[FFmpeg-devel] [PATCH] libavformat/hlsenc: fix broken -hls_flags +temp_file

Aleksey Skripka caspy at undev.ru
Fri Dec 14 11:27:38 EET 2018


greetings!

fixed version.
thanks.

---
--- libavformat/hlsenc.c.orig      2018-12-14 09:25:06.541809226 +0000
+++ libavformat/hlsenc.c        2018-12-14 09:19:16.129377384 +0000
@@ -1348,7 +1348,7 @@ static int hls_window(AVFormatContext *s
     char temp_filename[1024];
     int64_t sequence = FFMAX(hls->start_sequence, vs->sequence - vs->nb_entries);
     const char *proto = avio_find_protocol_name(s->url);
-    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
+    int use_temp_file = proto && !strcmp(proto, "file");
     static unsigned warned_non_file;
     char *key_uri = NULL;
     char *iv_string = NULL;
@@ -1463,7 +1463,7 @@ static int hls_start(AVFormatContext *s,
     AVFormatContext *vtt_oc = vs->vtt_avf;
     AVDictionary *options = NULL;
     const char *proto = avio_find_protocol_name(s->url);
-    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
+    int use_temp_file = proto && !strcmp(proto, "file") && (c->flags & HLS_TEMP_FILE);
     char *filename, iv_string[KEYSIZE*2 + 1];
     int err = 0;

@@ -2123,7 +2123,7 @@ static int hls_write_packet(AVFormatCont
     int stream_index = 0;
     int range_length = 0;
     const char *proto = avio_find_protocol_name(s->url);
-    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
+    int use_temp_file = proto && !strcmp(proto, "file") && (hls->flags & HLS_TEMP_FILE);
     uint8_t *buffer = NULL;
     VariantStream *vs = NULL;
     AVDictionary *options = NULL;
@@ -2251,7 +2251,6 @@ static int hls_write_packet(AVFormatCont
             if (hls->flags & HLS_SINGLE_FILE) {
                 ret = flush_dynbuf(vs, &range_length);
                 if (ret < 0) {
-                    av_free(old_filename);
                     return ret;
                 }
                 vs->size = range_length;
@@ -2269,20 +2268,12 @@ static int hls_write_packet(AVFormatCont
                     return ret;
                 }
                 ff_format_io_close(s, &vs->out);
-
-                // rename that segment from .tmp to the real one
-                if (use_temp_file && oc->url[0]) {
-                    hls_rename_temp_file(s, oc);
-                    av_free(old_filename);
-                    old_filename = av_strdup(vs->avf->url);
-
-                    if (!old_filename) {
-                        return AVERROR(ENOMEM);
-                    }
-                }
             }
         }

+        if (use_temp_file && oc->url[0] && !(hls->flags & HLS_SINGLE_FILE))
+            hls_rename_temp_file(s, oc);
+
         old_filename = av_strdup(vs->avf->url);
         if (!old_filename) {
             return AVERROR(ENOMEM);
@@ -2348,7 +2339,7 @@ static int hls_write_trailer(struct AVFo
     AVFormatContext *vtt_oc = NULL;
     char *old_filename = NULL;
     const char *proto = avio_find_protocol_name(s->url);
-    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
+    int use_temp_file = proto && !strcmp(proto, "file") && (hls->flags & HLS_TEMP_FILE);
     int i;
     int ret = 0;
     VariantStream *vs = NULL;
---

-- 
Aleksey Skripka



> On 14 Dec 2018, at 11:38, Liu Steven <lq at chinaffmpeg.org> wrote:
> 
> 
> 
>> 在 2018年12月14日,下午3:04,Aleksey Skripka <caspy at undev.ru> 写道:
>> 
>> greetings!
>> 
>> after commit 223d2bde22ce33dcbcb6f17f234b609cb98f1fb6 temp_file functionality totally broken.
>> 
>> attached patch prototype will fix:
>> 1) while assigning 'use_temp_file'  addressing to '->flags' is done incorrectly in 4 places.
>> 2) before that commit playlist was always created via .tmp for 'file' proto, now not. sure we should keep it in such way, thus not look for this flag in hls_window().
>> 3) rename logic in hls_write_packet() was accidentally moved to fMP4-only code, thus not renaming files for mpegts.
>> 4) av_free() call, where variable always NULL.
>> 
>> please take a look.
>> 
>> ---
>> --- libavformat/hlsenc.c.orig      2018-12-13 13:27:03.307499151 +0000
>> +++ libavformat/hlsenc.c        2018-12-13 20:19:59.781833259 +0000
>> @@ -1348,7 +1348,7 @@ static int hls_window(AVFormatContext *s
>>    char temp_filename[1024];
>>    int64_t sequence = FFMAX(hls->start_sequence, vs->sequence - vs->nb_entries);
>>    const char *proto = avio_find_protocol_name(s->url);
>> -    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
>> +    int use_temp_file = proto && !strcmp(proto, "file")/* && (hls->flags & HLS_TEMP_FILE)*/; // always use .tmp logic for 'file' proto.
>>    static unsigned warned_non_file;
>>    char *key_uri = NULL;
>>    char *iv_string = NULL;
>> @@ -1463,7 +1463,7 @@ static int hls_start(AVFormatContext *s,
>>    AVFormatContext *vtt_oc = vs->vtt_avf;
>>    AVDictionary *options = NULL;
>>    const char *proto = avio_find_protocol_name(s->url);
>> -    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
>> +    int use_temp_file = proto && !strcmp(proto, "file") && (c->flags & HLS_TEMP_FILE);
>>    char *filename, iv_string[KEYSIZE*2 + 1];
>>    int err = 0;
>> 
>> @@ -2123,7 +2123,7 @@ static int hls_write_packet(AVFormatCont
>>    int stream_index = 0;
>>    int range_length = 0;
>>    const char *proto = avio_find_protocol_name(s->url);
>> -    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
>> +    int use_temp_file = proto && !strcmp(proto, "file") && (hls->flags & HLS_TEMP_FILE);
>>    uint8_t *buffer = NULL;
>>    VariantStream *vs = NULL;
>>    AVDictionary *options = NULL;
>> @@ -2249,7 +2249,8 @@ static int hls_write_packet(AVFormatCont
>>            if (hls->flags & HLS_SINGLE_FILE) {
>>                ret = flush_dynbuf(vs, &range_length);
>>                if (ret < 0) {
>> -                    av_free(old_filename);
>> +// old_filename not yet defined here
>> +//                    av_free(old_filename);
>>                    return ret;
>>                }
>>                vs->size = range_length;
>> @@ -2268,19 +2269,23 @@ static int hls_write_packet(AVFormatCont
>>                }
>>                ff_format_io_close(s, &vs->out);
>> 
>> -                // rename that segment from .tmp to the real one
>> -                if (use_temp_file && oc->url[0]) {
>> -                    hls_rename_temp_file(s, oc);
>> -                    av_free(old_filename);
>> -                    old_filename = av_strdup(vs->avf->url);
>> -
>> -                    if (!old_filename) {
>> -                        return AVERROR(ENOMEM);
>> -                    }
>> -                }
>> +// bad place for rename here, it does not rename non-fmp4 files
>> +//                // rename that segment from .tmp to the real one
>> +//                if (use_temp_file && oc->url[0]) {
>> +//                    hls_rename_temp_file(s, oc);
>> +//                    av_free(old_filename);
>> +//                    old_filename = av_strdup(vs->avf->url);
>> +//
>> +//                    if (!old_filename) {
>> +//                        return AVERROR(ENOMEM);
>> +//                    }
>> +//                }
> remove the code block when it unused.
>>            }
>>        }
>> 
>> +        if (use_temp_file && oc->url[0] && !(hls->flags & HLS_SINGLE_FILE))
>> +            hls_rename_temp_file(s, oc);
>> +
>>        old_filename = av_strdup(vs->avf->url);
>>        if (!old_filename) {
>>            return AVERROR(ENOMEM);
>> @@ -2346,7 +2351,7 @@ static int hls_write_trailer(struct AVFo
>>    AVFormatContext *vtt_oc = NULL;
>>    char *old_filename = NULL;
>>    const char *proto = avio_find_protocol_name(s->url);
>> -    int use_temp_file = proto && !strcmp(proto, "file") && (s->flags & HLS_TEMP_FILE);
>> +    int use_temp_file = proto && !strcmp(proto, "file") && (hls->flags & HLS_TEMP_FILE);
>>    int i;
>>    int ret = 0;
>>    VariantStream *vs = NULL;
>> ---
>> -- 
>> Aleksey Skripka
>> -- 
>> Aleksey Skripka
>> 
> 
> Thanks
> 
> Steven
>> 
>> 
>> _______________________________________________
>> ffmpeg-devel mailing list
>> ffmpeg-devel at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> 
> 
> 
> _______________________________________________
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