if the input is not. I use essentially the same approach as in ffmpeg.
51 lines
1019 B
C
51 lines
1019 B
C
#ifndef _VIDEOSTREAMER_H
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#define _VIDEOSTREAMER_H
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#include <libavformat/avformat.h>
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#include <stdbool.h>
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#include <stdint.h>
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struct VSInput {
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AVFormatContext * format_ctx;
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int video_stream_index;
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};
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struct VSOutput {
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AVFormatContext * format_ctx;
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// Track the last dts we output. We use it to double check that dts is
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// monotonic.
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//
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// I am not sure if it is available anywhere already. I tried
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// AVStream->info->last_dts and that is apparently not set.
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int64_t last_dts;
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};
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void
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vs_setup(void);
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struct VSInput *
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vs_open_input(const char * const,
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const char * const, const bool);
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void
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vs_destroy_input(struct VSInput * const);
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struct VSOutput *
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vs_open_output(const char * const,
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const char * const, const struct VSInput * const,
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const bool);
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void
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vs_destroy_output(struct VSOutput * const);
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int
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vs_read_packet(const struct VSInput *, AVPacket * const,
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const bool);
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int
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vs_write_packet(const struct VSInput * const,
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struct VSOutput * const, AVPacket * const, const bool);
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#endif
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