fate: Add tests of the ff_make_absolute_url function
[ffmpeg.git] / avconv.c
index b786d8d..9aaa4a8 100644 (file)
--- a/avconv.c
+++ b/avconv.c
@@ -143,7 +143,7 @@ static int decode_interrupt_cb(void *ctx)
 
 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
 
-void exit_program(int ret)
+static void exit_program(void)
 {
     int i, j;
 
@@ -180,10 +180,11 @@ void exit_program(int ret)
             bsfc = next;
         }
         output_streams[i]->bitstream_filters = NULL;
+        avcodec_free_frame(&output_streams[i]->filtered_frame);
 
         av_freep(&output_streams[i]->forced_keyframes);
         av_freep(&output_streams[i]->avfilter);
-        av_freep(&output_streams[i]->filtered_frame);
+        av_freep(&output_streams[i]->logfile_prefix);
         av_freep(&output_streams[i]);
     }
     for (i = 0; i < nb_input_files; i++) {
@@ -191,7 +192,7 @@ void exit_program(int ret)
         av_freep(&input_files[i]);
     }
     for (i = 0; i < nb_input_streams; i++) {
-        av_freep(&input_streams[i]->decoded_frame);
+        avcodec_free_frame(&input_streams[i]->decoded_frame);
         av_dict_free(&input_streams[i]->opts);
         free_buffer_pool(&input_streams[i]->buffer_pool);
         av_freep(&input_streams[i]->filters);
@@ -217,8 +218,6 @@ void exit_program(int ret)
                (int) received_sigterm);
         exit (255);
     }
-
-    exit(ret);
 }
 
 void assert_avoptions(AVDictionary *m)
@@ -226,7 +225,7 @@ void assert_avoptions(AVDictionary *m)
     AVDictionaryEntry *t;
     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
-        exit_program(1);
+        exit(1);
     }
 }
 
@@ -243,7 +242,7 @@ static void assert_codec_experimental(AVCodecContext *c, int encoder)
         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
                    codec_string, codec->name);
-        exit_program(1);
+        exit(1);
     }
 }
 
@@ -268,22 +267,41 @@ static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
         const enum AVSampleFormat *p;
-        int min_dec = -1, min_inc = -1;
+        int min_dec = INT_MAX, min_inc = INT_MAX;
+        enum AVSampleFormat dec_fmt = AV_SAMPLE_FMT_NONE;
+        enum AVSampleFormat inc_fmt = AV_SAMPLE_FMT_NONE;
 
         /* find a matching sample format in the encoder */
         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
             if (*p == enc->sample_fmt) {
                 dec->request_sample_fmt = *p;
                 return;
-            } else if (*p > enc->sample_fmt) {
-                min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
-            } else
-                min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
+            } else {
+                enum AVSampleFormat dfmt = av_get_packed_sample_fmt(*p);
+                enum AVSampleFormat efmt = av_get_packed_sample_fmt(enc->sample_fmt);
+                int fmt_diff = 32 * abs(dfmt - efmt);
+                if (av_sample_fmt_is_planar(*p) !=
+                    av_sample_fmt_is_planar(enc->sample_fmt))
+                    fmt_diff++;
+                if (dfmt == efmt) {
+                    min_inc = fmt_diff;
+                    inc_fmt = *p;
+                } else if (dfmt > efmt) {
+                    if (fmt_diff < min_inc) {
+                        min_inc = fmt_diff;
+                        inc_fmt = *p;
+                    }
+                } else {
+                    if (fmt_diff < min_dec) {
+                        min_dec = fmt_diff;
+                        dec_fmt = *p;
+                    }
+                }
+            }
         }
 
         /* if none match, provide the one that matches quality closest */
-        dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
-                                  enc->sample_fmt - min_dec;
+        dec->request_sample_fmt = min_inc != INT_MAX ? inc_fmt : dec_fmt;
     }
 }
 
@@ -323,7 +341,7 @@ static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
                    avctx->codec ? avctx->codec->name : "copy");
             print_error("", a);
             if (exit_on_error)
-                exit_program(1);
+                exit(1);
         }
         *pkt = new_pkt;
 
@@ -334,7 +352,7 @@ static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
     ret = av_interleaved_write_frame(s, pkt);
     if (ret < 0) {
         print_error("av_interleaved_write_frame()", ret);
-        exit_program(1);
+        exit(1);
     }
 }
 
@@ -345,7 +363,7 @@ static int check_recording_time(OutputStream *ost)
     if (of->recording_time != INT64_MAX &&
         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
                       AV_TIME_BASE_Q) >= 0) {
-        ost->is_past_recording_time = 1;
+        ost->finished = 1;
         return 0;
     }
     return 1;
@@ -371,7 +389,7 @@ static void do_audio_out(AVFormatContext *s, OutputStream *ost,
 
     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
-        exit_program(1);
+        exit(1);
     }
 
     if (got_packet) {
@@ -442,7 +460,7 @@ static void do_subtitle_out(AVFormatContext *s,
     if (pts == AV_NOPTS_VALUE) {
         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
         if (exit_on_error)
-            exit_program(1);
+            exit(1);
         return;
     }
 
@@ -474,7 +492,7 @@ static void do_subtitle_out(AVFormatContext *s,
                                                     subtitle_out_max_size, sub);
         if (subtitle_out_size < 0) {
             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
-            exit_program(1);
+            exit(1);
         }
 
         av_init_packet(&pkt);
@@ -574,7 +592,7 @@ static void do_video_out(AVFormatContext *s,
         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
         if (ret < 0) {
             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
-            exit_program(1);
+            exit(1);
         }
 
         if (got_packet) {
@@ -619,7 +637,7 @@ static void do_video_stats(AVFormatContext *os, OutputStream *ost,
         vstats_file = fopen(vstats_filename, "w");
         if (!vstats_file) {
             perror("fopen");
-            exit_program(1);
+            exit(1);
         }
     }
 
@@ -719,7 +737,7 @@ static int poll_filter(OutputStream *ost)
  */
 static int poll_filters(void)
 {
-    int i, ret = 0;
+    int i, j, ret = 0;
 
     while (ret >= 0 && !received_sigterm) {
         OutputStream *ost = NULL;
@@ -729,8 +747,7 @@ static int poll_filters(void)
         for (i = 0; i < nb_output_streams; i++) {
             int64_t pts = output_streams[i]->sync_opts;
 
-            if (!output_streams[i]->filter ||
-                output_streams[i]->is_past_recording_time)
+            if (!output_streams[i]->filter || output_streams[i]->finished)
                 continue;
 
             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
@@ -747,10 +764,14 @@ static int poll_filters(void)
         ret = poll_filter(ost);
 
         if (ret == AVERROR_EOF) {
-            ost->is_past_recording_time = 1;
+            OutputFile *of = output_files[ost->file_index];
 
-            if (opt_shortest)
-                return ret;
+            ost->finished = 1;
+
+            if (of->shortest) {
+                for (j = 0; j < of->ctx->nb_streams; j++)
+                    output_streams[of->ost_index + j]->finished = 1;
+            }
 
             ret = 0;
         } else if (ret == AVERROR(EAGAIN))
@@ -821,7 +842,7 @@ static void print_report(int is_last_report, int64_t timer_start)
                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
                     qp_histogram[qp]++;
                 for (j = 0; j < 32; j++)
-                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
+                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
             }
             if (enc->flags&CODEC_FLAG_PSNR) {
                 int j;
@@ -929,7 +950,7 @@ static void flush_encoders(void)
                 ret = encode(enc, &pkt, NULL, &got_packet);
                 if (ret < 0) {
                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
-                    exit_program(1);
+                    exit(1);
                 }
                 *size += ret;
                 if (ost->logfile && enc->stats_out) {
@@ -983,7 +1004,7 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
 
     if (of->recording_time != INT64_MAX &&
         ist->last_dts >= of->recording_time + of->start_time) {
-        ost->is_past_recording_time = 1;
+        ost->finished = 1;
         return;
     }
 
@@ -1069,15 +1090,11 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
     decoded_frame = ist->decoded_frame;
 
     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
-    if (ret < 0) {
-        return ret;
-    }
-
-    if (!*got_output) {
-        /* no audio frame */
-        if (!pkt->size)
+    if (!*got_output || ret < 0) {
+        if (!pkt->size) {
             for (i = 0; i < ist->nb_filters; i++)
                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
+        }
         return ret;
     }
 
@@ -1144,7 +1161,7 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
             av_log(NULL, AV_LOG_FATAL,
                    "Audio volume adjustment on sample format %s is not supported.\n",
                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
-            exit_program(1);
+            exit(1);
         }
     }
 
@@ -1161,7 +1178,7 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
                    "layout for Input Stream #%d.%d\n", ist->file_index,
                    ist->st->index);
-            exit_program(1);
+            exit(1);
         }
         decoded_frame->channel_layout = avctx->channel_layout;
 
@@ -1187,7 +1204,7 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
             if (ist_in_filtergraph(filtergraphs[i], ist) &&
                 configure_filtergraph(filtergraphs[i]) < 0) {
                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
-                exit_program(1);
+                exit(1);
             }
     }
 
@@ -1216,17 +1233,15 @@ static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
 
     ret = avcodec_decode_video2(ist->st->codec,
                                 decoded_frame, got_output, pkt);
-    if (ret < 0)
-        return ret;
-
-    quality = same_quant ? decoded_frame->quality : 0;
-    if (!*got_output) {
-        /* no picture yet */
-        if (!pkt->size)
+    if (!*got_output || ret < 0) {
+        if (!pkt->size) {
             for (i = 0; i < ist->nb_filters; i++)
                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
+        }
         return ret;
     }
+
+    quality = same_quant ? decoded_frame->quality : 0;
     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
                                            decoded_frame->pkt_dts);
     pkt->size = 0;
@@ -1247,6 +1262,10 @@ static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
 
+        ret = poll_filters();
+        if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
+            av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
+
         ist->resample_width   = decoded_frame->width;
         ist->resample_height  = decoded_frame->height;
         ist->resample_pix_fmt = decoded_frame->format;
@@ -1255,7 +1274,7 @@ static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
             if (ist_in_filtergraph(filtergraphs[i], ist) &&
                 configure_filtergraph(filtergraphs[i]) < 0) {
                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
-                exit_program(1);
+                exit(1);
             }
     }
 
@@ -1421,7 +1440,7 @@ static void print_sdp(void)
     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
 
     if (!avc)
-        exit_program(1);
+        exit(1);
     for (i = 0; i < nb_output_files; i++)
         avc[i] = output_files[i]->ctx;
 
@@ -1509,7 +1528,7 @@ static void parse_forced_key_frames(char *kf, OutputStream *ost,
     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
     if (!ost->forced_kf_pts) {
         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
-        exit_program(1);
+        exit(1);
     }
 
     p = kf;
@@ -1530,7 +1549,7 @@ static int transcode_init(void)
 {
     int ret = 0, i, j, k;
     AVFormatContext *oc;
-    AVCodecContext *codec, *icodec;
+    AVCodecContext *codec;
     OutputStream *ost;
     InputStream *ist;
     char error[1024];
@@ -1561,6 +1580,7 @@ static int transcode_init(void)
 
     /* for each output stream, we compute the right encoding parameters */
     for (i = 0; i < nb_output_streams; i++) {
+        AVCodecContext *icodec = NULL;
         ost = output_streams[i];
         oc  = output_files[ost->file_index]->ctx;
         ist = get_input_stream(ost);
@@ -1622,7 +1642,7 @@ static int transcode_init(void)
             case AVMEDIA_TYPE_AUDIO:
                 if (audio_volume != 256) {
                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
-                    exit_program(1);
+                    exit(1);
                 }
                 codec->channel_layout     = icodec->channel_layout;
                 codec->sample_rate        = icodec->sample_rate;
@@ -1684,7 +1704,11 @@ static int transcode_init(void)
                 (video_sync_method ==  VSYNC_CFR ||
                  (video_sync_method ==  VSYNC_AUTO &&
                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
-                ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
+                ost->frame_rate = ist->framerate.num ? ist->framerate :
+                                  ist->st->avg_frame_rate.num ?
+                                  ist->st->avg_frame_rate :
+                                  (AVRational){25, 1};
+
                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
                     ost->frame_rate = ost->enc->supported_framerates[idx];
@@ -1721,9 +1745,10 @@ static int transcode_init(void)
                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
 
-                if (codec->width   != icodec->width  ||
-                    codec->height  != icodec->height ||
-                    codec->pix_fmt != icodec->pix_fmt) {
+                if (icodec &&
+                    (codec->width   != icodec->width  ||
+                     codec->height  != icodec->height ||
+                     codec->pix_fmt != icodec->pix_fmt)) {
                     codec->bits_per_raw_sample = 0;
                 }
 
@@ -1744,7 +1769,8 @@ static int transcode_init(void)
                 FILE *f;
 
                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
-                         pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
+                         ost->logfile_prefix ? ost->logfile_prefix :
+                                               DEFAULT_PASS_LOGFILENAME_PREFIX,
                          i);
                 if (!strcmp(ost->enc->name, "libx264")) {
                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
@@ -1754,7 +1780,7 @@ static int transcode_init(void)
                         if (!f) {
                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
                                    logfilename, strerror(errno));
-                            exit_program(1);
+                            exit(1);
                         }
                         ost->logfile = f;
                     } else {
@@ -1763,7 +1789,7 @@ static int transcode_init(void)
                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
                                    logfilename);
-                            exit_program(1);
+                            exit(1);
                         }
                         codec->stats_in = logbuffer;
                     }
@@ -1938,13 +1964,13 @@ static int need_output(void)
         OutputFile *of       = output_files[ost->file_index];
         AVFormatContext *os  = output_files[ost->file_index]->ctx;
 
-        if (ost->is_past_recording_time ||
+        if (ost->finished ||
             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
             continue;
         if (ost->frame_number >= ost->max_frames) {
             int j;
             for (j = 0; j < of->ctx->nb_streams; j++)
-                output_streams[of->ost_index + j]->is_past_recording_time = 1;
+                output_streams[of->ost_index + j]->finished = 1;
             continue;
         }
 
@@ -2112,13 +2138,134 @@ static void reset_eagain(void)
         input_files[i]->eagain = 0;
 }
 
+/**
+ * Read one packet from an input file and send it for
+ * - decoding -> lavfi (audio/video)
+ * - decoding -> encoding -> muxing (subtitles)
+ * - muxing (streamcopy)
+ *
+ * @return
+ * - 0 -- one packet was read and processed
+ * - AVERROR(EAGAIN) -- no packets were available for selected file,
+ *   this function should be called again
+ * - AVERROR_EOF -- this function should not be called again
+ */
+static int process_input(void)
+{
+    InputFile *ifile;
+    AVFormatContext *is;
+    InputStream *ist;
+    AVPacket pkt;
+    int ret, i, j;
+
+    /* select the stream that we must read now */
+    ifile = select_input_file();
+    /* if none, if is finished */
+    if (!ifile) {
+        if (got_eagain()) {
+            reset_eagain();
+            av_usleep(10000);
+            return AVERROR(EAGAIN);
+        }
+        av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
+        return AVERROR_EOF;
+    }
+
+    is  = ifile->ctx;
+    ret = get_input_packet(ifile, &pkt);
+
+    if (ret == AVERROR(EAGAIN)) {
+        ifile->eagain = 1;
+        return ret;
+    }
+    if (ret < 0) {
+        if (ret != AVERROR_EOF) {
+            print_error(is->filename, ret);
+            if (exit_on_error)
+                exit(1);
+        }
+        ifile->eof_reached = 1;
+
+        for (i = 0; i < ifile->nb_streams; i++) {
+            ist = input_streams[ifile->ist_index + i];
+            if (ist->decoding_needed)
+                output_packet(ist, NULL);
+
+            /* mark all outputs that don't go through lavfi as finished */
+            for (j = 0; j < nb_output_streams; j++) {
+                OutputStream *ost = output_streams[j];
+
+                if (ost->source_index == ifile->ist_index + i &&
+                    (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
+                    ost->finished= 1;
+            }
+        }
+
+        return AVERROR(EAGAIN);
+    }
+
+    reset_eagain();
+
+    if (do_pkt_dump) {
+        av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
+                         is->streams[pkt.stream_index]);
+    }
+    /* the following test is needed in case new streams appear
+       dynamically in stream : we ignore them */
+    if (pkt.stream_index >= ifile->nb_streams)
+        goto discard_packet;
+
+    ist = input_streams[ifile->ist_index + pkt.stream_index];
+    if (ist->discard)
+        goto discard_packet;
+
+    if (pkt.dts != AV_NOPTS_VALUE)
+        pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
+    if (pkt.pts != AV_NOPTS_VALUE)
+        pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
+
+    if (pkt.pts != AV_NOPTS_VALUE)
+        pkt.pts *= ist->ts_scale;
+    if (pkt.dts != AV_NOPTS_VALUE)
+        pkt.dts *= ist->ts_scale;
+
+    if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
+        (is->iformat->flags & AVFMT_TS_DISCONT)) {
+        int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
+        int64_t delta   = pkt_dts - ist->next_dts;
+
+        if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
+            ifile->ts_offset -= delta;
+            av_log(NULL, AV_LOG_DEBUG,
+                   "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
+                   delta, ifile->ts_offset);
+            pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
+            if (pkt.pts != AV_NOPTS_VALUE)
+                pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
+        }
+    }
+
+    ret = output_packet(ist, &pkt);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
+               ist->file_index, ist->st->index);
+        if (exit_on_error)
+            exit(1);
+    }
+
+discard_packet:
+    av_free_packet(&pkt);
+
+    return 0;
+}
+
 /*
  * The following code is the main loop of the file converter
  */
 static int transcode(void)
 {
-    int ret, i;
-    AVFormatContext *is, *os;
+    int ret, i, need_input = 1;
+    AVFormatContext *os;
     OutputStream *ost;
     InputStream *ist;
     int64_t timer_start;
@@ -2138,107 +2285,28 @@ static int transcode(void)
 #endif
 
     while (!received_sigterm) {
-        InputFile *ifile;
-        AVPacket pkt;
-
         /* check if there's any stream where output is still needed */
         if (!need_output()) {
             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
             break;
         }
 
-        /* select the stream that we must read now */
-        ifile = select_input_file();
-        /* if none, if is finished */
-        if (!ifile) {
-            if (got_eagain()) {
-                reset_eagain();
-                av_usleep(10000);
-                continue;
-            }
-            av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
-            break;
+        /* read and process one input packet if needed */
+        if (need_input) {
+            ret = process_input();
+            if (ret == AVERROR_EOF)
+                need_input = 0;
         }
 
-        is  = ifile->ctx;
-        ret = get_input_packet(ifile, &pkt);
-
-        if (ret == AVERROR(EAGAIN)) {
-            ifile->eagain = 1;
-            continue;
-        }
+        ret = poll_filters();
         if (ret < 0) {
-            if (ret != AVERROR_EOF) {
-                print_error(is->filename, ret);
-                if (exit_on_error)
-                    exit_program(1);
-            }
-            ifile->eof_reached = 1;
-
-            for (i = 0; i < ifile->nb_streams; i++) {
-                ist = input_streams[ifile->ist_index + i];
-                if (ist->decoding_needed)
-                    output_packet(ist, NULL);
-            }
-
-            if (opt_shortest)
-                break;
-            else
+            if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
                 continue;
-        }
-
-        reset_eagain();
-
-        if (do_pkt_dump) {
-            av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
-                             is->streams[pkt.stream_index]);
-        }
-        /* the following test is needed in case new streams appear
-           dynamically in stream : we ignore them */
-        if (pkt.stream_index >= ifile->nb_streams)
-            goto discard_packet;
 
-        ist = input_streams[ifile->ist_index + pkt.stream_index];
-        if (ist->discard)
-            goto discard_packet;
-
-        if (pkt.dts != AV_NOPTS_VALUE)
-            pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
-        if (pkt.pts != AV_NOPTS_VALUE)
-            pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
-
-        if (pkt.pts != AV_NOPTS_VALUE)
-            pkt.pts *= ist->ts_scale;
-        if (pkt.dts != AV_NOPTS_VALUE)
-            pkt.dts *= ist->ts_scale;
-
-        if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
-            && (is->iformat->flags & AVFMT_TS_DISCONT)) {
-            int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
-            int64_t delta   = pkt_dts - ist->next_dts;
-            if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
-                ifile->ts_offset -= delta;
-                av_log(NULL, AV_LOG_DEBUG,
-                       "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
-                       delta, ifile->ts_offset);
-                pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
-                if (pkt.pts != AV_NOPTS_VALUE)
-                    pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
-            }
-        }
-
-        if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
-            av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
-                   ist->file_index, ist->st->index);
-            if (exit_on_error)
-                exit_program(1);
-            av_free_packet(&pkt);
-            continue;
+            av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
+            break;
         }
 
-    discard_packet:
-        av_free_packet(&pkt);
-
         /* dump report by using the output first video and audio streams */
         print_report(0, timer_start);
     }
@@ -2351,7 +2419,7 @@ static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
 {
     int idx = locate_option(argc, argv, options, "cpuflags");
     if (idx && argv[idx + 1])
-        opt_cpuflags("cpuflags", argv[idx + 1]);
+        opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
 }
 
 int main(int argc, char **argv)
@@ -2359,6 +2427,8 @@ int main(int argc, char **argv)
     OptionsContext o = { 0 };
     int64_t ti;
 
+    atexit(exit_program);
+
     reset_options(&o);
 
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
@@ -2382,29 +2452,24 @@ int main(int argc, char **argv)
     if (nb_output_files <= 0 && nb_input_files == 0) {
         show_usage();
         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
-        exit_program(1);
+        exit(1);
     }
 
     /* file converter / grab */
     if (nb_output_files <= 0) {
         fprintf(stderr, "At least one output file must be specified\n");
-        exit_program(1);
-    }
-
-    if (nb_input_files == 0) {
-        av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
-        exit_program(1);
+        exit(1);
     }
 
     ti = getutime();
     if (transcode() < 0)
-        exit_program(1);
+        exit(1);
     ti = getutime() - ti;
     if (do_benchmark) {
         int maxrss = getmaxrss() / 1024;
         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
     }
 
-    exit_program(0);
+    exit(0);
     return 0;
 }